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...

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...

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...

Large diameter welded steel pipe is generally used GB/T3091-2001 and GB/T9711.1-1997 standards. Straight pipes made of Q235A, Q235B, 16Mn, 20#, Q345, L245, L290, X42, X46, X70, X80, 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb. Large diameter welded steel pipe is mainly used for conveying water, gas, air, oil and heating hot water or steam, such as generally low pressure fluid and other use pipe. Large diameter welded steel pipe surface allows the existence doe...

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...

Spiral 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. 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. B...

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 ...

Cast iron pipe for cast iron pipe. Cast iron pipe for water supply, drainage and gas transmission pipeline, it includes the cast iron pipe and pipe fittings. Labor intensity is small. According to different casting methods, divided into continuous cast iron pipe and the centrifugal cast iron pipe, wherein the centrifugal cast iron pipe is divided into two types of sand and metal. For pipe and cast iron pipe ductile cast iron by different materials. According to the differ...

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...

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...

Seamless rectangular tube usage is very high. However, the general construction side before the construction of the pipe, pipe, rubber ring and so do a visual inspection, found to have problems to give up. 1. Clean seamless pipe mouth: the mouth of all the debris removed scrub clean. 2. Clean the apron, the apron: the adhesive ring on the adhesive wipe clean, the apron bent "plum-shaped" or 8-shaped socket into the slot, and press the rubber ring along the entire hand...

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 in pursuit of high efficiency, the amount of pressure is too large, produce handle, a rolling produce folding, folding products after bending cracks, the strength of steel big drop. Inferior rectangular tube appearance often pitted phenomenon. Ma is due to a defect of g...