qc guidelines for base oil storage-handling - tnp (1)
TRANSCRIPT
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BHARAT PETROLEUM CORPORATION LIMITED
SECTION
1
CONTENTS
QUALITY CONTROL
GUIDELINES
FOR
BASE OILS
RECEIPT / STORAGE
&
HANDLING
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QUALITY CONTROL GUIDELINES
FOR BASE OILS& HANDLING
SECTION -
CONTENTS
CONTENTS
PAGE 1
SECTION I INTRODUCTION
SECTION A BASE OIL
A.1 Receipt
A.1.1 Sampling of tanks nominated for receiving product
A.1.2 Receipt by Ocean tanker
A.1.3 Receipt by tank trucks
A.1.4 Batch No. for receipts
A.2 Storage
A.2.1 Storage Tank
A.2.2 Other facilities
A.2.3 Number Coding
A.2.4 Quality Monitoring
A.3 Despatch
A.3.1 Despatch by tank truck
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SECTION 1
INTRODUCTION
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QUALITY CONTROL GUIDELINES
FOR BASE OILSRECEIPT, STORAGE & HANDLING
Introduction
Amendment No : 0
Date : 01.06.2007
Page 1 of 2
OBJECTIVE
To evolve a uniform quality control procedure for -
Handling of base oils at all the storage / manufacturing units
PURPOSE
To ensure
that base oils are received as per their respective specifications, stored and handled to keepthem on-spec at all times and finally finished grades are produced as per their respective
specifications.
that they are stored and handled with due care so as to keep them on-spec at all time. that they are delivered from various storage points in production good condition and
confirming to respective specifications
that a well defined QC checks and documentations exists to achieve the objectiveSCOPE
the procedure outlined in this are the minimum requirements in order to ensure the quality ofthe product. In addition, guidelines issued by P&AD Dept. from time to time needs to befollowed
It is applicable for all the manufacturing units and storage locations handling lubricants Any change in laid down procedure will should be approved by P&AD Dept. and
amendments to this effect shallould be issued accordingly.
RESPONSIBILITY
Plant in-charge shall be responsible for implementation of Quality Control procedures at theblending plant.
Any deviation from guideline should be supported by a written communication from P & AD. Formatted: Bullets and Numbering
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QUALITY CONTROL GUIDELINES
FOR BASE OILS
RECEIPT, STORAGE & HANDLING
Introduction
Amendment No : 0
Date : 01.06.2007
Page 2 of 2
DOCUMENTATION
All QC activities shall be duly documented in SAP system or in absence manually in standardformat, whichever is applicable.
The documents shall be preserved till next QC audit. In case of quality failure, the relevant QC document and the test reports shall be retained for
three years in a separate file for records. Samples shall also to be retained till investigation iscompleted.
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SECTIONA
BASE OIL
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QUALITY CONTROL
GUIDELINES FORBASE OILS RECEIPT,
STORAGE & HANDLING
Section A
Amendment No : 0
Date : 01.06.2007
Page 1 of 8
A BASE OIL
A.1 RECEIPT
A.1.1 SAMPLING OF TANKS NOMINATED FOR RECEIPT / DESPATCH
A.1.1.1 Before receiving product through ocean tanker, UL composite sample fromindividual tanks nominated for receiving the product shall be taken, leveled
labeled, sealed and retained (Appendix 3).
A.1.1.2 In case of receipt through multi product / dedicated pipeline, joint samplingbefore receiving the product has to be carried out from the tanks nominated for
transfer (i.e. receipt as well as despatch tanks) in the following manner :-
a) Sampling of tanks nominated for receipts : UL Composite Sample (1 set)b) Sampling of tanks nominated for despatch :
Upper and lower sample separately (2 sets : one set for PD test & other set
for retention)
A.1.1.3 If the sample after receipt conforms to the specification in respect of testscarried out as per Appendix 2, sample drawn under clause no. A.1.1.1 and
A.1.1.2 may be discarded.
