What is the design pressure for piping class A3A valves?

Piping class A3A is rated for a design pressure of 100 bar (1450 psi) at a design temperature of Up to 400°C (752°F). Fluid service: High Pressure - Refinery, HP Steam, Oil & Gas to 100 bar. Corrosion allowance: 3mm.

What valve types are specified in piping class A3A?

Piping class A3A includes: Gate Valve, Globe Valve, Check Valve, Ball Valve. All valves are to ASME Class 600 rating with Carbon Steel ASTM A216 WCB body material.

What body material is required for piping class A3A?

The body material for piping class A3A is Carbon Steel ASTM A216 WCB. This is selected for High Pressure - Refinery, HP Steam, Oil & Gas to 100 bar service at 100 bar (1450 psi) and Up to 400°C (752°F).

Which industries use piping class A3A?

Piping class A3A is typically used in: Refinery HP process, HP steam mains, Gas compression, HP feedwater. Vajra Industrial Solutions supplies all valve types to A3A specification with full EN 10204 3.1 material certificates, hydrostatic test certificates, and dimensional inspection reports.

Home Piping ClassesA3A

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

What is piping class Piping Class A3A?

Piping Class A3A covers ASME Class 600 carbon steel valves for high-pressure refinery service, HP steam mains, and high-pressure hydrocarbons.

ASME Class:: ASME Class 600
Service:: High Pressure - Refinery, HP Steam, Oil & Gas to 100 bar
Body Material:: Carbon Steel ASTM A216 WCB

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