SSAW Pipe

 13 thousand tons of spiral pipe, welded steel structure of C9 locking sheet pile, the first batch has successfully set sail, hopeful to participate in the construction of wharf infrastructure in Africa. This is not the first time Xinyue has operated a project of more than 10,000 tons. We participated in Malaysia bridge project, Dubai urban ventilation network, Australian offshore platform, Vietnam Haiphong stadium structure, Ireland airport project, Chile coastline construction, India offshore island construction and New Zealand national prison reconstruction.Directly or indirectly with Pakistan oil company, Abadan refinery, Venezuela oil company, Aramco, Kuwait oil company, Nigeria oil company, etc. All projects show development of Xinyue, and these are also basics to win projects. There is an old saying: Who conquers the world has strength;Who conquer the self has harmony. 2.1 meters in diameter, nearly 30 meters in length, the material is EN10219, S460/S355, 13,000 tons. To be ...

　　 Spiral pipe is a very widely used pipe, sometimes it may require welding, but spiral pipe exsit welding defects. 　　Under normal circumstances, weld defects of spiral pipe has porosity, undercut and crack phenomena. 　　Helical tube bubble defects: conducting spiral welded, in the center of the weld bead, there will be the situation of bubble defects, will produce this situation? Main reason is that, in the welding process is hydrogen bubbles form of residue inside the metal. How to solve this failure? Welding process, we need to clear weld the inside of the oil, water and other ingredients, but also need good drying and removing moisture, so that hydrogen does not remain inside the weld . Increasing the welding current in the welding process and the generation of the bubble can be avoided yet. 　　Spiral undercut: v-shaped groove weld edge, and along the weld centerline, said undercut. Usually undercut is inappropriate because of the current, voltage and welding speed, therefore,...

　　Thread pipe and spiral pipe are one of welded steel pipe , but both there are essential differences. 　　The form of thread pipe present in the tube end, the majority of the connection tube is used. Particularly in the pipe connections are optional steel pipe, which can be more secure. Thread pipe is not just used for pipe connections, can also be used for casing and tubing connections. Thread pipe has high thermal conductivity coefficient, internal heat required for the heat than the external high places. Thread pipe have improved the performance and can keep temperature at work, in particular, the internal temperature. Under normal circumstances the internal temperature of the steel tube a temperature is higher than the outside 1 times. 　　Spiral steel pipe external form is rolled steel plate, and in a more visible on the surface of the weld. Spiral pipe has a strong corrosion resistance, is not susceptible to corrosion, the use of relatively long duration. So strong resistance t...

    ERW carbon steel pipe vs spiral pipe:     First, the difference between the production process     ERW carbon steel pipe is the hot rolled coil through the continuous roll forming, the use of high-frequency current skin effect and proximity effects, so that the edge of the coil heat fusion, pressure in the squeeze roller under pressure welding to achieve production. Therefore, erw carbon steel pipe residual stress is small, through the weld heat treatment, sizing, straightening, water pressure and other processes, the residual stress to further release and reduce. Practice has proved that erw carbon steel pipe in the storage and use of residual stress on the steel pipe does not affect. Without any welding wire, the weld in the physical properties and chemical composition with the plate exactly the same. The quality of the erw carbon steel pipe depends on the quality of the sheet.     Spiral steel pipe through the unit spiral rotary wel...