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ASME U-4 scope

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XL83NL

Mechanical
Joined
Mar 3, 2011
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I was reviewing a potential supplier and found theyre ASME stamp certified. Upon going through ASME's stamp holder database, I found theyre certified for scope U-4. What does U-4 mean? never heard of it before and the interwebs werent of any help.
 
U-4 - Manufacture of pressure vessels at the above location and field sites controlled by the
above location (This authorization does not cover impregnated graphite)

Link
 
Your quote is what I found as well on the ASME site. The link you provided now gives me better understanding. I knew the 'old' U-1, U-2 and U-3 stamps were redesignated, to not cover the scope of various divisions. However, does U-4 cover the scope of div 2 and/or div 3, or solely div 1?
 
Heading of the "U" list is Sec. VIII Div. 1 only.
 
Thanks David.
 
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