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KUWAIT OIL COMPANY (K.S.C.)

STANDARDS PUBLICATION

KOC RECOMMENDED PRACTICE

FOR

THE PROTECTION OF KOC SERVICES: CLEARANCE REQUIREMENTS FOR BURIED

PIPELINES, CABLES, UNDERGROUND STRUCTURES, BUILDINGS AND HOUSING

PROJECTS

STANDARDS TEAM

DOC. NO. KOC-L-002

KUWAIT OIL COMPANY (K.S.C.)

STANDARDS PUBLICATION

DOC. NO. KOC-L-002 Page 1 of 38 REV.2

STANDARDS TEAM


FOR

THE PROTECTION OF KOC SERVICES:

CLEARANCE REQUIREMENTS FOR

BURIED PIPELINES, CABLES, UNDERGROUND

STRUCTURES, BUILDINGS AND

HOUSING PROJECTS

DOC-NO. KOC-L-002

I-.


FOR

THE PROTECTION OF KOC SERVICES:

CLEARANCE REQUIREMENTS FOR

BURIED PIPELINES, CABLES,

UNDERGROUND STRUCTURES,

BUILDINGS AND HOUSING PROJECTS

ISSUING AUTHORITY:

STANDARDS TEAM

Snr. Engr. Standards Tel. No. 61407 Tel. No. 61407

Page 2 of 38 DOC. NO. KOC-L-002 REV.2


TABLE OF CONTENTS

PAGE NO.

FOREWORD 5

1.0 SCOPE 7

2.0 APPLICATION 7

3.0 TERMINOLOGY 8 3.1 Definitions 8 3.2 Abbreviations 9

4.0 REFERENCE CODES AND STANDARDS 10 4.1 Conflicts 10 4.2 List of Standards and Codes 10

5.0 ENVIRONMENTAL CONDITIONS 12

6.0 HEALTH, SAFETY AND ENVIRONMENT 12

7.0 BASIC REQUIREMENTS 13 7.1 General 13 7.2 Interaction Tests 14 7.3 Depth of Soil Cover 14 7.4 Safety Measures 14 7.5 Co-ordination with MinistrieslOrganisations 15

8.0 PROTECTION REQUIREMENTS 16 8.1 Interaction Measures 16

9.0 CLEARANCE REQUIREMENTS BETWEEN BURIED PIPELINES 17 9.1 Pipelines Crossing Each Other 17 9.2 Clearance Between Cathodically Protected and I or

Unprotected Pipelines in Parallel or with Other Structures 17

10.0 CLEARANCE REQUIREMENTS IN VALVE PITS FOR CRUDE OIL, GAS AND CONDENSATE PIPELINES 19

11.0 CLEARANCE REQUIREMENTS BETWEEN PIPELINES AND CABLES 19 11.1 Pipelines and Telecommunication Cables or

Low Voltage (440V and below) Cables 19 11.2 Pipelines, and Electrical Power Cables Operating at

3.3 kV and 11 kV 20 11.3 Clearances Between KOC Services and MEIEW Medium 81

High Voltage Cables 20 11.4 Clearances Between KOC Pipelines and Overhead

Power Transmission Lines 21

12.0 CLEARANCE REQUIREMENTS BETWEEN ELECTRICAL POWER CABLES AND TELECOMMUNICATION CABLES

13.0 CLEARANCE REQUIREMENTS FOR BUILDINGS AT PROCESS FACILITIES

14.0 SPACING REQUIREMENTS FOR HOUSING PROJECTS I BUILDINGS NEAR HYDROCARBON PIPELINE CORRIDOR

15.0 SPACING REQUIREMENTS FOR HOUSING PROJECTS I BUILDINGS FROM OIL & GAS WELL HEADS

16.0 BUILDINGS WITHIN KOC RESIDENTIAL AREAS 16.1 General 16.2 Clearances from Underground Services

17.0 PROTECTION OF EXISTING SERVICES DURING CONSTRUCTION 17.1 General 17.2 Temporary Crossing Points 17.3 Pipelines in Casing 17.4 Cased Crossings - Cables

18.0 QUALITY ASSURANCE

19.0 DOCUMENTATION 28

20.0 APPENDICES 29-36

APPENDIX 1 CASE A: NEW PIPELINE AT CROSSING POINTS WHERE EXISTING PIPELINE LAYS AT 1000 M M DEPTH 29

CASE B: NEW PIPELINE AT CROSSING POINTS WHERE EXISTING PIPELINE EXCEEDS 2000 M M DEPTH 30

APPEN DlX 2 CLEARANCE FROM PIPELINE FOR STRUCTURE AND CABLES 31

APPENDIX 3 VALVE PIT CLEARANCES FOR HYDROCARBON LINES 32

APPENDIX 4 ACCEPTABLE CABLE SLACK WHEN CROSSING PIPELINES 33

APPENDIX 5 CLEARANCE FOR POWER CABLES AND TELECOM CABLES 34

APPENDIX 6 PIPELINE ENCASING FOR KOC FIELD ROADS 35

APPENDIX 7 CASED CROSSING OF CABLES: KOC FIELD ROADS AND PIPELINE BACKFILLING 36

ACKNOWLEDGEMENT 37

FOREWORD

This document "KOC Recommended Practice for the Protection of KOC Services: Clearance Requirements for Buried Pipelines, Cables, Underground Structures, Buildings and Housing Projects (Rev.2Im, has been revised to remove some ambiguities and duplications from Rev.1 of this RP, after final publication of "KOC RP for Plant Layout (KOC-L-028)".

It is intended to recommend basic technical information for providing protection and clearance requirements between various services to minimize the adverse effects of enhanced corrosion and improve mechanical integrity, as well as to ensure safe working environment for personnel and property. Refer to KOC-L-028 for the minimum distances I spacing recommended for the plant layout within and outside

This RP (KOC-L-002), Rev. 2, shall supersede i ts Rev. 1 including previous KOC Standards 38111 3 Part-3 "Clearances between buried pipelines, services, cables and underground structures" and 381126 "Working clearances for hydrocarbon lines in valve pits", which were already withdrawn during publication of Rev.1 of this RP.

This RP does not address the Fibre Optics Cable Networks; and it also specifically excludes spacing between submarine pipelines I cables.

This RP sets out to achieve the following objectives:

1. Provide technical guidance, and recommend minimum clearance between buried pipelines, piping, cables, underground structures; and spacing from buildings and housing projects for developing project specifications, with a view to fulfil KOC objectives of HSE requirements as well as to achieve uniformity, quality and reliability in an economical manner.

2. Recommend safe working space for pipelines and piping in valve pits. ..-

3. Recommend minimum spacing required between pipelines for safer and effective maintenance & operation.

4. Recommend minimum spacing requirements of housing projects and buildings I structures from hydrocarbon pipeline corridors and / or oil and gas well-heads.

