ASME B16.5 and ASME B16.47 are both standards that specify the dimensions, materials, and pressure-temperature ratings for flanges used in piping systems, but they cater to different applications and sizes.
ASME B16.5
- **Size Range**: Covers flanges from 1/2 inch to 24 inches in nominal pipe size (NPS).
- **Flange Types**: Includes various types such as weld neck, slip-on, threaded, and blind flanges.
- **Pressure Classes**: Available in pressure classes 150, 300, 400, 600, 900, 1500, and 2500.
- **Applications**: Commonly used in smaller piping systems and is widely adopted in various industries.
ASME B16.47
- **Size Range**: Covers larger flanges, specifically from 26 inches to 60 inches in nominal pipe size (NPS).
- **Flange Types**: Primarily focuses on weld neck flanges, but also includes other types.
- **Pressure Classes**: Divided into two series: Series A (based on ANSI/ASME B16.5) and Series B (based on API 605).
- **Applications**: Designed for larger piping systems, often found in oil and gas, chemical processing, and other heavy industries.
Key Differences
1. **Size Range**: B16.5 is for smaller sizes (up to 24 inches), while B16.47 is for larger sizes (26 inches and above).
2. **Flange Types**: B16.5 includes a wider variety of flange types, whereas B16.47 primarily focuses on larger weld neck flanges.
3. **Pressure Ratings**: The pressure classes and ratings differ, with B16.47 accommodating the needs of larger systems.
Post time: Oct-22-2024