The gi steel tube is pre galvanized steel pipe,it can be divided into round pipe,square pipe and rectangular steel pipe.Our sizes can be more accurate,and the tolerance is usually be ±3%.Our products price is also based on actual weight,that means we will weigh the trucks before loading and after loading,then we can get the net weight,customer only pay according to the net weight.Welcome to inquiry and place order.
|Round Tube||Rectangular Tube||Square Tube|
Product Process Feature
(1) The coil plate is made using a four-roller hydraulic machine with hydraulic front and rear brackets. Because the hydraulic bracket can make the long steel plate roll type, with the coil arc holding up, without the crane, gravity deformation is small, tile roll made of good quality.
(2) Galvanized Steel Strip The whole production and transportation group welding process from semi-circle plates made of steel plate to pipe section between installations is in vertical state. It is only lifted in the steel pipe section to the entrance of the drainage channel, ready to enter the hole for installation. Only flip over 90° on the flip platform. This reduces the deformation of the profiled pipe during transportation.
(3) tile, pipe joints, pipe sections are used 3-point balance beam vertical lifting.
(4) The welding preheater uses liquefied petroleum gas burners to directly preheat the weld with flame.
(5) rely on the mold as a thin strip, with a magnetic press along the line set pressure relief set to guide the semi-automatic cutting machine to go, this feeding method can not only meet the accuracy requirements, but also economical and practical.
(6) Zinc-plated steel pipe stiffening rings are made by welding 10 or 9 arc plates per circle. First, a semi-ring is formed by pulling 5 or 4 arc plates on the stiffening ring production platform, and then welded on the steel pipe. Into the ring. With U-shaped accessories spot welding on the wall of the profiled pipe, the jacks are used to press the stiffening ring against the steel pipe.
(7) In addition to the derusting and painting of the inner wall of the steel pipe, other work is performed in the open air.
(8) Non-destructive testing of special-shaped pipes is carried out at various production stations. X-ray inspections are conducted mainly when no one is working at night.
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