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 Lincoln welding machine line of automatic two-sided submerged arc welding the standard SY/T5037-2000 of the implementation of the oil and gas industry, SY/5040-92 the, GB/T9711.1-97 production company based on quality, full implementation of quality management. Passed the ISO9002 quality management system certification, and passed the ISO9001-2000 quality management system certification. And is equipped with X-ray, ultrasonic and hydrostatic pressure across the board automatically detect. This product is widely used in the field of water engineering, petrochemical industry, hydroelectric power industry, agriculture, irrigation and urban construction. The transport of liquids: water supply, drainage; gas transportation: gas, steam, liquefied petroleum gas; for structure: for piling pipe, as pillars, piers, roads, building structures tube. 
 Spiral steel pipe material: Q235 according to customer needs-demand material. Standard basis of the spiral pipe: SY/T5037 standard production and testing. Length Length is usually: 12000mm, can also produce the pipes of different lengths. Also known as the spiral tube or spiral body. The spiral's diameter is about 30 nm, inner diameter of about 10 nm, and the adjacent helical pitch of approximately 11 nm. Spiral of one week surrounded by six nucleosomes, H1 histone is located in the inner surface of the spiral cavity plays an important role to maintain the structure of the spiral. 10 nm nucleosome fiber spiral of the formation of a 30 nm thick fiber, and further compressed to six times the length of DNA. Spiral features: welded pipe production process, high efficiency, low cost, rapid development. The strength of the spiral welded pipe is generally higher than the Longitudinal, can narrow the billet production of large diameter pipe, you can also use the same width of the billet production of different diameters of pipe. However, compared with the same length of straight seam pipe, the weld length increased by 30 to 100%, and lower production rate. Therefore, smaller diameter pipe mostly straight seam welded pipe of large diameter are mostly spiral welded. Spiral and its standard: the pressure fluid transmission spiral submerged arc welded steel pipe (SY5036-83) is mainly used for transporting oil, natural gas pipelines; pressure fluid transmission spiral high-frequency welded steel pipe (SY5038-83), high-frequency welded steel pipe welding using high-frequency lap welding method for the pressure fluid transmission spiral seam. Bearing capacity of steel pipe, plastic, for easy welding and processing; generally low pressure fluid Spiral Welded Steel Pipe (SY5037-83), using double-sided automatic submerged arc welding or single-sided welding into the legal system for water, gas, air and steam, low pressure fluid SAW pipe. 

 The commonly used standard spiral is generally divided into: SY/T5037-2000 (Ministry of standard, also known as the common fluid pipeline spiral submerged arc welded steel pipe), GB/T9711.1-1997 (GB, also known as oil and gas industry transportation delivery of the first part of the technical conditions of steel pipe: Pipes of requirement class A (the current demanding GB/T9711.2 Class B steel pipe)), API-5L (American Petroleum Institute, also known as line pipe;