SPO Compact Flange also suitable for LNG - Valve · PDF fileVerified for HISC to DNV-RP-F112...

Copyright © 2013 Freudenberg Oil & Gas Technologies

Tor EriksenFreudenberg Oil & Gas Technologies

SPO® Compact Flangealso suitable for LNG

Slide 2Copyright © 2013 Freudenberg Oil & Gas Technologies

Static pipeline connection

Two independent pressure retaining seals

Environmental seal (non pressure retaining)

Designed to be used in temperatures

ranging from -200ºC to 720ºC

Suitable for high pressure (up to 20,000psi)

One seal ring size for each nominal pipe

size

Can be used as well for subsea applications

Class 150

Class 600

Class 300

Class 900

Class 1500Class 2500

1 Seal ring

SPO® Compact Flange


We achieved our target in 1989 and the first SPO Compact Flanges were used in 1989 on Saga Petroleum’s 2/4-14 riser.

SPO CF was chosen for the Snorre TLP Production and Export riser. Delivery started in 1991 (~1100 flanges).

SPO CF designed and deliveredtitanium flanges for the Heidrun Drilling riser in 1994.

SPO CF standard completed in 1996.

SPO CF was chosen as the NORSOK compact flange standard in 2001.

The History of SPO Compact Flange

SPO® Compact Flange – how to succeed


Positive experience with the SPO CF

Never an operational leakage developed from more than 500,000 flange-years of operation mainly due to 100% static sealing conditions.Substantial weight and space savings: WN flange joints are typically 60 – 70% lighter than corresponding ASME flange joints

Load capacity and point of leakage will normally exceed the load capacity of the adjoining pipe.

Designed to suit commonly used valve standards in the petroleum industry.

X



Process piping when all was supplied by Vector:It is difficult to find any negative experience from the use of the SPO CF before new manufacturers started supply of flanges to NORSOK L-005 in 2004. All flanges and valves were supplied without leakage problems during testing on site in the Norne and the Snorre B projects.

Norne FPSO: First process piping: About 200 SPO CF Connections have operated successfully since 1998.

Snorre B semisub.: All flanges of 6” and above in class 600, 1500, 2500 and 4500 are SPO CF.Operated successfully since 2001.





Large cost savings during modifications because:The compact flange joint has been accepted to have same reliability regarding leakage as a welded joint (DNV report 2010-03-12,”Reliability Evaluation of SPO Compact Flange system”)The cold installation of a compact flange joint can be done without shut down, and it reduces total cost substantially when compared with welding in a habitat.

Statfjord B.Comparison between 14” Class 1500 NORSOK and ASME

Sleipner R.Shut down of Norwegian gas supply to Europe reduced from 22 to 8 days when using CF in place of welding.

SPO® Compact Flange for LNG service


Reliability acc. to DNV report of March 2010

Leakage rate per year of a flange connection compared to piping and girth weld



SPO® Compact Flange Fire insulation for one hour jet fire

Åsgard Subsea CompressionSPO® Compact Flange


SPO® Compact Flange Åsgard Subsea Compression

Bolted joints subsea are now typically qualified to be 100% leaktight for the service life of the system through extensive cyclic testing to maximum and minimum design temperatures, and fully pressurized.

Bolted joints in process industry offshore and on land are defined as possible leak sources, and its use is restricted in unclassified areas, i.e. in areas where ignition sources may occur.

For how long will authorities accept this inconsist ency?

Subsea vs Topside application



Tor EriksenFreudenberg Oil & Gas Technologies

SPO® Compact FlangeWhy Vector makes

a difference


SPO v NORSOK L-005 & ISO 27509Comparison

1312.03.2014

L-005 / ISO 27509 SPO (Vector)

Dimensions and

pressure classes

Limited to:

½”-48” for CL150 to CL 1500

½”-24” for CL 2500

L-005 +

5K , 7.5K, 10K & 15K in ½” to 24”

CL150, CL300 up to 64”

Pipe wall thicknesses /

Face angle

Limited /

Fixed

Tailored to any pipe dimension and

rigidness

Temperatures L-005: -100°C to + 250°C

ISO: -200°C to + 250°C

-200°C to +700°C

Bolting B7 strength L-005 + B7M /L7M, B8M cl.2, Gr660 cl

A/B/C/D, Duplex, Nimonic 80A etc.

