What does "CR" mean?

[carltogr]

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.

 

[Metaljon]

CR= Corrosion Resistant

 

[metengr]

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

 

[carltogr]

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.

 

[Metaljon]

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

 

[metengr]

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