1) Sizes (O.D. x T): form 6 x 1mm to 168 x 12mm

2) Standards: DIN2391, GB3639

3) Surface: oiled or black painted to prevent rust

4) Marking: as per customer\'s requirement



Commonly used steel grade:

10, 20, 35, 45, 20CrMo



Inner packing:

Caps on two ends of every pipe



Outer packing:

Hexagonal shape bundles wrapped with strong steel trip or according to customers\' requests