A.1.1.4 In the event of the sample after receipt not conforming to the specification,concerned department (*) should be intimated immediately for further action.
The retained sample should not be destroyed till the investigation is over.
A.1.2 RECEIPT BY OCEAN TANKER
A.1.2.1 The installation shall be responsible for implementing the Quality ControlProcedures for receiving the product.
A.1.2.2 When a common line is used for receiving base oils, all the tanks except thetank under receipt shall be positively segregated by dropping spool pieces or
hammer blind valves or by means of spectacle flanges/liners.
A.1.2.3 The pit on the shore end should be cleaned
__________________________________________________________________________________________
(*) concerned department means Product & Application Development Department
(P&AD) and Lubricants Department Supply Chain Management (SCM)
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QUALITY CONTROL
GUIDELINES FORBASE OILS RECEIPT,
STORAGE & HANDLING
Section A
Amendment No : 0
Date : 01.06.2007
Page 2 of 8
A.1.2.4 The line should be cleaned with pig before discharge and also whenever there
is a grade changeover to ensure that the line is clear.
A.1.2.5 Load port test reports should be checked to ensure conformity to the requiredspecification. (Appendix 1) Loadport shore tank and tanker samples should be
collected from the master and retained till the quality of product after receiptestablished. Discharge arrangements shall be so adjusted to avoid any possible
contamination.
A.1.2.6 Tanker tank ullages / soundings shall be taken. An all level sample and bottomsample from the individual nominated tanker tank(s) shall be drawn separately
and tested as follows :-
a) All level sample : Test A (Appendix 2) b) Bottom sample : Test C (Appendix 2)The all level sample should be clear, free from water and the density variationshould be within 0.003 as compared to load port shore tank density. Thebottom sample should be clear and free from water. The individual tanker
tanks, if any, where the density variation is beyond 0.003, shall be subjected
to Test E (Appendix-4) separately. Accept the product if it is inevitable and
inform subsequently to P&AD dept. for disposal.
A.1.2.7 PREDISCHARGE TEST
A.1.2.7.1 If the above ( A.1.2.6) observations are satisfactory, a composite sampleshould be made in the laboratory by mixing either :
a) individual tanker tank sample in the ratio (volumetric) of the quantitiesto be discharged
ORb) In the ratio (volumetric) proportional to the quantities present in the
individual tanker tanks, in absence of above information, and tested for
Test E i.e. Pre-discharge test (Appendix 4)
Discharge may commence if the test results are satisfactory. The composite
sample is to be retained till the quality after receipt is established(Appendix 3)
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QUALITY CONTROL
GUIDELINES FORBASE OILS RECEIPTS,
STORAGE & HANDLING
Section A
Amendment No : 0
Date : 01.06.2007
Page 3 of 8
A.1.2.7.2 If the composite sample fails, then individual tanker tank sample shall bechecked for failing characteristics and the failing tanker tanks isolated.
Only those tanks meeting Pre-discharge test requirements declared fit tobedischarged. The concerned department shall be informed immediately for
further action.
The individual tanker tank sample (A.1.2.6) and the composite sample(A.1.2.7.1) is to be retained till investigation is over.
A.1.2.8 TANKER DISCHARGE THROUGH PIPELINE
A.1.2.8.1 During first one hour of product pumping, sample shall be collected from
jetty end or ships manifold as well as from the shore end (afterdisplacement of line content) through the sampling cock every thirtyminutes and subsequently hourly samples shall be taken and tested for Test
A (Appendix 2).
A.1.2.8.2 Sample should be clear, free of water and the density variation should bewithin + 0.003 at 15 C (in case of individual tanker tanks are having
different densities, then the sample shall have a density of within (+) 0.003of the highest and (-) 0.003 of the lowest density of the tanker tanks).
In case of deviation, pumping shall be stopped. The pumping shouldresume only after the reason has been established / corrective action taken.
Whenever pumping of the product is stopped and restarted, the procedure
and sampling should be followed as per clause A.1.2.8.1.
