Spiral Welded Pipes 1

[etrobal]

i am again tasked to review the applicability of spiral welded pipes (swp) to our system as these swp's are cheaper than our requirements, which are seamless and/or single longitudinal welded pipes.

consider our design parameters (depending on the fluid):
-6.60 mpag at 282degC;
-7.72 mpag at 294degc;
-2.14 mpag at 216degC;
-1.72 mpag at 208degC;
-1.08 mpag at 183degC;
-3.15 mpag at 222degC;
-3.86 mpag at 198degC;
-3.31 mpag at 198degC and
-1.38mpag at 198degC.

from my surfing some websites, swp's are mainly used for piles, supports, water ducts and the like. there is no mention (or did i miss a website??) that swp's can be used for high pressure, high temperature applications.

can somebody please direct me to a website where a plant uses swp's similar to our applications?

if a plant is authorized to use the api 5L monogram, is it safe to assume that the plant does not manufacture swp's?

is the power piping code b311 applicable also to swp's? does the b311 allow the use of swp's?

can i recommend the use of spiral welded pipes in our application? note that we usually have stub ins, pipe shoes that might compromise the spiral welds. or will such connections have an effect on the integrity of the spiral welds?

thanks and am looking forward to your advices and comments.

 

[MTPipeliner]

I know that spiral or helical welded pipe has been used in high pressure gas transmission pipelines up to at least a 600ANSI rating. I believe that IPSCO from Canada produces this type of pipe, it may be worth checking out their website or giving them a call to check on suitability for your application. I'm sure that there are also several other mills that also produce this type of pipe.

 

[pkruchoski]

My company uses SWP in the oil sands of northern alberta CA. It was a pain to get this approved, but it is not impossible. A good place to start would be Northwest pipe company or Chicago Tube. They would be able to look up the specicifactions for spiral weld. I tried to attach a excel file (we'll see if it worked) which I use for spec'ing pipe. It is for slurry transportation, but might help.

Pete