Views: 1 Author: Site Editor Publish Time: 2023-12-22 Origin: Site
Steel pipe welding is a widely used process in various industries such as construction, machinery manufacturing, oil, natural gas, hydropower, and chemical. The quality of welded steel pipes directly affects the safety and service life of the project. Therefore, strict acceptance of the quality of steel pipe welding is necessary. In this article, the Carbon steel pipe manufacturer will provide detailed information on the acceptance standards and methods of welded pipes.
1. Acceptance criteria for welded pipes(1) Weld seam forming
Welded steel pipes should ensure complete weld penetration, and there should be no missing welds, weak welds, local poor fusion, etc.
(3) Dimensional deviation
When inspecting welded steel pipes, it should be noted that basic deviations such as pipe diameter, wall thickness, tolerances, and curvature should comply with the requirements of engineering specifications.
(4) Chemical composition
Conduct chemical composition analysis and testing, and the steel pipe weld material should comply with the chemical composition specifications of the steel.
(5) Mechanical properties
The mechanical properties of welded steel pipes should meet the requirements of national or industry standards. Steel pipe welds should be tested for tensile strength, bending strength and hardness values and the results should be checked.
2. Acceptance method of welded pipes(1) Appearance inspection
Standardized testing equipment is used to measure the mechanical properties of electric welded steel pipes from multiple angles to determine whether they meet engineering requirements and standards. Commonly used mechanical property indicators include: strength, plasticity, hardness, impact toughness, fatigue strength, etc.