A.1.2.8.3 Two litres retention samples each shall be taken both from Jetty end andshore end for each grade, during Initial, Middle and Final stage ofdischarge and retained till quality of the product after receipt is established
(Appendix 3).
A.1.2.8.4 After discharge of each grade is completed, the product in the receipt tankshall be circulated by air blowing (wherever facilities are provided) till it is
homogenous.
A.1.2.8.5 After allowing sufficient settling time, upper and lower samples shall bedrawn from the receipt tanks and individually subjected to Test A
(Appendix 2). If this is satisfactory (density variation shall not be morethan +/- 0.003 between any two layers) a composite sample shall be send
sent to Lab for Test B i.e. batch formation test (Appendix 5).
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QUALITY CONTROL
GUIDELINES FORBASE OILS RECEIPTS,
STORAGE & HANDLING
Section A
Amendment No : 0Date : 01.06.2007
Page 4 of 8
If the results confoirm to respective base oils specification (Appendix1)
product may be released after assigning the batch no.
A.1.2.8.6 In the event, the sample after receipt does not meet the requiredspecification (Appendix-1), the concerned department shall be informed
immediately for further advice. The relevant pre-discharge samples andstorage tank composite sample (after receipt) shall be retained till
investigation is over (Appendix - 3)
A.1.2.8.7 All results and corrective action, if any, should be recorded chronologicallyin a separate register.
A.1.2.9 RECEIPT BY TANK TRUCK FROM OCEAN TANKER (whenever
necessary)
A.1.2.9.1 Ensure that the tank truck is clean and there is are no traces of product.
A.1.2.9.2 Mixed loading should not be done in a tank truck having common
manifold.
A.1.2.9.3 Each compartment of the tank truck should be properly sealed before
despatch.
A.1.2.9.4 On receiving tank truck at Installation, seal should be checked. Bottomsample from each and every compartment should be tested for Test A
(Appendix 2).
A.1.2.9.5 Sample should be clear, free of water and the density variation between the
compartments should be as per Clause No. A.1.2.8.2
A.1.2.9.6 Composite of bottom sample of each tank truck shall be retained till quality
after receipt is established.
A.1.2.9.7 While decanting tank trucks, due care should be taken to avoid intermixingof different grades.
A.1.2.9.8 After discharging tank trucks, refer Clause No. A.1.2.8.4 to A.1.2.8.7.
A.1.2.9.9 If the after receipt sample of storage tank fails, the individual TT sampleshall be tested for the failing characteristics/PD test and failing TT
identified, inform concerned department Supply Chain Management. Also
seek advice from P&AD dept. for disposal of product in the tank.
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QUALITY CONTROL
GUIDELINES FORBASE OILS RECEIPTS,
STORAGE & HANDLING
Section A
Amendment No : 0
Date : 01.06.2007
Page 5 of 8
A.1.3. RECEIPT BY TANK TRUCK (OTHER THAN FROM TANKER)
A.1.3.1 The seals of the tank trucks should be entered and seal nos. should be compared with
challan.
A.1.3.2 Each tank truck should be accompanied with a certificate giving the test result as perAppendix 5.
A.1.3.3 Refer Clause No. A.1.2.9.4 to A.1.2.9.6 but the density variation should be within
not be more than 0.003 as compared to despatch density.
A.1.3.4 A composite sample from max. 10 TTs of same grade shall be tested for Test E(Appendix4).
A.1.3.5 If the composite sample fails, the individual tank truck sample shall be checked forthe failing characteristics and failing tank truck isolated. Unloading may be done for
other tank trucks. The composite sample of failing TT (A.1.2.9.4) is to be retained
till investigation is over.