Feedback as well as any comments I suggestions or enquiries to the application of this Recommended Practice are encouraged and should be directed to:

The Team Leader Standards (Chairman, Standards Technical Committee) P. 0. Box 9758, Ahmadi, 61008 State of Kuwait

REV.2 8

Task Force Responsible for this Recommended Practice

The Standards Technical Committee (STC) has entrusted the revision (Rev.2) of this Recommended Practice to the Task Force (TF-LPI11) comprising of the following members:

Mr. S. Kumar Standards Team TF Leader Tel. 61407 Mr. A. Unnikrishnan Standards Team Member Tel. 61633 Mr. N. Ramanathan Major Projects (EFP) Member Tel. 66960 Mr. Barun Baruah Safety Team Member Tel. 71408 Mr. Gopa Kumar Gen. Projects Team Member Tel. 61 388 Mr. Shabbir T. Safri Insp.& Corr. Team (S&E) Member Tel. 6 1527 Mr. Ali Zalzalah Cons. Networks Team Member Tel. 9723363

DOC. NO. KOC-L-002

1.0 SCOPE

DOC. NO. KOC-L-002

1.1 This Recommended Practice (RP) describes the basic technical guidelines for the clearances and protection requirements between various new and existing underground services and installations, which are considered necessary to minimize the interactions, leading to enhanced corrosion or other adverse interferences within KOC operational and non-operation areas.

Page 7 of 38 REV.2

1.2 This RP refers also to KOC-L-028 "KOC RP for Plant Layout" for the basic requirements of minimum spacing between various KOC services and installations (underground and aboveground), which shall be maintained at all times for safe operation and protection within and outside KOC plants and facilities.

1.3 This RP recommends the minimum spacing required between underground pipeline corridors and inhabited buildings, and the associated risks due to enhanced corrosion.

1.4 However, this RP shall not be applicable to the following:-

a. The aboveground pipe-work within and outside of the process plant.

b. Flow lines from well heads and domestic sanitary pipelines within Ahmadi Town.

c. Submarine pipelines / cables.

d. Fibre optics cable networks.

2.0 APPLICATION

2.1 This RP provides recommendations and clearance requirements where new pipelines, piping (metallic or non-metallic) and cables are crossing or running in parallel with the following existing and / or new KOC services:

a. Cathodically protected buried pipeline and other services.

b. Cathodically unprotected pipelines, piping and other services.

c. Buried power cables, telecommunication and control cables.

d. ME/EW power transmission and distribution systems (underground cables or

overhead lines) operating at medium and high voltage.

e. Buildings and housing projects outside KOC production area.

2.2 This RP provides minimum clearance / space requirements between the pipelines within a single corridor for safest maintenance and operation.

2.3 Any exceptions or deviations from this RP, along with their merits and justifications, shall be brought to the attention of KOC Controlling Team for their review, consideration and amendments by Standards Team (if required).

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DOC. NO. KOC-L-002

2.4 Compliance with this RP does not itself confer immunity from legal or statutory obligations and requirements.

3.0 TERMINOLOGY

3.1 Definitions

For the purposes of this RP, the following definitions shall apply:

3.1 .I Building

Above ground steel or concrete structures, inhabitant and I or non-inhabitant.

3.1.2 Cables

Power, Communication, Signal I Instrumentation Control Cables installed within and outside KOC operational areas with the exclusion of cables for earthing and cathodic protection.

3.1.3 Clearance

Distance between edge to edge of two items I objects, or between OD of pipes (flanges) as applicable, measured in metres (andlor feet).

3. I .4 Field Roads

Designated asphalted roads as access ways and tracks in KOC operational areas and under KOC jurisdiction.

3.1.5 Interaction tests

Tests to determine the severity of corrosion interaction between two buried or immersed structures.

3.1.6 KOC Operational Area

Areas covered by Tank Farms, Gathering Centres, Booster Stations, Water Injection I Disposal Plants, Water Stations, Manifolds and KOC Corridors for crude, condensate, gas, water pipelines and cables and the like.

3.1.7 KOC Non-operational Area

All other KOC areas not covered under the clause 3.1.6 above, but under KOC jurisdiction like KOC Housing and Community Services.

3.1.8 Piping

Network of service pipes underground and aboveground within any facility or process center such as Gathering Centers, Booster Stations, Water Injection I Disposal Plants, Water Stations, Tank Farms, and Manifolds.

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Page 8 of 38 REV.2

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3.1.9 Pipelines

A line of pipes, of any continuous length without frequent branches for carrying and / or transporting hydrocarbons (liquid or gas), effluent I oily water, brackish water and other products. They can run underground and I or aboveground outside the plant areas between various facilities and installations.

3.1.1 0 Right-of-way (ROW)

Entire width of reserved corridor(s) for pipelines, power transmission lines, and roadways etc.

3.1.1 1 Spacing

Distance between centre line to centre line of two items or diameters of pipelines.

3.1.12 State Authorities

Kuwait Municipality and Public Authority for Housing Welfare.

3.1.13 Structure

Steel reinforced box culverts, valve pits, foundations for buildings, bridge etc.

3.1 . I4 Sub-surface

Underground structure whose top flushes almost at the formation level or natural ground.

3.1 .I 5 Utility Buildings

Buildings and / or enclosures for housing the generator, air compressor, boiler and fire pumps.

3.2 Abbreviations

BS Booster Station CP Cathodic Protection GC Gathering Center HSE Health, Safety and Environment HV High Voltage KNPC Kuwait National Petroleum Company KOC Kuwait Oil Company (K.S.C.) LV Low Voltage MEIEW Ministry of Energy / Electricity and Water MPW Ministry of Public Works MOC Ministry of Communications NGL Natural Ground Level QRA Quantitative Risk Assessment UPVC Unplasticized Poly Vinyl Chloride


REV.2 1 4.0 REFERENCE CODES AND STANDARDS

4.1 Conflicts

In the event of conflicts between this RP and the Standards I Codes referenced herein, or other contractual requirements, the most stringent requirement shall apply, in view of meeting higher HSE standards and concerns.

4.2 List of Standards and Codes

The latest edition of the following standards and codes shall apply:

4.2.1 National I international Standards

API 580 Risk-Based Inspection

API 581 Risk-Based Inspection Base Resource Document

API RP752 Management of Hazards Associated With Location of Process Plant Buildings

API RP1102 Steel Pipelines Crossing Railroads and Highways

API 1160 Managing System Integrity for Hazardous Liquid Pipelines

ASME 831.3 Process Piping

ASME B31.4 Pipeline Transportation Systems for Liquid Hydrocarbon and Other Liquids

ASME B31.8 Gas Transmission and Distribution Piping Systems

ASTM G57 Test Method for Field Measurement of Soil Resistivity using the Wenner Four Electrode Method

BS 7361 Part 1 Cathodic Protection: Code of Practice for Land and Marine Applications

BS EN 14161 Petroleum and Natural Gas Industries - Pipeline Transportation system

IS0 15589-1 Petroleum and Natural Gas Industries - Cathodic Protection of Pipelines Transportation System Part 1 : Onland Pipelines

NACE RP 0169 Control of External Corrosion on Underground or Submerged Metallic Piping Systems

DOC. NO. KOC-L-002 Page 10 of 38

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DOC. NO. KOC-L-002

NACE RP 0177 Mitigation of Alternating Current and Lightning Effects on Metallic Structures and Corrosion Control Systems

NACE RP 0286 Electrical Isolation of Cathodically Protected Pipelines

4.2.2 KOC Standards

KOC-C-005 KOC Standard for Materials and Workmanship - Site Preparation and Earthworks

KOC-C-006 KOC Standard for Concrete Works - Materials and Construction

KOC-C-024 Part 1 KOC Standard for Materials and Workmanship - Roadways, Paving and Hard Standing: Part 1: Flexible Pavement

KOC-G-002 KOC Standard for Hazardous Area Classification

KOC-G-007 KOC Standard for Basic Design Data

KOC-G-012 KOC Standard for Plant Equipment Identification, Nameplates and Pipeline Markers

