310S American Standard Flange Ball Valve

Description

310S (UNS S31008 / 06Cr25Ni20) is a high-alloy austenitic stainless steel designed specifically for high-temperature service:

• Low Carbon Content: The “S” designation indicates a lower carbon version, which minimizes carbide precipitation during welding or long-term high-temperature exposure.
• Superior Oxidation Resistance: The high chromium and nickel content allows the valve to resist oxidation at continuous temperatures up to 1050°C and intermittent temperatures up to 1150°C.
• Carburization Resistance: Performs exceptionally well in moderately carburizing atmospheres, such as those found in petrochemical environments.
• Structural Stability: 310S maintains high creep strength and mechanical toughness at elevated temperatures, preventing the valve body from deforming under thermal stress.

Features

• ANSI/ASME Global Compliance: Fully compliant with ASME B16.34 (pressure/temperature ratings), ASME B16.5 (flanges), and ASME B16.10 (face-to-face), ensuring seamless integration into international high-heat piping systems.
• High-Temperature Sealing: Typically equipped with Metal-to-Metal seats or specialized high-temperature flexible graphite seals. This ensures reliable shut-off in environments where soft seats like PTFE would melt.
• Extended Stem Design: Often features an extended bonnet or stem to move the actuator (manual or automated) away from the heat source, protecting the operator and electrical components.
• Full Bore Flow: The internal flow path matches the pipe’s bore, providing minimal flow resistance and ensuring that high-velocity hot gases or fluids pass through with negligible pressure drop.
• Fire-Safe & Anti-Static: Includes safety features such as an anti-static device and a fire-safe structure to maintain integrity during emergency thermal excursions.

Specifications

Applications

• Petrochemical Refining: High-temperature furnace piping, catalytic reformers, and flare systems.
• Heat Treatment: Industrial furnaces, kilns, and thermal processing equipment.
• Power Generation: High-temperature steam isolation and exhaust gas management.
• Environmental Protection: Waste incineration systems and thermal oxidizers.