General welded pipe: general welded pipe is used to transport low pressure fluid. Made of Q195A, Q215A, Q235A steel. Can also be easy to weld other soft steel manufacturing. Steel pipe to water pressure, bending, flattening and other experiments, there are certain requirements for surface quality, usually delivery length of 4-10m, often require fixed-foot (or times the foot) delivery. Welded pipe specifications expressed in nominal caliber (millimeters or inches) nominal caliber is different from the actual, welded pipe according to the specified wall thickness of ordinary steel pipe and thickening of two kinds of steel pipe according to the form of the pipe end is divided into two kinds of threaded and unthreaded.
Galvanized steel pipe: in order to improve the corrosion resistance of steel pipe, the general steel pipe (black pipe) is galvanized. Galvanized steel pipe is divided into hot-dip galvanized and electro-galvanized two kinds of hot-dip galvanized galvanized layer is thick, electro-galvanized low cost.
Oxygen blowing welded pipe: used as a steel blowing oxygen pipe, generally with a small diameter welded steel pipe, specifications from 3/8 inch -2 inch eight. Made of 08, 10, 15, 20 or Q195-Q235 steel strip. In order to prevent corrosion, some of the aluminum treatment.
Wire casing: that is, ordinary carbon steel welded steel pipe, used in concrete and a variety of structural power distribution projects, commonly used nominal diameter from 13-76mm. wire casing pipe wall is thin, most of the coating or galvanized for use after the requirement of cold bending test.
Metric welded pipe: specifications used as a seamless pipe form, with the outer diameter * wall thickness in millimeters, said the welded steel pipe, with ordinary carbon steel, high-quality carbon steel or universal low alloy steel hot strip, cold strip welding, or hot strip welded and then made by cold dialing method. Metric welded pipe is divided into universal and thin-walled, ordinary used as structural parts, such as drive shafts, or to transport fluids, thin-walled used to produce furniture, lamps and lanterns, etc., to ensure the strength of the steel pipe and bending test.
Shaped pipe: square pipe, rectangular pipe, cap-shaped pipe, hollow rubber steel doors and windows with steel pipe welded by ordinary carbon structural steel and 16Mn and other steel strip, mainly used as agricultural machinery components, steel windows and doors.
Welded thin-walled tube: mainly used for making furniture, toys, lamps and lanterns. In recent years, the thin-walled tube made of stainless steel belt is widely used, advanced furniture, decoration, fences and so on.
Spiral welded pipe: is a low carbon carbon structural steel or low alloy structural steel steel strip according to a certain angle of the helix (called the molding angle) rolled into a billet, and then welded the pipe seam made of it, it can be a narrower strip to produce large-diameter steel pipe. Spiral welded pipe is mainly used for oil and natural gas transportation pipelines, its specifications are expressed in terms of outer diameter * wall thickness. Spiral welded pipe has a single-side welding and double-sided welding, welded pipe should ensure that the hydrostatic test, the tensile strength of the weld and the cold bending performance to comply with the provisions.
What is the difference between seamless pipe and welded steel pipes?
1, appearance, seamless steel pipe and welded pipe difference in the welded steel pipe inner cavity has welded rib, and seamless splicing is not.
2, Seamless steel pipe working pressure is higher, welded steel pipe is generally in 10 up and down MPa
3, Seamless steel pipe is in the cold rolled in a one-time molding, welded pipe must be welded from, generally have spiral welding and straight welding.
4, seamless steel pipe can be used as transportation fluid mechanics pipeline, such as crude oil, natural gas, water, liquefied gas, steam, etc. In addition, in the bending, torsion and compressive strength of the same, the net weight of the light, commonly used in the production of manufacturing machinery parts and construction of engineering projects, but also often strategic weapons, rifling of the barrels of guns, bullets and so on.
5, the molding process is not the same. Seamless pipe in the pressure higher than ordinary steel pipe, commonly used in high-pressure machinery and equipment.
Post time: Apr-27-2025
