China JIS G3444 STK400 Carbon Steel Seamless Pipe Plant Derbo Offers JIS G3444 STK400 Carbon Steel Seamless Pipe, Hot Rolled, Coating, General Structure.
China API 5CT K55 PSL1 OCTG Casing Manufacturer Derbo Provides API 5CT K55 PSL1 OCTG Casing, Hot Rolled, 508MM X 11.13MM, Painting, Gas Transportation.