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Dimensions of Class 300 Female Ring-Joint Facing Figure-8 Blanks
Class 300 Female Ring-Joint Facing Figure-8 blanks are specially designed components used to close off or isolate sections of piping systems. These blanks are typically used with Class 300 Ring-Joint (RJ) flanges, which are commonly found in medium-to-high pressure systems (up to 300 psi). The Figure-8 blank design ensures a tight, reliable seal when installed into the female ring-joint facing of the flange.
The Figure-8 shape of these blanks is designed to provide an efficient, strong seal under high pressure conditions. They are widely used in industries such as oil and gas, chemical processing, and power generation, where ensuring a secure seal is critical for maintaining system integrity and preventing leakage during maintenance or shutdowns.
Dimensions of Class 300 Female Ring-Joint Facing Figure-8 Blanks:
Dimensions of Class 300 Female Ring Joint Facing Figure 8 Blanks
| NPS | Inside Diameter,B,mm(in.) | Outside Diameter,O,mm(in.) | Centerline Dimension,A,mm(in.) | Thickness,t,mm(in.) | Web Width,W,mm(in.) |
| ½ | 21 (0.84) | 51 (2.00) | 65 (2.62) | 15.7 (0.62) | 38 (1.50) |
| ¾ | 27 (1.05) | 64 (2.50) | 80 (3.25) | 19.1 (0.75) | 45 (1.75) |
| 1 | 34 (1.32) | 70 (2.75) | 90 (3.50) | 19.1 (0.75) | 51 (2.00) |
| 1¼ | 42 (1.66) | 79 (3.12) | 100 (3.88) | 22.4 (0.88) | 51 (2.00) |
| 1½ | 48 (1.90) | 90 (3.56) | 115 (4.50) | 22.4 (0.88) | 57 (2.25) |
| 2 | 61 (2.38) | 108 (4.25) | 125 (5.00) | 25.4 (1.00) | 57 (2.25) |
| 2½ | 73 (2.88) | 127 (5.00) | 150 (5.88) | 28.4 (1.12) | 57 (2.25) |
| 3 | 89 (3.50) | 146 (5.75) | 170 (6.62) | 28.4 (1.12) | 57 (2.25) |
| 3½ | 102 (4.00) | 159 (6.25) | 185 (7.25) | 28.4 (1.12) | 64 (2.50) |
| 4 | 114 (4.50) | 175 (6.88) | 200 (7.88) | 31.8 (1.25) | 64 (2.50) |
| 5 | 141 (5.56) | 210 (8.25) | 235 (9.25) | 35.1 (1.38) | 70 (2.75) |
| 6 | 168 (6.62) | 241 (9.50) | 270 (10.62) | 35.1 (1.38) | 83 (3.25) |
| 8 | 219 (8.62) | 302 (11.88) | 330 (13.00) | 41.1 (1.62) | 95 (3.75) |
| 10 | 273 (10.75) | 356 (14.00) | 385 (15.25) | 44.5 (1.75) | 102 (4.00) |
| 12 | 324 (12.75) | 413 (16.25) | 450 (17.75) | 50.8 (2.00) | 121 (4.75) |
| 14 | 356 (14.00) | 457 (18.00) | 515 (20.25) | 53.8 (2.12) | 127 (5.00) |
| 16 | 406 (16.00) | 508 (20.00) | 570 (22.50) | 57.2 (2.25) | 127 (5.00) |
| 18 | 457 (18.00) | 575 (22.62) | 630 (24.75) | 60.5 (2.38) | 127 (5.00) |
| 20 | 508 (20.00) | 635 (23.50) | 685 (27.00) | 69.9 (2.75) | 127 (5.00) |
| 24 | 610 (24.00) | 749 (29.50) | 810 (32.00) | 79.2 (3.12) | 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)Female ring-joint groove dimensions shall be in accordance with ASME B16.5
(3)The thickness of the web (or tie bar)dimension,Wt shall be as determined by para.4.1.
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
Key Features of Class 300 Female Ring-Joint Facing Figure-8 Blanks:
Shape: The Figure-8 shape provides a more reliable seal compared to traditional flat or circular blanks. This design allows for a better match with the groove profiles of Ring-Joint flanges, ensuring no leakage under pressure.
Material: These blanks are typically made from carbon steel, stainless steel, or other alloy materials depending on the specific application and pressure requirements.
The material is selected for its ability to withstand high pressures, high temperatures, and corrosion resistance when used in demanding industrial environments.
Sealing Capability: Designed specifically for Class 300 pressure-rated systems, they offer a reliable and secure seal for pipelines operating at pressures up to 300 psi. They are engineered to ensure no leakage when isolated sections of the pipeline are closed off.
Applications:
- Pipeline Isolation: Used to isolate sections of pipelines during repairs, inspections, or maintenance operations.
- High-Pressure Systems: Commonly found in oil & gas, chemical processing, petrochemical, and power generation systems.
- Shutdowns and Emergency Stops: Ideal for temporary shutdowns where a leak-proof closure is required to prevent fluid or gas flow.
- Pressure Containment: Helps contain pressure within specific sections of a pipeline while maintenance is being performed elsewhere.
Compatibility: Designed to fit the female facing of Class 300 Ring-Joint (RJ) flanges. These blanks have a precisely designed shape that ensures a tight seal when installed into the flange’s ring-joint groove.
Bolt Hole Alignment: The blank has bolt holes aligned with the flange’s bolt circle, ensuring secure attachment. These bolt holes are designed to accommodate bolts of appropriate sizes for Class 300 flanges, ensuring a secure fit.
Advantages of Using Class 300 Female Ring-Joint Facing Figure-8 Blanks:
- Leak-Proof: The design of the blank ensures a strong, tight seal when used with Class 300 flanges, minimizing the risk of leaks in high-pressure systems.
- Durability: Made from high-quality materials, these blanks are durable and resistant to the wear and tear associated with high-pressure applications.
- Efficient Isolation: Ideal for isolating sections of a pipeline, ensuring that maintenance, testing, or repairs can be conducted without affecting other parts of the system.
- Versatility: Suitable for a variety of industries, including oil and gas, chemical processing, petrochemical, power generation, and other industries requiring reliable pipeline isolation.
- Cost-Effective: Using Figure-8 blanks for isolating pipe sections can be a more cost-effective and reliable solution compared to using other types of blanks or isolation methods.
Class 300 Female Ring-Joint Facing Figure-8 blanks are critical components in high-pressure piping systems. Their unique Figure-8 design ensures a reliable, leak-proof seal when used with Class 300 Ring-Joint flanges. They are ideal for a range of applications that require secure pipeline isolation under medium-to-high pressure conditions, making them essential for industries such as oil & gas, chemical processing, and power generation.
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. Email:sales@haihaogroup.com