... O.D:3/8",1/2",3/4",1",1 1/4",1 1/2",2",2 1/2",3",3 1/2",4 ... Usage 1. Low and middle pressure fluid transportation pipeline 2. Casing Tube 3. Boiler Pipe 4. Petroleunm and natural ... industry Package 1. Inner package -- plain plastic bags 2. outer package -- several tubes are bundled in one ... 1) Arts and crafts: cold-drawn or cold-rolled;2) Surface finish: pickling, annealing, manual polish and mechanical ...