· How to connect the refrigeration pipes [2016-03-18 HITS：1]
　Cooling pipe using seamless steel tube should be used as welding, in addition to use when connected to the equipment, valves flanged or threaded connection [READ]

· Welding steel tube is one pipe the surface has the steel pipe joint [2016-03-17 HITS：6]
　　Welding steel tube is one pipe the surface has the steel pipe joint,which is use the steel belt or steel plate material through the bending deformation into round ,square ect then welded into shape . 　　Welded steel pipe ... [READ]

· The lifetime of spiral steel pipe has relationship with decarburization [2016-03-17 HITS：7]
The lifetime of spiral steel pipe has relationship with decarburization [READ]

· standards pipes [2016-03-15 HITS：8]
standards pipes. GB/T8163-2008， GB/T8162-2008， GB3087-2008， GB5310-2009， GB6479-2013， GB/T17396-2009，GB/T9711-2001/ API Spec 5L, API 5L PLS1/PLS2, [READ]

· welding pipes [2016-03-15 HITS：4]
Electric Resistance Welded steel pipes material is hot roll steel coil. It has a well-distributed thickness than the seamless pipes. [READ]

· seamless pipe introduce [2016-03-14 HITS：9]
　Steel pipes carbon steel seamless pipes Size Size 1/4” to 24” Outside Diameter 13.7 mm to 609.6 mm [READ]