A.1.3.6 Refer clause A.1.2.9.7 to A.1.2.9.8
A.1.4 BATCH NO. FOR RECEIPT
A.1.4.1 After receipt of each product through ocean tanker / pipeline transfers / tank trucksinto a tank, a batch no. should be assigned on the basis of the batch formation test
report as per Appendix 5 For example e.g the batch no. HVI IN/BGB/8/4 wouldindicate that HVI IN is stored in Budge Budge Installation in tank no.8 as the 4
th
batch after tank cleaning.
Please check the current batch no. with JT and make corrections.
A.1.4.2 After every tank cleaning the batch no. shall revert to 1.
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QUALITY CONTROL
GUIDELINES FORBASE OILS RECEIPTS,
STORAGE & HANDLING
Section A
Amendment No : 0Date : 01.06.2007
Page 6 of 8
A.2 STORAGE
A.2.1 STORAGE TANK : FACILITIES
A.2.1.1 Above ground tanks with saucer bottom should have a minimum 25 mm diameter
water draw off line at the lowest portion of the tank..
A.2.1.2 Sampling cock should be provided at the manifold / inlet line before the valve to
draw the line sample.
A.2.1.3 Spool pieces, hammer blind valves or spectacle flanges/liners shall be provided in
the line whenever a common manifold and pipeline is used, for positive segregation.
A.2.1.4 Storage tank should be cleaned once in 5 years or more frequently depending on theneed, like change of product, sludge formation etc. However, with specific approval
of P&AD dept., cleaning of the tank may be extended for a period of two years. The
tank cleaning certificate shall be maintained.
Date of tank cleaning and the due date of next cleaning, name of product and tank
no. shall be painted on the manual cover of the storage tank.
A.2.1.5 Product shall be circulated (wherever facilities are provided) within the tanks every30 days for at least 2 hours when there is no fresh receipt in to the tanks during this
period
A.2.2 OTHER FACILITIES
A.2.2.1 All box strainers / line strainers shall be opened at least once in two months andinternally cleaned. The date on which the strainer had been last cleaned shall be
documented.
Cylinder Oil hoses should not be used for other oils.
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QUALITY CONTROL
GUIDELINES FOR
BASE OILS RECEIPTS,
STORAGE & HANDLING
Section A
Amendment No : 0
Date : 01.06.2007
Page 7 of 8
A.2.3 NUMBER CODING
A.2.4.1 Tanks and dedicated pipelines should be number coded for proper identification of
product.
A.2.3.1 Manifold : All pipelines connected to manifold should be marked with appropriate
number code.
A.2.3.2 A chart showing the legend of number code to be displayed at conspicuous places.
A.2.4.4 Number to be written in the direction of the flow and additionally an arrow mark
may be provided after each number code in the direction of the flow.
A.2.4 QUALITY MONITORING
A.2.4.1 When there is no fresh receipt for more than 6 months into a storage tank, UL
composite sample should be tested as per Test D (Appendix 2) before use.
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QUALITY CONTROL
GUIDELINES FORBASE OILS RECEIPTS,
STORAGE & HANDLING
Section A
Amendment No : 0Date : 01.06.2007
Page 8 of 8
A.3 DESPATCH
A.3.1 DESPATCH BY TANK TRUCK
A.3.1.1 Before filling, ensure that the tank truck is clean and there are no contents of
previous product.
A.3.1.2 Tank truck should be as far as possible put on one type of product. Mixed loading
should not be done in a tank truck having common manifold.
A.3.1.3 Ensure that the earlier line contents are completely removed whenever there is
grade changeover. The line contents can be put back in the respective product.
A.3.1.4 Before commencement of filling, a line sample should be drawn and tested for
Test A (Appendix 2)
A.3.1.5 The sample should be clear, free from water and the density variation should be
within 0.003 as compared to the respective despatch tank density.
A.3.1.6 After filling each tank truck, bottom sample shall be drawn from each and every
compartment of the tank truck, and tested separately for Test A (Appendix 2)
A.3.1.7 Refer clause A.3.1.5.
A.3.1.8 The relevant batch formation test report (Appendix 5) of the storage tank should besent along with the tank truck. If the density of individual compartments are not
the same or in case of variation as compared to batch test report, the same shouldalso be recorded separately either on the invoice or on the above test report.
