WELDING ENGINEERING SERVICES – WPS, PQR, WELDER QUALIFICATION & PWHT

1. Introduction to Welding Engineering Services

Welding Engineering plays a critical role in ensuring the quality, safety, and reliability of welded structures across major industries such as oil & gas, power generation, petrochemical, mechanical fabrication, and industrial construction. To meet international standards and project requirements, companies must properly implement WPS (Welding Procedure Specification), PQR (Procedure Qualification Record), Welder Qualification, weld inspection, and Post Weld Heat Treatment (PWHT).

We provide comprehensive welding engineering solutions, fully compliant with ASME Section IX, AWS D1.1, ISO 9606, EN ISO 15614, from procedure development, mechanical testing, welder training, to heat treatment and certification.

2. WPS Development – Welding Procedure Specification

A WPS defines the essential welding parameters required to produce high-quality welds.

✔ Scope of Service:

Analyze base materials, joint design, thickness, and welding positions.

Select suitable welding processes: SMAW, GTAW, GMAW, FCAW, SAW.

Prepare WPS documents according to ASME IX, AWS D1.1, ISO, EN.

Optimize parameters to improve productivity and welding quality.

3. PQR – Procedure Qualification Record

PQR verifies that the proposed WPS can produce welds meeting applicable mechanical and metallurgical requirements.

✔ Scope of Service:

Perform mechanical tests: tensile test, bend test, impact test, macro examination, hardness test.

Metallurgical evaluation of weld structure and heat-affected zone.

Prepare complete PQR reports according to international standards.

Support TPI (Third-Party Inspection) approval: BV, LR, ABS, DNV.

4. Welder Training & Qualification

Skilled welders are essential to ensure consistent weld quality and safe field operations.

✔ Training Programs:

SMAW 3G/4G/5G/6G

GTAW/TIG (stainless steel, carbon steel, alloy steel)

GMAW/MIG/MAG

FCAW & SAW

✔ Certification Options:

ASME Section IX Welder Qualification

AWS D1.1 Welder Qualification

ISO 9606 Certification

✔ Evaluation and Testing:

Practical skill assessment

Weld inspection: VT, MT, PT, UT

5. PWHT – Post Weld Heat Treatment

PWHT enhances weld integrity by reducing residual stress and improving metallurgical structure.

✔ PWHT Services:

Develop PWHT procedure: heating rate, soaking temperature, cooling rate.

Monitor temperature using calibrated thermocouples and digital equipment.

Provide heating charts, PWHT logs, and acceptance reports for QA/QC documentation.

6. Benefits of Professional Welding Engineering Support

Full compliance with ASME, AWS, ISO, and EN standards

Improved weld quality and reduced repair rates

Optimized productivity and lower welding costs

Enhanced equipment lifetime and reliability

Better acceptance from third-party inspectors and project owners