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What does "CR" mean?

What does "CR" mean?

(OP)
I was referencing ASTM 403A, and noticed the designations "WP", and "CR".  From past posts I found that "WP" stands for "Welded Pipe".  I was unable to find a definition for "CR".  What does "CR" mean?  What are the differences between WP and CR?  From what I could tell, it is the hydrostatic testing methods, and dimension standards that are different.  Are there other differences, what about advantages/disadvantages between the two?  Any help would be appreciated.

RE: What does "CR" mean?

CR= Corrosion Resistant

RE: What does "CR" mean?

It could also mean cold rolled - see the CASTI Guidebook to ASME Section II, 2000 Materials Index.

RE: What does "CR" mean?

(OP)
Thanks for the responses guys.  So either corrosion resistant or cold rolled.  One is a characteristic/property, and the other sounds like a process.  I've looked at the CASTI, and I did find the abbreviation definition for "CR".  What's the major difference between "WP" and "CR"?  Any ideas.

RE: What does "CR" mean?

WP stands for "Wrought Pipe" and CR stands for "Corrosion Resistant".  These can be seamless or welded construction.

 

RE: What does "CR" mean?

CR Grades are separate with no class designation. They can be seamless, but they are not welded. It is covered in A 403.

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