• Post time: 12-16-2020

    The reason of seamless steel pipe wall thickness deviation in production mainly reflected in some ways: Process of punch hole deviation Since puncher m the head with a perforated plunger between the first support frame centering rollers cantilever structure is formed, so that the head during pie...Read more »

  • Post time: 12-15-2020

    Black steel pipe(Uncoated steel pipe) is called “black” because of the dark-colored iron-oxide scale formed on its surface; usually used for low-pressure hot-water heating Its available in two schedules (schedule 40 and schedule 80). The difference between the two schedules is the wa...Read more »

  • Post time: 12-10-2020

    How to identify the stainless steel tube First, magnetic test Magnetic test is the easiest way to distinguish annealed austenitic stainless steel and ferritic stainless steel. Austenitic stainless steel is non-magnetic, but after heavy reduction will have a mild cold magnetism; and pure chromium...Read more »

  • Post time: 12-08-2020

    LSAW steel Pipe O.D: ®323.8~©1822.4mm Pipe Length: Max.l2.2m(40ft) Wall Thickness: When the steel grade is X70, the wall thickness ranges from 6.4 to 26.4mm(0.252-1.04in); When the steel grade is lower, the wall thickness will be increased accordingly Product Standard: ISO3183-3; API Spec 5L, GB9...Read more »

  • Post time: 12-04-2020

    Seamless pipe pickling defects In addition to hydrogen pickling iron oxide skin peeling effect, but also to the internal base slab diffusion and impurities or pores of the aggregate, result in increased stress, lower plasticity of steel, increase the brittleness of steel, this effect is called hy...Read more »

  • Post time: 12-02-2020

    API 5L is a standard of API 5L line pipe. Specifications for API 5L adhere to the International Organization for Standardization ISO 3183 The API 5L specification provides standards for pipe suitable for use m conveying gas. water, and oil in the natural gas and oil Industries. The API SPEC 5L co...Read more »

  • Post time: 12-01-2020

    Black ERW steel pipe is hot-rciled coil through the molding machine, the use of high-frequency current skin effect and proximity effects, so that the edge of the tube heating and melting, in the rcie of squeeze roller pressure welding to achieve production. Black ERW steel pipe, compared with ord...Read more »

  • Post time: 11-27-2020

    Hydraulic tube appropriately join one or more alloying elements on the basis of high-quality carbon structural steel, used to improve the strength of steel, toughness and hardenability performance. Type of steel made, usually quenched and shall be subject to the chemical heat treatment, surface h...Read more »

  • Post time: 11-26-2020

    Welded steel pipe or plate are commonly welded by means of bent round, we can weld the steel into square and other shapes and then welded into the surface of the DSAW stee: pipe seam. Steel plate or steel pipe is used in the blanks of welded steel. We can use electric arc welded pipe, high or !o...Read more »

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