Process & Welded Piping Fabrication
Shop and field fabrication in carbon steel, stainless and copper — process, utility and specialty gas systems, documented and tested.
Process piping is where mechanical contracting stops being about comfort. A therapeutic manufacturer's WFI loop, a laboratory's chilled process water, a plant's compressed air and vacuum, a research facility's specialty gases — all have cleanliness, material, documentation and testing requirements that a commercial HVAC crew is not equipped for.
CMI fabricates and installs process piping in carbon steel, stainless steel, copper and specialty materials, with orbital and GTAW welding for sanitary and high-purity work, and documented weld procedures qualified to ASME Section IX. Systems are built to ASME B31.1, B31.3 and B31.9 as the application requires, with weld maps, material traceability, passivation and testing records.
Our shop does the heavy lifting. Spools, skids, headers, pump assemblies and manifolds are fabricated, cleaned and pressure tested in controlled conditions, then delivered and set in the field. Owners get shorter site durations, less hot work in occupied buildings, and better weld quality than any field-only approach can produce.
Scope & capabilities
- Carbon steel, stainless steel, copper, and specialty alloy piping
- GTAW, SMAW and orbital welding for sanitary and high-purity systems
- Process chilled water, hot water, glycol and heat transfer fluid loops
- Weld mapping, material traceability, passivation and cleanliness protocols
- Pipe supports, seismic bracing and OSHPD/HCAI-compliant restraint
- Shop fabrication of spools, headers, skids and pump/valve assemblies
- Compressed air, vacuum, nitrogen, CDA and specialty gas distribution
- Laboratory utility piping, deionized water and WFI loop support
- Hydrostatic, pneumatic and helium leak testing with documentation
The technical envelope
- Codes
- ASME B31.1, B31.3, B31.9; ASME Section IX weld qualification
- Sizes
- 1/4" tubing through 24" pipe
- Materials
- CS, 304/316L SS, copper, PVDF and specialty on request
- Fabrication
- In-house shop with staging and delivery to schedule
- Documentation
- Weld maps, WPS/PQR, material certs, test reports
Facility types
Process & Welded Piping — straight answers
- Do you have certified welders for stainless and sanitary work?
- Yes — GTAW and orbital-qualified welders working to procedures qualified under ASME Section IX, with qualification records provided as part of the submittal and closeout package.
- Can you fabricate skids and headers off site?
- That is our preference. Shop fabrication gives better weld quality, controlled cleanliness and pressure testing before delivery, and it dramatically shortens field time in an operating facility.
- Do you handle seismic bracing and OSHPD requirements?
- Yes. Healthcare work in California requires HCAI/OSHPD pre-approved restraint systems and inspection coordination, and our field crews and detailers are experienced with both.
Get a number you can budget against
We walk the plant before we price it. You get equipment condition, options, phasing and a schedule — not a guess with a contingency wrapped around it.