SA105 or A105 and ASTM or ASME 1

[GSTeng]

I have had some disagreements with our AI inspector for our Pressure vessels and I think I am right but I had to give in to him since he is the one that signs the drawings and lets us proceed with construction.

The first problem I had was I had materials for a flanges stated as "ASTM SA105” The problem the AI inspector had was that he thought the ASTM should be ASME. I disagreed but to no avail. I removed the ASTM and replaced it with nothing, since I thought putting ASME would be wrong. In the opinion of the experts who is right???

The second problem I had was I had a slip on flange stated directly by my code calc program as "4 in class 300 SO A105" the inspector said it should read "4 in class 300 SA105". Now I know that SA105 is the true material spec but doesn’t the SO stand for "slip-on" and the A105 state the material just fine. What is the difference between SA105 and A105?

I am not looking to confront the inspector since he is not the type of person I want to piss off, but I would like to know if I am making mistakes or do I just have a over controlling inspector. THanks for you help

 

[doct9960]

thread292-13574

 

[bmoorthy]

When you put SA 105 in the drawing the prefix should be ASME not ASTM.

ASTM should be the pre fix for A 105.

All this is just cosmetic and hair split. There is no functional difference. I hate to say this, but your AI is correct (At leat these 2 times)

 

[deanc]

Suggest you read the "Forward" in each Code book. Esp. 2nd page.

 

[deanc]

The thread doc9960 refers to is not 100% correct. You must check the SA spec. for the ASTM Year of Issue.

If you use current ASTM spec. to justify a SA spec. it may not be the same.

Also make sure you read all the referenced documents.

 

[metengr]

deanc
Right on the mark, as usual. By the way, are you here at the NB/ASME General meeting in beautiful TX?

 

[doct9960]

I agree with deanc.

The latest year of issue for ASTM A 105 is 2005. For new construction, the latest adopted ASTM year of issue for SA-105 is...
1998 for ASME BPVC 2004 edition
2003 for ASME BPVC 2006 Addenda

 

[deanc]

Thanks metengr.....but not always right on,just try to learn when I miss and go by memory

No,not in TX,would like to be at the meeting but not in that part of the company.

Would like to contact you. See JC in SecVIII Materials or BJL in SWG Heat Transfer for an email addy. I am a big enough pain they will know the name.