Severe Service Technology, Inc. SST Severe Service Metal Seated Ball Valves • • • Incorporated in 1997 Over 15,000 valves shipped Total Turnkey Operations • Corporate and Design Offices: Houston, TX • Manufacturing, Assembly & Test: Monterrey, Mexico • Industries: • • • • Power Generation Process Mining Paper All Designs via SOLIDWORKS Simulation FEA • Deflection Analysis • Stress Analysis • Thermal Analysis • Metal Seated Valves with Special Coatings on Sealing Surfaces • • Zero Leakage to API, MSS-SP-61, and ISO Standards and Procedures High Pressure (500+ psi /35+ bar) • High Temperature (up to 1500F /815 C) • Erosive or Corrosive Media (i.e., bitumen, copper, iron ore, gold, silver, and salt water) • Sizes: 1/2 to 36” • ASME Class: 150 to 2500 • End Connections: RF Flanged, RTJ, Greylock, • • • • • Buttweld and Socketweld Bore: Full and Reduced Side and Top Entry Trim Materials: Metallic and Ceramic Sealing: Symmetrical (Uni and Bi-directional) Actuation: Lever, Gear, Electric, Pneumatic and Hydraulic Two or three piece side-entry floating ball valve design with: • Live-load Stem Packing Gland • Scraper Seats • Downstream Seat Retainer • “Flush-Out” Body cavity • ISO Mounting Pad • Optional “Portable Flushing System”. Also available in Top-Entry floating ball design with “caged trim” • Provides installation of internals (ball, seats, and springs) while valve remains in pipeline. • In certain conditions this design greatly reduces downtime and cost versus removing existing valve. Item/Part Materials Body / End Adapter Carbon Steel: A105 Stainless Steel: Type 304 & 316 Seat Stainless Steel: 17-4PH (H900) Inconel 718 Ball Stainless Steel: 17-4PH (H900) Inconel 718 Spring Stainless Steel: 17-4PH (H900) Stem Stainless Steel: 17-4PH (H900) Packing Grafoil Coatings HVOF (Tungsten Carbide) and Spray & Fuse Consult Factory for other materials Live-Loaded Packing Gland End Adapter Spring Seat Stem Body Spring Ball Spiral Wound Gasket Seat Spring Seat • Design can be used for both Uni- and BiDirectional applications • Reduce requirement for spare valves Spring Seat High Velocity Oxygen Fueled (HVOF) process; using oxygen, hydrogen and Tungsten Carbide powder at MACH 5 to 53-57 Rc harness Spray and Fused: Colmonoy (Nickel based) provides very high hardness (50-53 HRC) and extremely good wear and abrasion resistance Valve Open Valve Closed Upon initial opening some material will enter body cavity. Upon valve re-opening, material will “flush-out” downstream of Ball in preferred flow direction Slurry O-Ring eliminates material from getting behind Seat. Spring E-Ring eliminates material from getting behind Seat Slurry Slurry Spring is located above the Seat (not behind Seat) and out of the flow path. Material: Inconel 718 Slurry Flow Knife edge design assists in removal of particulate matter from Body cavity when valve is cycled Retention ring prevents bottom of Stem from making direct contact with Ball Slot, thereby eliminating possibility of damage during actuator installation • API 598: “Valve Inspection and Testing” API 608: “Metal Ball Valves – Flanged, Threaded and Welding End” ISO 5208: “Pressure Testing of Metallic Valves” MSS-SP-61 “Testing” ASME B31.3 “Process Piping” ASME B16.34 “Valves – Flanged, Threaded and Welding End” • Other local requirements • • • • • • • • Tested to API 598 and MSS-SP-61 Body Hydro at 1.5 times MCWP Seat Tested in preferred direction at 1.1 times MCWP • SST will respond within 48 hours • “Service Plan” • Troubleshooting • English and Spanish speaking Field Technicians • • • • • • • • Dofasco Steel Rio Tinto/Quebec Iron and Titanium Sudbury Mining Lakefield Research & Dev. Kilborn Engineering VALE/Inco SNC Lavalin CAP Mineria/Hierro Atacama Autoclaves: SST provides severe service valves for leaching processes (i.e., HPAL) where both high pressure and temperature are present. Valves are also designed for erosive and corrosive applications such as autoclave discharge, vent, isolation, and feed. Roasters: A dry process involving gas-solid reaction at very high temperatures to purify the metal components. Severe service valves are used for isolation and drain. Tailings: A waste slurry product of fine minerals and water which remain after extracted from unusable ore produced by the milling operation. Tailings: A waste slurry product of fine minerals and water which remain after extracted from unusable ore produced by the milling operation. Floatation Cells / Column Thickeners: A method to separate minerals depending on their ability to attach to air bubbles and carry them to the surface. High Pressure Leaching: Where cyanide is added to a precious metal (i.e. gold) and leaching the mineral into solution. Oil Sands: Severe service valves are used in froth treatment, slurry production processes and steam injection in Steam Assisted Gravity Drain (SAGD) systems. Operating and Standby Pump Stations: Severe service ball valves are used to prevent slurry leaking (zero leakage and full differential pressure) back to an idle pump. Valves can be used for both suction and discharge sides for pump isolation. Choke Stations: Where pressure built up must be reduced or eliminated to maintain safe pipeline operation and provide backpressure to provide constant flow. Severe service ball valves are used to divert flow to the Choke Station. When closed, the ball valves must provide zero leakage at full differential pressure. Isolation Stations: Valves are required to operate in the event of major rupture to the pipeline. Placed at certain intervals, ball valves can isolate sections of the pipeline. It is common to have two valves in series (“Cut and Seal”) where one is the flowing valve (Cut) and one is the isolation valve (Seal). SST’s full-ported valves are also designed for pig launching and receiving stations. Instrument Isolation: Control and measurement systems are located the length of the pipeline. These small severe service valves are used to isolate instruments for repair, calibration or replacement while the pipeline is in normal operation. High-Pressure Dewatering: Process where high-pressure water is pumped to the surface from underground mining applications. ASME Class 150 - 2500 Full Bore Sizes 2 -36" Floating Ball Scraper Seats Body/Adapter Structure (pieces) Ball & Seat Material (Standard) Ball & Seat Coating (Standard) Ball & Seat Coating (Optional) Coating Process Body / End Adapter Material Live-Loaded Stem Packing Gland Flow Design Separate Downstream Seat Mate-lapping of Ball and Seats SST Yes Yes Yes Yes Yes 2&3 17-4 PH H900 Tungsten Carbide CC, non-Nickel HVOF Forging Yes Symmetical Yes Full 360 degree Mogas Yes Yes Yes Yes Yes 2&3 410 SS Chromium Carbide TC, non-Nickel HVOF Forging Optional only Bi-directional Yes Seat Face (wide) Above Seat (out of flow In Flow Path path) O-ring to eliminate material flowing Yes, on both Upstream and behind Seat Downstream Seats On Downstream Seat only E-Ring to eliminate material flowing Yes (2) No behind Seat Flush-Out Body Cavity Yes No Spring location VTI Yes Yes Yes Yes Yes 2 Varies RAM 31 C.C. TC, non-Nickel RAM 31 (HVOF) Forging/Casting Yes Uni & Bi-directional No (intregral with Body) Seat Face (narrow) In Flow Path No No No Notes All the Same Similar Major Difference Questions or Comments?