The quality of roller directly effect welded pipe quality.
焊管轧辊质量直接影响着焊管产品的质量。
Body symmetry, in particular welded body structure, well under the stress from the pipe.
阀体对称，尤其是焊接阀体结构，能很好地承受来自管道的应力。
It is briefly analyzed the production and demand situation of China welded pipe market.
简要分析了国内焊管市场的生产和需求情况。
The characteristic and its production process flow of high strength welded pipe are introduced.
介绍了强力焊管的特点及其生产工艺流程。
The pass design method of high strength welded pipe is also explained with examples.
举例说明了强力焊管孔型设计方法。
A deformation way from round welded pipe to square one is introduced.
介绍了一种由圆形焊管变方形焊管的变形方式。
Some parameters, such as perimeter, diameter, is very important to quality of spiral welded pipe.
螺旋管的周长、直径等参数对于螺旋管的质量非常重要。
Some parameters, such as perimeter, diameter, is very important to quality of spiral welded pipe.
螺旋管的周长、直径等参数对于螺旋管的质量非常重要。
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