COMPOSITE WRAP's for pipeline repair

[Dario2002]

What is Your expirience with composite wrap for onshore underground gas pipeline repairs?

Until now we have used Clock Spring, some times WrapMaster (PermaWrap). I think this is fiber glass wrap's.

Now we have some "Black Diamond" (Res-Q) which is carbon wrap, much more flexibile around welds, tee's, bend's, etc. We need it for repair of corrosion anomalies 30-40% of pipewall thickness, sometimes up to 60%.

Question is it acceptable for use and is it suitable replacement for Clock Spring? How is regulated acceptance by currently valid standards?

I know about manufacturers presentation facts, but I want 3'rd party opinion ..

 

[SJones]

Start with PRCI Pipeline Repair Manual R2269-01R and then take a look at:

http://www.hse.gov.uk/research/otohtm/2001/oto01038.htm

Steve Jones
Materials & Corrosion Engineer

http://www.linkedin.com/pub/8/83b/b04

 

[Dario2002]

As I can see from preview in PRCI, and from HSE guidlines, there is no mention of Black Diamond (new name Res-Q) composite wrap.

This is carbon fiber composite wrap ofered by TDW, there for should be ok, but I can not find anyone with real expirience ..

 

[bcs5274]

around here they use a polyken tape in various thicknesses

 

[Dario2002]

Polyken tapes are only for anticorrosion protection, and we use it also. Composite wraps (Black Diamond, ResQ, ClockSpring, PermaWrap, WrapMaster) are for reinforcement or repair of damaged pipe (corrosion damage, dent, gouge, etc.)

We have used most of them, but Black Diamond and/or ResQ is new on market, I see it is easy for use, and practical, but I'm not sure about quality, and I want to hear second opinions ..

 

[SJones]

Review the qualification test reports that the manufacturers will have produced to meet ISO TS 24817

http://www.iso.org/iso/search.htm?qt=24817&searchSubmit=Search&sort=rel&type=simple&published=on

That should serve as a good starting basis in the evaluation

Steve Jones
Materials & Corrosion Engineer

http://www.linkedin.com/pub/8/83b/b04

 

[CSBud]

Clock Spring has a wet lay-up as well called Contour. I can highly recommend.