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Dimensions of Class 2500 Blanks for Use With Raised Face Flanges
Class 2500 blanks are a type of flange accessory designed to fit with raised face flanges, typically in high-pressure applications. The dimensions of Class 2500 blanks for use with raised face flanges are designed to align with the flange standards and ensure proper sealing and pressure containment. These blanks, also known as spectacle blinds, come in a range of sizes, usually based on the nominal pipe size (NPS) and corresponding flange dimensions.
Dimensions of Class 2500 Blanks for Use With Raised Face Flanges:
Dimensions of Class 2500 Blanks for Use With Raised Face Flanges
| 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 | 16 (0.62) | 67 (2.62) | 90 (3.50) | 9.7 (0.38) | 38 (1.50) |
| ¾ | 21 (0.82) | 73 (2.88) | 95 (3.75) | 9.7 (0.38) | 41 (1.62) |
| 1 | 27 (1.05) | 83 (3.35) | 110 (4.25) | 9.7 (0.38) | 64(2.50) |
| 1¼ | 35 (1.38) | 102 (4.00) | 130 (5.12) | 12.7 (0.50) | 64 (2.50) |
| 1½ | 41 (1.61) | 114 (4.50) | 145 (5.75) | 15.7 (0.62) | 70 (2.75) |
| 2 | 53 (2.07) | 143 (5.62) | 170 (6.75) | 15.7 (0.62) | 70 (2.75) |
| 2½ | 63 (2.47) | 165 (6.50) | 195 (7.75) | 19.1 (0.75) | 76 (3.00) |
| 3 | 78 (3.07) | 194 (7.62) | 230 (9.00) | 22.4 (0.88) | 76 (3.00) |
| 4 | 102 (4.03) | 232 (9.12) | 275 (10.75) | 28.4 (1.12) | 89 (3.50) |
| 5 | 128 (5.05) | 276 (10.88) | 325 (12.75) | 35.1 (1.38) | 89 (3.50) |
| 6 | 154 (6.06) | 314 (12.38) | 370 (14.50) | 41.1 (1.62) | 89 (3.50) |
| 8 | 198 (7.81) | 384 (15.12) | 440 (17.25) | 53.8 (2.12) | 102 (4.00) |
| 10 | 248 (9.75) | 473 (18.62) | 540(21.25) | 66.5 (2.62) | 114 (4.50) |
| 12 | 289 (11.37) | 546 (21.50) | 620 (24.38) | 79.2 (3.12) | 114 (4.50) |
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)Optional raised face.Refer to para.4.3.1.
(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:
Material Options:
- These blanks are usually made from materials such as carbon steel, stainless steel, or alloy steel, depending on the pressure and temperature requirements of the specific system.
- Common materials include A105 (carbon steel), A182 F304 (stainless steel), and other ASTM and ASME-compliant alloys.
Pressure Class:
- Class 2500 refers to the pressure rating of the flange, which indicates that the flange can withstand high pressures, typically in the range of 2500 psi.
- These blanks are designed to match the high-pressure specifications of Class 2500 raised face flanges, ensuring optimal sealing and performance in demanding environments.
Dimensions:
- Blanks come in various sizes, matching the dimensions of the corresponding raised face flanges.
- Common dimensions for Class 2500 blanks are based on standard flange sizes such as 1/2″ to 12″ in diameter.
Design:
- Raised Face: The raised face design is standard for high-pressure applications and ensures a tight seal when bolted to the flange.
- Thickness: Blanks are typically thicker than standard flange gaskets or spacers to handle the high-pressure requirements of Class 2500 systems.
Applications:
- Used primarily in industries like oil and gas, chemical processing, power generation, and petrochemical, where high-pressure lines require isolation or maintenance.
- Pipeline shutdowns, maintenance procedures, and temporary isolation of pipelines often involve the use of Class 2500 blanks.
Inspection & Quality:
- These blanks undergo stringent quality control checks, including visual inspection, dimensional checks, and pressure testing to ensure they meet the required standards.
- They are often certified according to ASME or API standards for material, pressure class, and durability.
Installation:
- Installation is straightforward, with the blank being positioned between two raised face flanges and bolted into place.
- A proper sealing gasket or O-ring may be used to ensure no leakage between the blank and the flange faces.
Benefits:
- High Pressure Capacity: The Class 2500 rating makes these blanks suitable for high-pressure systems.
- Ease of Maintenance: They allow easy isolation of parts of the pipeline, reducing downtime during maintenance or repairs.
- Corrosion Resistance: High-quality materials ensure a long lifespan, even in harsh environments.
These blanks provide a reliable solution for maintaining the integrity of high-pressure systems while ensuring safety during shutdowns or pipeline isolation tasks.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