Deskripsyon kout:

Estanda: API 5L PSL1, ASTM A53, ASTM A252, SY/T5037, SY/T5040, DIN 30670 Materyèl: ASTM A252 GR.1—3，SS400, ST37, ST52, Q235, Q345, API GR.A, GR.B. Spesifikasyon: OD: 219.1mm-2320mm Epesè mi: 5mm-24mm Tretman sifas: galvanize, 3-KOUC PE, FBE, lak, vèni