1) Standards: ASTM A513, SCH 40 and BS 1387
2) Outer diameter: 10 - 114.3mm
3) Wall thickness: 0.5 - 3.0mm
4) pre-galvanized steel pipe,first we make it to galvanized steel strip,then we make pipe from galvanized steel strip

5)outside welded line have znic,but inside welded line no zinc
6) All possible shapes are available:

round

square

rectangle

oval

7) Widely used in furniture,fencing, scaffolding, petroleum, water system and construction areas
8)Packing: in bundles,with steel packing strip,first with the PVC paper to pretect the pipe from the water,outside is knitted strap