1 galvanized pipe, is abasic materials for industries or construction 1 galvanized pipe hollow structural section,1 hollow pipe section1.ASTM A53,ASTM A500, ASTM A513 ... ,gas metallurgy,papermaking,chemical,medical equipment,aviation,boilerheat,exchanger,shipbuiling,construction,etcAddition:Special design available according to requirmentAnti-corrosion and high ...