Steel pipe, spiral steel pipe Sea of ??Tranquility, Sea of ??Tranquility Sea of ??Tranquility Spiral Jinghai steel www.naimoguanjian.com www.thgangguan.com 
 www.bengguan168.com spiral steel pipe material: Q235 
 Also according to customer need the optional material. The spiral pipe standard basis for the production and testing of: SY/T5037 standard. Length Length is usually: 12000mm, can also produce a different length of the pipe. 
 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 straight seam welded pipe, spiral steel pipe 
 Spiral Pipe 
 Pump tube 
 Fabric machine 
 pvdf tubes can narrow the billet production of large diameter pipe, the pipe of different diameters can also use the same width of the billet production. 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: 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; low pressure fluid transmission spiral submerged arc welded 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 (department standard, also known as 
 Common fluid pipeline with spiral submerged arc welded pipe), GB/T9711.1-1997 (GB, also known as the Petroleum and natural gas industries - Steel pipe for pipelines - Technical delivery conditions: Pipes of requirement class A (to currently requires strict GB/T9711 .2 
 Pipes of requirement class B)), API-5L (American Petroleum Association, also known as line pipe;