The American Petroleum Institute specification API 5L covers seamless and welded steel line pipe.

API 5L X52 Seamless Pipe API 5L X52

Seamless pipes/ tubes, API 5L carbon steel Pipe are made by rolling a preheated billet between offset rolls to create a tube shell. The tube shell is then elongated in a multi-stand rolling mill (with a mandrel) to achieve the desired wall thickness and a limited range of diameters. X52 Tube diameter can also be achieved with a sizing collar, but for significant diameter changes the tube is reheated and passed through a stretch-reducing mill – a multi-stand mill that reduces outside diameter but not wall thickness. The seamless range also includes Oil Country Tubular Goods (OCTG.)

X52 Boiler Tubes/ boiler tubing, the oil and gas industries and automotive transmission components are typical applications.

Welded pipes/ tubes are made from hot rolled or cold reduced strip, sheet or plate. Welded tube includes hollow sections, black and galvanised gas/water pipe, scaffolding tube and large diameter pipe. Small and medium diameters are produced in continuous, multiple-roll mills that progressively bend incoming, unheated strip into a circular cross-section prior to welding along the longitudinal seam. Tube may subsequently be cold-drawn through dies to achieve precise dimensions and finish. Large diameters (400-1,600mm) are made from discrete plate which is welded in an "O" shape before being mechanically or hydraulically expanded. X52 Spiral welded tube/ Pipe is available in diameters up to 2,500mm.

 

 

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We take pride in our ability to provide custom solutions for our customers' unique needs.
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Our factory is committed to upholding the highest standards of safety and quality.
All staff of our company and all departments work together to combine business management, professional technology, quantitative statistical methods and ideological education.
Our Cold-rolled Steel products are known for their durability and reliability.
Relying on the superior conditions and strong advantages of mass production, we are able to meet the different needs of our customers.

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