Welding and Fabrication experts for ASME U & U2 compliant projects

ASME U & U2 Stamp Holders

Arc Energy Resources is a proud holder of ASME U, ASME U2 & National Board Stamps, enabling us to provide a range of services from full supply of ASME code compliant equipment and pressure vessels to subcontract welding on free-issue ASME standard material.

ASME is the American Society of Mechanical Engineers. It was formed in 1880 and issued its first standard, “Code for the Conduct of Trials of Steam Boilers”, in 1884. The first edition of the Boiler and Pressure Vessel Code (BPVC) was published in 1915 and was 114 pages long, the latest BPVC is now over 16,000 pages long and is the largest standard in the world.

Holders of stamps are able to mark vessels proving that they comply with all the relevent code requirements.

ASME quotes on its website:

“Businesses and regulators around the world rely on the ASME Mark. ASME certification is the clearest way to tell customers, supply chain, industry, and regulators that your company is committed to public safety and quality.

ASME’s Conformity Assessment program is the leading, universally recognized, independent Quality Assurance (QA) program that certifies that manufacturing, power generation, stamped products and parts fulfil the requirements of relevant ASME codes and standards. It certifies that stamped items conform to ASME standards, including the ASME Boiler and Pressure Vessel Code (BPVC)”.

“The Mark gives confidence that relevant QA processes, products and parts are safe, high-quality, reliable and consistent. In many countries, ASME certification is a means of complying with regulations, while also promoting global commerce.”

For fabricators of ASME Stamped vessels, the ASME Code requires that any pressure envelope welding activities must be carried out in an accredited shop, this has been a significant challenge when subcontracting parts for welding. As one of only eight UK manufacturers holding ASME U, ASME U2 and NB Stamps, we are the ideal solution to this problem.

Arc Energy Resources can fulfil any code requirement and has comprehensive experience of cladding and welding of “parts” for inclusion into customer vessels and the supply of material for construction of code “parts”. We can, if required, take on the responsibility for the build of code compliant vessels, for holders and non-stamp holders alike. This includes, where required by the code, full specification of requirements, design, supply of materials, welding, testing and certification. We have completed over 450 deliveries totalling more than 1,300 stamped items including:

  • Fully clad pressure vessels
  • Fully clad strainers
  • Solid CRA fabricated vessels
  • Tube sheets
  • Channel heads
  • Pipe
  • Vessel shells
  • Closure necks and doors
  • Flanges
  • Blinds
  • Hubs
  • Nozzles
  • Hydrocyclone

Please click here to view our ASME U & ASME U2 Certificates.


You may also be interested in Arc’s Weld Overlay Cladding services.

For more information and help on specifying engineering projects call +44 (0) 1453 823523 or email