A.3.1.9 An approximate of 750 ml. of comp. Samples drawn from each and every tank
should be retained till the product is accepted by the receiving location
A.3.1.10 All compartments should be sealed and seal nos. should be recorded on the
invoice.
A.3.1.11 Quality of product during transit shall be the responsibility of the transporter and it
should be clearly spelt out in the contract guidelines.
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A.3.3.2 If the pipeline is dedicated or when there is no grade change over, the base oil can
be directly charged in to the blending tank.
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SECTION
E
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APPENDIX - 2
QUALITY CONTROL
CHECKS
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QUALITY CONTROL
GUIDELINES FORBASE OILS RECEIPTS,
STORAGE & HANDLING
QUALITY CONTROL CHECKS
Appendix2
Amendment No : 0
Date : 01.06.2007
Page : 1 of 2
Sl. No. TestCategory
Checks/Tests Applicable to
1) A Appearance
Colour (Visual/ASTM)
Water (Visual/crackle test)
Density at 15 C/ 29.5 C
Base Oil
Finished Product
2) B Batch Formation tests (APPENDIX pp. 5) Base Oil
3) C AppearanceWater (Visual/crackle test)
Base Oil
4) D Appearance Tests to monitor quality if the product is
not used for 6 monthsColour (ASTM)
Water (crackle test)
Density at 15 C / 29.5 C
K.V. at 40 C
K.V. at 100 C
Viscosity Index (VI)
Additionally for finished productmetals and
phosphorus for gear oil blend control tests as per
Master Receipe for finished product
Base Oil
Finished product
5) E Pre-discharge tests (APPENDIX pp.4) Base Oil
6)
7)8)
9)
documented and supported by written confirmation from P & AD.
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APPENDIX - 3
TESTING AND
RETENTION OFSAMPLES
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QUALITY CONTROL GUIDELINES FOR
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STORAGE & HANDLING
TESTING AND RETENTION OF SAMPLES
Appendix
3Amendment No : 0
Date : 01.06.2007
Page : 1 of 7
SL.
NO.
EVENT/
ACTIVITIES
SOURCE OF
SAMPLE
TYPE OF
SAMPLE
TESTING RETENTION
TESTS
REQUIRED
QCM (L)
REF.
CLAUSE
NO.
RETENTION
PERIOD
QCM (L)
REF.
CLAUSE
NO.
A. BASE OIL
1)
Before receipt
through Oceantanker
Tanks
nominated forreceipt
UL Composite ----- -----Till batch
established
A.1.1.1 /
A.1.1.3
2)
Before receipt
through Ocean
tanker
Load port shore
tanker and tanker
tank
As available in
Ship----- -----
Till
established
A.1.2.5
3)
Before receipt
through ocean
tanker
Individual tanker
tank
All levelTest A
(App. 2)A.1.2.6
If hails, till
investigation
is over
A.1.2.7.2
BottomTest C
(App.2)----- -----
Comp. of all
level
Test C
(App.4)A.1.2.7.1
Till batch
establishedA.1.2.7.1
If fails, till
investigation
is over
A.1.2.7.2
4)During Tanker
discharge
Jetty end &
shore endLive sample
Test A
(App.2)A.1.2.8.1 -----
-----
5) Initial, Middle &Final stage of
discharge
Jetty end &shore end
Live sample - --- ----- Till batch isestablished
A.1.2.8.3
6)
Before r Receipt
by TT (from
ocean tanker/
stock
transfer/other
company)
Tank truck
BottomTest A
(App.2)A.1.2.9.4 -----
A.1.2.9.4 --
-----
Composite ----- A.1.4.3Till batch is
established
A.1.4.3
A.1.2.9.6
7)
- -Receipt by
TT (other than
from ocean
tanker)
Tank truck
BottomTest A
(App.2)A.1.4.3 ---- ----
Composite ------
Composite . of
Wax 10 TTs
Test E
(App.42)
A.1.2.9.6
A.1.4.3 4----- -----
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QUALITY CONTROL GUIDELINES
FOR
BASE OILS RECEIPTS,
STORAGE & HANDLING
TESTING AND RETENTION OF SAMPLES
Appendix 3
Amendment No : 0
Date :
01.06.2007
Page : 2 of 7
8Receipt by TT (other
than from ocean
tanker)- -
If fails, failingTT
Composite ----- -----
Till
investigation is
over
A.1.2.9.7-A.1.4.5 3
9
Before receipt of PLT
Despatch tank
Upper &
Lower
Test A
(App.2)Test A
(App.2)
A.1.3.5
-----A.1.3.5
Till batch is
established A.1.1.2 /
A.1.1.3
Composite Test E (App.4)A.1.3.5
----------
Receipt tank UL Composite Test E (App.4) A.1.3.5Till batch is
established
A.1.1.2 /
A.1.1.3
TESTS REQUIRED
QCM (L)REF.
