... design, novel structure, convenient operate Tee: Tee TypeEqual tee, reducing tee,lateral tee, BW/butt weld tee, TH/threaded tee, SW/socket weld tee, seamless teeStandardASME B16.9, ASME ... 42,API 5L GRB, X60, X65, X42,X52,ASTM A403 WP304, A403 WP304L, A403 WP316, A403 WP316L, A403 WP321ASTM A182 F 304, 304L,316, 316L,904LASTM ...