Weld Joint Strength Reduction Factor for Carbon Steel

The author should know...It may be exempt, which means W= 1 for all calculations...

Dear sir,

Can you provide a references as to where in the code it says CS are exempted? Lots of people also say it is exempted, but I cannot find any concrete references in ASME B31.3. The only thing I can find was in the interpretation section, where the ASME board says "ASME B31.3 does not provide weld joint strength reduction factor to Carbon steel material", but that in itself does not tell me CS are exempted?

So if you can tell me where in the code you saw this exemption from, I will appreciate it. Thank you.

Has ASME give an Interpretation yet?

I would presume that "ASME B31.3 does not provide weld joint strength reduction factor to Carbon steel material", does indicate an exemption, unless the body exactly interprets otherwise.

I have noticed some specs, API, for example, that are becoming ambiguous, as they try to conform with EU Standards.

This is why I indicated that the author should know, why don't you contact the author and ask him...You will find the author's name and contact info at the beginning of the code...

The parent metal already has a strength reduction factor for elevated temperatures; apparently the weld simply inherits this factor with no need for a further factor.

Just really common sense isn't it???? GA

I think there is another way to look at this.

A reason why carbon steel is not on that table is because the code does not recommend using carbon steel above 800F. So in that sense, the strength reduction factor at elevated temperature does not apply to CS material. And thus the reduction factor should stay as 1.

Just my 2 cents