×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Code weld per ASME IX

Code weld per ASME IX

Code weld per ASME IX

(OP)
Is spot-welding of nameplate on a ASME VIII Div 1 pressure relief valve considered a code weld?

UG-136 is not clear as far as nameplate attachment is concerned.

Please share your opinion. Thanks.

RE: Code weld per ASME IX

Yes. The paragraph that references nameplate marking is UG-129 a). It states that safety, safety relief, relief valves .... NPS 1/2" or larger shall be plainly marked by the Manufacturer or Assembler with the required data in such a way that the marking will not be obliterated in service. The marking may be placed on the valve or on a plate or plates that satisfy the requirements of UG-119.

See paragraph e) the nameplate shall be attached to the vessel or pad, bracket or structure which is welded, brazed or soldered directly to the vessel.

I would take this to mean spot welding a nameplate to a safety valve requires a qualified welding procedure and welder..

RE: Code weld per ASME IX

As per ASME VIII Div. 1 UW-28 (c)
Quoted:
The procedure used in welding nonpressure-bearing
attachments which have essentially no load-carrying
function (such as extended heat transfer surfaces, insulation support pins, etc.), to pressure parts shall meet the following requirements.
(1) When the welding process is manual, machine,
or semiautomatic, procedure qualification is required in
accordance with Section IX.
(2) When the welding is any automatic welding process
performed in accordance with a Welding Procedure
Specification (in compliance with Section IX as far as
applicable), procedure qualification testing is not
required.
Unquoted.
It is immaterial what welding process is used: whether fusion or resistance welding. Any welding to the pressure envelope is considered to be equally important with regard to records and qualifications. NDE will be different only.

And I would like to draw your attention to UW-28 (a):
"Each procedure of welding that is to be followed
in construction shall be recorded in detail by the manufacturer."

Putting Human Factor Back in Engineering

RE: Code weld per ASME IX

One more thought:
in my previous answer I assumed that you weld the nameplate directly to the shell. If you weld the nameplate to the bracket not directly to the shell that will be a non-code weld.

Putting Human Factor Back in Engineering

RE: Code weld per ASME IX

As I undestand you are dealing with the safety valve here.
It is my opinion that the Code will allow you to tack weld the name plate of the valve with just a the proper WPS.
the Code will allow the safety valve as PART and not part of the vessel. The safety valve mfr or assembler will have the responsibility here.
ER

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources