1. Multi-lead rifled seamless boiler tube
2 Standard specification&steel grade: ASTM A210 Gr. A1/C, ASTM A209 T1, ASTM A213 T2, T5, T9, T11, T12, T22, T23, T91, T92, ASTM A335 P1, P2, P5, P9, P11, P12, P22, P23, P91, or other equivalent standard&material.
2. OD: 28.6mm...
Products: water tube boiler,
steel seamless tube