A234 WP91 Fittings Pipe fittings ASTM A234 WP91 A234 A234 WP91 Fittings Types. Elbows, Long Radius Elbow, Short Radius Elbow, Bend, Long Radius Bends, Piggable Bends, Tee, Equal Tee, Reducing Tee, Cross, Reducer, Concentric Reducer, Eccentric Reducer, Pipe End Caps. A234 WP91 Fittings Dimensions A ...