Piping Class F1A
Piping Class Spec

Gate Valves — Piping Class F1A

The gate valves specification for piping class F1A (ASME Class 150, Seawater / Brine Service - Duplex 2205 Body, Class 150, PREN ≥35) — body, trim, seat, end connection and rating, ready to quote.

What is the gate valves spec for piping class F1A?

Piping class F1A (ASME Class 150) covers Seawater / Brine Service - Duplex 2205 Body, Class 150, PREN ≥35 with a Duplex Stainless Steel ASTM A890 Grade 4A / A182 F51 (Duplex 2205, UNS S31803/S32205) body material and 0mm (duplex stainless, no corrosion allowance) corrosion allowance, rated for 19.6 bar (284 psi) at 38°C (100°F) at -29°C to +315°C (-20°F to +599°F). The gate valves specification for this class is below.

TypeRatingBodyTrimSeatEnd Conn.
Gate ValveClass 150A890 4A Cast Duplex 2205Duplex 2205 / Stellite 6 HF optionalDuplex 2205 HFRF Flanged (ASME B16.5)
  • -Gate Valve: API 600 / API 603; OS&Y; IGC test per ASTM A262 Pr A or E

Vajra Gate Valves

Robust gate valves for full-flow isolation and on-off service in various industrial systems.

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Other valves in piping class F1A

Gate Valves in other piping classes

Reviewed by Materials Engineering, Vajra Industrial SolutionsDiscipline: Valve Metallurgy & Materials SelectionLast reviewed: 20 June 2026

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