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                      American Standard ASTM seamless steel pipe with distinguished American standard seamless steel pipe ASTM similarities and differences
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                      Distinguished American Standard ASTM seamless steel pipe seamless steel pipe and the similarities and differences
                      There are several common market welded pipe, welded pipe, spiral welded pipe and seamless pipe, but Longitudinal and spiral welded pipe are very good identification, seamless pipe and seamless steel pipes difference can be from the following aspects view:
                      1, the pipe is cut to length in general, and are generally 6 m, 9 m or 12 m. Seamless pipe length is very small, because the factory length increases very much.
                      2, you can head from the tube cross-section view, if there is rust, then earned his dry, look closely will find the welding area.
                      3, if the pickling, the effect is most obvious.
                      Detailed implementation of the standard ASTM
                       
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