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PWHT is a crucial post-welding process that enhances the structural integrity of metal components by relieving residual stresses, improving toughness, and preventing future cracking.
Post Weld Heat Treatment (PWHT) is an essential process carried out after welding to reduce residual stresses and improve the mechanical properties of welded components. PWHT involves heating the welded material to a predetermined temperature, holding it for a specific period, and then cooling it under controlled conditions.
This treatment is critical for materials susceptible to cracking, such as carbon and alloy steels, and is often mandated by codes like ASME, API, and AWS to ensure safety and long-term performance. PWHT is widely used in pressure vessels, pipelines, boilers, and structural steel fabrication.
PWHT minimizes the risk of cracking, enhances ductility, and ensures welded components meet design specifications and industry standards. It also stabilizes material structure and prolongs service life.
Stress Relief Heat Treatment
Normalizing / Tempering of Welded Joints
Our team of certified professionals delivers precise, code-compliant heat treatment services across India.
We offer expert Post Weld Heat Treatment solutions to improve the strength and safety of critical welded components—trusted across industries from power to petrochemical.
Precision heating and temperature holding tailored to material specifications and welding codes.
Our clients prefer our on-site PWHT for reducing downtime and ensuring code compliance.
Fast mobilization, setup, and execution minimize project delays.
PWHT contributes significantly to safe operations and extended service life.
Common Questions about PWHT Services.
PWHT is a thermal treatment process applied to welded materials to relieve stresses and improve mechanical properties after welding.
PWHT helps avoid cracking, hydrogen embrittlement, and failure in pressure vessels, pipelines, and structural components.
Materials like carbon steel, alloy steel, and chromium-molybdenum steel often require PWHT depending on thickness and service condition.
No. PWHT is generally required based on material type, thickness, design code, and service application.
Skipping PWHT can result in reduced toughness, cracking, distortion, and non-compliance with codes, risking failure during service.
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Kaztron NDT Pvt Ltd offers certified NDT training and inspection services, helping industries and professionals ensure safety, quality, and compliance through advanced testing techniques.