Piping Class Reference
Piping Class A2A Valve Specification
Piping Class A2A is the ASME Class 300 carbon steel piping class for medium-pressure process and steam service. Used in refinery process streams, boiler steam mains, and chemical plant medium-pressure headers.
ASME Class
ASME Class 300
Design Pressure
50 bar (725 psi)
Design Temperature
Up to 350°C (662°F)
Body Material
Carbon Steel ASTM
Design Parameters — A2A
Fluid Service
Medium Pressure — Process, Steam, Hydrocarbons to 50 bar
Design Pressure
50 bar (725 psi)
Design Temperature
Up to 350°C (662°F)
Corrosion Allowance
3mm
Body Material
Carbon Steel ASTM A216 WCB
Industries
Refinery process, Petrochemicals
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 A2A
| Valve Type | Rating | End Connection | Body Material | Trim | Seat/Sealing | Notes |
|---|---|---|---|---|---|---|
| Gate Valve | Class 300 | RF Flange (ASME B16.5) | A216 WCB | 13Cr / Stellite-6 HF | Stellite-6 HF | API 600, OS&Y, bolted bonnet |
| Globe Valve | Class 300 | RF Flange (ASME B16.5) | A216 WCB | Stellite-6 | Stellite-6 | T or Y-pattern, OS&Y |
| Check Valve | Class 300 | RF Flange (ASME B16.5) | A216 WCB | Stellite-6 | Stellite-6 | Swing or tilting disc |
| Ball Valve (2" and below) | Class 300 | Screwed/SW | A105 Forged | SS 316 | PTFE | Full bore, fire-safe |
| Ball Valve (3" and above) | Class 300 | RF Flange (ASME B16.5) | A216 WCB | SS 316 | PTFE / RPTFE | Trunnion, fire-safe, antistatic |
Typical Industries — A2A
Refinery processPetrochemicalsSteam generationHigh-pressure utilities
Standard Certifications for A2A Valves
ASME B16.34API 6DAPI 607 (Fire Safe)API 608EN 10204 3.1ISO 9001:2015IBR (Indian Boiler)API 598 Testing
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