12″ * 10″-600LB Open Die Forged Adjustable Choke Valve
Description
TECHNICAL DATA SHEET
Free Forged Throttling Valve / Choke Valve
Project / Equipment: High Pressure Throttling Valve
Item No.: _______________
Tag No.: _______________
Date: _______________
1. BASIC VALVE INFORMATION
| Item | Specification |
|---|---|
| Valve Type | Needle / Choke Type Throttling Valve (Globe pattern or Angle pattern) |
| End Connection | Flanged, Raised Face (RF) |
| Body Manufacturing Process | Open Die Forging (Free Forging) |
| Nominal Size | NPS 12 × 10 (DN300 × DN250) |
| Port Reduction | Inlet 12″, Internal seat bore reduced to 10″ |
| Pressure Class | Class 600 (ASME B16.5) |
| Body Material | A105 (Carbon Steel) |
| Service Medium | Water / Oil / Gas / Steam (as per process) |
2. APPLICABLE CODES & STANDARDS
| Standard | Description |
|---|---|
| API 6A | Specification for Wellhead and Christmas Tree Equipment (if applicable to choke design) |
| API 6D | Specification for Pipeline and Piping Valves |
| ASME B16.34 | Valve Flange, Threaded, and Welding End Dimensions |
| ASME B16.5 | Pipe Flanges and Flanged Fittings (Class 600 RF) |
| ASME B16.10 | Face-to-Face and End-to-End Dimensions of Valves |
| API 598 / ISO 5208 | Valve Inspection and Testing |
| ASTM A105 / ASME SA-105 | Forgings, Carbon Steel, for Piping Components |
3. MATERIALS OF CONSTRUCTION
| Component | Material | Standard / Remarks |
|---|---|---|
| Body | A105 | Open die forged, normalized |
| Bonnet / Cover | A105 | Forged, bolted bonnet design |
| Disc / Plug / Needle | A105 + Hardfacing | Stellite 6 / 13Cr – erosion resistant |
| Seat Ring | A105 + Hardfacing | Integral or renewable, hardfaced sealing surface |
| Stem | A182 F6a (13Cr) | Stainless steel, anti-galling |
| Packing | Flexible Graphite | With Inconel wire reinforcement |
| Gasket | Spiral Wound | 304SS + Graphite |
| Stud Bolts | A193 B7 | High strength alloy steel |
| Nuts | A194 2H | Carbon steel |
4. DESIGN & PERFORMANCE CHARACTERISTICS
| Parameter | Specification |
|---|---|
| Pressure Class | Class 600 |
| Max. Allowable Working Pressure | Per ASME B16.34, A105 @ 38°C: ~ 1480 psi (102 bar) |
| Design Temperature Range | -29°C to +425°C (-20°F to +800°F) |
| Flow Characteristic | Linear / Equal Percentage |
| Seat Leakage Rate | Class IV or Class V per FCI 70-2 / IEC 60534 |
| Operation | Handwheel / Gearbox / Actuator ready |
| Flow Direction | Flow over seat (preferred) or Flow under seat |
5. DIMENSIONS & CONNECTIONS
| Item | Dimension (inch / mm) |
|---|---|
| Inlet Flange | 12″ Class 600 RF per ASME B16.5 |
| Outlet Flange | 12″ Class 600 RF per ASME B16.5 |
| Face-to-Face Length | Per API 6D / ASME B16.10 or manufacturer standard |
| Reduced Bore Diameter | Corresponding to NPS 10 (approx. 10″ seat bore) |
| Handwheel Diameter | As per manufacturer |
| Approx. Weight | As per manufacturer |
6. SPECIAL REQUIREMENTS & REMARKS
-
Free Forging Process
Valve body shall be manufactured from open die forging using ingot or large billet.
Machining from bar stock or casting is NOT acceptable. -
Reduced Port Design
Flange size: NPS 12
Internal seat bore and throttling area: Equivalent to NPS 10
Designed for precise pressure and flow control. -
Hardfacing & Wear Resistance
Seat and disc contact surfaces shall be hardfaced with Stellite 6 or equivalent.
Minimum hardness after welding: 350–450 HB. -
Nondestructive Examination (NDE)
Body forging to be ultrasonically tested per ASTM A388.
Critical areas (seat, bore, welds) to be MT or PT examined. -
Compliance
Valve design, materials, and testing to fully comply with API 6A (if choke valve) and API 6D (pipeline valve) requirements.
