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In the city water supply, drainage, heating, gas pipelines and long-distance oil pipelines are mostly buried in the underground, and the factory in the process of the pipeline for the ease of operation and maintenance of more than laying on the ground. Pipeline traffic, supporting, slope and discharge exhaust, compensation, heating, heat preservation and antisepsis and cleaning, painting and other identification and safety, both for the ground or underground laying are im...

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A heat sensitive heat exchanger unit is a hot and cold mixed type direct heat exchange unit, heat transfer efficiency can reach the limit of one hundred percent, the same traditional recuperative heat exchanger such as shell and tube heat exchanger are essentially different, as everyone knows the traditional recuperative heat exchanger due to its own fatal flaw existence: noise and vibration, it is difficult to get a wide range of market promotion and customer identificat...

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Tube shell type heat exchanger with carbon steel, stainless steel and copper, the carbon steel pipe plate in cooler when in use, the tube plate and the tube seam often corrosion leakage, leakage into the cooling water system caused by environmental pollution and material waste. In the manufacture of shell and tube heat exchanger, manual arc welding is commonly used in the welding of tube plate and tube plate. The shape of the weld has different defects, such as depressi...

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The shell and tube heat exchanger is different from the temperature of the fluid inside and outside the tube, and the temperature of the shell of the heat exchanger is different from that of the tube bundle. Two if there is a great difference of temperature change, will produce a great deal of thermal stress in a heat pipe, resulting in bending, fracture, or from the tube plate. Therefore, appropriate compensation measures should be taken to eliminate or reduce thermal st...

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Fake rectangular tube prone to collapse. Fold is the rectangular tube surface formed a variety of broken lines, this defect is often run through the entire product. Folding is due to shoddy manufacturers to pursue high efficiency, pressure amount slants big, produce Erzi, a rolling produced folding, folding products after bending will crack and the strength of steel big decline....

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Shell and tube heat exchanger and tubular heat exchanger. Is to close the bundle in the shell wall as heat transfer surface heat exchanger. The heat exchanger has the advantages of simple structure and reliable operation, and can be used for manufacturing various structural materials (mainly metal materials), and can be used under high temperature and high pressure, and is the most widely used type. structure The shell and tube heat exchanger is composed of a shell, a...

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Metallurgical properties of materials LSAW pipe is steel plate production, and is used in the production of spiral welded pipe hot rolled coil. The rolling process of hot strip mill has a series of advantages, which has the ability of producing high quality pipeline steel. For example, a water cooling system is installed on the output stage to accelerate the cooling, which allows the use of low alloy components to achieve a special strength grade and low temperature tou...

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Submerged arc welding steel pipe material: Q235A, Q23b, 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, Q345 L245 L290 X42 X80 0Cr18Ni11Nb. X46 X70 1. Raw material, steel strip, welding wire, flux. Have to go through strict physical and chemical tests before they are put into the investment. 2. Strip head and tail docking, using single or double wire submerged arc welding, the steel tube rolled by automatic submerged arc welding welding. 3. Before molding, the strip passes thro...

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