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We have a proven reputation for the supplyof complete pipe-in-pipe systems for flow assuranceapplications From our pipe mills in the North East

of England we can deliver completed insulatedassemblies ready for offshore installation

Larger subsea tiebacks often require insulation

to ensure that fluid flow is maintained along

the pipeline Tata Steel has supplied more than

200km of insulated pipeline using an injected

PU foam insulation system Constructed pipe

joints benefit from the closest dimensional

tolerances ndash delivering reliable performance

and enabling rapid offshore lay using half

shell field joints

The pipe-in-pipe insulation plant is housed

within our pipe mill complex situated close

to the deepwater port of Hartlepool ndash enabling

direct supply of pre-assembled pipe joints ready

for offshore S-Lay In addition to pipe-in-pipe

assembly Tata Steel also supplies components

to complete the line These include intermediate

bulkheads waterstops and field joint materials

Our complete pipe-in-pipe system includes

bull Inner pipe ndash from our own mills or other

quality assured subcontractors

bull HFI outer pipe ndash cut to match inner pipe

lengths and optimise pipe yields

bull Outer pipe bevelling and coating (PPPE)

bull Injected PU foam insulation

bull Installation and TIG welding of outer pipe

backing ring

bull Field joint materials and waterstop bulkheads

Advantages of our pipe-in-pipe offering includes

bull Tight control on inner to outer pipe concentricity

(within 2mm) and inner pipe stick-out

(05mm-0mm) ndash for faster t up and welding

bull Overall heat transfer coecients of lt07 WmK

bull Axial load transfer to minimise upheaval buckling

bull Load transfer between inner and outer pipes ndash

ensuring suitability for S-Lay

bull Single supplier for ease of contract management

Polyurethane (PU) Foam Pipe-in-Pipe System

Flow Assurance

Annular gap versus inner pipe outside diameter capabilities of PU foam pipe-in-pipe

A n n u l a r g a p

Inner pipe outside diameter (inches)

U = 1 Wm983090K

U = 075 Wm983090K

U = 05 Wm983090K

10 12 14 16 18 20

( m m )

( i n c h e s )

2

4

3

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Inner pipe

Pipe measurement

Blast cleaning

Integration of

outer amp inner pipes

Outer pipe

Cut to match

inner pipe lengths

Pipe coating

Centralise inner pipe amp fit bulkheads Foam injection into annulus

End bevelling of outer pipe

(reference inner pipe bore)

TIG weld backing ring Inspectionmeasurement

of concentricity

Removal of bulkheads

Polyurethane foam pipe-in-pipe mill process route

wwwtatasteelcom

English Language TST33250UK112011

Tata Steel

PO Box 101 Weldon Road Corby NorthantsNN17 5UA United Kingdom

T +44 (0) 1536 404261 F +44 (0) 1536 404095

energyprojectstatasteelcom wwwtatasteelenergycom

While care has been taken to ensure that the information contained in this publication

is accurate neither Tata Steel Europe Limited nor its subsidiaries accept responsibilityor liability for errors or for information which is found to be misleading

Copyright 2011

Tata Steel Europe Limited

Track record for polyurethane foam pipe-in-pipe systems

Year Operator Project name Length Pipe sizes Design temperature U Value Insulation Lay method

Outer Inner Pipeline Field joint

2006 Shell Starling 34kms 20 OD 12 OD 110degC lt07 Wm983090K PU Foam Mineral wool S-Lay2005 Talisman Tweedsmuir Main line 53kms 18 OD 12 OD 120degC lt08 Wm983090K PU Foam Mineral wool S-Lay

2005 Talisman Tweedsmuir South line 5kms 14 OD 8 OD 125degC lt08 Wm983090K PU Foam Mineral wool S-Lay

2004 BP Rhum 45kms 22 OD 16 OD 110degC lt10 Wm983090K PU Foam Mineral wool S-Lay

8122019 Polyurethane Foam Pipe in Pipe

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Inner pipe

Pipe measurement

Blast cleaning

Integration of

outer amp inner pipes

Outer pipe

Cut to match

inner pipe lengths

Pipe coating

Centralise inner pipe amp fit bulkheads Foam injection into annulus

End bevelling of outer pipe

(reference inner pipe bore)

TIG weld backing ring Inspectionmeasurement

of concentricity

Removal of bulkheads

Polyurethane foam pipe-in-pipe mill process route

wwwtatasteelcom

English Language TST33250UK112011

Tata Steel

PO Box 101 Weldon Road Corby NorthantsNN17 5UA United Kingdom

T +44 (0) 1536 404261 F +44 (0) 1536 404095

energyprojectstatasteelcom wwwtatasteelenergycom

While care has been taken to ensure that the information contained in this publication

is accurate neither Tata Steel Europe Limited nor its subsidiaries accept responsibilityor liability for errors or for information which is found to be misleading

Copyright 2011

Tata Steel Europe Limited

Track record for polyurethane foam pipe-in-pipe systems

Year Operator Project name Length Pipe sizes Design temperature U Value Insulation Lay method

Outer Inner Pipeline Field joint

2006 Shell Starling 34kms 20 OD 12 OD 110degC lt07 Wm983090K PU Foam Mineral wool S-Lay2005 Talisman Tweedsmuir Main line 53kms 18 OD 12 OD 120degC lt08 Wm983090K PU Foam Mineral wool S-Lay

2005 Talisman Tweedsmuir South line 5kms 14 OD 8 OD 125degC lt08 Wm983090K PU Foam Mineral wool S-Lay

2004 BP Rhum 45kms 22 OD 16 OD 110degC lt10 Wm983090K PU Foam Mineral wool S-Lay