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Autogenous Welding per Section 9 & B31.3

Autogenous Welding per Section 9 & B31.3

Autogenous Welding per Section 9 & B31.3

(OP)
I would like to learn more about autogenous welding processes, which do not use filler material.  The application I am interested in would be applied to full penetration pipe butt welds, such as to connect a weld neck flange to a pipe run.

Where would an autogenous process typically be applied?  Are there diameter and thickness limitations, or other special considerations?  The welding must also be in conformance with ASME B31.3 and ASME Section 9.

Thanks for any input.

RE: Autogenous Welding per Section 9 & B31.3

Only seems to work well on Sch5 & Sch10 stainless.  Best answer for carbon steel, and regular pipe thicknesses is "narrow groove welding".  Try Googling that.

RE: Autogenous Welding per Section 9 & B31.3

Electron beam welding, inertia/friction welding, resistance welding & flash welding are all processes that either are or can be autogenous. They all can be used for making welds conforming to B31.3 and Section IX. Laser, plasma and GTAW processes are more limited in thickness as per Duwe6.

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