Long term experience with polypropylene thermal insulation ...( Presentations/Long Term... · Long...

www.bhrgroup.co.uk

18th International Conference onPIPELINE PROTECTION

Antwerp, Belgium; 4 - 6 November 2009

Long term experience withpolypropylene thermalinsulation on subsea pipelines

Contents•Introduction

• Why insulate

•Use of Polypropylene Foam Insulation

•Qualification

•Application

•Installation

•Operation

•Conclusions

Functional requirements for thermalinsulationProvide corrosion protection for thelifetime of the coated steel flowline

Provide the required thermal insulation(U-value) for the lifetime of the flowline

Hydratetemp.

No insulation New insulation

Exposed insulation

Time to hydrate formation

Pipe steel types that have been insulated

Carbon steelSMSS (super martensittic stainless steel) 13 % CrCarbon steel with stainless steel liner (Bubi)Clad steel (carbon steel with metallurgicallybonded stainless steel liner)Duplex stainless steels

Field joint typesField joint type When used Parent coatingInjection mouldedpolypropylene

Reeling / S-lay /onshore / offshoretie-in

Polypropylene foam

Flame spray polypropylenewith polypropylene halfshells

Offshore tie-inand field joints

Polypropylene foam

Solid polyurethane S-lay / Stalk tie in(reeling)

Polypropylene (lowtemperatureapplications)Polyurethane

Anode attachement – for cathodic protectionand direct electric heating (DEH)

Five layer polypropylene foam system

Steel pipe: 228.6 mm OD x 11.6mm x 13% Cr

High temperature Fusion Bonded Epoxy

Polypropylene Outer Shield

Polypropylene Foam

Solid Polypropylene

Polypropylene high temperature Adhesive

Polypropylene foam insulated pipelines inStatoil

Feature Ranges

First installation 1991

Length installed 784 000 m

Diameters insulated 200 – 500 mm / 8-20 “

Water depths 82 - 390 m

Design temperatures 65 – 155 oC

U-values 3 – 8 (W/m2K)

Highest thickness 78.3 mm

Installation methods S-lay and reeling

Installed pipelines with polypropylene foaminsulation in Statoil

100000

200000

300000

400000

500000

600000

700000

800000

900000

1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010

Design temperatures for the subseaflowlines

1990 1995 2000 2005 2010

)Kristin

Water depth of installed pipelines

1990 1995 2000 2005 2010

U-values ( W/m2K) or coating thickness

1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010

U-values for some of the flowlines

1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010

Insulation application discrepancies

Density outside the required specificationEccentric placement of steel pipe in foamLack of bond between the three-layer coating andinsulationCracking of external weight coatingIrregular outer surface from unstable processconditionsCracking of factory coating due to less flexible FBECracking of factory coating and PP field jointCracking in coating at the spool base due to rollerboxing

High temperature qualification – 155 C

-A temperature – time profile for theproduction from the reservoirs

-The flowlines were used as heat sinks tolower the well stream temperature toacceptable 132 oC for the risers andproduction facilities

-A close to solid PP insulation system

-Flow assurance based on direct electricheating (DEH)

-Special attention to anode connections tokeep water away from SMSS surface

Field joints and installation

Cracks in injection moulded polypropylenefield jointsCracks in tie-in joints both injection mouldedpolypropylene and polyurethaneCracks in the parent insulation materialBuckling of steel pipes in field joints due tostrain concentration associated with thecoatingCracks in connection with anode brackets

In-service experience – hydrogen cracking

In-service experience – polyurethane fieldjoints

Flame spray polypropylene

Key to successful projects

Direct involvement of own personnel with the pipecoater, i.e. increased internal knowledge baseQuality issues has been solved between pipecoaters and end userAll technical discussions has been solved betweenthe end user and pipe coaterHigh quality of the final deliveries

Conclusions

PP based foam has been the base case formost pipeline projects with insulationrequirements since the first installation in 1991

The system was further developed and qualifiedfor high temperature applications through anactive involvement with the coating systemsupplier

The in-service operational experience afterinstallation has been excellent.

Long term experience withpolypropylene thermal insulation onsubsea pipelines

Bjørn Melve, Dana Ali, Harald Thon,Kristian Haraldsen

Statoil ASA, Norway www.statoil.com dal@statoil.com, bjme@statoil.com,hatho@statoil.com, krihar@statoil.com

Long term experience with polypropylene thermal insulation ...( Presentations/Long Term... · Long...

Documents

Long Glass Fiber-Polypropylene Light Weight …v Long Glass Fiber-Polypropylene Light Weight Instrument Panel Retainers & Door Modules Matthew Marks September 16-18 2008 SPE-Automotive

Long-term creep behavior of polypropylene/fumed silica ... · Abstract Nonlinear viscoelastic creep was studied on polypropylene/fumed silica nanocomposites. The free-volume theory

UK Insurance & Long-term Savings Key Facts · UK Insurance & Long-term Savings Key Facts. 4 abi.org.uk ... 19 Long-term savings and life statistics ... insurance & long-term savings

The Use of Lightweight, Large-Pore Polypropylene Mesh ... · PDF fileBiologic meshes are . often used in this setting; however, these meshes lack the long-term durability of permanent,

Transient Rheology of a Polypropylene Melt Reinforced with Long · PDF fileTransient Rheology of a Polypropylene Melt Reinforced with Long Glass Fibers Ortman, K.C.1, Neeraj Agarwal1,

Long-term stability of bevacizumab repackaged in 1mL polypropylene

Long Term Unsecured Loans @ Cash assistance for long term

Long-Term Cement Outlook · Long-Term Cement Outlook . Overview . PCA provides long-term assessments regarding cement consumption and sourcing in an effort to support long-term capital

AARP’s Long-Term Care Ads and Long-Term Care Messaging

TABLE OF CONTENTS...Long-term portion of deferred revenue 56,276 61,513 Long-term debt 344,766 644,369 Other long-term liabilities 77,084 81,232 Total long-term liabilities 478,126

Electical Characteristics Of Metallized Polypropylene Film ... · term thermal durability and electric current resista. nce, using the film as dielectric. Structure of polypropylene

Long-Term Debt Financing - · PDF file18 Long-Term Debt Financing Multinational corporations (MNCs) typically use long-term sources of funds to finance long-term projects. They have

Municipal Long Term Borrowing Policy - Drakensburg · MUNICIPAL LONG TERM BORROWING ... Means any long-term agreement, lease, ... The Municipality may incur long-term debt for purposes

Guide to Long-Term Care Insurance - AHIP · costs associated with long-term care and how long-term care insurance may help protect you. What is long-term care? Long-term care is a

Long-term disability insurance from Aetna · Long-term disability insurance from Aetna CCSF 2 (08/15) About long-term disability insurance. Long-term disability insurance, or LTD,

Long-Term Financing. Basics of Long-Term Financing

SOURCES OF LONG TERM FINANCE & RAISING LONG TERM FINANCE

Long-term FX hedging, speculative or strategic? · Long-term FX hedging, speculative or strategic? Is long-term FX hedging speculative? Or are businesses finally recognising long-term

Approve Long Term Financial Projection (LTFP) of Long Term Financial Projection... · 2 I. Introduction: Purpose of the Long Term Financial Projection . This updated Long Term Financial

Long-Term Care Insurance in Japan - OLIS · •Public Long-Term Care Insurance •Private Long-Term Care Insurance •Private Long-Term Care Business 7. Certified Ratio of Long-Term