ASME B16.5 Class 150 Blind 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.
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ASME B16.5 Class 150 Blind Flanges seal the end of a piping system or pressure vessel nozzle to allow line isolation or future expansion. Drop forged from solid heat-tracked steel billets up to 50 kg per piece at our Rajkot manufacturing plant.
ASME B16.5 Class 150 Blind 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 | 0.8 kg✔ (≤50kg) |
| 3/4" | DN20 | 98 mm | 12.7 mm | 70 mm | 4 | 16 mm | 1.1 kg✔ (≤50kg) |
| 1" | DN25 | 108 mm | 14.3 mm | 79.5 mm | 4 | 16 mm | 1.5 kg✔ (≤50kg) |
| 1-1/2" | DN40 | 127 mm | 17.5 mm | 98.5 mm | 4 | 16 mm | 2.6 kg✔ (≤50kg) |
| 2" | DN50 | 152 mm | 19.1 mm | 120.5 mm | 4 | 19 mm | 4.2 kg✔ (≤50kg) |
| 3" | DN80 | 190 mm | 23.9 mm | 152.5 mm | 4 | 19 mm | 8.5 kg✔ (≤50kg) |
| 4" | DN100 | 229 mm | 23.9 mm | 190.5 mm | 8 | 19 mm | 13 kg✔ (≤50kg) |
| 6" | DN150 | 279 mm | 25.4 mm | 241.5 mm | 8 | 22 mm | 22 kg✔ (≤50kg) |
| 8" | DN200 | 343 mm | 28.6 mm | 298.5 mm | 8 | 22 mm | 35 kg✔ (≤50kg) |
| 10" | DN250 | 406 mm | 30.2 mm | 362 mm | 12 | 25 mm | 50 kg✔ (≤50kg) |
Available Metallurgical Grades
- ASTM A105 Carbon Steel — 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.
- SS 202 — 100% heat batch tracked with full chemical and mechanical certification.
- A350 LF2 — 100% heat batch tracked with full chemical and mechanical certification.
- Duplex F51 — 100% heat batch tracked with full chemical and mechanical certification.
Primary Engineering Applications
- Pipe Header Isolation
- Hydrostatic Pressure Test Blinds
- Vessel Inspection Nozzle Closure
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
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ASME B16.5 Class 300 Weld Neck Flange Dimensions & Weight
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ASME B16.5 Class 600 Weld Neck Flange Dimensions & Weight
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ASME B16.5 Class 900 Weld Neck Flange Dimensions & Weight
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ASME B16.5 Class 1500 Weld Neck Flange Dimensions & Weight
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ASME B16.5 Class 2500 Weld Neck Flange Dimensions & Weight
Weight: Up to 50 kg max
Frequently Asked Questions: ASME B16.5 Class 150 Blind Flange Dimensions & Weight
A blind flange has no central bore and is bolted to the end of a line or valve to terminate fluid flow, allowing maintenance access or future piping expansion.