产品中心 Products
                      钢套钢保温钢管
                      钢套钢保温固定支架
                      钢套钢保温弯头
                      钢套钢保温疏水节
                      钢套钢保温三通
                      钢套钢保温补偿器
                      聚脲防腐保温
                      直缝、螺旋钢管
                      管件系列
                      无缝钢管
                      防腐钢管系列
                      美标无缝钢管ASTM  A106/A53 GR.…
                      出口合金钢管
                      联系方式 Contacts
                      沧州翱德管道制造有限公司
                      地 址:河北盐山县城南开发区
                      电 话:0317-6189002
                      传 真:0317-6189003
                      手 机:15130768516微信同号
                      联系人:刘威 (总经理)
                      邮 箱:853653150@qq.com
                      Straight seam, spiral steel pipe
                       
                      The thermal expansion of straight seam steel pipe
                      Click: ]

                      The thermal expansion of straight seam steel pipe

                      Straight seam steel pipe according to the production process can be divided into high-frequency straight seam submerged arc welded straight seam steel pipes and steel pipes. Submerged arc welding straight seam steel pipe according to their different molding method is divided into UOE, RBE, JCOE steel pipe. Here are the most common high-frequency straight seam submerged arc welded straight seam steel pipes and pipe forming process.
                      Straight seam steel pipe is parallel to the longitudinal weld steel pipe and steel pipe. Usually divided into metric welded steel pipe, welded thin-walled tube, transformer cooling pipes and so on. Longitudinal production process is simple, high efficiency, low cost, rapid development. Spiral Welded Longitudinal generally higher than, can narrow the billet production of large diameter pipe, you can also use the same width of the billet production of different pipe diameters. But with the same length of straight pipe joints than weld length of 30 to 100%, and lower production rate.
                      Straight seam steel pipes are mainly used in water engineering, petrochemical industry, chemical industry, power industry, agricultural irrigation, urban construction. For the transport of liquids: water supply and drainage. For gas transportation: gas, steam, liquefied petroleum gas. For structural purposes: as piling pipe for bridges; docks, roads, buildings and other structures tube.
                      Submerged arc welding straight seam steel pipe production process
                      1 plate probe: used to manufacture large diameter submerged arc welding straight seam steel pipe into the production line, the first full-board ultrasonic testing;
                      (2) Milling: Milling Machine through the edge of the plate two-sided milling, so as to achieve the requirements of the plate width, plate edge parallelism and groove shape; 3. Preflex side: the use of pre-bending machine for plate edge pre-bending , the plate edges have to meet the requirements of curvature;
                      (4) forming: JCO forming machine in the pre-bent first half of the steel sheet after punching after several steps, pressed into a "J" shape, and then the other half of the same steel plate bent, pressed into a "C" shaped, and finally form an opening The "O" ring
                      5 presoldering: make after forming straight seam welded steel pipe commissure and the use of gas welding (MAG) for continuous welding;
                      6 internal welding: the use of tandem multi-wire submerged arc welding (up to four wire) in the straight seam welded steel pipe inside;
                      7 outside welding: A multi-wire submerged arc welding in tandem LSAW steel pipe welding outside;
                      8 Ultrasonic Inspection Ⅰ: right straight seam welded steel pipe weld and weld on both sides inside and outside base material 100% inspection;
                      9. X-ray examination Ⅰ: 100% of the external weld of the X-ray inspection television industry, the use of image processing system to ensure the detection sensitivity; 10. Enlarged diameter: length of the submerged arc welding straight seam pipe diameter is expanded to improved dimensional accuracy of the steel pipe, steel pipe and to improve the distribution of the stress; 11. pressure test: on the hydraulic test machine steel pipe after expanding to test each tube to ensure the required test pressure up to standard, the machine has an automatic recording and storage capabilities;
                      12 chamfer: The inspection of steel pipes for pipe end after processing, to meet the requirements of the pipe end beveling size;
                      13 Ultrasonic Inspection Ⅱ: ultrasonic inspection by the root again to check in straight seam welded steel pipe flaring, hydraulic defects that may arise after; 14. X-ray examination Ⅱ: for expanded diameter steel pipe after hydrostatic testing and X-ray industrial television inspection and tube end welds film;
                      15 Magnetic particle inspection of tube ends: This check is performed to detect defects in the pipe ends;
                      16 anti-corrosion and coating: after passing the pipe according to user requirements for corrosion and coatings.

                       
                      码亚洲中文无码AV在线