Pressure Vessel Inspection Checklist (Unfired)

Title Page

External Inspection

External coverings such as insulation and corrosion resistant coatings are in good condition?
No leakage of gas, vapor, or liquid?
Pressure vessel mountings have adequate allowance for expansion and contraction?
Free of cracks, deformations, or other defects on vessel connections (Manholes, reinforcing plates, nozzles, or other connections)?
Free of corrosion or defects on bolts and nuts?
No distortion found on accessible flange faces?
No erosion or dents found on surfaces of the vessel?
Free of distortion?
The overall dimensions of the vessel should be checked to determine the extent and seriousness of the distortion.
Free of cuts or gouges?
Determine if should be repaired or replaced
Surfaces of shells and heads is free of cracks, blisters, bulges, and other evidence of deterioration? Same with skirt and the support attachment and knuckle regions of the heads?
No cracks or other defects on welded joints and the adjacent heat affected zones?

Internal inspection may be required only if the ultrasonic wall thickness data indicate that there is some wall thinning or no stamp indicating original wall thickness of the shell and dished heads. All parts of the vessel should be inspected for corrosion, erosion, hydrogen blistering, deformation, cracking, and laminations.
https://www.usbr.gov/power/data/fist/fist2_9/fist2-9.pdf
Adequate number of threads are engaged on threaded connections?
All openings leading to any external fittings or controls are free from obstructions?
Special closures are adequate?
No cracks at areas of high stress concentration?
Vessel internals have no deterioration that might constitute a hazard?
Free of corrosion?
Enter type of corrosion (pitted or uniform), its location, and any obvious conditions:

The following steps should be performed for each safety device:
IMPORTANT: The set pressure is not higher than the maximum allowable working pressure (MAWP) marked on the pressure retaining item?
If multiple devices are provided, the difference between set pressure does not exceed that permitted by the original code of construction?
Verify the nameplate capacity and, if possible, compare it to the system capacity requirements.
Identification on seals match nameplates or other identification (repair or reset nameplate) on the valve or device?
The valve or device is sealing properly and not leaking?
Seals are intact and show no evidence of tampering?
Connecting bolting is tight and all bolts intact?
The valve has no deposits or mineral buildup?
No evidence of rust or corrosion?
Parts are not damaged or misapplied?
Visible drain holes are not clogged with debris or deposits?

Is there provision for expansion?
Is there provision for adequate support?
No evidence of leakage?
Is there proper alinement of connections?
Proper rating for the service conditions?
No evidence of corrosion, erosion, or cracking or other detrimental conditions?
Pressure Gages - pressure indicated by the required gage should be compared with other gages on the same system.