KOC-L-0 1 5 KOC Recommended Practice for External Cathodic Protection of Underground Steel Pipelines & Piping Networks

KOC-L-027 KOC Standard for Layout, Spacing and Diking of Aboveground Petroleum Storage Tanks

KOC-L-028 KOC Recommended Practice for Plant Layout

KOC-P-004 Part 8 KOC Standard for Underground Piping I Pipelines - High Build Epoxy Coating

KOC-P-004 Part 9 KOC Standard for Underground Piping / Pipelines - High Build Polyurethane Coating

381113 Part 1 Standards Requirements and Regulations for the Protection of KOC Services Part 1: Crossing of Roads and Motorways under Construction

KOC HSE GUIDE LINES

KOC FIRE AND SAFETY REGULATIONS

Page 11 of 38 REV.2

4.2.3 KOC Standard Drawings

I

15-14-10 Standard Valve Pits for Pipe Lines

DOC. NO. KOC-L-002

15-14-1 3 Standard Pipe Sleeves (KOC)

5.0 ENVIRONMENTAL CONDITIONS

Page 12 of 38

5.1 The environment of Kuwait is severe, and must be considered carefully for selection and before procurement of plant and equipment.

REV.2

5.2 For environmental conditions in Kuwait, refer to "KOC Standard for Basic Design data" (KOC-G-007), which provides the detailed design information regarding the environmental, site and utility supply conditions prevailing throughout the KOC facilities.

6.0 HEALTH, SAFETY AND ENVIRONMENT

6.1 The engineering requirements should meet all the applicable Kuwait EPA regulations & International 1 National Standards and shall conform to all relevant KOC Health, Safety and Environment Management (HSE MS) procedures deemed applicable to the task / job, with a view to protecting personnel, community and surrounding environment.

6.2 All relevant safety requirements of KOC Health, Safety and Environment Management (HSE MS) Procedures and KOC Fire and Safety Regulations shall be adhered to by all personnel including KOC and Contractors to protect human life, property and surrounding environment while performing the works within KOC areas.

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7.0 BASIC REQUIREMENTS

7.1 General

7.1 .I In addition to enforcement of HSE requirements stated in clause 6.0 of this RP, all precautionary measures and safeguards described in this RP shall be applied:

a. when new metallic and non-metallic pipeline / piping crosses over or converges with the existing underground services, pipelines and piping. The minimum clearance shall be maintained in accordance with Appendix 1 of this RP.

b. when crossing the existing pipelines; and power 1 control / telecommunication cables shall meet the requirements as given in Appendix 2 of this RP.

7.1.2 Newly buried pipelines, piping and cables shall not run parallel to the existing services unless they maintain specified clearance. Safe guards against any interaction shall be considered where enhanced corrosion conditions or magnetic field or heavy electrical currents are present.

7.1.3 Where cathodically protected pipeline comes closer to or crosses over the unprotected services or structures, greater clearance or increased insulation shall be considered in the design.

7.1.4 Where applicable as in above clauses 7.1.2 & 7.1.3 of this RP, the following should be further considered and shall be brought to the attention of KOC Corrosion Team for guidance and advice:

a. Evaluation of present condition and application of appropriate coating.

b. Level of cathodic protection based on historical records of protective currents, CP potential data and periodic maintenance carried out.

c. Reviewing magnitude and intensity of existing cathodic protection system.

d. Reducing the effects of induced AC current due to presence of high voltage.

e. Soil resistivity due to gradient difference at critical locations.

f. Presence of bare copper conductor used for earthing system or its upgrade i.e. by copper plates. The use of copper plates for earthing purposes is prohibited near cathodically protected facilities and if already existing, shall be replaced by zinc anodes.

g. Electrical continuity of cathodic protection system and bonding.

h. Electrical isolation where required from adjacent pipeline or metallic structure.

- REV.2 DOC. NO. KOC-L-002

i. Reducing the possible sources of interference and any galvanic action due to presence of stray currents, magnetic fields or radio interference.

7.2 Interaction Tests

7.2.1 Where the underground structures or pipelines are in a close proximity, interaction tests shall be carried out in accordance with BS 7361 Part 1.

7.2.2 The maximum negative potential value (pipe / structure-to-soil) permissible shall be -1.2 V (vs.Cu/CuSOq) instant-off for coated structures as per "KOC RP for External Cathodic Protection for Underground Steel Pipelines & Piping Networks" (KOC-L-015), unless cathodic disbondment test data approved by KOC permits relaxation of such limit. The maximum negative pipe / structure-to-soil potential permissible for uncoated structure shall be -2.5V (vs. Cu/CuSO4) instant-off.

7.2.3 The maximum positive potential change at any part of secondary structure resulting from interaction should not exceed +20 mV as per BS 7361 Part I. The potential change higher than +20 mV shall require other considerations of improving the quality of insulating coatings, reviewing current, remedial bond or increasing the spacing between structures as appropriate.

7.3 Denth of Soil Cover

7.3.1 All buried pipelines shall be installed below the Natural Ground Level (NGL). Minimum depth of soil cover shall not be less than 1000 mm from the ground level to the top of pipeline(s).

7.3.2 In areas where soil erosion may occur or at locations where future grading is expected, i.e. roads or ditch crossings, applicable protection such as sleeves, culverts, anchor-block, plantation of grass, water run-off and application of bituminous-sand layer on ground should be considered.

7.3.3 Particular care shall be taken in assessing the depth requirement in areas where high ground water level exists. The design specification and drawings shall include this special requirement as applicable.

7.3.4 The effects of cyclic conditions on soil resistivity and the suitability of protective coating material shall be reviewed, where the pipes are buried at more than 1000 mm from the ground level.

7.4 Safety Measures

7.4.1 Safety measures shall be provided for installation, maintenance, operation and testing of valves / flanges / fittings on the underground piping, and pipelines inside the valve pits, drain pits, and similar structures, by ensuring adequate clearance spacing for safe working and maintenance conditions. This shall equally be applicable to other hydrocarbon installations in pipe culverts and piping channels.

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7.4.2 Where the areas are classified as hazardous in accordance with "KOC Standard for Hazardous Area Classification" (KOC-G-002), no source of ignition or heat shall be allowed unless the equipment is approved and certified for its location from a recognized and KOC approved certifying authority.

7.4.3 Safety measures and special attentions shall be required for identification of existing underground power cables in accordance with KOC Fire and Safety Regulations; and all necessary protection shall be taken while installing new underground services in KOC operational and non-operational areas. Particular care shall be exercised while locating and identifying high voltage MEiEW cables.

7.4.4 Where coming in close proximity to housing I buildings, additional consideration shall be given for the selection of suitable material for pipe-work in accordance with BS EN 14161, ASME B31.4 or ASME B31.8.

7.4.5 Increased thickness, extra protection and constant monitoring should be introduced when pipelines transporting hydrocarbon products pass close to occupied buildings. Under all circumstances, the design requirements as per location class given in BS EN 14161, ASME B31.4 & ASME B31.8 shall be provided for additional safety measures.

7.4.6 During the design and installation of pipelines when passing through a lowest gradient, drainage point shall be considered where water and condensate may become stagnant and where applicable, a procedure shall be implemented for constant draining, flushing out, pigging and other maintenance operations.

