×
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

P and S numbers

P and S numbers

P and S numbers

(OP)
What does the P number and S number stand for. Also what an F number and A number stands for.

RE: P and S numbers

redandysafc;
The P-No classification was established by ASME Boiler and Pressure Vessel Code, SC IX to group metals having similar weldability characteristics.

The S-No was developed for metals that were not endorsed by ASME Boiler and Pressure Vessel Code, SC II. Again, the same premise applies regarding S-No classification as P-No classification.

The F-No is a classification for filler metals, similar to P and S-No classification.

The A-No define chemical composition for various filler metals and was established by AWS, years ago.

RE: P and S numbers

(OP)
metengr I am doing a project on welding procedures and I need to know if they stand for anything. Or a good websitye that might help me.

RE: P and S numbers

Ok. Here you go;

http://www.pnumbers.com/

The above will get you started. Get a copy of ASME Boiler and Pressure Vessel Code, Section IX, you should read Article 1 and 2.

RE: P and S numbers

We had a discussion on this at the ASME Section IX Subcommittee meeting a year or two ago. Dr. D'or Doty, who probably was the longest subcommittee member at that time said that the "P" originally designated materials approved for welded "pressure" applications.  The "S" numbers were developed sometime after P-Numbers and originally referred to materials approved by Code Cases for "structural" applications.  That description would no longer be correct today, as there are many S-number materials that are used for pressure applications, such as piping.

RE: P and S numbers

(OP)
Thanks a lot you have really helped me there.Thanks Welder 4965 also thanks Metengr your hrlp is always appreciated

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