×
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

ASME IX WPS Joint Design Clarification

ASME IX WPS Joint Design Clarification

ASME IX WPS Joint Design Clarification

(OP)
Hello,

I am hoping I can get some help understanding the joint design details required on a WPS using SMAW with a groove weld.

What details are required in terms of the root spacing, land, bevel, backing, etc?

QW-253 shows all nonessential, so does that mean that a WPS with an illistration of a groove joint is sufficient?  If not, where can I find the governing factors with the specific information?

Thanks.

RE: ASME IX WPS Joint Design Clarification

You can use the prequalified joint details depicted in AWS D1.1 for a starting point.

You can also refer to a number of AWS D10.X recommended practices for pipe joints. An example of one of the D10.X RP is AWS D10.12 Recommended Practice and Procedures for Welding Plain Carbon Steel Pipe.

Best regards - Al  

RE: ASME IX WPS Joint Design Clarification

You can also refer to joint designs in piping codes and ASME Boiler and Pressure Vessel Codes.

RE: ASME IX WPS Joint Design Clarification

(OP)
Thank you both for the reply.  But in terms of a QW-282 the root spacing or bevel angle do not need to be spcified ot illistrated.  

RE: ASME IX WPS Joint Design Clarification

In this case, I would show a nominal sketch groove weld on the WPS and would add a note "follow the joint detail as per relevent drawing(s)".

Nasir
Welding Engineer
DESCON ENGINEERING LIMITED
PAKISTAN

RE: ASME IX WPS Joint Design Clarification

ASME code sections are not "how to" codes. Weld details such as root opening, groove angle, groove type, etc. is pretty much left to the engineer's discretion. There are several prohibited joint details in several of the construction codes, but again, little in the way of specifics. You can reference B16.25 for a couple of typical pipe details, but there is nothing specific relating to vessels.

The information needed by the welder to properly fit-up the weld joint are typically considered to be nonessential variables. That means the engineer can change them without having to requalify the welding procedure, but that doesn't mean the information doesn't need to be provided to the welder. While ASME codes provide the engineer with considerable latitude, it doesn't mean the engineer doesn't have to address the problem and lay it all at the welder's feet with a comment like, "You're a welder, you should know this stuff." That's a cop-out by an engineer that doesn't know what he/she is doing.
  

Best regards - Al  

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