Views: 0 Author: J-VALVES Publish Time: 2025-01-13 Origin: Site
• Standard: ASME B16.34 is a widely recognized standard for ball valves, developed by the American Society of Mechanical Engineers (ASME). It covers the design, manufacturing, and testing of ball valves with flanged, threaded, and welding end connections.
• Pressure Ratings: ASME B16.34 ball valves have pressure ratings ranging from Class 150 to Class 2500, making them suitable for high-pressure applications.
• Temperature Range: These valves are designed to operate reliably at temperatures ranging from -29°C to 121°C, with specific materials allowing for even higher temperature applications.
• Design Features: ASME B16.34 ball valves often feature a floating ball design, which allows the ball to move slightly under pressure, ensuring a tight seal against the seat. This design provides bidirectional sealing, making it suitable for applications where flow direction may change.
• Testing: Valves undergo rigorous hydrostatic and pneumatic tests at 1.5 times the maximum allowable working pressure (MAWP) to ensure compliance with the standard.
• Standard: GB/T 12237 is a Chinese national standard for gate valves, widely used in domestic and international pipeline systems. It covers flanged and butt-welded steel gate valves.
• Pressure Ratings: GB/T 12237 gate valves have pressure ratings ranging from PN10 to PN100, making them suitable for a wide range of applications.
• Temperature Range: These valves are designed to operate reliably at temperatures ranging from -20°C to 200°C, with specific materials allowing for even higher temperature applications.
• Design Features: GB/T 12237 gate valves feature a wedge-shaped gate that compresses against the seat to provide tight shutoff. This design is particularly effective in on-off control applications.
• Testing: Valves undergo comprehensive testing, including hydrostatic and pneumatic tests, to ensure compliance with the standard.
| Feature | ASME B16.34 Ball Valves | GB/T 12237 Gate Valves |
| Design | Floating ball, bidirectional sealing | Wedge gate, unidirectional sealing |
| Pressure Ratings | Class 150 to Class 2500 | PN10 to PN100 |
| Temperature Range | -29°C to 121°C | -20°C to 200°C |
| Sealing Performance | Bidirectional sealing with minimal leakage | Excellent tight shutoff in one direction |
| Materials | Stainless steel, high-temperature alloys | Carbon steel, stainless steel, high-temperature alloys |
| Safety Features | Fire-safe design, double block-and-bleed, blowout-proof stem | Fire-safe design, tight shutoff |
| Applications | Oil and gas, chemical processing | Process plants, water treatment |
