Materials commonly used by LSAW steel pipe are: Q235A, Q235C, Q235B, 16Mn, 20 #, Q345, L245, L290, X42, X46, X60, X80, 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb and so on.
LSAW steel pipe in the country mainly used in water projects, petrochemical industry, chemical industry, power industry, agricultural irrigation, urban construction. For liquid delivery with: water supply, drainage. For gas transportation with: gas, steam, liquefied petroleum gas. For the structure with: for piling pipe, for the bridge; terminal, road, building structure and so on.
It is divided into general straight seam welded pipe, galvanized pipe, oxygen blowing pipe, wire casing, metric pipe, roller tube, deep well pump tube, automobile pipe, transformer tube, welded thin wall tube, welded pipe and spiral welded pipe.
General LSAW steel pipe: general LSAW steel pipe is usually used to transport low pressure fluid. Manufactured with Q195A, Q215A, Q235A steel. It can also be made of other mild steel that is easy to weld. Steel pipe has to be water pressure, bending, flattening and other experiments, the surface quality has certain requirements, delivery length is usually 4-10m, often requires cuttolength (or double length) delivery. The specifications of the welded pipe are denoted by nominal caliber (mm or inch). Nominal caliber is different from the actual one. The welded pipe has two kinds of ordinary steel pipe and thickened steel pipe according to the stipulated wall thickness. The pipe is divided into two types: pipe end and thread.
Galvanized steel pipe: In order to improve the corrosion resistance of steel pipe, the general steel pipe (black tube) for galvanizing. Galvanized steel pipe is divided into hot galvanized and cold galvanizing, zinc coating of hot galvanized is thickness, the cost of cold galvanizing is low.
Oxygen blowing pipe: Pipe manufacturer generally use small diameter welded steel pipe to produce steel blowing oxygen tube, specifications of it are from 3/8 inch -2 inch eight. Made with 08,10,15,20 or Q195-Q235 steel strip. For the erosion, some of those will do aluminizing treatment.
Wire casing: that is, ordinary carbon steel welded steel pipe, that is used in concrete and various structural distribution works, commonly used nominal diameter is from 13-76mm. The wire jacket wall is thinner, mostly coated or galvanized before use, and it requires a cold bending test.
Metric Welded Pipe: Specially used as a seamless pipe, it is the welded steel pipe that expressed by outer diameter * wall thickness mm, welded by the hot or cold belt of ordinary carbon steel, high quality carbon steel or general energy low alloy steel, cold zone welding. And then made by cold dial method. Metric welded pipe can be used for structural furniture, such as drive shaft, or conveying fluid, thin wall used to produce furniture, lamps, etc., to ensure that the strength of steel and bending test.
Roller tube: for belt conveyor roller welding steel pipe, generally use Q215, Q235A, B steel and 20 steel to manufacture, diameter is 63.5-219.0mm. It certain requirements on the tube bending, the end to the vertical line with the center line, the oval, and generally it must do water pressure and flattening test.
Transformer tube: used in the manufacturing transformer heat pipe and other heat exchangers, use ordinary carbon steel to manufacture, requires crushing, flaring, bending, hydraulic test. Steel pipe to the length or double the delivery, the bending degree of steel pipe have certain requirements.
Shaped LSAW steel pipe: made by ordinary carbon structural steel and 16Mn straight seam welded pipe and other square tube, rectangular tube, cap tube, air plastic steel doors and windows with steel pipe, mainly used for agricultural machinery parts, steel windows and so on.
Welded thin-walled tube: mainly used for the production of furniture, toys, lamps and so on.