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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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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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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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Refers to the boiler tube open at both ends and has a hollow section, the length of the periphery of the large steel, according to the production method can be divided into seamless and welded steel pipe, steel pipe size specifications (such as diameter or length) and wall thickness, the size of a wide range of large caliber pipe from small diameter the capillary diameter up to several meters until. Steel pipe can be used in pipe, thermal equipment, mechanical industry, p...

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Boiler tubes are mainly imported from Japan, germany. Often imported specifications are 2734.0mm; 15914.2mm; 219.110.0mm; 41975mm; 406.460mm, etc.. The smallest size is 31.84.5mm, the length is generally 5 ~ 8m range. In the case of import claim, Germany imported ST45 mannasiman steel pipe seamless boiler tube, the ultrasonic inspection survey, found that the internal defects of steel pipe factory more than the small part of the German Steel Association standards and re...

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Connections between pipes, pipe couplings, valves and equipment, and the connection between the pipe, the nature of the fluid, the pressure and temperature, and the pipe material, dimensions and installation sites, and other factors. There are 4 main methods, such as threaded connection, flange connection, socket connection and welding: Threaded connection: mainly suitable for small diameter pipe. When connecting, generally want to be in the thread connection part wrapp...

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In recent years, the application of pile driving around the common, more and more large pile diameter, pile pipe has been produced to 3620mm, in the coastal, river, Lake area is widely used. Offshore deepwater wharf project in domestic coastal has been large-scale construction, pile foundation and main bearing capacity as deep-water wharf, commonly used spiral weld of large diameter steel pipe pile. In addition, the repair of bridges, roads, high-rise buildings are requir...

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Pipe is a device for conveying gas, liquid or fluid with solid particles, which is connected with a pipe, a connecting piece and a valve. Usually, the fluid is pressurized by air blower, compressor, pump and boiler, which can be used to the low pressure from the high pressure of the pipeline. Pipeline is widely used in water supply, drainage, heating, gas supply, long-distance transport of oil and natural gas, agricultural irrigation, hydraulic engineering and a variety o...

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Thin wall steel tube is the ratio of outside diameter and wall thickness of steel pipe is more than 20. Thin-walled steel thin-walled steel tube is formed by cold drawing. The carbon steel, low alloy steel, alloy steel tube for general structure and mechanical structure; thin fluid pipe for conveying fluid; used in chemical, petroleum, light industry, food, machinery, instruments and other industrial heat-resistant container pipeline and mechanical structure of stainless ...

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Submerged arc welding steel pipe is a strip coil as raw material, often warm extrusion molding, spiral with automatic double wire submerged arc welding process double-sided welded pipe joints. Characteristics of submerged arc welded steel pipe ERW production has the advantages of simple process, high production efficiency, low cost, rapid development. Spiral welded pipe ERW pipe strength than high, with a narrow billet production of large diameter pipe, can also use t...

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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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A pressurized fluid conveying spiral submerged arc welded steel pipe (SY5036-83) is mainly used to transport oil and gas pipeline; pressure fluid conveying spiral seam high frequency welding steel tube (SY5038-83), high frequency welding method for welding, pressure liquid transportation spiral seam high frequency welded pipe. Steel strong bearing capacity, good plasticity, easy processing and welding molding; general low-pressure fluid transport with spiral submerged arc...

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