CLAUSE
NO.
RETENTION
PERIOD
QCM (L)REF.
CLAUSE
NO.
10During PLT
Despatch &
receiver endLine sample Test A (App.2) A.1.3.6 ----- -----
11 Initial, Middle & Final
stage of transfer
- -Despatch
& receiver end
Line sample-
------ -----
Till batch is
establishedA.1.3.6
12 After receipt ExTanker/PLT/TT
Storage tank
Upper &
LowerTest A (App.2)
A.2.8.5;
A.1.2.9.98;A.1.3.6;
A.1.4.3.6
-----
If fails, tillinvestigation is
over
A.1.2.8.6
A.1.2.9.89
UL Composite Test B (App.5)A.1.3.6A.1.4.63
13No fresh receipt formore than 6 months
Storage tank UL Composite Test D (App.20 A.2.5.1 ----- -----
14 Before TT filling Delivery line Line sample Test A (App.2) A.3.1.4 ----- -----
15 After TT filling Tank truckBottom Test A (App.2) A.3.1.6 ----- -----
Composite ----- ----- Till accepted A.3.1.9
16 Withdrawal of BaseOil
Pipeline Line sample Test A (App.2) A.3.3.32 ----- -----
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APPENDIX4
PRE-DISCHARGE
TESTS
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QUALITY CONTROLGUIDELINES FOR
BASE OILS RECEIPTS,
STORAGE & HANDLING
PRE-DISCHARGE TESTS
Appendix - 4Amendment No : 0
Date : 01.06.2007
Page : 1 of 1
PRODUCT TESTS
BASE OIL 1) Appearance
2) Colour (ASTM)
3) Water (Crackle Test/Water content)4) Density at 15 C
5) Kinematic Viscosity (KV) at 40 C
6) Kinematic Viscosity (KV) at 100 C
7) Viscosity Index (VI)
8) Flash Point (COC)
9) Pour Point
10) Emulsion characteristics (For Turbine Base Oil
Group II 150 Nt & 500 Nt)
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APPENDIX
5
BATCH FORMATION
TEST
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QUALITY CONTROLGUIDELINES FOR
BASE OILS RECEIPTS,
STORAGE & HANDLING
BATCH FORMATION TEST
Appendix 5
Amendment No : 0
Date : 01.06. 2007
Page : 1 of 1
PRODUCT TESTS
BASE OIL 1) Appearance
2) Colour (ASTM)
3) Water (Crackle Test/Water content)4) Density at 15 C
5) Kinematic Viscosity (KV) at 40 C
6) Kinematic Viscosity (KV) at 100 C
7) Viscosity Index (VI)
8) Flash Point (COC)
9) Pour Point
Additionally following tests are to be carried out for
Turbine / Group II Base Oil
i) Emulsion characteristics
ii) Foaming, all 3 Sequences
vi)iii) Sulphur ContentSulphur content
iv) Aromatic Content *
*: To be tested at R & D
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APPENDIX9
SLOP REGISTER
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BHARAT PETROLEUM CORPORATION LIMITED
QUALITY CONTROL MANUAL
LUBRICANTS
APPENDIX - 9
SLOP REGISTER
Date Slop
generated
from
Slop
quantity
Disposed
off into
Quantity of
finished
product
Remarks Signature
Currently slop generated is recorded
Do you want a daily / weekly or monthly record ?
