Cryogenic Open Die Forged Globe Valve
Description
Cryogenic Globe Valve Technical Data Sheet
Project Name: ________________________
Project No.: ________________________
Tag No.: ________________________
Date: ________________________
1. Valve General Information
| Parameter | Specification |
|---|---|
| Valve Type | Globe Valve |
| Body Manufacturing Process | Free Forging (Solid Forged) |
| Nominal Size (DN / NPS) | ______ mm / ______ inch |
| Pressure Rating (PN / Class) | ______ bar / ______ lb (e.g., Class 150 / 300 / 600) |
| End Connection | Butt Weld (BW) / Flanged (RF/RJ) / Socket Weld (SW) (Specify) |
| Connection Standard | ASME B16.25 / ASME B16.5 / ASME B16.11 (Specify) |
| Design Standard | ASME B16.34 / BS 6364 (Cryogenic Valves) |
| Cryogenic Test Standard | BS 6364 / ISO 28921 |
2. Free Forging Process Features
| Feature | Description |
|---|---|
| Process Description | The valve body is manufactured using the free forging process (upsetting/drawing out), eliminating casting defects and achieving a dense, continuous metal grain structure. |
| Material Density | Forging produces a homogeneous structure with no porosity or shrinkage cavities, providing superior impact resistance and crack resistance under extreme cryogenic conditions. |
| Grain Refinement | The forging process refines the grain structure, enhancing material toughness and strength at low temperatures (e.g., -196°C). |
| Reliability | The fully forged construction is ideal for -196°C (liquid nitrogen) and lower temperature services, eliminating risks associated with casting defects. |
3. Cryogenic Design Features
| Feature | Description |
|---|---|
| Extended Bonnet | Extended bonnet design ensures the stuffing box/packing area is located outside the cold zone, preventing packing freezing and ensuring smooth stem operation. The neck length is designed per BS 6364 to meet thermal insulation requirements. |
| Drip Plate | A drip plate is provided on the bonnet neck to prevent condensate from entering the packing and operating mechanism. |
| Pressure Relief | Body/bonnet equipped with internal pressure relief hole(s) (for media like liquid nitrogen/oxygen that can vaporize rapidly) to prevent over-pressurization in the bonnet cavity. |
| Disc/Seat Design | Sealing surfaces are STL (Stellite) hardfaced for erosion resistance; or utilize PCTFE disc inserts for bubble-tight shut-off. |
| Stem | Stem surface is Chrome Plated / Nitrided for wear and corrosion resistance; features blow-out proof design for safety. |
4. Materials of Construction
| Component | Material |
|---|---|
| Body | ASTM A182 F304 / F304L / F316 / F316L Stainless Steel (Free Forged) |
| Bonnet | ASTM A182 F304 / F304L / F316 / F316L Stainless Steel (Free Forged) |
| Disc | ASTM A182 F304 / F316 + STL Hardfacing or PCTFE Insert |
| Seat | Integral or Threaded Type, STL Hardfaced or Renewable PCTFE Seat |
| Stem | ASTM A182 F304 / F316 Stainless Steel, Chrome Plated / Nitrided |
| Extended Bonnet | ASTM A182 F304 / F316 Stainless Steel (Forged) |
| Packing | Flexible Graphite / PTFE + Carbon Fiber (Cryogenic grade) |
| Gasket | Stainless Steel Wound + Graphite / PTFE |
| Bolting/Nuts | ASTM A320 Gr.L7 (Low Temp) / ASTM A194 Gr.4 |
5. Cryogenic Testing (Per BS 6364 / ISO 28921)
| Test Type | Requirements |
|---|---|
| Shell Test (Ambient) | 1.5 times rated pressure, water or gas |
| Seat Test (Ambient) | 1.1 times rated pressure, water or gas |
| Cryogenic Seat Test | Valve is cooled to stable condition in liquid nitrogen (-196°C) . Seat leakage must meet zero leakage or allowable leakage rates per BS 6364 (typically bubble-tight or no visible leakage). |
| Cold Operation Test | Valve is operated (open/close) at cryogenic temperature to verify torque and operational smoothness. |
6. Applicable Standards & Specifications
| Item | Standard |
|---|---|
| Design & Manufacturing | ASME B16.34, BS 6364 (Cryogenic Valves) , ISO 28921 |
| Face-to-Face Dimensions | ASME B16.10 / Manufacturer Standard |
| End Connections | ASME B16.25 (BW) / ASME B16.5 (Flanged) / ASME B16.11 (SW) |
| Pressure Testing | API 598 / ISO 5208 + BS 6364 Cryogenic Test |
| Materials | ASTM Standards |
| Low Temp. Impact Test | Materials must undergo -196°C Charpy V-Notch Impact Testing with values meeting standard requirements. |
7. Dimensions & Connections (Reference Only)
| Dimension | Value (mm) |
|---|---|
| Face-to-Face Length L | _____ (Per ASME B16.10 or BS 6364) |
| Extended Bonnet Height H | _____ (Designed per BS 6364 for thermal insulation) |
| Drip Plate Location | _____ |
| Handwheel Diameter | _____ |
| Approx. Weight | _____ kg |
8. Other Requirements
| Item | Specification |
|---|---|
| Service Medium | LNG (Liquefied Natural Gas) / LIN (Liquid Nitrogen) / LOX (Liquid Oxygen) / LAr (Liquid Argon) / Ethylene, etc. |
| Design Temperature | -196°C (or lower as required) |
| Design Pressure | As per ASME B16.34 for corresponding temperature |
| Special Treatment | Oxygen Cleaning (Degreasing): Mandatory for oxygen, nitrogen, and other critical services. Must be strictly degreased and cleaned with certification. |
| Anti-Static Device | Per API 608 or BS 6364 requirements. |
| Fire Safe Design | Optional: API 607 / ISO 10497 Fire Safe certification. |
Notes:
-
The Free Forged body ensures material density and reliability under extreme cryogenic conditions with zero casting defects.
-
Valve design strictly complies with BS 6364 cryogenic valve standard, ensuring sealing performance at -196°C.
-
For Oxygen service, Oxygen Cleaning (Degreasing) must be explicitly specified with cleanliness certification.
-
Extended bonnet length is calculated based on media temperature to ensure the packing box temperature remains above 0°C.
