Insight into Steel that is "API 5L PSL 2" in place of A500 for Pipes? 3

[AggieYank]

We are evaluating this API 5L PSL 2 Gr. 42 steel and whether we could use it in place of A500 Gr. B for pipes. A fabricator is telling use it is available and cheaper.

We compared the fy, fu, weldability, and will compare the Charpy V toughness. So far, there are no issues with it.

Also, there are at least two modern steel construction articles in which this steel grade (or a similar API 5L PSL 2) was used.

Does anyone have any insight into this steel?

 

[Ussuri]

API 5L line pipe is a carbon steel and is a common specification used offshore for pipes and also for tubular structural members.

I have worked on a number of projects where it proved easier to get than a circular hollow section and was substituted.

 

[JStephen]

You might compare tolerances on wall thickness as another check. Seems like some codes treat pipe and tube differently because of that.

 

[gwynn]

API 5L is used for high pressure pipelines. I believe you will find it has tighter tolerances and more rigorous testing requirements.