ASME B16.5 Class 600 Weld Neck Flange Dimensions & Weight
Precision closed-die drop forged and CNC machined from heat-tracked billets at our Rajkot manufacturing facility. Engineered with unbroken grain flow for high-pressure service up to 1480 psi @ 100°F (102.1 bar ambient), adhering to EN 10204 3.1 and ISO 9001:2015 quality requirements.
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ASME B16.5 Class 600 Weld Neck Flanges are engineered for severe high-pressure service up to 1480 psi. Features an elevated 1/4-inch raised face or RTJ groove, drop-forged strictly up to 50 kg per piece at Rajkot for petrochemical cracking and offshore transmission.
ASME B16.5 Class 600 Weld Neck Flange Dimensions & Weight — Dimensions & Weight Chart
All dimensions in millimeters (mm) and nominal weights in kilograms (kg) strictly manufactured up to 50 kg per piece.
| NPS | Metric DN | Outside Dia (OD mm) | Flange Thickness (mm) | Bolt Circle PCD (mm) | No. of Bolts | Hole Dia (mm) | Approx Weight (kg) |
|---|---|---|---|---|---|---|---|
| 1/2" | DN15 | 95 mm | 14.3 mm | 66.5 mm | 4 | 16 mm | 1.6 kg✔ (≤50kg) |
| 3/4" | DN20 | 117 mm | 15.9 mm | 82.5 mm | 4 | 19 mm | 2.6 kg✔ (≤50kg) |
| 1" | DN25 | 124 mm | 17.5 mm | 89 mm | 4 | 19 mm | 3.4 kg✔ (≤50kg) |
| 1-1/4" | DN32 | 133 mm | 20.6 mm | 98.5 mm | 4 | 19 mm | 4.5 kg✔ (≤50kg) |
| 1-1/2" | DN40 | 156 mm | 22.3 mm | 114.5 mm | 4 | 22 mm | 6.2 kg✔ (≤50kg) |
| 2" | DN50 | 165 mm | 25.4 mm | 127 mm | 8 | 19 mm | 8.5 kg✔ (≤50kg) |
| 2-1/2" | DN65 | 190 mm | 28.6 mm | 149 mm | 8 | 22 mm | 12.8 kg✔ (≤50kg) |
| 3" | DN80 | 210 mm | 31.8 mm | 168.5 mm | 8 | 22 mm | 17.5 kg✔ (≤50kg) |
| 4" | DN100 | 273 mm | 38.1 mm | 216 mm | 8 | 25 mm | 32 kg✔ (≤50kg) |
| 6" | DN150 | 356 mm | 47.7 mm | 292 mm | 12 | 28 mm | 48.5 kg✔ (≤50kg) |
Available Metallurgical Grades
- ASTM A105 Carbon Steel — 100% heat batch tracked with full chemical and mechanical certification.
- ASTM A350 LF2 — 100% heat batch tracked with full chemical and mechanical certification.
- SS 316L — 100% heat batch tracked with full chemical and mechanical certification.
- Alloy 4140 / 4340 — 100% heat batch tracked with full chemical and mechanical certification.
- Duplex 2205 — 100% heat batch tracked with full chemical and mechanical certification.
Primary Engineering Applications
- Gas Compressor Stations
- Offshore Subsea Manifolds
- High Pressure Steam Injection
- Refinery Hydrocrackers
Rajkot Facility Manufacturing & Global Logistics Corridors
This component is hot-forged on high-speed closed-die friction presses and CNC finished at our Rajkot manufacturing center located at Plot No. 42/43, GIDC Industrial Estate, Rajkot, Gujarat - 360002, India. Global ocean freight dispatches weekly via Port Mundra (240 km) and Port Kandla (230 km) with rapid transit to Houston USA, Rotterdam Europe, and Dubai UAE.
Related Flange Standards & Pressure Ratings
ASME B16.5 Class 150 Weld Neck Flange Dimensions & Weight
Weight: Up to 50 kg max
ASME B16.5 Class 300 Weld Neck Flange Dimensions & Weight
Weight: Up to 50 kg max
ASME B16.5 Class 900 Weld Neck Flange Dimensions & Weight
Weight: Up to 50 kg max
ASME B16.5 Class 1500 Weld Neck Flange Dimensions & Weight
Weight: Up to 50 kg max
ASME B16.5 Class 2500 Weld Neck Flange Dimensions & Weight
Weight: Up to 50 kg max
ASME B16.5 Class 150 Slip-On Flange Dimensions & Weight
Weight: Up to 50 kg max
Frequently Asked Questions: ASME B16.5 Class 600 Weld Neck Flange Dimensions & Weight
Class 600 flanges feature a heavy-duty 1/4-inch (6.4 mm) raised face, compared to the 1/16-inch (1.6 mm) raised face found on Class 150 and 300 flanges.
Yes, 100% of our Class 600 forgings undergo Level II Ultrasonic Examination (ASTM A388) and Magnetic Particle / Dye Penetrant testing before CNC machining.
Jayesh Forge enforces a strict 50 kg piece weight limit, ensuring rapid tooling turnaround and maximum dimensional accuracy.