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A335 P5/P9/P11/P22/P91/P92 PIPES

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A182/F5/F9/F11/F22/F91/F92 FLANGES

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Stocking, processing,
and delivering steel piping products

A335 P91 Pipe Material Welding

A335 P91 welding. A335 P91 is a medium alloy heat-resistant steel produced in accordance with the United States ASME standard, part of 9Cr-1MoV steel, an improved 9Cr-1Mo steel, which is essentially based on theoriginal P9 steel with enhanced elements V,

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Installation of A335 P11 Alloy Steel Pipe

A335 P11 Welding Procedure. A335 P11 is an alloy steel code issued by the ASTM (ASTM). The nominal component is 25Cr-0.5Mo. The mechanical properties of P11 alloy steel tubes are of great significance to ensure the safe operation of chemical plants

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Our Customers


We cater to the pipe fitting needs of Oilfields and Power Plant projects. Serving Middle East and Central American clients since 2006, we have earned our reputation as top-ranking pipe fittings exporters. We can provide you with exceptional prices of parts and petroleum manufacturing equipment like pipe fittings and flanges. In addition, we also ship our petroleum pipe fitting parts to Latin American customers.

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Hebei Zhongji offers extensive experience, unsurpassed expertise, and unmatched manufacturabilty to refineries around the world. Since 2002, we have been supplying refineries with top quality, hard-to-find forgings, fittings, and flanges. As an experienced manufacturer of commodity flanges and fittings, we know how to provide the products you need without any hassle.

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Petrochemical Plants

Our production, relevant pipings, fittings and flanges, is intended for chemical and fertilizer plants, petrochemical plants, offshore platforms, thermoelectrical power stations and refinery. The quality assurance service acts in conformity to the ASME and ISO regulations and warrants an absolute conformity of the product to the contract requirements.

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Powder Generation

With many years experience supplying power generation projects across the world, we understand the complexities of supplying technically challenging, quality products to a wide range of global power plants. Whether you’re building a new power generation plant or upgrading an old plant to new standards, Hebei Zhongji can provide the high pressure high temperature-rated materials and project management needed to ensure your project operates flawlessly from engineering to start-up.

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