A pressure vessel inspection helps to ensure that pressure vessels hold liquids or gases under pressure safely. Engineers, safety officers or boiler inspectors use a checklist for testing a pressure vessel to maintain its good working condition and that of the safety accessories that help keep liquid and gas pressure under control.
A regular pressure vessel inspection prevents failures that can cause costly damage to property, company reputation or loss of life. It is important to comply with applicable industry standards for the inspection of boilers and pressure vessels, which at the same time helps the company comply with applicable health and safety legislation.
Are external coverings like insulation and corrosion resistant coatings in good condition?
Is there leakage of gas, vapor or liquid?
Do pressure vessel mountings have sufficient allowance for expansion and contraction?
Is the vessel wall free of cracks, deformations or any other defects on vessel connections?
Are bolts or nuts free of corrosion or defects?
Any distortion on accessible flange faces?
Have signs of erosion or dents been found on surfaces of the vessel?
Is the vessel free of distortion?
Is the vessel free of cuts or gouges?
Are the surfaces of shells and heas free of cracks, blisters, bulges or any other signs of deterioration?
Are there any cracks or other defects on welded joints & the adjacent heat affected zones?
Internal
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
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Safety Devices
Please perform the following steps for each safety device
Is the pressure set below the maximum allowable working pressure?
If multiple devices are provided, the difference between set pressure does not exceed that permitted by the original code of construction?
Please verify the nameplate capacity and, if possible, compare to the system capacity requirements
Do identifications on seals match nameplates & any other identification (repair or reset nameplate) on the valve or device?
Is the valve or device sealing properly and not leaking?
Are seals intact and without evidence of tampering
Is connecting bolting tight and all bolts are intact?
Is the valve without deposits or mineral buildup?
There is no evidence of rust or corrosion?
No parts are damaged or misapplied?
Did you ensure that visible drain holes are not clogged with debris or deposits?
Rupture Disks:
Is the information on the rupture disk nameplate compatible with the vessel and safety relief valve?
Are the markings indicating direction of flow correct?
Is the space between rupture disk and safety relief valve supplied with a pressure gage, try cock or tell-tale indicator to indicate signs of leakage through the rupture disk?
Is the valve design not influenced by back pressure from leakage through the valve?
Have the combination rules of the code of construction been applied for rupture disks installed on the valve inlet?
Piping Systems
Is there provision for expansion?
Is there provision for adequate support?
There is no evidence of leakage?
Is there proper alignment of connections?
Is there proper rating for the service conditions?
There is no evidence of corrosion, erosion, cracking or other detrimental conditions?
Please note that this checklist template is a hypothetical appuses-hero example and provides only standard information. The template does not aim to replace, among other things, workplace, health and safety advice, medical advice, diagnosis or treatment, or any other applicable law. You should seek your professional advice to determine whether the use of such a checklist is appropriate in your workplace or jurisdiction.
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