What is the difference between p number and s number

By joining you are opting in to receive e-mail. Promoting, selling, recruiting, coursework and thesis posting is forbidden. Students Click Here. Related Projects. What does the P number and S number stand for. Also what an F number and A number stands for. Again, the same premise applies regarding S-No classification as P-No classification. The A-No define chemical composition for various filler metals and was established by AWS, years ago.

Or a good websitye that might help me. 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.

Thanks a lot you have really helped me there. Thanks Welder also thanks Metengr your hrlp is always appreciated. Similarly it is an essential variable for welding performance qualification. The welding is not the only application of this P number assignment. UCS Did you find this article useful? We will be updating and growing this site with more and more of industrial inspection related articles. Please subscribe to my monthly newsletter so you don't miss a thing.

Search this Site! More than Articles! I4I Academy Training Courses. The F-number grouping of electrode and welding rod in QW is based essentially on their usability characteristics, which fundamentally determine the ability of welders to make satisfactory welds with a given filler metal.

This grouping is made to reduce the number of welding procedure and performance qualifications, where this can logically be done. The grouping does not imply that base metals or filler metals within a group may be indiscriminately substituted for a metal which was used in the qualification test without consideration of the compatibility of the base and filler metal from the standpoint of metallurgical properties, PWHT design and service requirements, and mechanical properties.

Some queries ,,, 1 Why some numbers and alphabets are not used. Chemical compositions can be easily classified, but which mechanical tests and weldability tests are carried out?? Like Liked by 1 person. Really enjoyed! However, I was curious about the questions left below the article. Could you help me with these issues? Is that I have never come across such arguments.

Would like these answers.