Piping Class Reference

Piping Class B2A Valve Specification

Piping Class B2A is the ASME Class 300 stainless steel piping class for medium-pressure corrosive service. Used in high-pressure chemical, pharmaceutical, and corrosive hydrocarbon streams where carbon steel is unacceptable.

ASME Class

ASME Class 300

Design Pressure

51.1 bar (740 psi)

Design Temperature

Up to 400°C (752°F)

Body Material

Stainless Steel CF8M

Design Parameters — B2A

Fluid Service

Stainless Steel Medium Pressure — Corrosive Process to 51 bar

Design Pressure

51.1 bar (740 psi)

Design Temperature

Up to 400°C (752°F)

Corrosion Allowance

Nil

Body Material

Stainless Steel CF8M / A182 F316L

Industries

Chemical manufacturing, Acid process

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 B2A

Valve Type	Rating	End Connection	Body Material	Trim	Seat/Sealing	Notes
Gate Valve	Class 300	RF Flange (ASME B16.5)	CF8M / A182 F316L	SS 316	SS 316 Stellite-6 HF	OS&Y, bolted bonnet
Globe Valve	Class 300	RF Flange	CF8M	SS 316	SS 316 HF	T or Y-pattern
Ball Valve	Class 300	RF Flange	CF8M / F316L	SS 316	RPTFE	Trunnion or floating, fire-safe
Check Valve	Class 300	RF Flange	CF8M	SS 316	SS 316	Swing or piston lift

Typical Industries — B2A

Chemical manufacturingAcid processPharmaceutical APIOffshore chemical injection

Standard Certifications for B2A 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

A2A

ASME Class 300

Medium Pressure — Process, Steam, Hydrocarbons to 50 bar

B1A

ASME Class 150

Stainless Steel — Chemical, Corrosive, Pharmaceutical Service

All Piping Classes

A1A — ASME Class 150 A2A — ASME Class 300 A3A — ASME Class 600 B1A — ASME Class 150 C1A — ASME Class 150 D1A — ASME Class 150 E1A — ASME Class 150 (Cryogenic)

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