Stress-rupture cracks can be repaired by grinding for removal and then restoring the ground area to the minimum required thickness with weld build-up, similar to…
Category: In-Service Inspection
Hydrogen blisters generally do not significantly compromise the integrity or reliability of a pressure vessel. The separation causing the blister to appear is parallel to…
It is not acceptable to repair cracks attributable to the terminal stage of hydrogen attack (see Section 738) by local grinding and weld build-up. Cracks…
Stress-corrosion cracks in a pressure vessel can be repaired in a manner similar to fatigue cracks (see Section 744). However, the repairs to the vessel…
Mechanical and thermal fatigue cracks can be repaired by first removing by grinding, followed by weld build-up of the ground area to restore it to…
Visual indications that deteriorating claddings or weld overlays are resulting in corrosion of the pressure vessel shell must be further investigated. Hammer testing can provide…
Areas of localized corrosion or pitting in pressure vessels can be permitted to have a remaining wall thickness that is less than the ASME Code…
General wastage of a pressure vessel shell over a relatively large area, that reduces the thickness of the shell below the minimum thickness required by…
The information obtained from the inspection of a pressure vessel must be interpreted and evaluated to determine if the vessel has sufficient integrity for continued…
Only a small number of pressure vessels in process plants operate at temperatures high enough for creep to occur during normal operation. Creep is the…