Hunan spiral welded pipe price, spiral welded pipe manufacturer, spiral welded pipe anti-corrosion

Spiral
Welded
Pipe
Also known as spiral steel pipe or spiral welded pipe, low carbon structural steel or low alloy structural steel strip is rolled at a certain spiral angle (called forming angle) It is made by forming a tube blank and then welding the tube seams. It can produce large-diameter steel pipes from narrow strips of steel.


Also called a solenoid or spiral body. The outer diameter of the spiral tube is about
nanometers, the inner diameter is about
nanometers, and the distance between adjacent spirals is about
nanometers. Each
circumference of the spiral tube is surrounded by
nucleosomes.

Histones are located on the inner surface of the spiral tube lumen and play an important role in maintaining the structure of the spiral tube. . The
nanofibers composed of nucleosomes spiral to form
nanometer thick fibers, further compressing the
length by
times.

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Spiral pipes are mainly used in oil and natural gas transmission pipelines, and their specifications are expressed by outer diameter
* wall thickness. Spiral pipes are either single-sided or double-sided welded. Welded pipes should ensure that the hydraulic pressure test, tensile strength and cold bending performance of the weld meet the regulations. (
) The raw materials are steel strip coil, welding wire and flux. They must undergo strict physical and chemical inspections before being put into use.

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) The raw materials are steel strip coil, welding wire and flux. They must undergo strict physical and chemical inspections before being put into use.

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) The steel strips are butt-jointed head-to-tail, using single-wire or double-wire submerged arc welding, and automatic submerged arc welding repair welding after being rolled into steel pipes.
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) Before forming, the strip steel is leveled, trimmed, planed, surface cleaned, transported and pre-bent.
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) Electric contact pressure gauges are used to control the pressure of the cylinders on both sides of the conveyor, ensuring smooth conveying of strip steel.
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) adopts external control or internal control roller forming.