Development and Implementation of Welding Procedure Qualification Records (PQR) and Welding Procedure Specifications (WPS) – Pressure Vessels | Heat Exchangers | Reaction Vessels | Separation Equipment | Storage Equipment | Nantong Saifu Machinery Equipment Co., Ltd. – In modern industrial manufacturing, welding is one of the standard techniques used to join metallic materials.

Case study: A shipyard discovered linear defects during ultrasonic testing (UT) of a test piece following welding. Analysis revealed that the defects were caused by excessive welding speed, resulting in lack of fusion. After adjusting the speed, the weld was re-performed and passed the assessment. Scope: A single WPS may be supported by multiple PQRs.

Case study: A shipyard discovered linear defects during ultrasonic testing (UT) of a test piece following welding. Analysis revealed that the defects were caused by excessive welding speed, resulting in lack of fusion. After adjusting the speed, the weld was re-performed and passed the assessment. Scope: A single WPS may be supported by multiple PQRs.

Case study: A shipyard discovered linear defects during ultrasonic testing (UT) of a test piece following welding. Analysis revealed that the defects were caused by excessive welding speed, resulting in lack of fusion. After adjusting the speed, the weld was re-performed and passed the assessment. Scope: A single WPS may be supported by multiple PQRs.

焊接工艺评定（PQR）是验证焊接工艺可行性的关键环节，它通过标准化试验和严格检测，确保焊接接头满足设计要求，是保障设备安全、提升产品质量的核心步骤。