Spiral pipe is being widely used because of its unique advantages. Generally, the spiral pipe is very good bending properties, as in the production process, to be bent at least 180 degrees, and the spiral surface is also not produce cracks. Not only it is better bending performance, reverse bending performance is also good. Reverse bending test apex diameter bending test should be more than add a bar diameter. This step experiment: first forward bend 45 degrees, after a reverse bend 23 degrees, 23 degrees after the reverse bending. Moreover, after the reverse bending test, spiral surface still did not crack. 

Usually the use of spiral into the surface cracks are some scarring or folded traces. Although the spiral surface can be allowed to have bumps, but can not exceed the height of the cross ribs and other defects on the coil surface depth and height are not greater than the site where the size of the allowable deviation.

Hebei Abter is a leading supplier and exporter of  steel pipes in China. Abter is an exporting company who is jointly invested by 6 top steel factories ,with  the purpose to providing multiple products and professional services to the clients.we establish a long -term business relationship with many Group company.Our company is a large scale enterprise which manufacture and supply LSAW, fluid pipe, SSAW,ERW, DIN Tube, , alloy pipe, tubing, casing, line pipe, etc. With advanced technological equipment, tremendous technical strength and reliable product quality, our  steel pipes have been exported to the Middle East, Southeast Asia, Africa, South America, North America, Europe, Australia and many other countries and regions.