7.5 Co-ordination with Ministries/Or~anisations

7.5.1 Wherever KOC pipelines, power I telecommunication cables, and underground structures interfere with the existing services of KNPC, MOC, ME/EW, MPW or other authorities, the minimum clearance requirements shall be decided on mutual coordination in accordance with the prevailing regulations of respective authorities. Prior agreement shall be obtained from the concerned authorities before initiating any construction activities.

. 7.5.2 KOC has the right to exercise conservative approach for increasing the minimum

clear distance(s) from engineering norms based on the historical information and accidents. Under the site constraint specified, minimum clearance shall not be reduced unless proven engineering norms are applied.


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8.0 PROTECTION REQUIREMENTS

8.1 Interaction Measures

8.1 .I Where an impressed electrical current field exists, the clearance for buried steel pipelines should be increased to ensure non-interference from each other and points of maximum interference should be determined by field testing. Where necessary, means of current flow through sufficient resistive bonds shall be applied.

8.1.2 To avoid interference currents between ground bed for CP rectifiers and other unprotected structures, the minimum clearance shall be maintained; and where necessary, the CP ground bed should be re-located.

8.1.3 An adequate clearance between all underground services and / or structures shall be maintained to reduce galvanic interaction.

8.1 -4 Under all conditions the electrical continuity of cathodically protected systems shall be maintained by controlled bonding across non-welded joints (flanges, valves, insulating joints, blinds etc.). Refer to clause 7.1 3 of KOC-L-015 for further details.

8.1.5 Electrical isolation shall be maintained for cathodically unprotected pipeline / structures from cathodically protected systems as per clause 7.14 of KOC-L-015.

8.1.6 Pipeline casings wherever used to protect the carrier pipes should be electrically isolated.

8.1.7 When cables or other services are crossing over existing cathodically protected pipeline, extra care shall be taken to avoid any damage to its coating.

8.1.8 A minimum 1000 mm horizontal clearance should be maintained for pipelines running in a single corridor for easy access, safe operation and maintenance as shown in Figure 5 of Appendix 1 of this RP, unless otherwise specified.

8.1.9 Consideration shall be given for an isolation of pipeline passing through critical and residential areas.

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DOC. NO. KOC-L-002

9.0 CLEARANCE REQUIREMENTS BETWEEN BURIED PIPELINES

9.1 Pipelines Crossina Each Other

9.1 .I Where the soil level is not greater than 1000 mm over the existing pipelines, any new pipeline(s) at crossing point shall run below the existing pipeline by maintaining vertical clearance of 1000 mm as shown in Figure 1, Appendix 1 of this RP.

9.1.2 Where this clearance of 1000 mm cannot be maintained, a minimum clearance of 300 mm shall be provided at crossing points between the bottom of the existing pipeline and the top of the new pipeline, provided a 75 mm thick concrete slab of Grade D 1 strength class C30 as per KOC-C-006 is installed at centre of clearance, and shall be properly supported on either sides of pipes. The slab shall be extended I000 mm on either side from the outer diameter of new and existing pipeline as shown in Figure 2, Appendix 1 of this RP.

9.1.3 Where the depth of existing pipeline is 2000 mm or more plus (+) the diameter of new pipeline, then it should run above the existing pipeline provided the required clearance / spacing and soil cover of 1000 mm is maintained as shown in Figure 3, Appendix 1 of this RP.

9.1.4 Where the depth of existing pipeline is 1300 mm plus (+) the diameter of new pipeline, then it will run above the existing pipeline provided a 75 mm thick concrete slab of Grade D / strength class C30 as per KOC-C-006 is installed at centre of clearance, and shall be supported on either sides of pipes. The slab shall extend 1000 mm on either side from the outer diameter of new and existing pipeline as shown in Figure 4, Appendix 1 of this RP.

9.2 Clearance Between Cathodicallv Protected and I or Unprotected Pipelines in Parallel or with Other Structures

9.2.1 Generally when running in parallel, a minimum horizontal clearance of 1000 mm shall be maintained between cathodically protected and / or unprotected pipelines for system integrity and easy operation and maintenance.

9.2.2 This separation distance can be reduced under constraint conditions, provided the interference and soil analysis are carried out to ensure that the pipelines or structures will not be subject to a positive charge of +20 mV or higher at any point and time.

9.2.3 However in any case, new cathodically protected underground pipeline shall maintain a horizontal clearance 1 separation distance of minimum 1000 mm from existing underground structures as shown in Figure 1, Appendix 2 of this RP.

9.2.4 Where this separation distance between cathodically protected and unprotected services shall fall less than 1000 mm, approval from KOC Controlling Team is needed as a special case.

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DOC. NO. KOC-L-002

9.2.5 Under this special criterion in clause 9.2.4 above subject to KOC approval, the minimum distance 1 clearance can be reduced only after considering the following factors as below:

a. Interaction surveys shall be carried out to ensure the adequacy of all arrangements, where the potential difference of all pipelines involved and other structures would satisfy the requirements of BS 7361 and KOC-L-015 "KOC Recommended Practice for External Cathodic Protection of Underground Steel Pipelines & Piping Networks".

b. Based on the periodic inspection, change in soil behaviour under high / low tidal conditions and other operational and environmental effects, additional current should be induced where provision is available.

c. In cases where an interline bond is established between cathodically protected pipelines and unprotected services, a permanent resistive bond of appropriate design shall be installed at suitable locations along with permanent test points to enable proper control and monitoring.

d. The interline bond shall be by an insulated copper conductor, adequately sized to carry a fault current that may flow but under all circumstances, the cable conductor size shall not be less than 35 mm2. No portion of copper conductor shall have contact with the soil.

e. The bonds shall be suitably protected from mechanical or other damages. They shall not be made buried without any test point and shall be sig nposted.

9.2.6 The minimum clearance between buried pipelines and other underground structures, both cathodically un-protected, shall not be less than 1000 mm horizontally.

9.2.7 The installation of new insulation or improving the standard of existing one on the cathodically unprotected pipeline or metallic structure shall be considered in accordance with the requirements of BS 7361. Where applicable, the insulation shall extend to a minimum length of 1000 mm away from the outer diameter of each side of the crossing point or convergence.

9.2.8 Electrical transmission tower footings and pylons pose particular problems; and a minimum distance of 3000 mm shall be maintained between these foundations and buried pipelines as well as from any other underground structures (pits).

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10.0 CLEARANCE REQUIREMENTS IN VALVE PITS FOR CRUDE OIL. GAS AND CONDENSATE PIPELINES

10.1 The minimum working clearances required in the valve pits between valves / fittings and valve-pit walls in all sub-surface valve-pits and similar enclosures shall be in accordance with Appendix 3 of this RP, which should conform to latest revision of KOC Standard Drg No. 15-14-10.

10.2 Where several pipelines each having valves and fittings are to be installed in a common pit or enclosure, the minimum working clearance between different valve items shall be decided on the basis of larger diameter pipeline, to finalize the overall size of valve pit.

10.3 The minimum clearances between valves, fittings and other obstructions shall be maintained as per Appendix 3 of this RP for workman safety. Where the future expansions are expected, the distances shall be increased to cater for safe operation, maintenance and modifications.

10.4 The minimum clearances as specified in the Table of Appendix 3 of this RP should provide adequate space for routine maintenance and repair works such as flange breaking, line cutting and welding. Similar clearances shall be applicable for Drip Barrels in KOC gas lines.

10.5 Increased clearances should also be considered as appropriate, where some specialized installations such as corrosion monitoring, iron probe withdrawal and an intelligent pig alerts are provided.

