Is it inadvisable (or bad practice) to delay PWHT of a 1.25Cr0.5Mo Pressure Vessel with a wall thickness of up to 133mm (Hydrogen Service)?
Low hydrogen consumables have been used. Appropriate Pre-Heats and post heating / DHT have been applied.
Why is this even a concern?
Logically, since on...
Problem - After a tube leaked in a new exchanger under a hydro test all tubes were checked with ECT and some were found to give indications above reference level.
Tubes were checked by fiberscope. Spiral marks resembling roll straightener marks were seen in the bores. The tube that leaked had...
