Dear Sirs, We at PSL PIPE & FITTINGS CO. meet or exceed the international requirements with reference to the following standards. A SME/ANSI B16. 5 - 1996 - Pipe Flanges and Flanged Fittings ASME/ANSI B16. 9 - 2001 - Factory-Made Wrought Steel Butt welding Fittings ASME/ANSI B16.10 - 2000 - Face-to-Face and End-to-End Dimensions of Valves ASME/ANSI B16.11 - 2001 - Forged Steel Fitting