Cold expanded of large diameter straight welded pipe is a use of hydraulic or...
Such as spiral steel pipe weld gap is too large, the effect of cuts constituting ...
Welding means for welding materials under defined conditions for the construction of a member a...
Innovation is an action to keeping up with the forefront of the market. Many companies in order...
Usage of spiral steel pipe is relatively high, the application is very wide, it should be how to...
Straight seam steel pipe can be divided into general steel pipe, galvanized pipe, oxygen blowing pip...
Spiral welding refers strip or plate bending round, square and other shapes and then welded...
The energy market background, especially the construction of long distance natural gas pipeline to p...
API early in 1926 released by the American Petroleum Institute (API) API-5L sta...
Lamination defect control measures of sawh steel pipe is following below: 1, ...
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