api 5l grade x52 2

[ali.kh]

hi.
could you please tell me is it possible to use api 5L gr. X52 welded pipe (PSL1) instead ASTM A671 gr. CC60 pipe ? note that min. temperature is -55 c

 

[LittleInch]

Possible? maybe, but you need to decide if the differences are within your ability to accommodate or not.

Generally API 5L doesn't like going much below -40C

You need a materials engineer and also look at the physical properties you need and the differences between them.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[weldstan]

Not likely but you need to check with manufacturers.

 

[1503-44]

You forgot to mention some critical information. You don't even say what you want to do with this pipe.

 

[ali.kh]

Thanks all of you. this pipe would apply in an area between pressure vessels. I have not more details about design. we received this order from our client and only thing they have mentioned on that was impact test in -55 c. their order was for ASTM A671 but we can't supply this material right now and going to offer them API 5L grade b.

 

[LittleInch]

Well good luck trying to convince your client about that. ASTM 571 cc60 also seems to come in a large variety of grades.

5L grade B isn't the same as grade x52 and psl1 is a lower grade than psl2.



Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[goutam_freelance]

Your A671 Gr CC60 belongs to T group CS-C (refer B31.1 Appendix-VIII) for which min temperature is more than 29 deg C. It is doubtful whether you can use API 5L Gr X 52 for temperature -55 deg C as all alloy steel/CS pipes has min temp more than -29 deg C. You may have to use other metals like Nickel alloy etc.

 

[ali.kh]

thanks all of you dear friends.

 

[weldstan]

We purchased CC70 pipe, impact tested at -55C nearly 30 years ago for a project in Scotland. All WPS were qualified at -55C as well of course. Nickel content of filler metals was 1.0% max. Max thickness of pipe was a bit greater than 2 inches. It would appear that the appropriate Code of Design/Construction would be ASME B31.3 - not B31.1.