DN25 PN63 Close-die Forging Steel Globe Valve

설명

TECHNICAL DATA SHEET: PN63  MOD-FORGED STEEL GLOBE VALVE

1. GENERAL SPECIFICATION

• 밸브 유형: Bolted Bonnet Globe Valve, Outside Screw & Yoke (OS&Y), Rising Stem
• 작업: Handwheel (Standard), Gear Operator (Optional), Electric/Pneumatic Actuator (Optional)
• 흐름 방향: Flow Under Plug (Standard, as per API 602/ASME B16.34)
• Design Code: API 602 / ASME B16.34
• 대면: ASME B16.10
• Inspection & Testing: API 598 / Shell MESC SPE 77/300

2. PRESSURE & TEMPERATURE RATINGS

• 압력 등급: ASME 300 LB (PN 50 Equivalent)
• Max. Working Pressure (MWP): Per ASME B16.34 for Group 1.1 Materials
• 온도 범위:
• Min. Temp: -29°C (-20°F) (Standard)
• Max. Temp: +425°C (+800°F) (For A105, limited by seat material)
• Pressure-Temperature Ratings: As per ASME B16.34 Tables for A105 Material.

3. MATERIAL SPECIFICATION (PER ASTM STANDARDS)

• Body & Bonnet: Carbon Steel, ASTM A105 (Forged)
• 줄기: Stainless Steel, ASTM A182 F6a (13Cr) or F316, with Hardened Surface
• Disc (Plug): ASTM A105 + Hardfaced Sealing Surface: Stellite 6 (AWS ERCoCr-A) applied by overlay welding. (Minimum 1.5mm thickness after machining).
• Seat Ring: ASTM A105 + Hardfaced Sealing Surface: Stellite 6 (AWS ERCoCr-A) applied by overlay welding. (Integral or welded-in).
• 틈 메우는 물건: Spiral Wound Gasket, Stainless Steel (SS316) Filler + Flexible Graphite Filler, SS316 Inner/Outer Ring. (Alternative: Ring Type Joint (RTJ) per ASME B16.20).
• Bolting: ASTM A193 B7 Studs / ASTM A194 2H Nuts
• 포장: Flexible Graphite (Standard), PTFE or Graphite/PTFE Composite (Optional for lower temps)
• Packing Box: Live-loaded packing gland (Standard) for reliable sealing.
• Yoke: ASTM A216 WCB (Cast) or A105 (Forged)
• Handwheel: Ductile Iron (ASTM A536) or Carbon Steel (AISI 1018)

4. CONNECTIONS & SEALING

• End Connections:
• 기준: Raised Face (RF) Flange per ASME B16.5 Class 800.
• Alternative: Ring Type Joint (RTJ) Flange per ASME B16.5 Class 800.
• Face Finish: ASME B16.5 RF Finish (125-250 µin Ra)
• Body-Bonnet Sealing: Spiral Wound Gasket (as above) or RTJ (if specified).

5. STELLITE SEALING (CRITICAL FEATURE)

• Sealing Surfaces: Both Disc (Plug) and Seat Ring mating surfaces.
• Material: Stellite 6 (Cobalt-Chromium-Tungsten-Carbon Alloy, ASTM F75 equivalent).
• Application Method: Plasma Transferred Arc (PTA) or TIG Overlay Welding.
• Thickness: Minimum 1.5mm (0.060″) after final machining.
• Hardness: Approx. 40-45 HRC.
• Benefits: Excellent galling resistance, high erosion resistance, good high-temperature strength, superior corrosion resistance compared to base A105.

6. 디자인 특징

• Bonnet Joint: Bolted Bonnet (Standard). Welded Bonnet (Optional for severe service).
• 스템 디자인: Rising Stem, Non-Rotating. Backseat Feature (API 602 Requirement).
• Stem Sealing: Multiple rings of flexible graphite packing, gland follower, live-loading springs.
• Stem Nut: Bronze or CuNi alloy (self-lubricating).
• 누설 등급: Class IV (Metal Seat) per API 598 (Standard). Class V or VI achievable with lapping (Consult Factory).
• Fire Safe Design: API 607 / API 6FA compliant packing & secondary metal seals (Optional).

7. TESTING (PER API 598)

• Shell Test: 1.5 x Class Rating Pressure (1200 PSI) with water.
• Seat Test: 1.1 x Class Rating Pressure (880 PSI) with air or water (both directions for globe valve).
• Backseat Test: 1.1 x Class Rating Pressure (880 PSI) with air or water.
• High Pressure Gas Test (Optional): Per customer specification.
• Documentation: Certified Test Reports (CTRs) available.

8. MARKING & IDENTIFICATION

• Marked per MSS SP-25 / ASME B16.34. Includes:
• Manufacturer Name or Trademark
• Pressure Class (800)
• Material Designation (A105)
• Size (e.g., 2″ NPS)
• Heat Number (Body/Bonnet)
• “OS&Y” or “RS”
• Unique Serial Number (Traceable)
• Direction of Flow Arrow
• “Stellite Trim” (or Trim Code per API 600/602)
• Tag: Stainless Steel tag with key data.

9. PAINTING & PACKING

• External Surface Preparation: Blast cleaned to Sa 2½ (ISO 8501-1).
• Primer: High-quality epoxy primer.
• Finish Coat: Epoxy paint, RAL 7012 (Standard Grey) or customer-specified color.
• End Protection: Plastic or Metal Caps/Blinds suitable for Class 800 pressure.
• 포장: Wooden crate or export-quality plywood case suitable for marine transport.

10. OPTIONS

• Gear Operator (Bevel or Worm Gear)
• Electric / Pneumatic / Hydraulic Actuators
• Extended Bonnet/Body for Cold Box or Insulation
• Cryogenic Service Design (-196°C / -320°F)
• Bellows Seal Stem
• Position Indicators (Mechanical/Electric)
• Locking Device
• Special Painting (e.g., Offshore, High Temp)
• NACE MR0175/ISO 15156 Compliance (H2S Service)
• Fugitive Emission Certification (ISO 15848-1, TA-Luft, SHELL SPE 77/312)

보증

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