spiral-welded pipe

The welding apparatus is flexible for adjustment and has good stability, and can be used for single and double wire internal welding, especially satisfied with the requirements of internal welding techniques of small diameter spiral pipe production.

该该新型螺旋焊管内焊装置调节灵活，稳定性好，可应用于内焊单丝或双丝焊接，特别适合于小口径螺旋焊管生产的内焊工艺要求。

The spiral protective sheath for the rubber tube with good elasticity is more in favor of being installed outside an oil pipe, and has longer service life.

月牙结构，相对传统的特别加厚和直板技术，也更加富有弹性。弹性好的胶管螺旋保护套更有利于安装在油管外面，且寿命更长。

A symposium for appraising the outside spiral pipes and their production process held at Tianjing seamless steel pipe factory

外螺纹管及生产工艺鉴定会在天津市无缝钢管厂召开

Steel barrel was shaped by spiral weld pipe mill.

薄钢筒为螺旋机自动卷焊成型；

The defects will be found in the seam side with ultrasonic inspection but hardly found with X ray inspection as the small diameter spiral pipe production with the split strip steel.

采用纵剪带钢生产小口径螺旋焊管时，超声波检验经常在焊缝的一侧发现缺陷波，而X射线拍片检验却很难发现。

Mechanism Analysis on Bauschinger Effect during the Pipe-making of Spiral-welded Pipe

螺旋埋弧焊钢管卷制中包申格效应的机理分析