Swivel-Ring Flanges can be designed for any size and pressure rating to meet applicable dimensions and gasket types of any recognized flange specification, such as ASME B16.5, API 6A or MSS SP-44. Non standard Swivel-Ring Flanges can also be custom-designed for certain applications; for example, applications involving large pipelines may incorporate features such as hub face profiles to aid axial alignment and Teflon rings between the SRF ring and hub to reduce rotational friction Ordering Information£º Please provide the following information on any purchase order or request for quotation: Nominal pipe size Pipe wall thickness or bore Pipe grade Design rating Specification of mating flange. Packing by plywood.