ASME B31.3 Process Piping - PSIG Process Piping Course - 05 Valve Selection.pdf · ASME B31.3...
Transcript of ASME B31.3 Process Piping - PSIG Process Piping Course - 05 Valve Selection.pdf · ASME B31.3...
ASME B31.3 Process Piping Course 5. Valve Selection
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ASME B31.3 Process Piping
Charles Becht IV, PhD, PE Don Frikken, PE
Instructors
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1. Establish applicable system standard(s)2. Establish design conditions3. Make overall piping material decisions
Pressure ClassReliabilityMaterials of construction
4. Fine tune piping material decisionsMaterialsDetermine wall thicknessesValves
5. Establish preliminary piping system layout & support configuration
6. Perform flexibility analysis7. Finalize layout and bill of materials8. Fabricate and install9. Examine and test
Piping Development Process
ASME B31.3 Process Piping Course 5. Valve Selection
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5. Valve SelectionCode RequirementsSelection by Valve Type
GateGlobeCheckButterflyBallPlug
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The Material in This Section is Addressed by B31.3 in:
Chapter IV - Standards for Piping Components
ASME B31.3 Process Piping Course 5. Valve Selection
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Code RequirementsListed Valves
Can be used within their pressure-temperature ratings and any additional limitations described in the CodeExcept that bolted bonnets secured by fewer than 4 bolts or a U-bolt may only be used in Category D Fluid Service.
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Code RequirementsUnlisted Valves can be used within Code limitations if they:
have dimensions that “conform to those of comparable listed components insofar as practicable”“provide strength and performance equivalent to standard components”, andsatisfy one of the following:• pressure-temperature ratings established by the method
described in Annex F of ASME B16.34, or• are qualified for pressure design as required by para.
304.7.2.
ASME B31.3 Process Piping Course 5. Valve Selection
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Selection by Valve TypeGateGlobeCheckButterflyBallPlug
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Gate ValveFrom
API 603
ASME B31.3 Process Piping Course 5. Valve Selection
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Gate Valve
Bonnets
FromBonneyStockhamMilwaukee
Bolted
Welded
Screwed
Union
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Gate Valve
Bonnets
Pressure Seal Body to Bonnet Joint
ASME B31.3 Process Piping Course 5. Valve Selection
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Gate ValveStems
FromStockham
Outside Screwand Yoke (OS&Y)
Inside Screw Non-rising Stem
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Gate Valve AttributesOn-off applications (Not considered suitable for throttling)Works as well with flow from either directionSuitable for use in wide range of conditionsCan be made fire resistant and blow-out resistantAvailable in any sizeBlocked-in volume when the valve is closedAlmost always leaks through the seat
ASME B31.3 Process Piping Course 5. Valve Selection
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Globe Valve
FromVogt
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Globe Valve
Straight-pattern Globe with Pressure-seal Bonnet (Ramondi)
Angle Globe(Vogt)
Y-Pattern Globe(Vogt)
ASME B31.3 Process Piping Course 5. Valve Selection
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Needle Instrument
ValveMSS-SP-105
From Vogt
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Globe Valve AttributesSuitable for on-off applications and throttlingWorks best with flow from one directionSuitable for use in wide range of conditionsCan be made fire resistant and blow-out resistantAvailable in sizes up to about NPS 14No blocked-in volume when the valve is closedAlmost always leaks through the seat, but less than a gate valve
ASME B31.3 Process Piping Course 5. Valve Selection
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Check ValveSwing(Ramondi)
Lift(Vogt)
Tilting Disk(ORBINOX)
CenterlineGuided
Disk(Durabla)
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Dual-Plate Wafer Check Valves
Lug Body Wafer (API 594)
Wafer & Lug Bodies (Mueller)
ASME B31.3 Process Piping Course 5. Valve Selection
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Check Valve AttributesWorks only with flow from one directionSuitable for use in wide range of conditionsCan be made fire resistant and blow-out resistantAvailable in any sizeNo blocked-in volume when the valve is closedAlmost always leaks through the seat, but much more than a gate valve
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Check Valve AttributesCheck valves check about 95% of the timeCheck valves can close suddenly when the flow is reversed, causing severe water hammer
ExcellentTilting Disk
ExcellentC/L Disk
GoodWafer
Severe (improved with spring return)Lift
Severe (improved with weight or spring)Swing
Slam CharacteristicsValve Type
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Butterfly Valve –
Low Pressure
FromAPI 609
Category A
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Butterfly Valve – Low Pressure
Wafer Body, PTFE Lined(Durco)
Lug Body(Contromatics)
ASME B31.3 Process Piping Course 5. Valve Selection
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Butterfly Valve – Low PressureSuitable for on-off applications and throttlingWorks as well with flow from either directionSuitable for use up to ~200°F (95°C), 150 psig (10 bar)Cannot be made fire resistant or blow-out resistantGenerally available NPS 3 and largerNo blocked-in volume when the valve is closedUsually does not leak through the seatCan be PTFE Lined
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Butterfly Valve – High PressureFrom API 609 - Category B Double offset
ASME B31.3 Process Piping Course 5. Valve Selection
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Butterfly Valve – High PressureValve Seats
PTFE Seat(Xomox)
FireResistantSeat(Xomox)
FireResistant
Seat(Contromatics)
Double offset
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Butterfly Valve – High PressureSuitable for on-off applications and throttlingGenerally works as well with flow from either directionSuitable for use in wide range of conditions, but PTFE seats limited to ~400°F (200°C)Can be made fire resistant and blow-out resistantGenerally available NPS 3 and largerNo blocked-in volume when the valve is closedUsually does not leak through the seat
ASME B31.3 Process Piping Course 5. Valve Selection
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Ball Valve
FromAPI 608
FloatingBall,End
Entry
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Ball Valve
FromAPI 608
TrunnionMounted,
TwoPiece
ASME B31.3 Process Piping Course 5. Valve Selection
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Ball Valve
End EntryOval Handle
(Contromatics)
Two PieceLever Handle(Contromatics)
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Ball Valve
Top Entry Three Piece (Swing-out)(Contromatics)
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Ball Valve
Two Piece, Fully Lined (Xomox)
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Ball Valve AttributesOn-off applications (not considered suitable for throttling)Works as well with flow from either directionSuitable for use in wide range of conditions,but PTFE seats limited to ~400 °F (200°C)Can be made fire resistant and blow-out resistantAvailable in any sizeBlocked-in volume when the valve is closedUsually does not leak through the seat
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Plug ValveFrom API 599
Lubricated
Sleeve Lined
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Plug Valve
Fully Lined
(Durco) API 599
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Plug Valve AttributesOn-off applications and non-severe throttlingWorks as well with flow from either directionSuitable for use in wide range of conditions,but PTFE seats limited to ~400 °F (200°C)Can be made fire resistant (only lubricated type) and blow-out resistantGenerally available up to ~NPS 12Blocked-in volume when the valve is closedUsually does not leak through the seat
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Valve Selection WorkshopWhat valve attributes and block, throttle and check valve types would you select for the following services:
Steam condensateDry chlorine liquidSulfuric acidGasoline650 psig (45 bar) SteamHeat transfer oilStyrene monomerLime/water slurry