Dimensions of Class 1500 Female Ring-Joint Facing Figure-8 Blanks
Class 1500 Female Ring-Joint Facing Figure-8 Blanks are specialized components used in high-pressure pipeline systems, typically for sealing purposes in conjunction with flanges. These blanks feature a Ring-Joint facing and are designed to provide a tight, leak-proof seal, making them suitable for critical applications in industries such as oil and gas, chemical processing, and power generation.
Dimensions of Class 1500 Female Ring-Joint Facing Figure-8 Blanks:

Dimensions of Class 1500 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) | 61 (2.38) | 80 (3.25) | 22.4(0.88) | 38 (1.50) |
¾ | 27 (1.05) | 67 (2.62) | 90 (3.50) | 25.4 (1.00) | 45 (1.75) |
1 | 34 (1.32) | 71 (2.81) | 100 (4.00) | 25.4 (1.00) | 54 (2.12) |
1¼ | 42 (1.66) | 81 (3.19) | 110 (4.38) | 25.4 (1.00) | 54 (2.12) |
1½ | 48 (1.90) | 92 (3.62) | 125 (4.88) | 28.4 (1.12) | 57 (2.25) |
2 | 61 (2.38) | 124 (4.88) | 165 (6.50) | 35.1 (1.38) | 54 (2.12) |
2½ | 73 (2.88) | 137 (5.38) | 190 (7.50) | 38.1 (1.50) | 57 (2.25) |
3 | 89 (3.50) | 168 (6.62) | 205 (8.00) | 44.5 (1.75) | 73 (2.88) |
4 | 114 (4.50) | 194 (7.62) | 240 (9.50) | 47.8 (1.88) | 76 (3.00) |
5 | 141 (5.56) | 229 (9.00) | 290 (11.50) | 53.8 (2.12) | 76 (3.00) |
6 | 168 (6.62) | 248 (9.75) | 315 (12.50) | 60.5 (2.38) | 79 (3.12) |
8 | 219 (8.62) | 318 (12.50) | 395 (15.50) | 73.2 (2.88) | 86 (3.38) |
10 | 273 (10.75) | 371 (14.62) | 480 (19.00) | 82.5 (3.25) | 133 (5.25) |
12 | 324 (12.75) | 438 (17.25) | 570 (22.50) | 101.6 (4.00) | 133 (5.25) |
14 | 356 (14.00) | 489 (19.25) | 635 (25.00) | 111.3 (4.38) | 140 (5.50) |
16 | 406 (16.00) | 546(21.50) | 705 (27.75) | 124.0 (4.88) | 146 (5.75) |
18 | 457 (18.00) | 613 (24.12) | 775 (30.50) | 133.0 (5.25) | 152 (6.00) |
20 | 508 (20.00) | 673 (26.50) | 830 (32.75) | 142.7 (5.62) | 165 (6.50) |
24 | 610 (24.00) | 794 (31.25) | 990 (39.00) | 168.1 (6.62) | 178 (7.00) |
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
Materials and Construction
Class 1500 Female Ring-Joint Facing Figure-8 Blanks are typically made from high-strength, corrosion-resistant materials that ensure their performance in demanding environments. Common materials used include:
- Carbon Steel: Often used for general-purpose applications, offering a balance of strength, durability, and cost-effectiveness. It is suitable for use in moderate pressure systems or non-corrosive environments.
- Stainless Steel: More commonly chosen for its resistance to corrosion and high-temperature properties. Stainless steel blanks are ideal for applications involving corrosive fluids or gases, as well as those subjected to high-temperature conditions.
- Alloy Steel: Alloy steels with higher strength and resistance to thermal and mechanical stresses may be used for the most extreme environments, such as those found in high-pressure steam systems or petrochemical refineries.
Applications of Class 1500 Female Ring-Joint Facing Figure-8 Blanks
These blanks are widely used across industries where safety and performance under high pressure are critical. Some of the typical applications include:
Oil and Gas Industry:
Sealing off pipeline systems: During maintenance, repairs, or when isolating parts of a pipeline, these blanks provide a secure closure to prevent leaks of hazardous substances.
Exploration and production: In offshore drilling platforms or oil rigs, where pipelines are exposed to harsh conditions, Class 1500 Female Ring-Joint Facing Figure-8 Blanks ensure that pressure systems remain sealed and operational.
Chemical Processing:
High-temperature reactors and pressurized vessels in chemical plants often require reliable sealing components to isolate specific sections of pipelines during maintenance or while switching out gaskets. The female ring-joint design ensures that these sections remain safe from leaks.
Power Generation:
Steam piping systems: In power plants, steam pipes are often under extreme pressure and temperature. Ring-joint facing blanks ensure that the flange joints remain secure, preventing leaks and ensuring the safe operation of the plant.
High-pressure gas systems: Similar to steam, high-pressure gas systems used in turbines and compressors rely on leak-proof connections, making these blanks essential for performance.
Refining and Petrochemical:
In refineries, where pipelines may carry flammable, toxic, or corrosive substances, these blanks are essential for sealing off sections during maintenance or when modifying the piping layout. Figure-8 blanks also offer enhanced sealing and stress resistance, which is vital when working with volatile materials.
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