A Welding Procedure Specification (WPS) is a detailed document that defines the welding process, materials, parameters, and techniques required to produce a weld that meets the design, code, and quality requirements of a project. At Expert Inspect, we develop, verify, and implement WPS to ensure that all welding operations, from fabrication to installation, are performed consistently, safely, and to the highest industry standards.
The WPS outlines critical information such as base material type, filler metal specification, joint design, welding position, preheat and interpass temperatures, welding parameters (current, voltage, travel speed), and shielding gas requirements. By providing clear guidance to welders and inspectors, a WPS ensures that each weld is produced with predictable mechanical and metallurgical properties.
Welding Procedure Specifications are essential for industries where structural integrity, pressure containment, and safety are paramount, including oil & gas, petrochemical, power generation, marine, and heavy manufacturing. They serve as the baseline for both production welding and Welding Procedure Qualification Records (WPQR), which certify that a procedure is capable of producing acceptable welds under specified conditions.
At Expert Inspect, we prepare WPS documents in strict compliance with recognized industry codes and standards, such as ASME Section IX, AWS D1.1/D1.6, ISO 15614, and API 1104, depending on the application and project requirements. Each WPS is tailored to the specific materials, welding processes, and joint configurations used in the project.
Our WPS services include procedure development, qualification, verification, and documentation. We work closely with project engineers, welders, and quality teams to ensure the WPS is practical, compliant, and achievable in the field or workshop. This minimizes errors, ensures repeatability, and enhances the overall quality of welded assemblies.
In addition to guiding welders, the WPS serves as a reference for in-process inspection and post-weld NDT, allowing inspectors to verify compliance with specified parameters and ensure that the weld meets mechanical, metallurgical, and dimensional requirements.
Expert Inspect also provides training and support for welding personnel to ensure correct interpretation and implementation of the WPS. This includes demonstrating proper welding techniques, monitoring parameter control, and advising on preheat, interpass, and post-weld treatment procedures where applicable.
By implementing a well-defined Welding Procedure Specification, organizations can ensure consistent weld quality, reduce rework, maintain regulatory compliance, and improve safety and reliability across all welding operations. Expert Inspect’s WPS services provide the foundation for high-quality, code-compliant welding projects, giving clients confidence in the integrity and performance of every welded joint.
