ASME B16.5 Class 150 Lap Joint 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 Lap Joint Flanges slide freely along the pipe and back up a stub end fitting. Drop forged in Rajkot up to 50 kg per piece for systems requiring frequent dismantling or quick bolt hole alignment.
ASME B16.5 Class 150 Lap Joint 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) |
| 1" | DN25 | 108 mm | 14.3 mm | 79.5 mm | 4 | 16 mm | 1.4 kg✔ (≤50kg) |
| 2" | DN50 | 152 mm | 19.1 mm | 120.5 mm | 4 | 19 mm | 3.5 kg✔ (≤50kg) |
| 3" | DN80 | 190 mm | 23.9 mm | 152.5 mm | 4 | 19 mm | 6.2 kg✔ (≤50kg) |
| 4" | DN100 | 229 mm | 23.9 mm | 190.5 mm | 8 | 19 mm | 9 kg✔ (≤50kg) |
| 6" | DN150 | 279 mm | 25.4 mm | 241.5 mm | 8 | 22 mm | 15 kg✔ (≤50kg) |
| 8" | DN200 | 343 mm | 28.6 mm | 298.5 mm | 8 | 22 mm | 22 kg✔ (≤50kg) |
| 10" | DN250 | 406 mm | 30.2 mm | 362 mm | 12 | 25 mm | 33 kg✔ (≤50kg) |
| 12" | DN300 | 483 mm | 31.8 mm | 432 mm | 12 | 25 mm | 46 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.
- A350 LF2 — 100% heat batch tracked with full chemical and mechanical certification.
Primary Engineering Applications
- Stainless Piping with Carbon Steel Backing Flanges
- Pharmaceutical Sanitary Loops
- Desalination Brine Systems
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 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
Frequently Asked Questions: ASME B16.5 Class 150 Lap Joint Flange Dimensions & Weight
In stainless steel or titanium piping, a low-cost carbon steel A105 lap joint backing flange can be paired with an expensive alloy stub end, slashing material costs by 40%.