1.Hot Dipped Galvanized Steel Pipe 2. Size:14580*0.12-2*6000mm 3. ... G3302 GB/T-12754-20065. Application of Hot Dipped Galvanized Steel Pipe ConstructionOutside: Workshop, agricultural warehouse, residential precast unit, corrugated roof ... , roller shutter door, rainwater drainage pipe, retailer boothInside: Door, door case, light steel roof structure, folding screen, elevator, stairway ...