Huizhou straight seam welded steel pipe coil - Huizhou steel casing custom processing factory 18,033,242,424 18,823,102,210 Liu Bao six spiral steel raw materials is a strip coil is often warm extrusion molding, automatic two-sided double wire spiral submerged arc welding process pipe joints. Huizhou straight seam weld coil processing welded steel pipe - Huizhou factory custom processing steel casing pipe will spiral steel pipe into the unit, the multi-channel roll rolling, gradually rolled strip, forming a circular tube with an opening gap Adjust squeeze roll reduction, so that the weld gap control in 1 ~ 3mm, and weld two 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 fluid delivery spiral 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, docks, bridges with steel spiral pipe pile foundation is mainly used in water engineering, petrochemical industry, chemical industry, power industry, agricultural irrigation, urban construction, is one of the 20 key products developed for the transport of liquids: water supply, drainage. for gas transportation: gas, steam, liquefied petroleum gas for structures: as piling pipe, for bridges; piers, roads, buildings and other structures with 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, Huizhou, Zhanjiang, Maoming, Yangjiang, Meizhou, Shanwei, Heyuan, Qingyuan, Dongguan, Zhongshan, Zhuhai, Shantou, Jieyang, Yunfu, Shaoguan Nanning, Guangxi 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 price spiral pipe manufacturers, large diameter steel pipe spiral steel pipe, spiral welded steel pipe, bridge jacking, steel casing, piling pipe, steel pipe piles, water pipes, billboards column tube products play sand, corrosion, galvanized, bending, machining, etc. mainly for steel piling pipe pile steel 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 coil diameter 219-5000mm Thickness 6-40mm Billboard low carbon spiral pipe column sided spiral submerged arc welding of high frequency spiral hydropower penstock pipe fluid pipes dredging bridge jacking thick spiral Q235B Q345B spiral spiral spiral small caliber antiaircraft spiral steel piling large diameter spiral spiral spiral pipe 3PE GB spiral coil pipe welded steel pipe welded pipe tee spiral steel pipe pile drilling reel irrigation (guan) Note pile steel casing water pile steel casing bored piles steel casing Piles of steel casing steel casing pile bridge pier piling piling steel casing steel casing cities pile steel casing bored piles and bridge steel casing pipe bridge pillar drilling offshore steel casing pile Bored steel guard tubular steel pier piling pipe grouting pile foundation piling steel piling pipe piles supporting the bridge spiral welded pipe Chinese name Huizhou straight seam welded steel pipe coil - Huizhou steel casing custom processing factory