ASME Class 150 Flange — NPS 2″
Bolting data and gasket dimensions for ASME B16.5 Class 150 raised face (RF) flanged joints, NPS 2″. Use these values with the Gasket Bolt Load Calculator for full ASME PCC-1 bolt load analysis.
Flange Bolting Data
| Parameter | Value |
|---|---|
| Pipe Size (NPS) | 2″ |
| Pressure Class | Class 150 |
| Number of Bolts | 4 |
| Bolt Diameter | 0.625″ |
| Bolt Tensile Area | 0.226 in² |
| Gasket OD (G) | 3.625″ |
| Bolt Circle Diameter | 4.75″ |
| Flange Face | Raised Face (RF) |
Gasket Selection
Common gasket types for Class 150 service:
- Compressed fiber (CAF) — Low-pressure, non-critical service. Class 150 typical.
- Spiral wound (316SS/graphite) — Standard for Class 300+ and high-temperature service.
- Ring joint (RTJ) — Required for Class 900+ in many specifications. Metal-to-metal seal.
- PTFE envelope — Chemical service where gasket compatibility is critical.
Bolt Torque Guidelines
Target bolt stress per ASME PCC-1: 40,000-50,000 psi for standard applications. Use the Gasket Bolt Load Calculator for exact torque values based on your specific gasket type, bolt material, and lubrication condition.
Related Flange Sizes
Other pressure classes for NPS 2″:
Seal Design Tools
- Gasket Bolt Load Calculator — Interactive ASME PCC-1 flange bolt load analysis
- Seal Groove Calculator — ISO 5597/6195 groove dimensions
- Seal Material Compatibility Checker — Elastomer vs fluid ratings
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