Seam And Seamless Steel Pipes

Seam steel pipe refers to the strip or plate bending round, square and other shapes and then welded into the surface of the steel pipe seams. Seam pipe are used in the blank plate or strip. By welding methods can be divided into arc welded pipe, high-frequency or low frequency electric resistance welded pipe, gas pipe, stove pipe, Bundy tubes
Seamless steel pipe is a hollow cross-section, no seams around circular, square, rectangular steel. Seamless steel ingot is made of perforated or solid through the capillary tube, and then by the hot-rolled, cold-rolled or cold call is made. Seamless hollow sections, widely used as transportation and other fluids, steel pipe and solid steel bar compared to the sametorsional strength in bending, lighter, is an economic cross-section steel, widely used in the manufacturer structure parts an mechanical parts, such as drill pipe, automotive drive shafts, bicycle frames and construction using steel scaffolding. Seamless steel pipe production process: hot-rolled, hot expanded, cold drawn, cold rolled, and centrifugal casting seamless.
Seam pipe and seamless pipe processing of form based division, seam welded steel pipe generally, there are cold-drawn and hot rolled seamless steel tubes in two ways.

Difference between seam and seamless pipe:
1, Seam pipe generally able to withstand the maximum working pressure less than 20kg, which is the safest rang. It is generally used for water, gas, compressed air and other low pressure fluid;
2, Seamless pipe can withstand high pressure, of course, the wall thickness will also increase pressure requirements that need to be designed. It is generally used for equipment using high-pressure tubing, high temperature and pressure boiler tubes. There are also structural seamless pipe, which demanded to see the design.
3, Currently there are some pipe joints of pipe seamless process, which is to weld annealing treatment, eliminating the residual stress of the weld, the weld and base metal rather, its pressure range ofbasic and seamless quite. It may also be considered
4, The market also has a number of uses pipe joints after redrawing overall heating or seamless cored head rolling, mainly the small size of the main tubes are seamless belong only in appearance, its essence and not very good.