What Engineers Actually Want to Know About On-Site Pressure Vessel PWHT
A photo of a 55-foot pressure vessel at 1,150°F made its way onto a major engineering community online. Within 24 hours: 503 upvotes, 70+ comments, 102,000+ views — and a comment section that turned into one of the most genuine technical Q&A sessions we’ve seen on on-site PWHT. The questions were real. From mechanical engineers, […]
On-Site vs. Shop Furnace PWHT — Why Smart Fabricators Choose Mobile Heat Treating
We don’t transport the vessel to a furnace. We turn it into one. A complete breakdown of on-site vs. shop furnace PWHT — cost, transport risk, size limits, schedule control, and documentation. Everything fabricators need before they choose.
What Happens If You Rush a Refractory Dry Out
Refractory lining is expensive. The installation labor alone makes it one of the higher line items on any heater or vessel turnaround. The dry out is the last step before the system goes into service — and it’s the one that gets compressed when a schedule gets tight. That’s usually when the damage happens. Technical […]
About to Ship a Pressure Vessel for Heat Treatment? There’s Another Option.
You’ve got a vessel ready for furnace PWHT. You’re calling furnace shops, getting freight quotes, checking schedules. That’s the process most fabricators run — because for most fabricators, a heat treating furnace is the only option they’ve ever used. It isn’t the only option. And for large pressure vessels, it’s often not the best one. […]
Refractory Dry Out: The Complete Guide for Fabricators and Plant Managers
Jump to a Section: Introduction — What Is Refractory Dry Out and Why It Matters Section 1 — What Is Refractory Dry Out? Section 2 — Full vs. Partial Refractory Dry Out Section 3 — How the Refractory Dry Out Schedule Is Built Section 4 — Multiple Hold Stages — Not Just One Section 5 […]
How Long Does On-Site Pressure Vessel PWHT Take?
If you’ve ever wondered how long on-site pressure vessel PWHT takes, here’s the straight answer: for most jobs, Gulf Coast Combustion is on your floor and done in 2 to 3 calendar days. That’s start to finish — vessel wrapped, heat cycle complete, cooled, unwrapped, and turned back over to you. We tell customers 3 […]
What 10 Years With the Same Client Actually Looks Like
The first time one of our longest-running clients saw on-site pressure vessel PWHT, he didn’t describe it in technical terms. He said it looked like cooking a baked potato — wrap it in foil, put it in the oven, cook it through. That’s it. That’s direct gas fire combustion in one sentence. That fabricator runs […]
5 Questions to Ask Before You Hire a Mobile Heat Treating Company
Not all mobile heat treating companies are created equal. For pressure vessel fabricators, choosing the wrong vendor can mean schedule delays, execution problems, or a heat treat cycle that doesn’t meet code. Here are five questions worth asking before you award a job. Question 1 How Much Experience Does the Mobile Heat Treating Company Have […]
Localized PWHT: Pipe Spools, Nozzle Welds, and Vessel Repairs
Pipe spools, flange faces, nozzle welds, and seam weld repairs all require post weld heat treatment on a specific area — not a full vessel treatment. Localized PWHT is the right tool for this work, and it’s one of the more common jobs Gulf Coast Combustion performs alongside full vessel heat treating. Here’s how it […]
Pressure Vessel PWHT by Vessel Type: What Fabricators in Oil & Gas and Petrochemical Need to Know
Pressure Vessel PWHT by Vessel Type: What Fabricators in Oil & Gas and Petrochemical Need to Know If you fabricate pressure vessels for oil & gas, chemical processing, or petrochemical applications, you already know that post weld heat treatment is code-required on most of what you build. What’s less often discussed is how the vessel […]
Refractory Dry Out Failure: Why Getting It Right the First Time Matters
Refractory lining is a significant investment — in materials and in the labor to install it. The dry out process is the final step before the refractory goes into service, and it’s one that gets underestimated more than it should. A poorly executed dry out is one of the most common causes of premature refractory […]
THE FABRICATOR’S COMPLETE GUIDE TO PRESSURE VESSEL PWHT
Jump to a Section: Introduction — What Is PWHT and Why It MattersSection 1 — What Is Post Weld Heat Treatment?Section 2 — When Is PWHT Required?Section 3 — The PWHT Process: Step by StepSection 4 — Temperature & Rate SpecificationsSection 5 — How Wall Thickness Affects the ProcessSection 6 — On-Site Direct Gas Fire […]
Why the Best Pressure Vessel Fabricators Don’t Shop for a New Heat Treating Vendor Every Year
There’s a particular kind of fabrication shop that stands out in the pressure vessel heat treating world. Their work is precise. Their timelines are tight. Their clients — refineries, chemical processors, upstream oil and gas operators — don’t tolerate delays or rework. These shops have one thing in common: they stopped treating pressure vessel heat […]
Direct Gas Fire Heat Treating: What It Is and Why Fabricators Choose It
Most fabricators picture a box furnace when they think about heat treating. Gulf Coast Combustion uses something different — high-velocity direct gas fire combustion. It’s the method behind GCC’s on-site pressure vessel PWHT, refractory dry outs, and coating cures, and it’s worth understanding why. Here’s a straight explanation of what it is, how it works, […]
Why Rising Oil Prices Favor On-Site PWHT
If you’re a pressure vessel fabricator who relies on an outside furnace for PWHT, you’re probably already feeling the pressure of rising transportation costs — and it’s likely to get worse before it gets better, which is why on-site PWHT cost savings have never been more significant for fabricators. Brent crude oil has surged nearly […]
PWHT Requirements Under ASME Section VIII
If you fabricate pressure vessels, post weld heat treatment (PWHT) isn’t optional — it’s a code requirement driven by ASME Section VIII, Division 1. But understanding exactly when it’s required, and what the parameters look like, is where things can get complicated. Here’s a practical breakdown. Gulf Coast Combustion has been executing ASME-compliant pressure vessel […]
Post Weld Heat Treating: Can It Be Done On-Site?
Yes. Post weld heat treatment can absolutely be done on-site — and for large, heavy pressure vessels, it’s almost always the right call. Gulf Coast Combustion has been performing on-site PWHT using direct gas fire combustion since 2014, mobilizing directly to fabrication shops and plant sites across the Gulf Coast and the U.S. Here’s how […]
Gas Train Equipment: How Direct Gas Fire Heat Treating Works
When Gulf Coast Combustion shows up on a job site, the equipment setup is what the industry calls gas train equipment. It’s the core of direct gas fire combustion heat treating — the method GCC has specialized in since 2014. Here’s a breakdown of what each component is, what it does, and why it matters […]
Time Lapse of on-site PWHT pressure vessel
Watch Gulf Coast Combustion perform on-site pressure vessel heat treating from start to finish — captured in a 90-second time-lapse at a customer location. This video walks you through the complete on-site pressure vessel heat treating process: initial setup, cook, temperature recording, and strip out on a massive custom-engineered 70′ x 16′ high-pressure vessel weighing […]