SCI Malleable Iron Pipe Fittings conform to ASME B16.3 dimensions and pressure ratings. Unions conform to ASME B16.39, while bushings and plugs conform to ASM B16.14. All SCI Malleable Iron Fittings are tested for through wall porosity using an air under water process. Malleable Iron Class 150 and Class 300 Pipe Fittings are UL Listed and FM Approved.