ANSI / ASME B16.5 Class 1500 Blind Flange Dimensions
The ANSI/ASME B16.5 Class 1500 Blind Flange is a type of blind flange that complies with the ANSI/ASME B16.5 standard and is suitable for Class 1500 pressure ratings.
ANSI / ASME B16.5 Class 1500 Blind Flange
Class 1500 Blind Flange Dimensions in Inch/lbs
Class 1500 Blind Flange Dimensions in mm/kg
Class 1500 Blind Flange Dimensions in Inch/lbs
| Nominal Pipe Size | Outside Diameter(O) | Thickness (T) | Raised Face Diameter(R) | Approximate Weight (lbs) | Bolt Circle (C) | Number of Holes | Diameter of Holes |
| 1/2 | 4.75 | 0.88 | 1.38 | 4 | 3.25 | 4 | 0.88 |
| 3/4 | 5.13 | 1.00 | 1.69 | 6 | 3.50 | 4 | 0.88 |
| 1 | 5.88 | 1.13 | 2.00 | 8 | 4.00 | 4 | 1.00 |
| 1 1/4 | 6.25 | 1.13 | 2.50 | 9 | 4.38 | 4 | 1.00 |
| 1 1/2 | 7.00 | 1.25 | 2.88 | 13 | 4.88 | 4 | 1.13 |
| 2 | 8.50 | 1.50 | 3.63 | 25 | 6.50 | 8 | 1.00 |
| 2 1/2 | 9.63 | 1.63 | 4.13 | 35 | 7.50 | 8 | 1.13 |
| 3 | 10.50 | 1.88 | 5.00 | 48 | 8.00 | 8 | 1.25 |
| 4 | 12.25 | 2.13 | 6.19 | 73 | 9.50 | 8 | 1.38 |
| 5 | 14.75 | 2.88 | 7.31 | 140 | 11.50 | 8 | 1.63 |
| 6 | 15.50 | 3.25 | 8.50 | 160 | 12.50 | 12 | 1.50 |
| 8 | 19.00 | 3.63 | 10.63 | 300 | 15.50 | 12 | 1.75 |
| 10 | 23.00 | 4.25 | 12.75 | 510 | 19.00 | 12 | 2.00 |
| 12 | 26.50 | 4.88 | 15.00 | 690 | 22.50 | 16 | 2.13 |
| 14 | 29.50 | 5.25 | 16.25 | 975 | 25.00 | 16 | 2.38 |
| 16 | 32.50 | 5.75 | 18.50 | 1300 | 27.75 | 16 | 2.63 |
| 18 | 36.00 | 6.38 | 21.00 | 1750 | 30.50 | 16 | 2.88 |
| 20 | 38.75 | 7.00 | 23.00 | 2225 | 32.75 | 16 | 3.13 |
| 24 | 46.00 | 8.00 | 27.25 | 3625 | 39.00 | 16 | 3.63 |
Class 1500 Blind Flange Dimensions in mm/kg
| Nominal Pipe Size | Outside Diameter(O) | Thickness (T) | Raised Face Diameter(R) | Approximate Weight (Kg) | Bolt Circle (C) | Number of Holes | Diameter of Holes |
| 1/2 | 120.65 | 22.35 | 35.05 | 1.81 | 82.55 | 4 | 22.35 |
| 3/4 | 130.30 | 25.40 | 42.93 | 2.72 | 88.90 | 4 | 22.35 |
| 1 | 149.35 | 28.70 | 50.80 | 3.63 | 101.60 | 4 | 25.40 |
| 1 1/4 | 158.75 | 28.70 | 63.50 | 4.08 | 111.25 | 4 | 25.40 |
| 1 1/2 | 177.80 | 31.75 | 73.15 | 5.90 | 123.95 | 4 | 28.70 |
| 2 | 215.90 | 38.10 | 92.20 | 11.34 | 165.10 | 8 | 25.40 |
| 2 1/2 | 244.60 | 41.40 | 104.90 | 15.88 | 190.50 | 8 | 28.70 |
| 3 | 266.70 | 47.75 | 127.00 | 21.77 | 203.20 | 8 | 31.75 |
| 4 | 311.15 | 54.10 | 157.23 | 33.11 | 241.30 | 8 | 35.05 |
| 5 | 374.65 | 73.15 | 185.67 | 63.50 | 292.10 | 8 | 41.40 |
| 6 | 393.70 | 82.55 | 215.90 | 72.57 | 317.50 | 12 | 38.10 |
| 8 | 482.60 | 92.20 | 270.00 | 136.08 | 393.70 | 12 | 44.45 |
| 10 | 584.20 | 107.95 | 323.85 | 231.33 | 482.60 | 12 | 50.80 |
| 12 | 673.10 | 123.95 | 381.00 | 312.98 | 571.50 | 16 | 54.10 |
| 14 | 749.30 | 133.35 | 412.75 | 442.25 | 635.00 | 16 | 60.45 |
| 16 | 825.50 | 146.05 | 469.90 | 589.67 | 704.85 | 16 | 66.80 |
| 18 | 914.40 | 162.05 | 533.40 | 793.79 | 774.70 | 16 | 73.15 |
| 20 | 984.25 | 177.80 | 584.20 | 1009.24 | 831.85 | 16 | 79.50 |
| 24 | 1168.40 | 203.20 | 692.15 | 1644.27 | 990.60 | 16 | 92.20 |
Features of Class 1500 Blind Flanges
- Standard: ANSI / ASME B16.5
- Pressure Rating: Class 1500, suitable for high-pressure environments
- Purpose: Primarily used to seal pipeline ends, valve openings, or vessel openings to prevent fluid leakage
- Materials: Common materials include carbon steel, stainless steel, alloy steel, etc., selected based on the application requirements.
Class 1500 Blind Flanges Applications
- High-pressure pipeline systems
- Oil and gas extraction, chemical, and petrochemical industries
- Pressure vessels and pipeline systems that require high sealing integrity
ANSI / ASME B16.5 Class 1500 Blind Flange, due to its high-pressure tolerance, is commonly used in industries with stringent requirements.
For more technical support, please contact SSM.
FAQ
The right dimensions depend on:
- Nominal Pipe Size (NPS)
- Pressure Rating (Class 1500)
- Standard Flange Face Type (e.g., Raised Face, Flat Face)
You can refer to the ANSI / ASME B16.5 standard or consult manufacturers’ dimension charts for detailed specifications based on NPS and pressure class.
In addition to ANSI / ASME B16.5, other relevant standards include:
- ASME B31.3 for Process Piping
- ASME BPVC Section VIII for Pressure Vessels
- API 6A for Equipment Used in Oil and Gas Drilling
EN 
DE 
RU 
FA 
ID 
ES 
FR 
NL