What is the purpose of this record if it is maintained in SAP. Please check up with JT
and decide whether this record is required separately, and it should be maintained at
what frequency ?
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APPENDIX
10
RECORD OF
SAMPLESRETAINED/
DESTROYED
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BHARAT PETROLEUM CORPORATION
LIMITED
QUALITY CONTROL MANUAL
LUBRICANTS
APPENDIX - 10
RECORD OF SAMPLES
RETAINED/DESTROYED
OCATION :
.
Dt. Of
sampling
Source Produc
t
Purpos
e
Sample
drawn
by
Signatur
e
Sample
retained
upto
(Date)
Signatur
e
B. 1) Source means tanker / TT / Storage tank / TT Loading or Unloading Line/ Blending/Filling Line/Barrel/Small Pack etc.
2) Purpose : Refer Appendix 3
my opinion, this record is not required since it will be an additional work load for labs.
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ase include Zn content and total metals, wherever applicable since the same is being tested at present. Also discuss with JT & find out how it is
intained in SAP.his batch sample test report ? If so, it is already maintained batchwise in SAP. Please discuss with JT. In my opinion, no separate manual record is
uired, since it is already maintained in SAP.Please include Zn content & Total Metal Factor (TMF), emulsion & foaming parameter also since the same is
ng tested currently for some grades.
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QUALITY CONTROL GUIDELINES FOR
BASE OILS RECEIPTS,
STORAGE & HANDLING
GLOSSARY OF TERMS
Appendix 16
Amendment No : 0
Date : 01.06.2007
Page : 1 of 1
Dedicated PipelineTotally segregated pipeline ( with no cross over connections, flange connections or any other
connection with any other pipeline), used by and organisation to transfer a single grade of
petroleum products from their refinery to their storage tanks for distribution.
Multiproduct PipelineA common line used for transferring different grades of petroleum products
Sampling Aids
Weighted sampling canMetal sampling apparatus of such weight as to sink readily in the product to be sampled. The
apparatus shall be provided with means to permit filling at any desired level and shall have
attached a non sparking chain or cord. Metal used to weight the apparatus shall be fitted
externally at the bottom or content in an oil tight false bottom since irregularities in the metal
may retain material which will contaminate the sample if the weight is fitted in the interior.
Sampling cageA metal holder or cage suitably constructed to hold a appropriate bottles or cans. The
combined apparatus shall be of such weights as to sink readily in the product to be sampled
and provision shall be made to permit filling the bottle or can at any desired level.
Sampling ThiefThis is a metal sampling apparatus with an opening at the bottom and is actuated when the
apparatus comes to rest on the tank bottom.
Sampling cockFitted on the pipeline by opening of which the pipeline contents can be drawn out.
Composite sampleA sample taken by combining representative sample of a product from a number of
containers, for e.g individual ship tanks or package, in amounts proportional to the contents of
each of the containers sample.
Top sampleSample taken with the aid of sample thief from the lowest part of the tank / sample collected
from sampling cock at the bottom of the pipeline if not otherwise specified. This sample is
usually taken to check the presence of extraneous matter such as water sediment etc.
Upper sampleAn upper sample is one taken at a level of 1/6 of the depth of product below the top surface in
a tank.
Lower sample
One taken at a level of 5/6 of the depth of product below the top surface in a tank.All level sampleA sample obtained by submerging a closed sampler to a point as near as possible to the drawn
off level, then opening the sampler and raising it at a uniform rate such that it is nearly but not
quite full as it emerges from the liquid.