①General boiler steel tubes are mainly used to manufacture water wall tubes, boiling water tubes, superheated steam tubes, superheated steam tubes for locomotive boilers, large and small smoke tubes, and arch brick tubes, etc.②High-pressure boiler steel tubes are mainly used to manufacture superheat

1. Indefinite length (usually length)The length of galvanized seamless pipes is generally different in length, which is called indefinite length within the range specified by the standard. Indeterminate length is also called normal length (pass length). For example, 159*4.5 galvanized seamless pipe

Welding method: When welding thick-walled steel pipes, first clean the oil, paint, water, rust, etc. of the weld joints, and then open the bevel according to the wall thickness. It is the gap between the products, which is generally 1-1.5 times the diameter of the welding rod or wire. If the groove

The weld seam of the spiral steel pipe is longer than that of the straight seam steel pipe. If the pipe length is L, the weld seam length is L/cos(θ). However, most of the defects of steel pipes are concentrated in the weld seam and the heat-affected zone. The long weld seam means that the probabili

The welding of galvanized steel pipe should pay attention to:1. Galvanized steel pipes with a pipe diameter greater than 100mm should be connected by flanges or ferrule-type special pipe fittings.2. For the weld between galvanized steel pipe and flange, to ensure the welding quality, the weld joint

Classified by the process - gas-shielded welded pipe, arc welded pipe, resistance welded pipe (high frequency, low frequency)Classification by weld seam - straight seam welded pipe, spiral welded pipeClassified by section shape - round steel pipe, rectangular pipeClassification by wall thickness - t

(1) Raw materials are strip steel coils, welding wires, and fluxes. Before putting into use, they must go through strict physical and chemical tests.(2) The head-to-tail butt joint of strip steel adopts single-wire or double-wire submerged arc welding, and automatic submerged arc welding is used for

The variety of surface processing of stainless steel broadens its application field - different surface processing makes the surface of stainless steel different, making it unique in application. Surface finishing of stainless steel is important for many reasons in architectural applications.Corrosi

With the continuous development of my country's economy, the country vigorously develops the energy industry. Long-distance oil and gas pipelines are an important way of energy protection. During the anti-corrosion construction process of oil (gas) pipelines, the surface treatment of steel pipes is

Large-diameter steel pipes are also called large-diameter galvanized steel pipes, which refer to welded steel pipes with hot-dip or electro-galvanized layers on the surface of large-diameter steel pipes. Galvanizing can increase the corrosion resistance of steel pipes and prolong their service life.