Alloy Steel Butt-Weld Elbows (WP11, WP22, P91, 16Mn, Q355B)

Cangzhou Xinghui Pipeline Equipment Co., Ltd. produces alloy steel butt-weld elbows built to serve high-temperature and high-pressure process piping. Our product lineup covers ASTM A234 WP11, WP22, A335 P91, alongside domestic grades 16Mn and Q355B, manufactured in accordance with ASME B16.9 specifications. Unlike carbon steel fittings, these alloy steel elbows feature outstanding creep resistance, high-temperature tensile strength and oxidation resistance, making them suitable for sustained severe service conditions where conventional carbon steel cannot meet design requirements.

All elbows are manufactured via integral seamless hot push forming. The one-piece forming process removes longitudinal weld seams, eliminating potential weak points under cyclic pressure and thermal load. Wall thickness is maintained consistently across the bend section, while internal and external surfaces are free of folding, lamination and other forming defects. Welding bevels on both ends are precision machined to standard geometry, ensuring full penetration and sound welded joints during site erection. We supply 45°, 90°, 180° elbows in long radius and short radius designs. Standard sizes are readily available, and custom geometries can be fabricated against customer drawings and technical datasheets.

We enforce full-lot traceability and rigorous quality assurance. Raw material mill test certificates are reviewed prior to production. Each finished batch undergoes dimensional verification, hardness measurement, mechanical property testing, and non-destructive examination including ultrasonic testing and magnetic particle inspection to identify subsurface and surface discontinuities. Any units failing inspection will be segregated and rejected to prevent defective goods from being delivered to projects.

Grade selection varies based on operating media and temperature parameters. WP11, WP22 and P91 are widely specified for power station steam pipelines, petrochemical high-temperature process lines. 16Mn and Q355B are preferred for medium-to-low temperature high-pressure piping in coal chemical, heating and general industrial facilities. Our alloy steel butt-weld elbows are extensively applied in thermal power, petrochemical, coal chemical and central heating projects worldwide.

As an experienced pipe fitting manufacturer, we accept bulk orders and customized fabrication. Products are packed following export standards and supplied with complete certification documentation including material test reports and inspection records. We deliver consistent, cost-effective alloy steel piping solutions for engineering contractors and end users across global markets.