Piping Class A3A
Piping Class Spec

Check Valves — Piping Class A3A

The check valves specification for piping class A3A (ASME Class 600, High Pressure - Refinery, HP Steam, Oil & Gas to 100 bar) — body, trim, seat, end connection and rating, ready to quote.

What is the check valves spec for piping class A3A?

Piping class A3A (ASME Class 600) covers High Pressure - Refinery, HP Steam, Oil & Gas to 100 bar with a Carbon Steel ASTM A216 WCB body material and 3mm corrosion allowance, rated for 100 bar (1450 psi) at Up to 400°C (752°F). The check valves specification for this class is below.

TypeRatingBodyTrimSeatEnd Conn.
Check ValveClass 600A216 WCBStellite-6 HFStellite-6 HFRF or RTJ
  • -Check Valve: Tilting disc or piston lift for HP steam

Vajra Check Valves

Non-return valves to prevent backflow and protect equipment in piping systems.

See the full Check Valves range

Other valves in piping class A3A

Gate Valves — A3AGlobe Valves — A3ABall Valves — A3A

Check Valves in other piping classes

Check Valves — A1ACheck Valves — A2ACheck Valves — B1ACheck Valves — B2ACheck Valves — C1ACheck Valves — D1ACheck Valves — E1ACheck Valves — A4ACheck Valves — A5ACheck Valves — A6A
Reviewed by Materials Engineering, Vajra Industrial SolutionsDiscipline: Valve Metallurgy & Materials SelectionLast reviewed: 20 June 2026

Connected Engineering

Standards
ASME B16.34
Materials
A216 WCB Carbon Steel
Products
Check Valves

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Vajra Check Valves

Engineering references

Piping Class A3AFull valve schedule & specPiping Class Quick ReferenceAll classes comparedVajra Check ValvesFull range, specs & standards