The spiral welded pipe directly sold by the (Zhongyuan Pipeline Manufacturing Co., Ltd.) spiral welded pipe is made by stacking the low carbon environmental protection carbon steel or low alloy steel chain into the tube blank according to a certain eddy current diagram, and then through the electric welding seam. It can be made from narrow hot rolled strip. Large diameter seamless steel pipe. The key to the spiral welded pipe directly sold by (Zhongyuan Pipeline Manufacturing Co., Ltd.) is the spiral submerged arc welded pipe, which has been widely used in the infrastructure construction of various natural gas pipelines in China, and its specifications are expressed in diameter and wall thickness. The spiral welded pipe directly sold by (Zhongyuan Pipeline Manufacturing Co., Ltd.) has single-sided welding and double-sided welding. The spiral welded pipe shall ensure that the pressure test, welding compressive strength and cold drawing performance meet the requirements.

There are two main types of spiral welded pipe materials sold directly by (Zhongyuan Pipeline Manufacturing Co., Ltd.) Spiral Welded Pipe: Steel and Iron. Iron is divided into pig iron and industrial pure iron. Industrial pure iron has good ductility and good weldability, but poor strength and hardness. Apart from its application in the electrical industry, it has not been widely used in other industrial fields, so most of the iron in daily life refers to pig iron. From the point of view of chemical composition, both steel and pig iron are iron-carbon alloys, and also contain elements such as Si, Mn, P, S, etc., but in different amounts. The 2% carbon content is the dividing point between steel and pig iron. Usually iron-carbon and gold with a carbon content of 2% to 4.5% are called pig iron, iron-carbon and gold with a carbon content of 0.02%-2.0% are called steel, and iron-carbon alloys with a carbon content of less than 0.02% are called steel. for pure iron.

Because steel has good physical and chemical properties and mechanical properties, it can be used for deep processing such as rolling, punching, deep drawing, stamping, deep drawing, etc. Therefore, the spiral welded pipe directly sold by (Zhongyuan Pipe Manufacturing Co., Ltd.) is more useful than pig iron. widely. In addition to casting pig iron used to produce iron castings, about 90% of pig iron used in steelmaking is also smelted into steel to meet the needs of various industries.