The specifications of the spiral steel pipe produced by the hydraulic press in our factory are complete. Spiral steel pipe use: Spiral steel pipe is mainly used in water engineering, petrochemical industry, chemical industry, electric power industry, agricultural irrigation, and urban construction. It is one of the twenty key products developed in China. For liquid transportation: water supply and drainage. For gas transportation: coal gas, steam, liquefied petroleum gas. For structural use: for piling pipes and bridges; for docks, roads, and building structures.Material: Q235A, Q235B, 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb, 16Mn, 20 #, Q345, L245, L290, X42, X46, X70, X80 spiral seam submerged arc welded steel pipes for pressure fluid transportation For the transportation of oil and natural gas pipelines; Spiral seam high-frequency welded steel pipe for pressure fluid transportation SY5038-83, Spiral seam high-frequency welded steel pipe for pressure fluid transportation welded by high-frequency lap welding. The steel pipe is strong under pressure and has good plasticity, which is convenient for welding and processing. Generally, the spiral seam submerged arc welded steel pipe SY5037-83 for low-pressure fluid transportation is selected for double-sided active submerged arc welding or single-sided welding for water, gas, Submerged arc welded steel pipes for general low-pressure fluid transportation such as air and steam.The current common specifications of spiral steel pipes are generally divided into: SY / T5037-2000 (Ministry standard, also known as spiral seam submerged arc welded steel pipes for general fluid transportation pipelines), GB / T9711.1-1997 (national standard, also known as oil and gas industry transportation Part of the technical conditions for steel pipe delivery di: Grade A steel pipe (GB / T9711.2 Grade B steel pipe has been required severely), API-5L (American Petroleum Institute, also called pipeline steel pipe; PSL1 and PSL2 are divided into two Grade), SY / T5040-92 (spiral submerged arc welded steel pipe for piles). Since the establishment of our company, we have adhered to the principle of integrity and quality first, and have won common praise from the industry!Synergy is humane, and we are willing to work with you to work together to achieve win-win cooperation.
Both internal and external welding are performed by single- or double-wire submerged arc welding using the Lincoln welding machine in the United States, and then stable welding specifications are obtained. Considering that China's rural market has great potential and has not been tapped, there is no doubt that the space for the development of spiral steel pipe occupations is getting wider and wider. The gas supply system and heating consumption trends will also bring increased demand. China now has established a pipe application industry mainly consisting of large-diameter spiral steel pipes, thick-wall spiral steel pipes, and anti-corrosion spiral steel pipes. These three types of information products occupy the spiral The primary supply share of steel pipe occupation. Spiral welded pipe specifications generally have higher strength than straight seam welded pipes. Spiral welded pipe specifications can produce welded pipes with larger pipe diameters from narrower billets. Spiral welded pipe specifications can also produce welded pipes with different pipe diameters from billets of the same width. However, compared with straight seam pipes of the same length, the standard weld length of spiral welded pipes is increased by 30 to 100%, and the production speed of spiral welded pipes is lower. Most of the smaller-diameter welded pipes use straight seam welding, and large-diameter welded pipes mostly use spiral welded pipe specifications.
Spiral steel pipe prices from well-known manufacturers-Spiral steel pipe manufacturers Spiral welded pipe mills use the * roller centripetal forming theory, welding uses the well-known Lincoln welder, Germany's Siemens PLC control system, and the British meta company's laser tracking system active, The whole unit is equipped with a highly active computer touch screen control system and online ultrasonic flaw detector, X-ray industrial TV, 1500 tons of active control hydrostatic pressure testing machine . The whole unit has a high degree of initiative, stable molding and reliable welding quality. First of all, because the faults are parallel to the weld seam, for a spiral pipe, the weld seam has a "sloping fault". In the application process, the principal stress direction of the steel pipe, that is, the equivalent defect length of the axis of the steel pipe is shorter than that of the straight seam pipe. Secondly, because the pipeline steel is a rolled steel plate, the impact toughness has a large anisotropy, and it follows the rolling direction. The CVN value can be twice as high as straight in the rolling direction. Welded steel pipe, also called welded pipe, is a steel pipe made of steel plate or strip steel after welding by curling. The production process of welded steel pipe is simple, the output power is high, there are many types and specifications, and the equipment cost is small, but the strength is generally lower than that of seamless steel pipes.