Technical specs, pressure-temperature ratings, facing types (RF, RTJ, FF), and bolt hole dimensions for ASME B16.5 pipe flanges in Class 150 to Class 2500.
Standard commercial & industrial process plant flanges.
High-pressure oil & gas transmission lines.
Subsea and ultra-high pressure steam power plants.
| NPS (Inches) | Outside Dia (mm) | Class 150 / 2000 Rating | Class 300 / 3000 Rating | Class 600 / 6000 Rating |
|---|---|---|---|---|
| 1/2" | 89 mm | Class 150 (4 Holes) | Class 300 (4 Holes) | Class 600 (4 Holes) |
| 1" | 108 mm | Class 150 (4 Holes) | Class 300 (4 Holes) | Class 600 (4 Holes) |
| 2" | 152 mm | Class 150 (4 Holes) | Class 300 (4 Holes) | Class 600 (8 Holes) |
| 4" | 229 mm | Class 150 (8 Holes) | Class 300 (8 Holes) | Class 600 (8 Holes) |
ASME B16.5 covers flange sizes from NPS 1/2" up to NPS 24". Sizes 26" to 60" are governed by ASME B16.47.
Delivering precision-engineered flanges, pipes, and forged steel components designed for strength, durability, and performance in critical high-pressure industrial applications.