pipenet detailed

PIPENETTM - Leading the Way in Fluid Flow Analysis

SUNRISE SYSTEMS LIMITED

Flint BridgeBusiness CentreEly RoadWaterbeach Cambridge CB5 9QZUnited Kingdom

Tel.: +44 1223 441311Fax:+44 1223 441297

E-mail:pipenet@sunrise-sys.com

Web:www.sunrise-sys.com

SUNRISE SYSTEMSPIPENET VISION

DETAILED DEMONSTRATION AND

DISCUSSION OF APPLICATIONS

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TRANSIENT MODULE APPLICATIONS

• Transient Analysis of Pipelines

• Firewater Systems

• Water Injection Systems

• Cooling Water Systems

• Loading and Unloading Systems

• Generating Loads for Pipe Stress Analysis

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TRANSIENT MODULE APPLICATIONSURGE ANALYSIS OF A LARGE COOLING WATER

SYSTEMNANHAI PETROCHEMICAL PLANT, CHINA

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KEY POINTS

• One of the Biggest Petrochemical Plants• Main Header Is 2.0 M Diameter• Plant Has 4 Systems in Parallel• Cooling Water System Uses GRP• Open System With Cooling Tower• Slow Valve Closure Necessary – 240 Sec• Severe Oscillations After Valve

• Valve Closure Scenario• Pump Trip Scenario

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OBJECTIVES

• Reduce Oscillations To Less Than 1 Bar

• Keep Pressure Surge to Less Than 8 Barg

• Optimise Valve Closure Time

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• Downstream pressure with 240 sec closure

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• Downstream pressure with 40 sec closure

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• Pressure Range with 240 Sec Valve Closure

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• Pressure Range with 60 Sec Valve Closure

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CONCLUSIONS

• Pressure Range Is Below 1 Bar

• Maximum Pressure Is Below 8 Barg

• 240 Sec Valve Closure Time Is Necessary

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TRANSIENT MODULE APPLICATION OFFSHORE FIREWATER SYSTEM

NOWROOZ OFFSHORE PLATFORM COMPLEX, IRAN

Fire pump 20-P-4510B

20-A-4502

NPP2 Platform

NLQ Platform

20-A-4503

20-A-4504

Weather deck

Closed

Vac Brkr

Runs constantly

Caisson modelled as pipe

Monitor closes5 - 10 secs

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KEY POINTS

• Operator Is Shell, In Offshore Iran

• Two Sister Platform Complexes – Soroosh (3 Platforms) And Nowrooz (2 Platforms)

• The Firewater Ringmain Is Made Of GRP Pipes

• Pressure Controlled Deluge Valves Were Used

• Bridge Connection Between The Platforms. (So There Is Large Volume)

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OBJECTIVES

• To calculate the maximum pressure surges and check if they are within the limit – deluge valve closure, deluge valve opening and pump trip

• Check the need for vacuum breakers, their position and sizes

• Check stability of the control valve

• Calculate hydraulic transient forces for pipe stress analysis, and positioning pipe supports.

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POINTS OF SPECIAL INTEREST

• Elevation Changes in Offshore Platforms often cause large pressure surges due to cavity formation. Vacuum breakers are used to eliminate them.

• In this system, the large capacity of the bridge connection between the platforms combined with the elasticity of GRP material was instrumental in reducing the pressure surge. GRP is generally thought to be bad for pressure surge but in this case it was good.

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TRANSIENT MODULE APPLICATION SUBSEA PIPELINE SYSTEM – ARABIAN GULF

ZADCO, ABU DHABI

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ZADCO, ABU DHABI

KEY POINTS

• 35 Km Pipeline Transporting Oil From Platform To Tank Farm

• Two Specific Problems– Pipeline Is 25 Years Old And Is Corroded– Water Cut In Oil Is High – Less Compressible –

High Pressure Surge

• Feasibility Analysis Of Leak Detection System

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ZADCO, ABU DHABI

OBJECTIVES

• Determine The Valve Closure Time For Maximum Pressure Of Closed Head Pressure Of Pump Plus 5 Barg

