[er.piping]

I have few questions…
1. What type of supports are used for stress relived lines and
2. How a PWHT line is again stress relived at site after two spools are welded together during erection.
3. If a new support is to be added on a stress relived line after PWHT what are the options.

[knives]

A line requires PWHT and instead of welding a shoe directly at fabshop, a pad was provided instead then heat treated. Is it still required to perfom PWHT for the weld made at site if a weld between a pad and shoe was made?

[Author]

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