10.6 These extra clearances may require deeper pits having pipe crossings at multiple levels where the supports of heavy valves are required in addition to certain covers and "access ladders". The project specifications and design drawings shall incorporate the additional clearance requirements as appropriate.

11.0 CLEARANCE REQUIREMENTS BETWEEN PIPELINES AND CABLES

11.1 Pipelines and Telecommunication Cables or Low Voltage (440 V and below) Cables

11 .I .I In cases, where the buried pipelines (cathodically protected and / or unprotected) or containment sleeve's upper point is 1250 mm or more below ground level, the low voltage cables or telecommunication cables shall be run in ducts above the pipeline to ensure a minimum clearance of 750 mm between cable and ground level and 300mm between invert level of cable duct and upper point of the pipeline or sleeve. For details refer to Figure 2, Appendix 2 of this RP.

11.1.2 In cases, where the buried pipelines or containment sleeve's upper point is less than 1250 mm below ground level, the low voltage cable or telecommunication cables shall be run in ducts with the upper point of the dud at a minimum clearance of 300 mm below the invert level of the pipe or the sleeve. For details refer to Figure 3, Appendix 2 of this RP.

REV.2 DOC. NO. KOC-L-002

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11.1.3 Where telecommunication cables are installed in the vicinity of a cathodically protected pipeline, particular care shall be taken to avoid any interference. In such cases, the horizontal separation clearance shall not be less than 1000 mm under any circumstances.

1 I .I .4 A suitable length of "cable slack for low voltage cable and telecommunication cable shall be provided at each point of crossing over pipelines. The acceptable means of meeting this requirement is given in Figure 2, Appendix 4 of this RP.

11.1.5 Cable runs shall be laid to meet the minimum bending radii of the cables. Cables running in parallel to pipelines shall be avoided.

1 1 .I .6 Wherever a low voltage cable or telecommunication cable crosses a buried pipeline in any special situations other than the general cases mentioned in clauses 11 .I .I to 11 .I .4 above, the minimum clearance to be maintained, shall be subject to KOC review and approval.

I 1 .I .7 Ducts for protecting cables can be PVC I Metal I Concrete and either insulated heat resistant or load bearing, and shall be specified by KOC as applicable in the relevant Project specification.

11.2 Pipelines and Electrical Power Cables Operating at 3.3 kV and 11 kV

11 2.1 Power supply cables operating at 3.3 kV and 11 kV shall be run in a duct below the buried pipeline(s), unless otherwise authorised by KOC. These power cables shall be installed by maintaining the minimum vertical clearances from the pipelines at crossings as specified in Table I and in accordance with Figure 4, Appendix 2 of this RP.

Table I : Minimum Clearances between Pipelines and Cable Ducts

11.2.2 A suitable length of cable slack for power cables shall be provided at each point of crossings over pipeline(s). The acceptable means of meeting this requirement should be in conformity with Figure 1, Appendix 4 of this RP. Cable runs shall ensure that minimum bending radii of the cables are met.

11.3 Clearances Between KOC Services and MElEW Medium & High Voltage Cables

11.3.1 Where KOC pipelines, cables and other services to be installed in the vicinity of existing underground MEIEW medium and high voltage power cables, prior permission shall be taken from MEIEW by close coordination between both authorities before commencement of any work.

I Page 20 of 38

Minimum Vertical Clearance Between Pipelines and Cab@ Ducts

500 mm 1000 mm

SI. No.

1 2

* Cable Type

3.3 kV 11 kV

DOC. NO. KOC-L-002

11.3.2 In general, as per MEIEW stipulations, the medium and high voltage power cables shall be separated from other services by the following minimum recommended separation distances :-

a. Horizontal Clearance : 3.0 m; b. Vertical Clearance : 1.0 m.

These minimum clear distances should be measured from the outer edges of the pipe-way or cable corridor.

11.3.3 Extreme care shall be exercised to locate MWEW's existing underground power cables during any crossing or convergence of other services; and in any situation, the identification marks and protection of MEIEW power cables shall not be disturbed or damaged. Any cable marker, if removed for excavation, shall be placed back properly.

11.3.4 The method of protection to be provided for a particular service (power I telecommunication cable, pipeline, structure or building) adjacent to MEIEW underground power cable operating at various voltage levels, shall be decided as per MWEW regulations and mutual agreement between MEIEW and KOC authorities..

11.4 Clearances Between KOC Pipelines and Overhead Power Transmission Lines

11.4.1 Extreme care shall be exercised, and permission from the concerned authorities (KOC & MEIEW) shall be taken prior to commencement of any pipeline work in the vicinity of overhead power transmission lines maintained by KOC or MEIEW.

11.4.2 The minimum horizontal separation distance between any buried pipeline and poles / structures of overhead transmission lines operating up to 11 kV shall not be less than 20 M.

11.4.3 KOC pipelines shall not be installed in the right-of-way of MWEW overhead power transmission lines under any situation. The right-of-way for various overhead power transmission lines as suggested by MEIEW shall be considered for planning purpose, and shall not be less than those given as below :-

a. I I kV Transmission lines : 20 M b. 33 kV Transmission lines : 25 M c. 132 kV Transmission lines : 40 M

11.4.4 However, the actual right-of-way for MEIEW overhead power transmission lines and the clearance requirements shall be obtained from MEIEW on a case by case basis before considering installation of KOC pipelines near any MEIEW overhead power transmission lines.

I I .4.5 Where underground pipeline(s) crosses overhead power transmission line(s), it shall be preferably be at right angles. In unavoidable situation, the horizontal angle of intersection shall be within 70° to 1 lo0 to the line, where the crossing at right angles is not practical.

Page 21 of 38 REV.2


12.0 CLEARANCE REQUIREMENTS BETWEEN ELECTRICAL POWER CABLES AND TELECOMMUNICATION CABLES

12.1 A minimum horizontal clearance of 1000 mm between buried electrical power cables and telecommunication cables shall be maintained to avoid any interference to the communication due to the proximity of power cable and induction of high voltage into the telecommunication cables.

12.2 Power and telecommunication cables following parallel routes shall have a minimum horizontal separation of 1000 mm in general; and cables having parallel runs more than 50 m in length, shall maintain the minimum horizontal separation of 1500 mm as shown in Fig. 1, Appendix-5 of this RP.

12.3 Where it is necessary for a power cable to cross a telecommunication cable or vice versa, it shall cross horizontally as near to right angles as practicable.

12.4 Telecommunication cables shall maintain a minimum vertical clearance of 500 mm at crossings from single-core or multi-core power cable of rating up to I I kV. Refer to Figure 2, Appendix-5 of this RP.

12.5 In exceptional situation, where the above specified clearance cannot be achieved at crossings, with the prior permission of KOC, it may be reduced to a minimum of 150 mm by providing a 75 mm thick concrete slab of Grade D / strength class C30 as per KOC-C-006 with an adequate width of minimum 2000 mm in-between the power cables and telecommunication cables.

The concrete slab shall be sized to overlap the power cables and telecommunication cables by a minimum of 1000 mm on either side.

13.0 CLEARANCE REQUIREMENTS FOR BUILDINGS AT PROCESS FACILITIES

13.1 The risk analysis shall be used as a guideline before deciding the locations of buildings at process facilities against potential hazards such as release of explosive and toxic gases, explosions and fire. The guidelines shall be used in accordance with the API 580 and API 581 for risk-based assessment and inspection.

