Straight seam welded pipe
Straight seam welded pipe is made of steel plate or steel strip after bending forming, and then through welding. Divided into the form of the weld seam welded pipe and spiral welded pipe by the welding forming method. According to the application, the straight seam weld pipe can be divided into general welded pipe, galvanized welded pipe, oxygen blowing metric welded pipe, welded pipe, wire casing, roller tube, deep well pump pipe, auto tube, transformer, electric welding thin wall pipe, welded pipe and spiral welded pipe.
General welded pipe is used to transfer low pressure liquid. It is made of Q195A, Q215A, Q235A steel and it can also be made of other mild steel. Steel pipe should have the text on pressure, bending, flattening and so on, and it has a certain request on the surface quality. Usually, the delivery length is 4 to 10m, often required scale (or foot) delivery of the goods. The specifications of the welded pipe always show with nominal diameter (mm or inches), and the nominal diameter is different from the actual. According to the regular thickness wall, the welded pipe has two kinds including ordinary steel pipe and thickening steel pipe, and distinguish by the end point, the steel pipe can be divided to pipe with thread and no-thread pipe.
No need for welding machine and wire resistance high frequency straight seam welded pipe set, also do not need to do across the ground, do not need to brush paint, eliminating the traditional fusion welding and other complex construction process. Simply connecting pipe and tube, straight tube joint thread round steel tube theory weight and junction box, pipe joint positioning after tight (wring) screw with specialized tools, and high frequency resistance seam welding junction box with a lock the mother can be set. Pipeline bends can be made to the requirements with pipe bender to the certain situation.
The characteristics and usage of the spiral pipe
Spiral pipe is used in industry, also known as spiral steel pipe or spiral welded pipe, and it is to roll the low carbon structural steel and low alloy steel strip to tube according to certain helix angle, and then welded pipe joints. Let me introduce you the characteristics and the usage of the spiral pipe.
The characteristics of the spiral tube is as follows:
Seam welded pipe production technology is simple with high production efficiency, low cost and rapid development. The strength of the spiral welded pipe is generally higher than straight seam welded pipe, and can adopt a narrow billet to produce larger diameter welded pipes, and it can also use the billet with the same width to produce the different pipe diameter welded pipe. But compared with the same length of straight seam pipe, its weld length increased by 30 ~ 100%, and the production speed is low. As a result, small diameter welded pipe are mostly with straight seam welding, large diameter welded pipe for the most part adopts spiral welded.
The main application of the spiral pipe:
Spiral pipe is mainly used in water engineering, petrochemical industry, chemical industry, power industry, agricultural irrigation, urban construction, and it is is one of 20 key products of our country’s development.
For liquid transportation: water supply, water drainage, sewage treatment engineering, transmission of mud, sea water.
For gas, gas, steam, liquefied petroleum gas.
For structure: piling pipe, bridge;Dock, road, building structure pipe, Marine piling pipe, etc.
Spiral pipe is more easily corrosion, so it need to have regular derusting processing in order to ensure the normal use of spiral pipe.