Swivel flanges No Yes

Subsea suitability Limited

Not verified for HISC to DNV-

RP-F112

No qualification testing

No practical limits

Verified for HISC to DNV-RP-F112

Qualification testing performed to subsea

standards

Seal ring IX IX, IXS, HX, Duoseal

Quality Open standard, dominated

by flange factories.

One dedicated supplier

Engineering and on-site

support

Close to non-existent Experienced team.


Any pressure or temperature:

Complete standards for API pressure classes 10ksi (689bar) and 15ksi (1034bar) flanges up to 24” (DN600) are now available.

An improved standard for class 150 flanges has been developed. Qualified for cryogenic service:

Tested by shock cooling From +20 oC to -180oC in 3 minutes, with pressurized N2He at 30bar.Result: No leak detected From 3 cycles!




Cryogenic service

� The test was made in the shops of Westad Industri AS on 2010-07-08.

� Liquid Nitrogen was introduced at the bottom of the pipe, which was pressurized to 30 barg.

� In spite of a very assymmetric and quick cooldown, there was no leakage detected from 3 trials witnessed by DNV.



Cryogenic service

From qualification testing of a flexible pipe LNG l oading system at the Ebara test Facilities in Nevada 2002

� Regular staff claimed that the ASME flange connections always leak during cooldown

� No leakage observed from any SPO CF with IX seal ring

� Leakage observed from every ASME flange connection at every start-up before retightening the bolts.



• Maintenance hatch difficult to keep leaktight during rapid cooldown.

• Maintenance hatch suitable for minor repairs and replacement of seat, only.

• Recertification with in-situ pressure and seat test may not be possible.

• Major repairs will require replacement and hot work when installing a new valve.

• Relatively long end to end dimension.

Cryogenic service



• Benefits above welded end valve with hatch:– Reduced dimensions– Reduced weight– Can sustain higher loads, e.g. Thermal shock without

risk of leakage /emission to the environment– Valve part (midsection) can be fully repaired and

recertified in a workshop, and reinstalled without hot work.

• Negative:– The IXS sealring require some flexibility in the piping

system for removal and reinstalling the valve.– Metal to metal sealing surfaces are vulnerable to

scratches from mechanical impacts and lack of cleanliness.

– Propriatory single source sealing technology.

Valve with compact flanges


• DNV Offshore Standards• ASME B31.3 Process Piping• ASME VIII div.2• ASME B31.8 Gas Transmission and Distribution

Piping Systems• Statoil TR0034 Subsea X-mas Tree and

Completion/Workover Riser Systems• ISO 13628-7 Completion/workover riser systems• API 6A / ISO 10423• API 17D / ISO13628-4

Type approved

1912.03.2014

Quality system aproval

Type Aproval

CalculationMethod Aproval



SPO Compact Flange Seal ring Properties

Carbon/Low Alloy Steel (4130/4140)

High Strength Stainless 17/4 PH (630 SS)

Duplex Steel (e.g. F51, F55 etc.)

Austenitic Stainless (e.g. 6Mo, etc.)

Super/Nickel Alloys (e.g. 625, 718, Gr660)

Complies with NORSOK L-005

High strength metals are used to manufacture the seal ringsAll to NACE standards


Conclusion� Compact flanges saves weight and space and offers state of the art

reliabillity

� Why FO&GT Vector makes a difference:

• Vector offer compact flange joints for almost any pressure and temperature

combinations, special space restrictions or load combinations, and with sealing

performance and reliability as for welded joints.

• Vector offer the most stringent quality management upon materials, dimensions

and sealing capabilities.

• Vector offer training of bolted joint personnel at any construction site worldwide.

• Vector offer on-site supervision, on-site repairs and interface management

• Vector offer 25 years of experience with Compact Flanges – we know where

things can go wrong.

� Use FO&GT-Vector products as your partner for compact flange supply and

management.



Many Thanks for your

attention!!!

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SPO Compact Flange also suitable for LNG - Valve · PDF fileVerified for HISC to DNV-RP-F112...

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