ASTM A53 Gr. B Galvanized Steel Pipe

　　Special-shaped steel pipe refers to all kinds of circular cross section of the steel pipe. Steel pipe according to the profile shape is divided into: such as cross section steel tube and variable cross section steel tube. Variable cross-section or variable cross-section steel pipe refers to the cross section shape along the length direction, both inside and outside diameter and wall thickness change periodic or aperiodic steel pipe. Its mainly include: tapered tube, tapered tube inside and outside ladder pipe, the ladder, deformed pipe, corrugated pipe, spiral pipe, steel tube with heat sink, and with double line of barrel, etc.