Nanchang galvanized welded pipe丨Jiangxi straight seam welded pipe price丨Jiangxi straight seam welded pipe size specification table

< . Classified by use
. . According to use, it is divided into general
. Welded pipe
. ,
. Galvanized welded pipe
., oxygen blown welded pipe, Wire casing, metric welded pipe, roller pipe, deep well pump pipe, automobile pipe, transformer pipe, electric welded thin-wall pipe, electric welded special-shaped pipe and
. Spiral welded pipe
.
. . General welded pipe: General welded pipe is used to transport low-pressure fluid. Made of < r< , < r< , < r3< steel. It can also be made of other mild steels that are easily weldable. Steel pipes need to undergo hydraulic pressure, bending, flattening and other experiments, and have certain requirements for surface quality. Usually the delivery length is < < and often required to be delivered in fixed length (or multiple lengths). The specifications of welded pipes are expressed in nominal diameter (millimeters or inches). The nominal diameter is different from the actual. According to the specified wall thickness, there are two kinds of welded pipes: ordinary steel pipes and thickened steel pipes.
. . Galvanized steel pipe
. In order to improve the corrosion resistance of steel pipes, general steel pipes (black pipes) are galvanized. Galvanized steel pipes are divided into two types: hot-dip galvanizing and electric steel zinc. Hot-dip galvanizing has a thick zinc layer and electro-galvanizing has low cost.
. . Oxygen blowing welded pipe: used as a pipe for oxygen blowing in steelmaking. Generally, small diameter welded steel pipes are used, with eight specifications: < r3/< inch < < inch. Made of < r< , < r< , < r< , < r< or < 3< steel strip. To prevent corrosion, some are aluminized.
. . Wire casing: It is also an ordinary carbon steel electric welded steel pipe. It is used in concrete and various structural power distribution projects. The commonly used nominal diameter is from < r3-<. The wire sleeve has a thin wall and is mostly used after being coated or galvanized, requiring a cold bending test.
. . Metric welded pipes: Specifications are in the form of seamless pipes, welded steel pipes expressed in outer diameter < r*< wall thickness in millimeters, made of ordinary carbon steel, high-quality carbon steel or general low alloy steel with tropical, Cold strip welding, or hot strip welding and then cold drawing. Metric welded pipes are divided into general-purpose and thin-walled pipes. They are generally used as structural parts, such as transmission shafts, or to transport fluids. Thin-walled pipes are used to produce furniture, lamps, etc. The strength and bending test of the steel pipe must be ensured.
. . Idler tube: used for belt conveyor roller electric welded steel pipe, generally made of < r< , < r3< , < < steel and < r< steel, diameter < r3.<. There are certain requirements for the curvature of the pipe, the end face to be perpendicular to the center line, and the ovality. Generally, water pressure and flattening tests are performed.
. . Transformer tube: used to manufacture transformer heat pipes and other heat exchangers. It is made of ordinary carbon steel and requires flattening, flaring, bending and hydraulic testing. Steel pipes are delivered in fixed lengths or multiple lengths, and there are certain requirements for the bending of the steel pipes.
. . Special-shaped pipes: square pipes, rectangular pipes, hat-shaped pipes, steel pipes for hollow rubber steel doors and windows welded from ordinary carbon structural steel and << equal steel strips, mainly used as agricultural machinery components, steel windows and doors wait.
. . Electrically welded thin-walled tubes: mainly used to make furniture, toys, lamps, etc. In recent years, thin-walled tubes made of stainless steel strips have been widely used in high-end furniture, decorations, fences, etc.
. Spiral welded pipe
. Low carbon structural steel or low alloy structural steel strips are rolled into pipe blanks at a certain spiral angle (called forming angle), and then the pipe seams are welded Made of steel, it can produce large-diameter steel pipes from narrower strips of steel. Spiral welded pipes are mainly used for oil and natural gas transmission pipelines, and their specifications are expressed by outer diameter < r* < wall thickness. Spiral welded pipes are either single-sided or double-sided. Welded pipes should ensure that the hydraulic pressure test, tensile strength and cold bending performance of the weld meet the regulations.
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. Various models and specifications are complete, and can also be customized according to customer requirements
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