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Welded steel pipe
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Welded steel pipe is steel or steel plate with the bending deformation of round, square and other shapes and then welded into, the surface of the pipe joints. Welded steel pipe used is steel or steel billets. Steel Pipe Co., Ltd. Liaocheng Jia-bin supply of welded steel pipe manufacturing process is simple, high production efficiency, many varieties of different specifications, equipment, less capital, but the general strength less than seamless. Since the 20th century, 30 years, with high-quality steel rolling production, as well as the rapid development of welding and inspection technology advances, continually raising the quality weld, welding steel pipe increasing number of varieties and specifications, and in a growing number of areas instead of non - Steel Pipe. Than the seamless steel pipe welded steel pipe and low cost, high production efficiency.
Classification
According to the different welding methods can be divided into arc welding, high frequency or low-frequency resistance welding pipes, gas pipe, stove pipe, Bundy tubes.
Welded steel pipe: for oil drilling and mechanical manufacturing.
Furnace pipe: used for water, gas tubes, etc., large diameter longitudinally welded pipes for high pressure oil and gas transportation, etc.; spiral welded pipe for oil and gas transportation, pipe, bridge piers and so on.
Longitudinal seam can be classified according to the shape and spiral welded pipe
Longitudinal: production process is simple, high efficiency, low cost, rapid development.
Spiral Welded Pipe: Longitudinal strength generally higher than high, can use a narrower pipe billet production of larger diameter, you can also use the same width of the billet production of different pipe diameters. However, with the same length of straight seam tube compared to the weld length of 30 ~ 100%, and a lower production rate. Therefore, the smaller diameter pipe actually use straight seam welding, large diameter spiral welded pipe is mostly used.
By end-use is divided into general welded pipe, galvanized pipe, oxygen blowing pipe, wire and tube, metric pipe, roller tube, deep well pipes, automotive tube, transformer tube, welded thin-walled tube, welding Rectangular pipe and spiral welded pipe.
General Pipe: General pipe used to transport low-pressure fluid. With Q195A, Q215A, Q235A steel. Also can be used for other soft easy-to-weld steel. Pipe to conduct water pressure, bending, flattening and other experiments, there are certain requirements for surface quality, usually delivery length is 4-10m, are often asked to cut to length (or double length) delivery. Nominal pipe diameter with the specifications indicated (mm or inches) Nominal size and the actual different pipe wall thickness required of ordinary steel pipe, and two kinds of thicker steel, steel pipe end in accordance with the form is divided into two kinds of thread and without threaded .
Galvanized steel pipe: To improve the corrosion resistance of steel pipe for general steel (clarinet) for zinc. Galvanized steel sub-zinc hot dip galvanized steel and electricity are two kinds of thick hot-dip galvanizing galvanized, electric galvanized low cost.
Oxygen pipe: used for steel-making Oxygen tubes, generally with a small diameter welded steel pipe, size from 3 / 8 inch -2 inch eight kinds. With 08,10,15,20, or Q195-Q235 steel is made. The anti-corrosion and were either aluminized.
Wire Tube: is also a common carbon steel welded pipe for use in a variety of structural concrete and distribution projects, commonly used in nominal diameter from 13-76mm. Wire sets Presentation thin wall, mostly carried out after coating or galvanized to use, require cold bend test.
Metric pipe: Specification with seamless form, with the outside diameter * wall thickness expressed in mm welded steel pipe, with ordinary carbon steel, high-quality carbon steel or low alloy steel & Poor's to tropical, cold with a welding, or welding tropical made after the cold call approach. Metric sub-S & P energy and thin-walled pipe, common for structural parts, such as the drive shaft, or transmission fluid, thin-walled used to produce furniture, lamps, etc., to ensure that steel strength and bending test.
Roller tube: welded steel pipe used for belt conveyor idlers, general use Q215, Q235A, B steel and 20 steel diameter of 63.5-219.0mm. Pairs of tube bending, end with the vertical axis, ellipticity certain requirements, ordinary pressure, and flattening test.
Transformers tube: for the manufacture of transformer cooling tubes and other heat exchangers, using ordinary carbon steel manufacture, require flattening, flaring, bending, hydraulic pressure test. In order to cut to length or double length pipe delivery pipe camber on a set of requirements.
Special Pipes: from ordinary carbon structural steel and 16Mn steel welding system, such as square tubes, rectangular tubes, cap-shaped pipe, empty plastic steel doors and windows with steel pipes, mainly for agricultural machinery components, steel window doors.
Welded thin-walled tube: mainly used to produce furniture, toys, lamps and so on. In recent years, with production of thin-walled tube of stainless steel is widely used, advanced furniture, decoration, fences and so on.
Spiral welded pipe: It's low-carbon carbon structural steel or low alloy steel strip according to a certain point of the spiral (called the forming angle) roll into a tube, and then seam welded pipe is made, it can use a narrow The production of large diameter steel pipe. Spiral welded pipe used in oil and gas pipeline, its specifications with the outside diameter * wall thickness, said. Spiral welded pipe with one-side welding and double-sided welding, the pipe should ensure that water pressure test, tensile strength and cold bending properties of the weld to be complied with.
form: alloy steel pipe |
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发表于 2009-10-20 09:18
发表于 2009-11-23 11:31
