A995 and A890

[nickypaliwal]

Can ASTM A 995 and A 890 be used interchangeably for valves ?

 

[jwhit]

Material wise, they are the same but A890 is for General Applications whereas A995 is for Pressure Containing Parts. The difference is there are a few subtle variations in how they are processed and also which set of general requirements applies. Look at the two specs. side by side.

 

[metengr]

No.

 

[nickypaliwal]

I have observed that both are accepted on majority of occasions. Can you please describe a case where one is suitable and other is not ?

 

[jwhit]

I too have seen cases where A890 is specified for valves. I believe, but would not bet my right arm on it, that the reason for this is the A890 specification pre-dates A995, so that is what they had to go by when the duplexes first came into common usage. If I were specifying a valve material today, I would use A995 for my material specification.

 

[nickypaliwal]

I got that A 995 is the preferred option.... but can you advice if A890 is not suitable somewhere or not acceptable ??

 

[SJones]

If you are dealing with your major client, you might like to point out to them that DEP 30.10.02.11-Gen only refers to A890.

Steve Jones
Corrosion Management Consultant

http://www.linkedin.com/pub/8/83b/b04

All answers are personal opinions only and are in no way connected with any employer.

 

[nickypaliwal]

Thanks for all your responses... I am still not sure where can we not accept either of two ?

Can somebody please elaborate ?