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  2. Low-frequency electric resistance weld - Wikipedia

    en.wikipedia.org/wiki/Low-frequency_electric...

    Current is then passed between the two edges of the steel to heat the steel to a point at which the edges are forced together to form a bond without the use of welding filler material. Initially this manufacturing process used low frequency A.C. current to heat the edges. This low frequency process was used from the 1920s until 1970.

  3. American Cast Iron Pipe Company - Wikipedia

    en.wikipedia.org/wiki/American_Cast_Iron_Pipe...

    American Cast Iron Pipe Company is a manufacturer of ductile iron pipe, spiral-welded steel pipe, fire hydrants, and valves for the waterworks industry, and electric-resistance-welded steel pipe for the oil and natural gas industry.

  4. Steelmaking - Wikipedia

    en.wikipedia.org/wiki/Steelmaking

    Steel mill with two arc furnaces. Steelmaking is the process of producing steel from iron ore and/or scrap.Steel is made from iron and carbon. On its own, iron is not strong, but a low concentration of carbon – less than 1 percent, depending on the kind of steel – gives steel strength and other important properties.

  5. Electric resistance welding - Wikipedia

    en.wikipedia.org/wiki/Electric_resistance_welding

    Current is then passed between the two edges of the steel to heat the steel to a point at which the edges are forced together to form a bond without the use of welding filler material. Initially this manufacturing process used low frequency AC current to heat the edges. This low frequency process was used from the 1920s until 1970.

  6. Pipe (fluid conveyance) - Wikipedia

    en.wikipedia.org/wiki/Pipe_(fluid_conveyance)

    The welding process for ERW pipes is continuous, as opposed to welding of distinct sections at intervals. ERW process uses steel coil as feedstock. The High Frequency Induction Technology (HFI) welding process is used for manufacturing ERW pipes. In this process, the current to weld the pipe is applied by means of an induction coil around the ...

  7. Piping - Wikipedia

    en.wikipedia.org/wiki/Piping

    The material with which a pipe is manufactured often forms as the basis for choosing any pipe. Materials that are used for manufacturing pipes include: Carbon steel; ASTM A252 Spec Grade 1, Grade 2, Grade 3 Steel Pile Pipe; Plastic piping, e.g. HDPE pipe, PE-X pipe, PP-R pipe or LDPE pipe. [11] Low temperature service carbon steel; Stainless steel

  8. Japan's Nippon Steel sets sights on a growing overseas ... - AOL

    www.aol.com/news/japans-nippon-steel-sets-sights...

    The signs at Nippon Steel read: “The world through steel,” underlining why Japan’s top steelmaker is pursuing its $15 billion bid to acquire U.S. Steel. Nippon Steel Corp. has its eyes on ...

  9. Cast iron pipe - Wikipedia

    en.wikipedia.org/wiki/Cast_iron_pipe

    In cast iron pipe, the graphite forms flakes during the casting process, when examined under a microscope. Cast iron pipe was superseded by ductile iron pipe, which is a direct development, with most existing manufacturing plants transitioning to the new material during the 1970s and 1980s. Ductile iron pipe is different than cast iron, because ...

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