• Determine The Volume Of Oil Leakage With And Without Leak Detection System

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ZADCO, ABU DHABI

• VALVE CLOSURE TIME OF 60 SEC

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ZADCO, ABU DHABI

VALVE CLOSURE TIME – 600 SEC LINEAR

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ZADCO, ABU DHABI

VALVE CLOSURE TIME – 600 SEC QUADRATIC

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ZADCO, ABU DHABI

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ZADCO, ABU DHABI

CONCLUSION

The shut off valve must be closed no faster than 600 sec in quadratic mode

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TRANSIENT MODULE APPLICATION JETTY LOADING SYSTEM

ENGINEERING COMPANY, KOREA

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KEY POINTS

• 5700 M Pipeline From Refinery to Ship

• Carrying Lube Oil

• Maximum Pressure Is Limited to 15 Barg

• Environmental Considerations Are Crucial

• Planned Shut Down As Well As Emergency Shut Down Need to Considered

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OBJECTIVES

• To reduce the maximum pressure to 15 barg.• Consider alternative strategies for reducing the

pressure surge.• Determine the best position for the surge relief device• Calculate the forces on the expansion loop• Optimise the size of surge relief valve

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ALTERNATIVE STRATEGIES

• Two Stage Valve Closure

• Use Surge Relief Valve

• Use Accumulator

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25 Sec Linear Valve Closure

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USE OF SURGE RELIEF VALVE

Pipeline

Sh ut off valve

ERC valve

Pe trochemical plant

Tanker(C loses)

(Remains open)

Su rge Relief Valve

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SURGE RELIEF VALVE, CV = 200 (M3/HR, BAR)

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SURGE RELIEF VALVE, CV = 100 (M3/HR, BAR)

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SURGE RELIEF VALVE, CV = 25 (M3/Hr, BAR)

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SURGE RELIEF VALVE, CV = 10 (M3/Hr, BAR)

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POSITIONING OF SURGE RELIEF VALVE, CV = 100 (M3/Hr, BAR)

Pipeline

Shut off valve

ERC valve

JettyPetrochemical plant

Tanker(Closes)

(Remains open)

Surge Relief Valve

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POSITIONING OF SURGE RELIEF VALVE, CV = 100 (M3/Hr, BAR)

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TWO STAGE VALVE CLOSURE – NO SURGE RELIEF VALVE

Pipeline

Sh ut off valve

ERC valve

Jet ty

Pe trochemical plant

Tanker(Closes)

(Remains op en)

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TWO STAGE VALVE CLOSURE – SLOW SECOND STAGE

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TWO STAGE VALVE CLOSURE – FAST SECOND STAGE

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SINGLE STAGE VALVE CLOSURE – WITH ACCUMULATOR

Pipeline

Shut off valve

ERC valve

Petrochemical plant

Tanker(Closes)

(Remains open)

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SINGLE STAGE VALVE CLOSURE – WITH ACCUMULATORDiameter = 1.0 m, height = 15 m

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SINGLE STAGE VALVE CLOSURE – WITH ACCUMULATORDiameter = 0.5 m, height = 10 m

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FORCE CALCULATION AT AN EXPANSION LOOP

PipelineShut off valve

ERC valve

Petrochemical plant

Tanker(Closes)

(Remains open)

EXPANSION LOOP

100M10M

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TRANSIENT MODULE APPLICATION RAS LAFFAN COMMON COOLING WATER SYSTEM

QATAR PETROLEUM

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QATAR PETROLEUM

KEY POINTS 1• Most complex cooling water system ever

designed• Made of GRP material• Main header size in Phase 1 of the project was

3.5 m diameter• Main header size in Phase 2 of the project was

4.5 m diameter• The system has 9 variable speed pumps with

pressure control (7 lead, 2 stand by)• The system (Phase 1) has 190 vacuum breakers

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QATAR PETROLEUM

KEY POINTS 2• Each pump had a capacity of some 48,000

m3/hr, making a total of 336,000 m3/hr• There were flow control valves in the system• The allowable working pressure had a very

narrow range.– Minimum pressure = -0.3 barg– Maximum pressure = 6.0 barg

• The system has two receiving basins to stop air flowing back into the system if the pumps tripped

• PIPENET was specified for the project by Qatar Petroleum.

