Welded Clamp Ferrules on Code stamped vessels and CRN 1

[bayardwv]

#1. Which section of ASME Section VIII Division 1,U-1 addresses the SCOPE of commercially available Tri-Clamp fittings butt-welded to a pipe extension on a Code stamped vessel? (NOTE: Fitting is attached in accordance with VIII, Div.1 requirements)
Not Included: U-1(c)(2)(-e) & U-1(e)(1)(-a)
or Included: U-1(e)(1)(-d)?

#2. Canadian reviewer is requesting Calc's or proof test reports for the purchased standard Tr-Clamp weld fittings. Would it be acceptable to provide a copy of the manufactures Catalog Pressure/Temperature chart?

#3. The pressure & temperature is determined not by the fitting but by the style of Clamp. Are we required to bring attention to the customer what clamp is required if we're not supplying the clamp?

 

[SnTMan]

bayardwv, I am not at all familiar with these fittings, but:

1) if your are supplying one, or part of one, welded to your vessel prior to hydro I'd say that part is within Sec VIII, Div 1 scope, U-1(e)(1)(d).

2) You'd best ask the reviewer but I tend to doubt it.

3) You should, absolutely.

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

Edit: added italics

 

[moltenmetal]

You are absolutely NOT the first person to weld a tri-clamp fitting onto a pressure vessel in Canada. You need to find a tri-clamp fitting which has a Canadian Registry Number (CRN) in the province in question, which will satisfy the requirements of the reviewer, then make sure that you can get a mill cert for that part.