Union Elbow – Tube Butt Weld Union Elbow – Tube Part NoT Tube O.D (in.)t Wall Thickness (in.)LBFWork Press. (psig)FAV-4TBW-SS1/40.116.39.79.510320.0FAV-4TBW-SS3/80.118.09.711.19930.0FAV-4TBW-SS1/20.124.414.214.36780.0FAV-4TBW-SS3/40.133.319.120.65530.0FAV-4TBW-SS10.137.119.127.04480.0