Φ51(friction welding) 1250 K49/52*3 Φ60 1025 K52*3 1025 Z48*10 1250 K52*3 2000 Φ60(friction welding) 1250 Z42*10 Φ60 1500 Z48*10 Φ76(wall thickness=6mm) 1000 API 2 3/8"REG 15000 2000 3000 Φ76(wall thickness=8mm) 2000 Φ76(wa...