The welder marketplace
WeldRunners
Certification

ASME U-stamp fabricators

Required to build coded pressure vessels. Non-negotiable when it applies.

2 shops state they hold ASME U-stamp in California. Each entry below shows the sentence we read it from, on the shop's own website — we don't record a certification we can't quote. Confirm current status with the shop or the certifying body before you award work.

With proven track record and certifications including ISO 9001:2015 and the prestigious ASME U Stamp, we are specialised in providing the highest standards of quality and on time delivery in every project of process systems, modular skid assembly, ASME pressure vessels, and industrial pipe spools.https://ppvcorp.com
Also: ISO 9001
Built to your specifications, every Altam Pressure Vessel is designed and fabricated in accordance with ASME (Section VIII, Division 1) and receives thorough inspection by both our In-house Quality Control and an authorized California State inspector.https://altammfg.com/capabilities/asme-pressure-vessel-fabrication/

Need this work done?

Tell us what you need made and we'll put it in front of shops that hold the right certification — and welders qualified to the same code, if the job needs people on site as well as parts.

Describe your project →