Seamless steel pipes are manufactured by piercing solid round steel billets, resulting in tubes with no welded seams on their surfaces. Based on production processes, they are categorized into hot-rolled seamless steel pipes and cold-rolled seamless steel
| Outer Diameter (in) | Material | Specification Level | Corrosion Protection | Length |
| 3/4"–36" | A, B, X42, X46, X52, X56, X60, X65, X70, X80, X100 | PSL1, PSL2 | FBE, 3PP, 3PE | SRL, DRL |
Seamless steel pipes are manufactured by piercing solid round steel billets, resulting in tubes with no welded seams on their surfaces. Based on production processes, they are categorized into hot-rolled seamless steel pipes and cold-rolled seamless steel pipes. These pipes are primarily used as geological drilling pipes for petroleum exploration, for transporting crude oil and natural gas, as cracking pipes in petrochemical plants, boiler tubes, bearing tubes, and high-precision structural steel pipes for automotive and aerospace applications.