13.2 The overall plant layout shall be evaluated on the basis of such factors as safety, construction, operation, maintenance and future expansion, taking into account of its topography, natural slopes or surface gradient for natural drainage.

The plant layout shall also be assessed that in the event of toxic, hazardous and flammable liquid spillage, the liquid does not flow towards other process equipment or facilities, but flows safely towards designated containment system or facilities.

13.3 Open spaces shall be provided adjacent to substations, control rooms, utility buildings, laboratories, workshops and warehouses for bulk material and storage based on its types, categories and safety requirements.

- DOC. NO. KOC-L-002 Page 23 of 38 REV.2

13.4 For spacing requirements of various buildings at process and associated facilities, reference should be made to "KOC Recommended Practice for Plant Layout" (KOC-L-028) for detailed information.

13.5 In case the minimum spacing recommended in KOC-L-028 can not be met for a unit due to space and other constraints, it should consider detailed risk assessment studies and the additional factors in design for the safe operation of buildings and facilities. The provisions for extra precautions and constant monitoring should be taken into account before finalization of locations.

14.0 SPACING REQUIREMENTS FOR HOUSING PROJECTS 1 BUILDINGS NEAR HYDROCARBON PIPELINE CORRIDOR

14.1 For deciding any site to be used for inhabited buildings 1 housing projects within the close proximity of KOC facilities and vital network of gas, condensate and crude oil pipelines corridor, a close coordination is needed between all concerned authorities like Ministry of Public Works, Kuwait Municipality and Public Authority for Housing Welfare.

14.2 A minimum safe distance shall be established based on risks evaluation, considering design and operating parameters of hydrocarbon carrying pipeline and worst weather condition. An appropriate and proven software of dispersion modelling shall be used with pipeline parameters to determine such safe distances.

14.3 However in order to meet high HSE concerns in KOC, a safer and greater distance of 500 metres shall be maintained for the nearest location of proposed or existing private I public facilities from the KOC existing or proposed pipeline 1 transit line corridors, if the intervening space permits for increased protections as per KOC-L- 028 "KOC RP for Plant Layout".

14.4 The quantitative risk analysis (QRA) shall also consider the prevailing conditions of existing pipelines; and a review shall be carried out in accordance with BS EN 14161 and / or other applicable codes for the dangers posed to public safety and property due to close proximity.

14.5 In case where the above distance of 500 m can not be maintained, and by means of above analysis if the minimum distance of proposed location be derived less than 200 metres as per the QRA analysis, it shall in no case be less than 200 metres from the edge of pipeline or from existing corridor. In such cases proper precautionary and protection measures including constant monitoring shall be adopted with the following:

a. Statutory warning signboards with danger signs shall be installed at every 100 m intervals along the pipeline corridor for at least 500 m distance on the either side of proposed inhabited buildings.

*

DOC. NO. KOC-L-002

b. The pipeline corridor shall be protected with necessary crash barrier and/or fencing to ensure that no possible encroachment by the nearby residents at any time will occur.

c. Necessary protection and constant monitoring procedures of the facilities / pipeline corridor shall be established, where the residential projects are coming in the vicinity.

d. Pipeline carrying gas shall be designed, constructed and tested with public safety in mind, where the pipelines are located in the areas of higher population as per location classes in ASME B31.8 and BS EN 14161; and additional factors are considered in design to enhance their safety.

e. The valve pits, metering stations and drain pits along the underground pipeline corridor shall be fenced with 2.8 m high barbed wire fence or chain link with lockable gate, and shall be fully inaccessible to the residents and passers-by at all times.

15.0 SPACING REQUIREMENTS FOR HOUSING PROJECTS 1 BUILDINGS FROM OIL & GAS WELL HEADS

Following clauses 14.1, 14.2 & 14.3 of this RP, a minimum distance of 500 metres shall be maintained for any proposed housing projects from the existing oil or gas well heads measured from their boundary fence.

16.0 BUILDINGS WITHIN KOC RESIDENTIAL AREAS

16.1 General

16.1 .I Utility services consisting of water, telecomm, power, and domestic gas are having underground network in KOC residential area. Therefore, it calls for extreme caution while building 1 constructing or excavating any site in Ahmadi.

16.1.2 All stringent measures, such as precautionary and statutory warnings, danger signboards and fencing, should be installed during all types of constructions and excavation works. Possible failure to any existing under ground services shall be avoided due to construction activities.

16.1.3 Based on the category of flammable and toxic substances conveyed by the pipeline(s) and estimated population density along the route, the vicinity of the buildings shall be decided as per BS EN 14161.

16.1.4 For laying a new gas pipeline in the vicinity of existing housing projects or commercial I industrial enterprises, the rule of minimum distance shall be applicable in accordance with clause 14.5 of this RP.

16.1.5 The design consideration as defined in BS EN 14161 shall be applicable if the spacing requirement cannot be met, and other option of re-routing of MAIN gas pipeline shall also be considered.

Page 24 of 38 REV.2

16.2 Clearances from Underground Services

DOC. NO. KOC-L-002

16.2.1. A minimum of 500 mm clearance shall be provided for telephone, cable ducts from underground services, storm and drain water and gas lines.

16.2.2 A minimum of 150 mm shall be provided between any telephone installations and the foundations of electricity supply poleslpylons, road lighting poles & masts, traffic signs & signal poles, gantries and overhead supports.

Page 25 of 38

17.0 PROTECTION OF EXISTING SERVICES DURING CONSTRUCTION

REV.2

17.1 General

17.1.1 All buried pipelines and cables passing through the construction area or its vicinity shall be clearly marked and 1 or flagged prior to the commencement of any construction work or any other operation.

17.1.2 A 10 m wide clear zone shall be established on either side of the existing outermost pipeline(s) or cables, and heavy vehicle, earth moving equipment etc. shall not be allowed within 5 metres from the existing services.

17.1.3 Only hand excavation shall be permitted within 5 metres from the existing services on each side of this designated zone.

17.1.4 Special permission shall be obtained from KOC Controlling Team, on the basis of the merit of each case, for any other mode of excavation or any other operations in the designated zone. In such cases, the special work permit shall be issued clearly stating the other mode of excavation or any other operation.

However for long pipelines if KOC decides to use machine excavation as special case, slit trenches by hand exaction shall be done for every 100 m on straight runs and 30 m to 50 m on bends to establish exact location of any existing pipelines.

17.1.5 No part of any plant, mobile or static, or any equipment or crane shall be brought within 15 m of any electrical overhead power lines unless all necessary safety precautions including permission I work permits from the concerned authorities are taken.

17.1.6 All general requirements of protection as specified shall be strictly adhered to at all times, by the Contractor. These protection requirements shall be subject to further review on case-by-case basis by the KOC Controlling Team.

17.2 Temporary Crossing Points

17.2.1 Unless the Contract specifies otherwise, at the time of temporary crossover of KOC pipelines during construction period to facilitate diversions from the existing field roads, the following precautions shall be taken:

a. The Contractor shall prepare a detailed plan and methodology based on the inspection carried out of the existing line(s), advising the protection measures to be taken and submit the same for KOC approval.

-. DOC. NO. KOC-L-002

b. The Contractor shall adopt the protection requirements after obtaining KOC written approval. Excavations shall be carried out strictly in accordance with KOC excavation procedures and "KOC Standard for Materials and Workmanship - Site Preparation and Earthworks" (KOC-C-005).

