Butt-weld concentric pipe reducers Design spec ASME B16.9 Mat LOW TEMPERATURE CARBON STEEL Mat spec, fitting ASTM A420 GRADE WPL6 Manufacturing process SEAMLESS Service SOUR Service requirement NACE MR 01-75 Schedule number S-80 x S-80 Thickness, wall 7.62 x 4.55 mm Size 80 x 25 mm