Flange Types: Spacer Ring Flange Material standard: ASTM A105 A350 LF1, LF2 CL1/CL2, LF3 CL1/..

Materials: ASTM A516 Gr.60, A516 Gr.65, A516 Gr. 70 (Carbon Steel, CS) Standards: ANSI B16.48, API5..