Steel frame: ASTM A234 grade WPB, in compliance with ANSI B16.28. Steel reducer : according to SCH 40. Flange: ASTM A105, in compliance with ANSI B16.5Class 150lbs: JIS 10K or DIN is also available on request. Lining: Pure PTFE I FEP I PFA in compliance with ASTM D4894, under 4” PFA lined con. reducer is on request.