17.2.2 As appropriate to the hazards involved in crossing over the existing pipeline(s), a strict compliance and approved KOC procedures shall be observed during all movements.

17.3 Pipelines in Casing

17.3.1 Pipelines installed in a casing shall be properly and electrically insulated from the casing pipe. The casing shall be cathodically protected to prevent corrosion and to keep integrity of casing strength.

17.3.2 The inside diameter of the casing pipe or sleeve shall be such that during installation, coating I insulation of the carrier pipeline shall not be damaged nor any load from casing pipe shall be transmitted to the carrier pipeline.

17.3.3 The carrier pipe shall be held clear of the casing or sleeve by means of properly designed supports; and no external load shall be transferred to the carrier pipe. Multiple carrier pipes within one casing pipe or one sleeve shall not be used.

17.3.4 The casing pipe shall be properly sealed at each end to prevent any ingress of moisture, water or foreign materials and shall be fitted with vents at each end.

17.3.5 The diameters of casing pipes / sleeves for carrier pipes with or without flanges shall be provided for KOC review in accordance with KOC Standard Drawing for "Standard Pipe Sleeves" (1 5-14-1 3). Trenched and trench less construction shall be considered for installation on the basis of practical requirement.

17.3.6 In case of open trenched crossing where the minimum cover is not met, installation of casing pipe at larger depth or heavier wall casing pipe shall be adopted.

17.3.7 Pipeline crossing highways I roads shall meet the design and construction requirements of nominal thickness of casing pipe for crossing and installation in accordance with API 1102 and KOC Standard 381 I13 Part 1 for box culverts or sleeves.

17.3.8 Pipelines Encased for Field Road Crossing

a. Pipelines crossing under asphalted field roads shall be encased, and shall be laid with the minimum soil cover as given in Table II of this RP. They shall be installed by maintaining depth in accordance with Appendix 6 of this RP.

b. The casing pipes shall be extended for a minimum length of 1500 mm from the edge of drainage channel for field roads on both sides of roads.

Page 26 of 38 REV.2

c. Pipe bends under field roads are prohibited and bends are not allowed for a minimum distance of 5 metres from the edge of road and 1 or casing.

Table II : Minimum Cover of Casina P i ~ e s under Field Roads

1 7.4 Cased Crossings -Cables

17.4.1 Where underground cables are to be installed across field roads, they shall be protected by casing pipes with the minimum soil cover from the top of the casing pipe to the road surface as given in Table Ill of this RP.

Table Ill: Minimum Cover of Casina Pipes for Cables under Field Roads

17.4.2 UPVC casing pipes encased in not less than 75 mm thick concrete shall be used as shown in Appendix 7 of this RP for protection of cables crossing the field roads.

17.4.3 All components of sleeves shall be designed, manufactured, inspected and tested under the control of a documented quality control system. For general requirements of steel and UPVC sleeves, refer to relevant KOC drawings.

18.0 QUALITY ASSURANCE

The Contractor shall operate a quality system preferably based on IS0 9000 series of standards to satisfy the requirements of this Recommended Practice. The Contractor shall demonstrate compliance by providing a copy of the accredited certificate or its quality manual. Verification of the Contractor quality system is normally part of the pre-qualification procedure and is, therefore, not detailed in the core text of this Recommended Practice.

Under all other surface in the

19.0 DOCUMENTATION

19.1 All correspondence, instructions, data sheets, drawings, calculations or any other written information shall be in English language. In case of dual languages, one language shall be English.

19.2 All dimensions, units of measurement, physical constants etc. shall be in SI units, unless otherwise specified. (Pipe sizes to be generally mentioned in inches).

19.3 All documents (texts, specifications, data sheets, drawings, etc.) shall be provided in the form of electronic files in the approved software formats (latest version of Microsoft Word, Excel and Auto Cad). All calculations shall be submitted in approved and widely used software(s) agreed upon by KOC.

20.0 APPENDICES

Appendix I to 7

FIGURE I

r GROUND LEVEL -f g

@NEW PIPELINE

MAINTAIN 1000 MM CLEARANCE

P


APPENDIX 1

CASE- A : NEW PIPELINE AT CROSSING POINTS WHERE EXISTING PIPELINE LAYS AT 1000 MM DEPTH

Notes: 1. All dimensions are in mm 2. Concrete slab at half of the clearance by site measurement; and shall be extended 1000 mm on either sides from the outer

diameter of new and existing pipeline. Refer to clause 9.1.2 of KOC-L-002. 3. Site conditions may ask for concrete slab of higher thickness or reinforced.

r GROUND LEVEL

$NEW PIPEUNE

FIGURE 2 MAINTAIN 300 MM CLEARANCE

WITH CONCRETE SLAB BETWEEN NEW AND EXISTING PIPELINE

DOC. NO. KOC-L-002 I Page 30 of 38 REV.2

APPENDIX I (contd.1)

CASE- B : NEW PIPELINE AT CROSSING POINTS WHERE EXISTING PIPELINE EXCEEDS 2000 MM DEPTH

, $ 0

z3 33 z CYS 8 s + W0.i W

$NEW PIPELINE f

0''

$3: f m

tt;i r EXISTING PIPELINES ---


7 GROUND LEVEL 6 A 0 N<\Y<\Y<\Yx\Y<\Y<\Y&Y&'

MISING PIPELINES ----------


WITH CONCRETE SLAB BETWEEN NEW AND EXISTING PIPELINE

7 GROUND L M L I

1000 CLEARANCE (REFER TO NOTE 4)

I I

FIGURE 5 HORIZONTAL CLEARANCE OF NEW PIPELINE FROM EXISTING PIPELINES

Notes: 1. All dimensions are in mm 2. Concrete slab at half of the clearance by site measurement, and shall be extended 1000 rnrn on either sides from the outer -. - -

diameter of new and existing pipeline. 3. Sie conditions may ask for concrete slab of higher thickness or reinforced. Refer to clause 9.1.4 of KOGL-002. 4. Refer to relevant clause 9.2.2 of this RP for constraint condition.

-. DOC. NO. KOC-L-002

APPENDIX 2

CLEARANCE FROM PIPELINE FOR STRUCTURE AND CABLES

r GROUND L M L

FIGURE 1 CLEARANCE FROM EXISTING UNDERGROUND STRUCTURES

GROUND L M L

FIGURE 2 CLEARANCE FOR LOW VOLTAGE AND TELECOMMUNICATION CABLES AT CROSSING (WHERE THE DEPTH OF PIPES IS MORE THAN 1250 MM]

FIGURE 3 CLEARANCE FOR LOW VOLTAGE AND TELECOMMUNICATION CABLES AT CROSSING (WHERE DEPTH OF PIPE IS LESS THAN 1250 mm)

FIGURE 4 CLEARANCE FOR 3.3 kVI11 kV POWER CABLES AT PIPELINE CROSSING

Note: All dimensions are in mm

Page 31 of 38 REV.2


APPENDIX 3

VALVE PIT CLEARANCES FOR HYDROCARBON LINES

ANCHOR FLANGE NOTES:

PLATE COLLAR 1. DEPTH AND COVER REQUIREMENTS OF M E

A kl

*A = HORIZONTAL ACROSS PIPELINE

PLAN VIEW OF VALVE PIT *B = VERICAL BELOW PIPELINE *C = HORIZONTAL ALONG PIPELINE

(N.T.s.)

SECTION "A-A" (N.T.S.)

