Direct sales of spiral welded pipes
2022-05-07
By (Zhongyuan Pipeline Manufacturing Co., Ltd.) Direct sales of spiral welded pipes Spiral welded pipe is manufactured by helically winding low‑carbon, environmentally friendly carbon steel or low‑alloy steel strips into a tube blank according to a specific spiral pattern, followed by electric‑resistance welding along the seam. It can be produced from narrow hot‑rolled strip steel and is used to make large‑diameter seamless steel pipes. Manufactured by Zhongyuan Pipeline Manufacturing Co., Ltd. Direct sales of spiral welded pipes The key to spiral welded pipe is spiral submerged-arc welded pipe, which has been widely used in China for the construction of various natural gas pipelines. Its specifications are expressed in terms of diameter and wall thickness. Manufactured by Zhongyuan Pipeline Manufacturing Co., Ltd. Direct sales of spiral welded pipes Spiral welded pipes are available in single-sided and double-sided welding configurations. Spiral welded pipes shall undergo pressure testing, and their weld compressive strength and cold-drawing performance must meet the specified requirements.
By (Zhongyuan Pipeline Manufacturing Co., Ltd.) Direct sales of spiral welded pipes Spiral welded pipe materials fall into two main categories: steel and iron. Iron is further divided into pig iron and industrial pure iron. Industrial pure iron exhibits good ductility and weldability, but its strength and hardness are relatively poor. Aside from applications in the electrical industry, it has not found widespread use in other industrial sectors; thus, most of the iron encountered in everyday life refers to pig iron. From a chemical composition standpoint, both steel and pig iron are iron–carbon alloys that also contain elements such as silicon, manganese, phosphorus, and sulfur, though in varying proportions. A carbon content of 2% serves as the dividing line between steel and pig iron. Generally, iron–carbon alloys with a carbon content of 2% to 4.5% are classified as pig iron, those with 0.02% to 2.0% carbon are called steel, and alloys containing less than 0.02% carbon are referred to as pure iron.
Due to its excellent physicochemical and mechanical properties, steel can be subjected to advanced processing techniques such as rolling, punching, deep drawing, stamping, and other forming operations; therefore, it is produced by Zhongyuan Pipeline Manufacturing Co., Ltd. Direct sales of spiral welded pipes The applications of spiral welded pipes are more extensive than those of pig iron. With the exception of pig iron used for casting, approximately 90% of the pig iron employed in steelmaking is further refined into steel to meet the demands of various industries.
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