MTDTAPSTOP Pressure Control Fittings are designed, tested and manufactured with a 0.40 design factor to meet or exceed the code area replacement requirements for the pressure containment in ASME/ANSI--B31.8(Gas Pipelines). The MTD fittings are certified for use in Class 1, 2, 3 & 4 locations at the maximum aIIowable operating pressures of 285 PSI for ANSI Class 150 series fittings and 740 PSI for ANSI Calss 300 series fittings. MTD fittings are desinged to structurally carry the extra loads imposed during the hot tapping and line stopping operations. MTD fitting design also meets ASME.ANSI B31.4(Liquid Pipelines), B31.3(Chemical Plants and Refineries), B31.3(Power Plants), DOT 192(Federal Requlation for Gas Pipelines, DOT 195(Federal Regulation for Liquid Pipelines) and most Inernational Codes. All MTD Pressure Contrl fittings are marked according to MSS SP 25. MTD employs the ASME Section VII & IX (and API1104) Welding Procedure System. MTD also employs a Quality Assurance Policy, Quality Control Procedures, In Process Inspection and Documentation. MTD Pressure Control fittings are designed for use with spectific types of Hot Tapping and Line Stopping Equipment.