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piping material?

piping material?

piping material?

(OP)
which is the suitable material for natural gas piping
Material: CS, seamless
Pipe dia: DN200
Design temp range: -30deg C - 200deg C
Pressure rating: 1500CL
 

RE: piping material?

Would you define the design and construction code being applied to the piping?

Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
 

RE: piping material?

(OP)
SJones,

design code ASME B31.3
looking for following options:
A106 GrC (XXS)
A333 Gr6 (XXS)
API5L GrB

what will be the impact testing requirement?

RE: piping material?

Carbon Steel at -200 deg C?? Don't bother, there is no impact test requirement...
Look for High Alloy materials.
Cheers,
gr2vessels

RE: piping material?

(OP)
gr2vessels,

design temp range is (-)30degC to 200degC
sorry if it was not clear in original post
 

RE: piping material?

The ASME SA-333 grade 6 pipe, which is tested at -45 deg C is one of the most common materials for low temperature application in pressure vessels ( nozzle neckes, etc...). The ASME SA-106 gr C is not suitable for your application, but you can request the impact testing of API5L pipe as per Appendix F (refer SR5B) of that specification and perhaps this would be your best bet/option. From the top of my head, you're looking for 40J at -30 deg C average with minimum 32J (1 off 3 specimen) at -30 deg C (check with the API specification). For rating, look up the Tables (4, 5, etc...).
Cheers,
gr2vessels

RE: piping material?

A natural gas pipeline being designed (spec'ed) for 200 degree C?   

Seems a bit "high" for anything outside the small amount of pipe actually in the final end of the final process line in the final use plant.

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