Dimensions of Class 150 Male Ring-Joint Facing Figure-8 Blanks
The Class 150 Male Ring-Joint Facing Figure-8 Blanks are precision-engineered components designed for use in high-pressure piping systems. These figure-8 blanks, often referred to as spectacle blinds, serve as essential tools for isolating or shutting off sections of pipelines during maintenance, inspection, or operational adjustments.
Dimensions of Class 150 Male Ring-Joint Facing Figure-8 Blanks

Dimensions of Class 150 Male Ring Joint Facing Figure-8 Blanks
NPS | Inside Diameter,B,mm(in.) | Centerline Dimension,A,mm(in.) | Thickness,t,mm(in.) | Web Width,W,mm(in.) |
1 | 34 (1.32) | 80 (3.12) | 6.4 (0.25) | 51 (2.00) |
1¼ | 42 (1.66) | 90 (3.50) | 6.4 (0.25) | 51 (2.00) |
1½ | 48 (1.90) | 100 (3.88) | 6.4 (0.25) | 57 (2.25) |
2 | 61 (2.38) | 120 (4.75) | 6.4 (0.25) | 57 (2.25) |
2½ | 73 (2.88) | 140 (5.50) | 9.7 (0.38) | 57 (2.25) |
3 | 89 (3.50) | 150 (6.00) | 9.7 (0.38) | 57 (2.25) |
3½ | 102 (4.00) | 175 (7.00) | 9.7 (0.38) | 64 (2.50) |
4 | 114 (4.50) | 190 (7.50) | 9.7 (0.38) | 64 (2.50) |
5 | 141 (5.56) | 215 (8.50) | 12.7 (0.50) | 76 (3.00) |
6 | 168 (6.62) | 240 (9.50) | 12.7 (0.50) | 83 (3.25) |
8 | 219 (8.62) | 300 (11.75) | 15.7 (0.62) | 95 (3.75) |
10 | 273 (10.75) | 362 (14.25) | 19.1 (0.75) | 102 (4.00) |
12 | 324 (12.75) | 432 (17.00) | 22.4 (0.88) | 121 (4.75) |
14 | 356 (14.00) | 476 (18.75) | 22.4 (0.88) | 127 (5.00) |
16 | 406 (16.00) | 540 (21.25) | 25.4 (1.00) | 127 (5.00) |
18 | 457 (18.00) | 578 (22.75) | 28.4 (1.12) | 127 (5.00) |
20 | 508 (20.00) | 635 (25.00) | 28.4 (1.12) | 127 (5.00) |
24 | 610 (24.00) | 749 (29.50) | 35.1 (1.38) | 152 (6.00) |
NOTES:
(1)Hole size (where required due to bolt spacing)shall be the same as the flange bolt hole and located such that it will not interfere with bolting between two flanges.
(2)Oval or octagonal ring shapes may be provided;only the oval ring is illustrated for simplicity.Ring dimensions shall be in accordance with ASME B16.20,except Th=T+t,where T is the ring height specified in ASME B16.20.
Haihao Group can provide a variety ASME B16.48 standard flange,as follows:
- Dimensions of Class 150 Blanks for Use With Raised Face Flanges
- Dimensions of Class 300 Blanks for Use With Raised Face Flanges
- Dimensions of Class 600 Blanks for Use With Raised Face Flanges
- Dimensions of Class 900 Blanks for Use With Raised Face Flanges
- Dimensions of Class 1500 Blanks for Use With Raised Face Flanges
- Dimensions of Class 2500 Blanks for Use With Raised Face Flanges
- Dimensions of Class 150 Female Ring-Joint Facing Figure-8 Blanks
- Dimensions of Class 300 Female Ring-Joint Facing Figure-8 Blanks
- Dimensions of Class 600 Female Ring-Joint Facing Figure-8 Blanks
- Dimensions of Class 900 Female Ring-Joint Facing Figure-8 Blanks
- Dimensions of Class 1500 Female Ring-Joint Facing Figure-8 Blanks
- Dimensions of Class 2500 Female Ring-Joint Facing Figure-8 Blanks
- Dimensions of Class 150 Male Ring-Joint Facing Figure-8 Blanks
- Dimensions of Class 300 Male Ring-Joint Facing Figure-8 Blanks
- Dimensions of Class 600 Male Ring-Joint Facing Figure-8 Blanks
- Dimensions of Class 900 Male Ring-Joint Facing Figure-8 Blanks
- Dimensions of Class 1500 Male Ring-Joint Facing Figure-8 Blanks
- Dimensions of Class 2500 Male Ring-Joint Facing Figure-8 Blanks
Design and Features
- Material: Manufactured using premium-grade materials, such as carbon steel, stainless steel, or alloy steel, to ensure durability and resistance to extreme pressures and temperatures.
- Facing Type: The Male Ring-Joint Facing (RTJ) design provides a secure and leak-proof seal by utilizing metal-to-metal contact. This design is particularly suitable for critical applications where joint integrity is paramount.
- Pressure Class: Rated for Class 150, these blanks are ideal for systems operating at moderate pressure ranges.
- Dimensions: The figure-8 blanks conform to industry standards, ensuring compatibility with a wide range of flanges and pipeline setups.
- Corrosion Protection: Optional coatings, such as anti-corrosion paint or galvanization, can be applied to enhance resistance to environmental factors.
Applications
Class 150 Male RTJ Figure-8 Blanks are widely used in industries requiring high-performance piping solutions, including:
- Oil and Gas: For isolating sections of pipelines in exploration, refining, and distribution operations.
- Petrochemical: Ensuring safe operation of complex processing systems.
- Power Generation: Used in steam and cooling water systems.
- Marine Engineering: Supporting shipbuilding and offshore installations.
Advantages
- Durability: Built to withstand high-pressure and high-temperature conditions.
- Versatility: Compatible with a range of piping configurations and flange types.
- Reliability: Provides a dependable sealing solution for critical operations.
- Ease of Use: The figure-8 design allows for quick and efficient switching between open and closed states.
Customization Options
Hebei Haihao Group offers customization services to meet specific customer requirements:
- Material Selection: A variety of material grades tailored to project needs.
- Coatings: Anti-corrosion or specialized coatings for extended service life.
- Dimensions: Custom sizes and thicknesses available upon request.
Your Trusted Supplier for Piping Solutions
As an industry leader in flange and pipe fitting manufacturing, Hebei Haihao Group delivers high-quality Class 150 Male Ring-Joint Facing Figure-8 Blanks and other piping components. With a focus on precision engineering and customer satisfaction, we provide reliable products for global projects in oil and gas, petrochemical, and marine industries.For detailed project requirements or precise dimensions for a specific application, it’s recommended to consult the ASME B16.48 standard or contact professional supplier like Haihao Group.
Contact us today to discuss your requirements and explore our extensive product range. Email:sales@haihaogroup.com