Vessel Heat Treating — On-Site PWHT for High-Pressure, Custom-Engineered Pressure Vessels

Gulf Coast Combustion specializes in on-site pressure vessel 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. If you need a heat treating partner who shows up, executes clean, and hands you full documentation before they leave — call our owner James Benefield directly at 832-797-3428.

 He answers calls and texts personally, including short notice and emergency jobs.

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. See the breakdown of pressure vessel PWHT by vessel type.

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 Choose On-Site Pressure Vessel PWHT with 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 2014, 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 Houston & the Gulf Coast — close to the major fabrication centers in the Houston area and within easy reach of facilities throughout the region.

Where We Work

GCC regularly serves fabricators and industrial operators across the Gulf Coast and Texas. Our primary service markets include Houston & the Gulf Coast, Midland & the Permian Basin, Beaumont & East Texas, Corpus Christi & South Texas, Dallas & North Texas, and Baton Rouge & Louisiana. View all service areas.

What Happens After You Call

Getting a quote from GCC is straightforward. Here’s how it works.

Want to know how long we’ll be on your floor? Here’s a complete breakdown of the on-site PWHT timeline — from setup to pack-out.

See It In Action

Watch a complete on-site pressure vessel PWHT cycle from start to finish — 72 hours of work in 90 seconds.

▶ Watch the Time-Lapse Video