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QATAR PETROLEUM

OBJECTIVES

• To size the receiving basins• To select the vacuum breakers and ensure their

adequacy• To check the stability of the control systems• The users were plants operated by other

companies. It was necessary to guarantee availability of water.

• Optimise the control systems in order to minimise power consumption

• Safe operation under pump trip and valve closure events.

Tel.: +44 1223 441311Fax:+44 1223 441297

TRANSIENT MODULE APPLICATION RAS LAFFAN COMMON COOLING WATER SYSTEM, QP

ZOOMED VIEW 1

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ZOOMED VIEW 2

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TRANSIENT MODULE APPLICATIONFIREWATER RINGMAIN SYSTEM TRANSIENT ANALYSIS

EASTERN BECHTEL CO. LTD.

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EASTERN BECHTEL CO. LTD.ZOOMED VIEW 1

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EASTERN BECHTEL CO. LTD.ZOOMED VIEW 2

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EASTERN BECHTEL CO. LTD.

KEY POINTS• Liquefied Natural Gas Plant (LNG)• GASCO, Abu Dhabi• Mixture of Carbon steel, Lined/Unlined and

GRP• Complicated bypass valve arrangement• Pump Startup with no system running• Pump startup with the largest system

running• Pump trip

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EASTERN BECHTEL CO. LTD.Monitor Valve Closing Case

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SPRAY/SPRINKLER MODULE APPLICATIONS

• Deluge systems

• Firewater ring mains

• Foam solution systems

• Sprinkler systems

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SPRAY/SPRINKLER MODULE APPLICATION REFINERY FIREWATER RINGMAIN SYSTEM

M W KELLOGG, UNITED KINGDOM

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SPRAY/SPRINKLER MODULE APPLICATION REFINERY FIREWATER RINGMAIN SYSTEM

ZOOMED VIEW

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SPRAY/SPRINKLER MODULE APPLICATIONAIRPORT HANGAR DELUGE SYSTEM

SINGAPORE INTERNATIONAL AIRPORT

891 PIPES730 NOZZLES

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SPRAY/SPRINKLER MODULE APPLICATIONAIRPORT HANGAR FIREWATER SYSTEM

ZOOMED VIEW

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SPRAY/SPRINKLER MODULE APPLICATIONOFFSHORE PLATFORM COMPLEX FIREWATER

SYSTEMDANF PLATFORMS, DENMARK

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SPRAY/SPRINKLER MODULE APPLICATIONOFFSHORE PLATFORM COMPLEX FIREWATER

SYSTEMZOOMED VIEW

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STANDARD MODULE APPLICATIONS

• Cooling Water Systems

• Steam Distribution Systems

• Ventilation Systems

• Compressed Air Systems

• Seawater Systems

• Closed Loop Systems

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STANDARD MODULE APPLICATIONREFINERY STEAM DISTRIBUTION SYSTEM

RELIANCE INDUSTRIES, INDIA

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ZOOMED VIEW 1

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ZOOMED VIEW 2

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STANDARD MODULE APPLICATIONPLANT COOLING WATER SYSTEM

QATAR PETROLEUM

Tel.: +44 1223 441311Fax:+44 1223 441297

STANDARD MODULE APPLICATIONPLANT COOLING WATER SYSTEM, QP

ZOOMED VIEW 1

Tel.: +44 1223 441311Fax:+44 1223 441297

STANDARD MODULE APPLICATIONPLANT COOLING WATER SYSTEM, QP

ZOOMED VIEW 2

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STANDARD MODULE APPLICATIONPLANT WATER DISTRIBUTION SYSTEM

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STANDARD MODULE APPLICATIONPLANT WATER DISTRIBUTION SYSTEM

ZOOMED VIEW

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DIFFERENCES BETWEEN PIPENET AND TWO-PHASE FLOW PROGRAMS

ITEM PIPENET TWO-PHASE FLOW

Thermodynamics Simple Complex

Network Complex Simple

Main Systems Utility systems, firewater systems, surge analysis

Two-phase flow pipelines, process lines

Main applications Steady state (Design), Transient state (Analysis)

Steady State

Priority 1 Fast input of complex networks

Good thermodynamics

Priority 2 Fast calculations and reliable results

Reliable results

pipenet detailed

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