Post Weld Heat Treatment

Accurate Edge runs a fully controlled bogie hearth furnace out of our Dubai facility, built specifically for PWHT services on welded components across oil & gas, pressure equipment, piping, and structural work. With PLC-based controls, continuous data logging, and calibrated instrumentation on every cycle, we’re one of the few providers of local post weld heat treatment in the UAE set up to handle both the precision and the paperwork a welded component actually needs.

A weld is only as good as what happens to it afterward. That’s the thinking behind every cycle we run, and it’s why fabricators and contractors across the UAE bring their post weld heat treatment services to Accurate Edge.

What Is PWHT?

Post Weld Heat Treatment, or PWHT, is a controlled heat treatment process carried out after welding, done to meet the requirements set out in approved Welding Procedure Specifications, customer specs, and the relevant industry codes. In practice, that means heating a welded component to a specified temperature, holding it there for a set period, and then cooling it under controlled conditions rather than letting it cool on its own.

Welding puts a lot of stress into a joint, more than most people realize looking at a finished weld. PWHT is how that stress gets managed properly, through a soak cycle engineered to relieve it rather than leave it sitting inside the material. It’s a standard step on welded piping, pressure vessels, nozzles, and any component where code compliance and a controlled thermal cycle aren’t optional.

At Accurate Edge, that cycle runs through a dedicated bogie hearth furnace, with a working size of 2500 mm high, 2000 mm wide, and 2000 mm deep, and a maximum charge load of 15 tons. Operating temperatures run between 300°C and 750°C, controlled and logged throughout, so what comes out at the end matches exactly what the specification called for.

Key Features of Our PWHT Services:

• A dedicated bogie hearth furnace, sized to handle real industrial components rather than small batch work.
• PLC-operated heating and soaking cycles, programmed to the specification rather than adjusted by hand mid-cycle.
• Continuous data logging on every run, building a complete heat treatment record for each component.
• Charge capacity up to 15 tons, enough for heavy welded assemblies and large pressure equipment.
• A working temperature range of 300°C to 750°C, covering the range most PWHT specifications call for.
• Motorized trolley and door system, built for safely moving and handling heavy components in and out of the furnace.
• Calibrated thermocouples and monitoring instruments on every cycle, not spot-checked occasionally.
• Every cycle run to approved procedures, project specifications, and welding requirements, with traceable documentation to back it up.

Benefits of PWHT

Residual stress from welding gets meaningfully reduced. Stress-relieving cycles work directly against the internal stress a weld leaves behind, which is really the whole reason PWHT exists as a process.

Dimensional stability improves. Welded assemblies that go through a proper PWHT cycle hold their shape and tolerances better once they’re back in service, rather than shifting slightly under load.

Weld integrity and reliability both get stronger support. A properly stress-relieved weld performs closer to how it was designed to, instead of carrying hidden stress that shows up later.

Documentation comes standard, not as an add-on. Every cycle is logged and traceable, which matters as much as the treatment itself once a component needs to be signed off against a code or specification.

Applications of PWHT

• Oil & gas equipment
• Welded piping systems
• Pressure vessels
• Nozzles and other pressure-containing components
• Heavy engineering and industrial assemblies

If a component is welded, pressure-containing, and has to meet a code requirement, there’s a good chance PWHT is part of the spec.

Why Choose Accurate Edge?

Plenty of fabrication shops can heat a part. Fewer can run a PLC-controlled cycle on a 15 ton component, log every stage of it, and hand over documentation that actually holds up against a code review, all from one facility.

• Furnace capacity built for real industrial work. A 2500 mm by 2000 mm by 2000 mm working size and a 15 ton charge load means large, heavy components get treated in full at Accurate Edge, not turned away or split across suppliers.
• Precision that’s actually programmed in. PLC-based heating and soaking cycles, monitored with calibrated thermocouples, take the guesswork out of a process where a few degrees or a few minutes genuinely matter.
• Records you can stand behind. Every cycle is logged and documented, so when a customer or inspector asks for proof of treatment, it’s already there.
• A provider of PWHT UAE fabricators actually rely on, across oil & gas, pressure equipment, piping, and structural work.
• Right in the middle of the supply chain. Our Dubai facility keeps turnaround times short for contractors working across the UAE and wider GCC.