American Society of Mechanical Engineers 
  • ASME was founded in 1880 in response to numerous steam boiler pressure vessel failures.
  • First performance test code of Steam Boilers trail was conduct in 1884.
  • First revision of an ASME standard was made in 1900 .
  • ASME has over 140,000 members in 158 countries worldwide .
  • It produces approximately 600 codes and standards covering many technical areas.


  • Verifying that the Manufacturer has a valid Certificate of Authorization UG-117(a) and is working to a Quality Control System UG-117(e).
  • Verifying that the applicable design calculations are available [U-2(b), U-2(c), mandatory Appendix 10-5, and 10-15(d)].
  • Verifying that materials used in the construction of the vessel comply with the requirements of UG-4 through UG-14 and UG-76, UG-77, UG-78 and UG-93.
  • Verifying that all welding procedures have been qualified with the requirements of UW-27, UW-28, UW-47 and ASME Section IX.
  • Verifying that all welders, welding operators, have been qualified with the requirements of UW-29, UW-48 and ASME Section IX.
  • Verifying that the heat treatments, including PWHT, have been performed according to UG-85, UW-10, UW-40, UW-49, and UF-52.
  • Verifying that material imperfections repaired by welding were acceptably repaired by meeting the requirements of UG-78, UW52(d)(2)(c), UF-37, and UF-47(c).
  • Verifying that weld defects were acceptably repaired and acceptable in UW-51(c) and UW-52(c).
  • Verifying that required nondestructive examinations have been performed and that the results are acceptable to UW-50, UW-51, UW-52
  • Verifying that required impact test and Lateral Expansion have been performed and that the results are acceptable UG-84, UG-93 and UHA-51.
  • Making a visual inspection of vessel to confirm that the material identification numbers have been properly transferred as required in UG-77 and UG-94.Making a visual inspection of the vessel to confirm that there are no material or dimensional defects as defined UG-95, UG-96, and UG-97.
  • Performing internal and external inspections and witnessing the hydrostatic or pneumatic tests (UG-80, UG-96, UG-97)
  • Verifying that required PWHT has been performed and that the graph is acceptable to the requirements of UCS-56.
  • Hydro or Pneumatic test performed as per UG-99, UG-100 and UG-102.
  • Verifying that the required marking is provided (UG-115) and that any nameplate has been attached to the proper vessel.
  • Signing the Certificate of Inspection on the Manufacturer’s Data
  • Report when the vessel, to the best of his knowledge and belief, is in compliance with all the provisions of this Division.

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