High Temperature Boiler Steam Forged Steel Gate Valve Manufacturers – F22 Material
ASTM A182 F22 (equivalent to 2.25Cr-1Mo) alloy steel provides exceptional high temperature strength and creep resistance, making it the preferred material for boiler steam service.The main gate valve product names of China gate valve Network include:API Electric Lug&wafer Knife-shaped Gate Valve,API Bevel Gear Lug&wafer Knife-shaped Gate Valve,API Pneumatic Lug&wafer Knife-shaped Gate Valve,API Cryogenic Gate Valve,API Flange Gate Valve,Bevel Gear Slurry Valve,Electric Rising Stem Double Disc Parallel Gate Valve,Electric Non-rising Stem Single Disc Wedge Gate Valve.
Understanding F22 Material for Boiler Steam Service
F22 is a chromium-molybdenum alloy steel containing approximately 2.25% chromium and 1% molybdenum. This combination delivers outstanding creep rupture strength at elevated temperatures up to 595°C, excellent resistance to high temperature oxidation, and good weldability. The material is specified in ASTM A182 for forged valve components and is widely used in superheater, reheater, and main steam line services where conventional carbon steel (WCB) would suffer from reduced strength at high temperatures.
Price Reference for F22 Forged Steel Gate Valves
F22 forged steel gate valve prices vary based on size, pressure rating, and certification requirements:
Forged steel gate valves in F22 material with Class 800 ratings typically range in price based on size and connection configuration.
Class 1500 and Class 2500 F22 gate valves for superheater and main steam service command premium pricing reflecting the enhanced material specifications and high temperature design features.
Chinese manufacturers offer competitive pricing compared to European and American brands, with significant cost advantages for bulk orders and standard specifications.
Key factors affecting price include size (DN15-DN600), pressure rating (Class 800-2500), connection type (socket weld vs flanged), and certification requirements (ASME, NACE, CE).
Leading Manufacturers of F22 Forged Steel Gate Valves
Shanghai Hugong Valve Co., Ltd is a leading manufacturer of high pressure, high temperature forged steel gate valves. Their products cover Class 800 to Class 2500 ratings with F22 and F91 materials for power generation applications.
Zhejiang Ouhang Valve Co., Ltd, located in Wenzhou, China, specializes in F22 forged steel gate valves for high temperature steam service. The company offers comprehensive quality control and international certification support.
Reliable Valve Industry manufactures high performance forged steel gate valves for the power and petrochemical industries with ASME, API, and ISO certifications.
Technical Specifications
F22 forged steel gate valves for boiler steam service incorporate several critical features for reliable high temperature operation:
Pressure and Temperature: These valves are available in Class 800, Class 1500, and Class 2500 ratings with temperature capability up to 595°C as per ASME B16.34. The F22 material maintains strength at elevated temperatures where carbon steel WCB would be unsuitable.
Valve Design: Rising stem, bolted bonnet construction is standard, with flexible wedge design to accommodate thermal expansion. Full bore design minimizes pressure drop in steam systems. Hard-faced Stellite 6 overlay on wedge and seat rings provides wear resistance and reliable shutoff.
Connections: Socket weld is preferred for smaller sizes (DN15-DN50) in high pressure steam applications to eliminate threaded leak paths. Flanged connections are available for larger sizes.
Standards: ASTM A182 F22 for material, ASME B16.34 for pressure-temperature ratings, and API 600 for design and manufacturing.
Boiler Steam Applications
F22 forged steel gate valves serve critical functions in high temperature steam systems including main steam isolation, superheater outlet control, reheater protection, boiler blowdown isolation, and turbine bypass steam lines.
Selection Considerations
Pressure rating and temperature capability must match the specific service conditions. For main steam and superheater lines with temperatures above 425°C and pressures up to 25 MPa, F22 provides the required strength. For the most demanding conditions above 580°C, F91 is recommended. Socket weld connections are preferred for high pressure steam applications, and hard-facing wedge and seat rings with Stellite or similar alloys is essential for reliable shutoff and extended service life.
Summary
F22 forged steel gate valves are essential components for reliable boiler steam control at temperatures up to 595°C. Chinese manufacturers such as Shanghai Hugong, Zhejiang Ouhang, and Reliable Valve offer ASME compliant F22 valves for high temperature steam service. Selection requires careful evaluation of pressure rating, temperature capability, and connection type. Consulting with qualified manufacturers who provide certified material test reports and performance documentation ensures reliable long-term operation in critical boiler steam applications.
Do you still need to know or purchase the following gate valve products:
