Disgrifiad Byr:

Safon: API 5L PSL1, ASTM A53, ASTM A252, SY/T5037, SY/T5040, DIN 30670 Deunydd: ASTM A252 GR.1-3, SS400, ST37, ST52, Q235, Q345, API GR.A, GR.B Manyleb: OD: 219.1mm-2320mm Trwch wal: 5mm-24mm Triniaeth arwyneb: Galfanedig, Addysg Gorfforol 3-HAEN, FBE, lacr, farneisio