无缝对焊管件

无缝对焊管件总览：弯头、三通、异径管、管帽，按 ASME B16.9 / B16.28 / MSS SP-75 / GB/T 12459 制造，适用于低压至高压（含 B31.3 Chapter IX）管道项目。

产品描述

无缝对焊管件覆盖弯头、三通、异径管、管帽四类管道连接件，全部按 ASME B16.9（NPS 1/2–48 长半径）、ASME B16.28（短半径 NPS 1/2–24）、MSS SP-75 / ASTM A860（WPHY 高强度低合金）、GB/T 12459 等标准制造。弯头用于管道转向，常见 45°/90°/180°，弯曲半径按 B16.9 标准 1.5D 长半径或 1.0D 短半径；三通用于主管分支，分等径与异径；异径管用于不同管径过渡，分同心与偏心；管帽用于管端封闭，常见椭圆封头。所有管件与同材质对焊钢管按坡口对焊连接，材质、规格、热处理状态按图纸或询盘确认。

引用标准

• ASTM A234
  Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service
  ASTM International
• ASTM A403
  Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings
  ASTM International
• ASTM A420
  Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature Service
  ASTM International
• MSS SP-75
  Specification for High-Test, Wrought, Butt-Welding Fittings
  Manufacturers Standardization Society (MSS)