ANCHOR FLANGE OR 20 mm THK. PLATE COLLAR

SECTION "B-B" (N.T.S.)

Notes: 1. All dimensions are in mm 2. Refer to latest revision of KOC Drg. No. 15-14-1 0 for all dimensions.

.. "- .:-. .- *.. .. .i..Lj++ *. :a,..-*. a i I f.; . VALM PIT AND SEAL DErAILS DEPENDS ON .* .... . *. .. . . * . . . . . ,. . I A

- . THE PARnCULAR INSTAUATION AND

, . *. .. .

' 4 . * .. . .. . . . . . i .*. . . .' "..:.

.* . . . .

.. .. ACCORDINGLY ARE NOT DEFINED. I

C . " 2. CONCREE BLOCK SHOULD BE PROVIDED FOR HEAVIER AND LARGER VALVES INCLUDING 16" DIAMEER AND ABOVE.

3. DRAIN SHOULD BE PROVIDED FOR SPILLAGE OR RAINY WATER TO SOAK AWAY AREA.

A 4. MINIMUM DIMENSIONS %" ARE FOR ANSI

CLASS 150 WELDING NECK FLANGES. ADJUST I C ::. f DIMENSION "C" FOR HIGHER FLANGE RATINGS.

. . . ... . .u . ; .. ' - .: ..'.' 5. N.T.S. = NOT TO SCALE. - .. - , , . . 4, .$:? ; *.. : . . . % 6. ALL DIMENSIONS ARE IN MILLIMErRES


APPENDIX 4

ACCEPTABLE CABLE SLACK WHEN CROSSING PIPELINES

ELECTRIC CABLE

---------

< PIPELINES

I I I

, I I I I

- - - - - - - - ++---- I l I

M RADIUS (MIN.)

FIGURE I POWER CABLE SLACK

DUCT C

1 I1 ---kt+---------- I I I I I

I I

> PIPELINES

I l l ; -+--------- I I I

D LENGTH OF CABLE IN LOOP A-B TO BE DISTANCE C-D PLUS 5 MrnES

FIGURE 2 TELECOMMUNICATION CABLE SLACK WHEN CROSSING PIPELINES

Note: All dimensions are in rnrn


APPENDIX 5

CLEARANCE FOR POWER CABLES AND TELECOM CABLES

7 GROUND LEVEL

$ POWER $ TELEcoM. CABLE CABLE

FIGURE 1 HORIZONTAL SPACING BETWEEN POWER & TELECOMMUNICATION CABLES

7 GROUND LEVEL fiu6\u6\nnwu6\u6\u6\ud\ud\u6\u6\u6\u6\u6\

CE REDUCE TO 150MM)

(RATING UPTO 11 kV)

FIGURE 2 CLEARANCE BETWEEN POWER & TELECOMMUNICATION CABLES WHEN CROSSING

Notes:

1. All dimensions are in mm 2. In special case where 500 mm minimum clearance can not be maintained, it may be reduced to 150 mm by providing a 75 mm

thick concrete slab of Grade D I strength class C30 between power 8 telecom cables as per clause 12.5 of this RP. 3. Concrete slab shall be at half of the clearance by site measurement and shall be sized to overlap the power cable and telewm.

cable by a minimum of 1000 mm on either sides. 4. Site conditions may ask for concrete slab of higher thickness or reinforced.

.. DOC. NO. KOC-L-002

APPENDIX 6

PIPELINE ENCASING FOR KOC FIELD ROADS

MINIMUM DEPTH DRAINAGE DITCH

MINIMUM DEPTH BELOW SURFACE OF PAVEMENT

CASED CROSSINGS (TRENCHLESS INSTALLATION)

MINIMUM DEPTH DRAINAGE DITCH

MINIMUM DEPTH BELOW SURFACE OF PAVEMENT

CASED CROSSINGS (TRENCHED INSTALLATION)

Note: 1. All dimensions are in mm 2. ~efer to Standard KOC Drg. No. KOC-10-13 (latest)

Page 35 of 38 REV.2

APPENDIX 7

CASED CROSSING OF CABLES: KOC FIELD ROADS AND PIPELINE BACKFILLING

Notes:

1. All dimensions are in mm 2. Minimum depth for soil cover over casing pipestducts shall be as per clause 17.4.1 of KOC-L-002

ROAD OR GROUND LEVEL

150 (6") DIA. PVC DUCT (MIN.) FOR INSTRUMENT CABLE

FIGURE 1 CABLE ENCASING

DEPTH OF 1000 PERMITTED FROM

FIGURE 2 BACKFILLING OVER PIPELINE NOT ACCEPTABLE

ACKNOWLEDGEMENT

This RP has been approved by the Standards Technical Committee (STC) consisting of the following:

Mr. A/Redha Al-Haddad Standards Team Chairman Mr. Mohammad Emam Insp. & Corr. Team (S&E) Deputy Chairman Mr. S. Kumar Standards Team Secretary / Member Mr. A. Unnikrishnan Standards Team Mr. Khalaf Hamada Design Team Mr. N. Ramanathan Export Facilities Team Mr. Ali Hassan Al-Failakawi HSE System Team Mr. Daniel Pino Utilities Team Mr. Abdul R. Al-Shamari lnsp. & Corr. Team (N&WK) Member Mr. Khalid At-Ahmad Gen. Project Team Mr. Abdul Aziz Akbar Project Mgmt. Team (NK) Mr. Moataz Khalaf Information System Team

The draft of this RP had been circulated to the KOC User Teams for review and the responses were received from the following:

ENGINEERING GROUP TECHNICAL SERVICES DIRECTORATE

Team Leader Construction Team Leader HSE (TS)

MAJOR PROJECTS GROUP (I) MAJOR PROJECTS GROUP (11)

Team Leader Export Fac. Projects Team Leader Project Support

INDUSTRIAL SVCS. GROUP SEC. & FIRE GROUP

Team Leader Insp. & Corr. (S&EK) Team Leader Fire

AHMADI SERVICES GROUP GAS MGMT GROUP (SEK)

Team Leader Project Design Team Leader Consumers Networks

Team Leader Utilities Team Leader Gas Opns.

OPERATIONS GROUP (SK) OPERATIONS GROUP (WK)

Team Leader Opns. Tech. Svcs. Team Leader Opns. Tech. Svcs.

OPERATIONS GROUP (EK) EXPORT & MARINE OPNS GROUP

Team Leader Opns. Tech. Svcs. Team Leader Export Svcs.

Team Leader Prod. Opns.

Team Leader Maintenance

HSE GROUP HSE GROUP (NK)

Team Leader H&E Team Leader HSE (NK)

Team Leader Safety

HSE GROUP (WK) HSE GROUP (SEW

Team Leader HSE (WK) Team Leader HSE (SEK)

Task Force Responsible for this Recommended Practice

The Standards Technical Committee (STC) has entrusted the revision of this Recommended Practice to the Task Force No. TF-LPI11 comprising of the following

Mr. S. Kumar Standards Team Mr. A. Unnikrishnan Standards Team Mr. N. Ramanathan Major Projects (EFP) Mr. Barun Baruah Safety Team Member Tel. 71408 Mr. Gopa Kumar Gen. Projects Team Member Tel. 61388 Mr. Shabbir T. Safri Insp.& Corr. Team (WE) Member Tel. 61527 Mr. Ali Zalzalah Cons. Networks Team Member Tel. 9723363

koc-l-002

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