Vessel Heat Treating — On-Site PWHT for High-Pressure, Custom-Engineered Pressure Vessels
Gulf Coast Combustion specializes in on-site post weld heat treatment (PWHT) for custom-engineered pressure vessels, including high-pressure, thick-walled components built to ASME Section VIII requirements. We serve metal fabricators producing code vessels for oil & gas, chemical processing, and renewable energy applications — the jobs where heat treating has to be done right, documented completely, and delivered on schedule.
We use direct combustion gas fire — natural gas or propane — to perform PWHT at your facility. No vessel transport. No oversized load logistics. No waiting on a furnace queue. We bring the heat treating to your shop, set up around your schedule, and leave with complete chart recorder documentation before we go.
Gulf Coast Combustion has performed more on-site pressure vessel heat treatments per year using direct combustion gas fire than any other mobile heat treating company in the United States. Over 95% of our work is on-site gas combustion PWHT — it’s what we specialize in, and it shows in our results.
Why fabricators of high-pressure, thick-walled vessels choose GCC:
Our 6 to 8 Million BTU burners and 20 HP high-velocity blowers are built for large, heavy-wall vessels — the kind that require precise temperature control across significant wall thickness to achieve full stress relief throughout the weld and heat affected zone. We are fully equipped to PWHT vessels over 120 feet long and any diameter. Whether you’re fabricating reactors, separators, heat exchangers, or custom process vessels for petrochemical or energy applications, our equipment and our team are sized for the work.
Complete, code-compliant documentation on every job:
Every PWHT cycle we perform is fully documented with chart recorder traces showing heat-up rate, hold temperature, hold time, and cool-down rate — traceable to specific weld seams on your vessel. This documentation becomes part of your permanent vessel record and meets ASME Section VIII requirements. Your QC team can witness the process directly, on-site at your facility, from start to finish.
ASME code vessels for oil & gas, chemical, and renewable energy:
We understand the quality expectations of fabricators building code vessels for major operators in oil & gas and chemical processing. We’ve been doing this since 2013, and our repeat customers come back to us because we show up when we say we will, we execute to specification, and we don’t create documentation problems for their quality systems.
We can perform PWHT using your supplied natural gas (at significant cost savings) or bring propane to your site. We are also fully equipped to work in refineries and facilities with reactive materials in surrounding areas.
Available nationwide. Based in Spring, TX.
Gulf Coast Combustion mobilizes anywhere in the United States. We are based in the heart of the Gulf Coast energy corridor in Spring, TX — close to the major fabrication centers in the Houston area and within easy reach of facilities throughout the region.
See It In Action
Watch a complete on-site pressure vessel PWHT cycle from start to finish — 72 hours of work in 90 seconds.
Ready to discuss your next high-pressure vessel project? Call us at 713-425-3773 or request a quote online.
