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Dimensions of Class 1500 Blanks for Use With Raised Face Flanges
Class 1500 blanks are designed for high-pressure applications, typically used in conjunction with raised face (RF) flanges. These Class 1500 blanks conform to the ASME B16.48 standard, ensuring their dimensions and performance meet rigorous industrial requirements. These blanks are crucial components in isolating pipeline sections, regulating flow, and maintaining system integrity under high-pressure conditions.
Dimensions of Class 1500 Blanks for Use With Raised Face Flanges：
Dimensions of Class 1500 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) | 60 (2.38) | 80 (3.25) | 6.4 (0.25) | 38 (1.50) |
| ¾ | 21 (0.82) | 67 (2.62) | 90 (3.50) | 9.7 (0.38) | 41 (1.62) |
| 1 | 27 (1.05) | 76 (3.00) | 100 (4.00) | 9.7 (0.38) | 64(2.20) |
| 1¼ | 35 (1.38) | 86 (3.38) | 110 (4.38) | 9.7 (0.38) | 64 (2.50) |
| 1½ | 41 (1.61) | 95 (3.75) | 125 (4.88) | 12.7 (0.50) | 70 (2.75) |
| 2 | 53 (2.07) | 140 (5.50) | 165 (6.50) | 12.7 (0.50) | 70 (2.75) |
| 2½ | 63 (2.47) | 162 (6.38) | 190 (7.50) | 15.7 (0.62) | 76 (3.00) |
| 3 | 78 (3.07) | 172 (6.75) | 205 (8.00) | 19.1 (0.75) | 76 (3.00) |
| 4 | 102 (4.03) | 206 (8.12) | 240 (9.50) | 22.4 (0.88) | 89 (3.50) |
| 5 | 128 (5.05) | 251 (9.88) | 290 (11.50) | 28.4 (1.12) | 89 (3.50) |
| 6 | 154 (6.06) | 279 (11.00) | 320 (12.50) | 35.1 (1.38) | 89 (3.50) |
| 8 | 203 (7.98) | 349 (13.75) | 395 (15.50) | 41.1 (1.62) | 102 (4.00) |
| 10 | 255 (10.02) | 432 (17.00) | 480(19.00) | 50.8 (2.00) | 114 (4.50) |
| 12 | 303 (11.94) | 518 (20.38) | 570 (22.50) | 60.5 (2.38) | 114 (4.50) |
| 14 | 333 (13.12) | 575 (22.62) | 635 (25.00) | 66.5 (2.62) | 127 (5.00) |
| 16 | 381 (15.00) | 638 (25.12) | 705 (27.75) | 76.2 (3.00) | 133 (5.25) |
| 18 | 429 (16.88) | 702 (27.62) | 775 (30.50) | 85.9 (3.38) | 146 (5.75) |
| 20 | 478 (18.81) | 752 (29.62) | 830 (32.75) | 95.3 (3.75) | 152 (6.00) |
| 24 | 575 (22.62) | 899 (35.38) | 990 (39.00) | 111.3 (4.38) | 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)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
Applications of Class 1500 Blanks
- Pipeline Isolation:
Blanks are often used to isolate specific sections of a pipeline during maintenance, inspection, or testing. They provide a safe and secure method for shutting off flow to certain parts of the system without having to disassemble the piping. - Flow Control:
Spectacle blinds (a type of blank) and spades allow for controlled flow regulation by alternating between an open spade and a closed spectacle blind. This flexibility is essential in managing operational flow within high-pressure systems. - High-Pressure Resistance:
Class 1500 blanks are capable of handling the high-pressure requirements of systems where operational pressures exceed those of Class 150 or Class 300 flanges. They are ideal for use in critical, high-pressure pipelines found in industries dealing with hazardous fluids or gases.
Material Options:
Class 1500 blanks are typically manufactured from a range of materials depending on the application. Common materials include:
- Carbon Steel (e.g., ASTM A105, ASTM A516)
- Stainless Steel (e.g., ASTM A182 F304, F316)
- Alloy Steel (e.g., ASTM A182 F11, F22)
- Exotic Alloys for highly corrosive or high-temperature environments (e.g., Hastelloy, Inconel)
Testing and Certification
Given the critical nature of Class 1500 blanks in high-pressure systems, they undergo a series of tests to ensure their strength and integrity:
- Chemical Composition Report: Verifies the material composition to ensure it meets required specifications.
- Tensile and Hardness Tests: To determine the mechanical properties and performance of the material under stress.
- PMI (Positive Material Identification): To ensure that the correct material is used.
- Impact Testing: Ensures that the blank can withstand impact and sudden pressure changes without failure.
- Corrosion Testing (e.g., ASTM G48A): Evaluates resistance to corrosion in harsh environments.
- EN 10204 3.1 Certificate: Provides traceability and documentation to ensure product compliance.
These blanks can also be certified for NACE MR0175/ISO 15156 compliance for sour service applications, ensuring they are resistant to corrosion caused by hydrogen sulfide (H2S) in petroleum and natural gas environments.
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