Piping Class Reference
Piping Class A3A Valve Specification
Piping Class A3A covers ASME Class 600 carbon steel valves for high-pressure refinery service, HP steam mains, and high-pressure hydrocarbons. RTJ (Ring Type Joint) facing is common for Class 600 and above.
ASME Class
ASME Class 600
Design Pressure
100 bar (1450 psi)
Design Temperature
Up to 400°C (752°F)
Body Material
Carbon Steel ASTM
Design Parameters — A3A
Fluid Service
High Pressure — Refinery, HP Steam, Oil & Gas to 100 bar
Design Pressure
100 bar (1450 psi)
Design Temperature
Up to 400°C (752°F)
Corrosion Allowance
3mm
Body Material
Carbon Steel ASTM A216 WCB
Industries
Refinery HP process, HP steam mains
Reference Only — Project-Specific Verification RequiredThis piping class specification is a general industry reference. Actual piping class definitions vary by project and company standard (owner specifications). Always verify material, rating, and end-connection requirements against your project's official piping class datasheet or PMS (Piping Material Specification). Vajra Industrial Solutions accepts no liability for specification decisions based on this reference.
Valve Schedule — Piping Class A3A
| Valve Type | Rating | End Connection | Body Material | Trim | Seat/Sealing | Notes |
|---|---|---|---|---|---|---|
| Gate Valve | Class 600 | RF or RTJ (ASME B16.5) | A216 WCB | Stellite-6 HF | Stellite-6 HF | API 600, OS&Y, pressure seal or bolted bonnet |
| Globe Valve | Class 600 | RF or RTJ | A216 WCB | Stellite-6 HF | Stellite-6 HF | Y-pattern preferred for high ΔP |
| Check Valve | Class 600 | RF or RTJ | A216 WCB | Stellite-6 HF | Stellite-6 HF | Tilting disc or piston lift for HP steam |
| Ball Valve | Class 600 | RTJ Flange | A216 WCB | SS 316 / Inconel | RPTFE / metal | Trunnion, fire-safe, API 6D |
Typical Industries — A3A
Refinery HP processHP steam mainsGas compressionHP feedwater
Standard Certifications for A3A Valves
ASME B16.34API 6DAPI 607 (Fire Safe)API 608EN 10204 3.1ISO 9001:2015IBR (Indian Boiler)API 598 Testing
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Related Piping Classes
All Piping Classes
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