ASTM A182 Floating Ball Valve Description
ASTM A182 floating ball valve is an industrial valve made of duplex stainless steel forgings. Its core lies in the application of ASTM A182 F60 (UNS S32205) material. The following is a detailed analysis:
Structural composition
Core components
Valve body and ball: Made of ASTM A182 F60 forgings (22% chromium, 5% nickel, 3% molybdenum, 0.17% nitrogen), the ferrite and austenite duplex structure each accounts for 50%, taking into account high strength and corrosion resistance.
Valve seat: soft seal (PTFE or fluororubber) or metal hard seal (overlay Stellite alloy), suitable for corrosive media or fluids containing particles.
Valve stem: duplex steel of the same material, with anti-flying shoulder structure (high-pressure anti-slip design).
Safety design
Fireproof structure: The metal seal automatically takes effect after the soft seal burns out.
Anti-static device: It can export the static electricity generated by the rotation of the ball (necessary for flammable media).
Double-line sealing valve seat: low friction design, reducing operating torque.
ASTM A182 Floating Ball Valve specification
| Parameter | General specifications | Extreme Expansion |
|---|---|---|
| Caliber | DN15–DN150(1/2"–6") | Can be customized up to DN300 (12") |
| Pressure level | Class 150–Class 900 | Special designs up to Class 2500 |
| Connection | Flange (ANSI B16.5), thread (NPT), welding | - |
| Temperature range | -29℃ to +260℃ | Hard seal limit up to 550℃ |
ASTM A182 Floating Ball Valve
Advantages
Super corrosion resistance: high chromium-molybdenum content and nitrogen strengthening, PRE value of 35, better resistance to chloride ion pitting/stress corrosion than austenitic stainless steel.
Erosion and wear resistance: Duplex steel has high hardness (HRC≥30), and can withstand the impact of high-speed fluid containing mud and sand.
Reliable bidirectional sealing: The medium pressure pushes the floating ball to press the outlet valve seat, and the leakage level reaches ISO 5208 A level.
Low flow resistance and energy saving: full-bore design, the fluid resistance is close to that of a straight pipe.
High safety: The fireproof and anti-static design has passed API 607/6FA certification.
Applications
Extreme corrosive environment
Sulfur-containing crude oil in refineries, strong acid (hydrochloric acid, sulfuric acid) transportation in chemical plants.
Seawater desalination system, high salt spray environment of offshore platforms.
High-pressure impure medium
Sand-containing fluid in oil and gas field pipelines, coal chemical slurry control.
Gypsum slurry cutoff in power plant desulfurization system.
Safety-sensitive scenarios
LNG low-temperature storage and transportation (requires deep-cold treatment of materials).
Flammable and explosive media (such as natural gas, propane) pipelines.
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