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  • 2021-10-15

    Threeway Steel is in the conventional austenitic stainless steel, based on strict control of impurities on components made further refined and improved composite - Diverse developed from strengthening means, is dedicated to a new supercritical unit boiler austenitic stainless steel . In this steel,

  • 2021-09-30

    Seamless surface cracks, opening wide outside off who called the opening is narrow, are known as fine as hair hairline. This deficiency is mainly caused by genetic tube surface cracks, but also affect the rate of qualified products mainly seamless. Seamless billet surface cracks causes, with the pro

  • 2021-09-27

    Seamless carbon steel pipe or solid steel ingot is made of the capillary tube through the hole, then through the hot-rolled, cold rolled or cold call is made. Seamless carbon steel pipe in China's steel industry has an important position. Seamless carbon steel pipe material is a round tube, pipe cut

  • 2021-09-26

    SA214 Heat exchanger and condenser erw carbon steel pipeScopeThis standard applies to heat exchangers, condensers and similar heat exchanger and condenser erw carbon steel pipe with a minimum wall thickness. Usually provides steel pipe size outside diameter smaller than 3in (76.2mm), can also provid

  • 2021-09-25

    Steel pipe derusting methods:Tools derusting Mainly use tools such as steel wire brush for surface grinding; it can remove loose or cock of oxide skin, rust, welding slag etc. the effect of Manual tools can achieve Sa3 level, and derusting power tool can achieve Sa3 level. If the oxidized scale adh

  • 2021-09-18

    Inner diameter of seamless steel pipe is more than 6.0mm and wall thickness is less than 13mm annealed seamless steel pipe material, which can be used W-B75 Webster Hardness test with very fast, easy, suitable for rapid non-destructive of the seamless steel pipe material qualified inspection. Inner

  • 2021-09-16

    Requirements on pipe billet for hot-rolled seamless tube is related to and pipe varieties, uses and piercing methods. For general-purpose steel pipe tube quality requirements can be relaxed more, but the quality of important applications of tube steel and high-alloy steel pipe requirements must be s

  • 2021-09-15

    The preheating is total or partial heated during welding work. Usually using medium carbon steel, high carbon steel weldment quench cracking tendency or temperature lower ground conditions, a large difference when welding, as well as the thickness of the weldment need to warm up. purpose of preheati

  • 2021-09-09

    Stainless steel seamless pipe cracks principleCrevice corrosion is a form of localized corrosion crack in the surface sediments or shielded area surface passivation layer destruction. The processing or design cracks in the welding of stainless steel pipe fittingsmouth at the other junction. In effec

  • 2021-09-07

    Pre-precision welding technology is the world's the most advanced technology in large diameter spiral pipe production, also known as the two-step production. The principle is the first step in the pre-welding technology produced fine spiral welding, that is, on a three- roll strip molding machine wh

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