Wuzhishan spiral spot sales

 18,033,242,424 18,823,102,210 Liu Bao Wuzhishan six spiral steel spiral spot sales of raw materials is a strip coil is often warm extrusion molding, automatic two-sided double-wire submerged arc welding process of spiral seam welded steel pipe. Spiral Weld Pipe processing unit will strip into the pipe, the multi-channel roll rolling, gradually rolled steel, formed with an opening gap of circular tube, squeeze rollers adjust reduction, the weld gap control In 1 ~ 3mm, and weld the ends flush. 1. If the gap is too large, resulting in reduction of the proximity effect, lack of eddy heat weld together indirectly caused by poor grain unfused or cracking. 2. If the gap is too small, causing the proximity effect increases, excessive heat welding, weld cause burning; or weld extruded to form a pit after rolling, affecting the quality of the weld surface. After the two edges of the tube is heated to soldering temperature, in the squeeze roll pressing, to form a common mutual penetration of the metal grains, crystals, and ultimately form a strong weld. Spiral steel pipe if the pressing force is too small, the formation of crystals on the small number of joint, the weld metal strength is reduced, the force generated after cracking; if the pressing force is too large, will make a molten state is extruded weld metal, not only reduces the weld strength, and will generate a lot of internal and external burrs, and even cause defects such as welding seam ride. Pressure fluid transport with spiral submerged arc welded pipe SY5036-2000, mainly used to transport oil, natural gas pipelines; pressure fluid transport spiral seam high frequency welded steel pipe SY5038-2000, high frequency welding lap welding method for pressurized fluid transport spiral seam high frequency welded steel pipe. Strong pressure steel, plastic, and easy welding and machining molding; general low pressure fluid, with spiral submerged arc welded pipe SY5037-2000, using double-sided automatic submerged arc welding or welding into the legal system for water, gas , air and steam low pressure liquid delivery SAW pipe. Commonly used spiral steel pipe standards are generally divided into: SY / T5037-2008 (Ministry of standard, also known as general fluid pipes with spiral submerged arc welded pipe), GB / T9711.1-2008 (GB, also known as the oil and gas industries - Steel pipe Technical delivery conditions Part: A grade steel (demanding a GB / T9711.2 B grade steel)), API-5L (American Petroleum Institute, also known as line pipe; which is divided into two levels PSL1 and PSL2), SY / T5040-2008 (pile with spiral welded steel pipe). SY / T5037-2008 Oil Ministry is setting standards are generally referred to as the Ministry of standard GB / T9711.1-2008 national spiral, oil and natural gas industries - Steel pipe, A-level low pressure liquid delivery spiral seam high frequency welded steel pipe (SY5039-2000 ) is a hot-rolled steel strip coils for the tube, often warm spiral shape, using high-frequency welding lap welding method for low pressure liquid delivery spiral seam high frequency welded steel pipe. Pile with spiral welded steel pipe (SY5040-2000) is a hot-rolled steel strip coils for the tube, often warm spiral shape, using double-sided submerged arc welding or high frequency welded for civil engineering structures, piers, bridges other basic spiral steel pipe pile with mainly used in water engineering, petrochemical industry, chemical industry, power industry, agricultural irrigation, urban construction, is one of the twenty key product development. For the transport of liquids: water supply, drainage. For gas transportation: gas, steam, liquefied petroleum gas. For structural purposes: as piling pipe, for bridges; piers, roads, buildings and other structures tube. Spiral steel pipe, spiral pipe, steel plants, bridges top tube, steel casing, piling pipe, steel pipe piles, water pipes, billboards column tube, water, piling steel casing pile casing Chaozhou, Guangdong, Guangzhou, Shenzhen, Foshan, Jiangmen, Zhaoqing, Maoming, Zhanjiang Yangjiang Qingyuan, Meizhou, Shanwei, Heyuan, Huizhou, Dongguan, Zhongshan, Zhuhai, Shantou, Jieyang, Yunfu, Shaoguan Nanning, Beihai, Qinzhou Fangchenggang Guigang Yulin Chongzuo guest Baise, Hechi Hezhou Liuzhou, Guilin, Haikou, Sanya, Hainan Wuzhou Ji'an, Jiangxi Ganzhou, Fuzhou, Shangrao, Yichun spiral galvanized spiral, spiral steel pipe plant, spiral pipe prices, spiral pipe manufacturers, large diameter steel pipe. Spiral steel pipe, spiral pipe, welded steel pipe, bridge jacking, steel casing, piling pipe, steel pipe piles, water pipes, billboard products provide a sand column pipe, corrosion, galvanized, bending, machining and so on. Mainly used for steel pipe pile steel piling pipe coil steel casing pipe casing retaining barrel spiral welded steel pipes of large diameter steel water pipe sewage drainage pipe straight seam steel spiral welded steel pipe straight seam welded steel pipe corrosion spiral coil galvanized spiral The thickness of 6-40mm diameter 219-5000mm billboard column low carbon spiral pipe submerged two-sided spiral high-frequency welding spiral hydropower penstock pipe fluid pipes dredging bridge jacking thick spiral coil Q345B Q235B spiral small caliber antiaircraft spiral spiral spiral pipe piling GB large diameter spiral spiral spiral steel coil tube T 3PE steel welded pipe spiral steel pipe welded steel pipe pile drilling reel irrigation (guan) Note pile steel casing pile steel water Casing drilling steel casing pile pile pile of steel casing steel casing bridge piling steel casing city pier piling steel casing pile steel casing bored piles and bridge pillar steel casing pipe steel bridge bored pile retaining Bored barrel offshore pier piling steel casing pipe steel pipe pile grouting steel piling pipe pile foundation piling bridge support Chinese name spiral welded pipe spiral spot sales Wuzhishan