ASME B16.5 Class 150 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 285 psi @ 100°F (19.6 bar ambient), adhering to EN 10204 3.1 and ISO 9001:2015 quality requirements.
Quick AnswerFeatured
ASME B16.5 Class 150 Weld Neck Flanges are forged with a tapered hub for butt-welding directly to process pipe. Precision drop-forged in Rajkot, Gujarat strictly up to 50 kg per piece with continuous grain flow for pressure containment in oil, gas, and chemical refining lines.
ASME B16.5 Class 150 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 | 89 mm | 11.2 mm | 60.5 mm | 4 | 16 mm | 0.9 kg✔ (≤50kg) |
| 3/4" | DN20 | 98 mm | 12.7 mm | 70 mm | 4 | 16 mm | 1.2 kg✔ (≤50kg) |
| 1" | DN25 | 108 mm | 14.3 mm | 79.5 mm | 4 | 16 mm | 1.8 kg✔ (≤50kg) |
| 1-1/4" | DN32 | 117 mm | 15.9 mm | 89 mm | 4 | 16 mm | 2.4 kg✔ (≤50kg) |
| 1-1/2" | DN40 | 127 mm | 17.5 mm | 98.5 mm | 4 | 16 mm | 3 kg✔ (≤50kg) |
| 2" | DN50 | 152 mm | 19.1 mm | 120.5 mm | 4 | 19 mm | 4.4 kg✔ (≤50kg) |
| 2-1/2" | DN65 | 178 mm | 22.3 mm | 139.5 mm | 4 | 19 mm | 6.8 kg✔ (≤50kg) |
| 3" | DN80 | 190 mm | 23.9 mm | 152.5 mm | 4 | 19 mm | 8 kg✔ (≤50kg) |
| 4" | DN100 | 229 mm | 23.9 mm | 190.5 mm | 8 | 19 mm | 11.5 kg✔ (≤50kg) |
| 6" | DN150 | 279 mm | 25.4 mm | 241.5 mm | 8 | 22 mm | 19 kg✔ (≤50kg) |
| 8" | DN200 | 343 mm | 28.6 mm | 298.5 mm | 8 | 22 mm | 30 kg✔ (≤50kg) |
| 10" | DN250 | 406 mm | 30.2 mm | 362 mm | 12 | 25 mm | 42 kg✔ (≤50kg) |
| 12" | DN300 | 483 mm | 31.8 mm | 432 mm | 12 | 25 mm | 49.5 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 304 / 304L — 100% heat batch tracked with full chemical and mechanical certification.
- SS 316 / 316L — 100% heat batch tracked with full chemical and mechanical certification.
- Duplex 2205 (F51) — 100% heat batch tracked with full chemical and mechanical certification.
Primary Engineering Applications
- Refinery Process Piping
- Low Pressure Utility Headers
- Chemical Transfer Mains
- Offshore Water Injection Lines
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 300 Weld Neck Flange Dimensions & Weight
Weight: Up to 50 kg max
ASME B16.5 Class 600 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 150 Weld Neck Flange Dimensions & Weight
Class 150 weld neck flanges forged in carbon steel (ASTM A105) carry a maximum working pressure rating of 285 psig at ambient temperature (100°F / 38°C), derating at higher operational temperatures.
Jayesh Forge specializes in high-speed precision closed-die forging strictly up to 50 kg per piece, covering sizes from 1/2" up to 12" NB with EN 10204 3.1 MTC inspection.
Our manufacturing facility in Rajkot, Gujarat is strategically located 240 km from Port Mundra and 230 km from Port Kandla, ensuring rapid container stuffing and global dispatch.