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Dimensions of Class 900 Blanks for Use With Raised Face Flanges
The dimensions of Class 900 blanks for use with raised face (RF) flanges are standardized under the ASME B16.48 standard. These components conform to the ASME B16.48 standard, ensuring precise compatibility with raised face (RF) flanges. They play a critical role in isolating, maintaining, or regulating sections of pipelines in industries like oil and gas, petrochemical, power generation, and offshore platforms.Below are the dimensions commonly associated with Class 900 blanks for raised face flanges:
Dimensions of Class 900 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) | 6.4 (0.25) | 41 (1.62) |
| 1 | 27 (1.05) | 76 (3.00) | 100 (4.00) | 6.4 (0.25) | 57 (2.25) |
| 1¼ | 37 (1.44) | 86 (3.38) | 110 (4.38) | 9.7 (0.38) | 57 (2.25) |
| 1½ | 43 (1.68) | 95 (3.75) | 125 (4.88) | 9.7 (0.38) | 67 (2.62) |
| 2 | 55 (2.16) | 140 (5.50) | 165 (6.50) | 12.7 (0.50) | 57 (2.25) |
| 2½ | 67 (2.64) | 162 (6.38) | 190 (7.50) | 12.7 (0.50) | 67 (2.62) |
| 3 | 83 (3.26) | 165 (6.50) | 190 (7.50) | 15.7 (0.62) | 67 (2.62) |
| 4 | 108 (4.26) | 203 (8.00) | 235 (9.25) | 19.1 (0.75) | 76 (3.00) |
| 5 | 135 (5.30) | 244 (9.62) | 280 (11.00) | 22.4 (0.88) | 86 (3.38) |
| 6 | 162 (6.36) | 286 (11.25) | 320 (12.50) | 25.4 (1.00) | 86 (3.38) |
| 8 | 212 (8.33) | 356 (14.00) | 395 (15.50) | 35.1 (1.38) | 95 (3.75) |
| 10 | 265 (10.42) | 432 (17.00) | 470(18.50) | 41.1 (1.62) | 105 (4.12) |
| 12 | 315 (12.39) | 495 (19.50) | 535 (21.00) | 47.8 (1.88) | 105 (4.12) |
| 14 | 346 (13.62) | 518 (20.38) | 560 (22.00) | 53.8 (2.12) | 114 (4.50) |
| 16 | 397 (15.62) | 572 (22.50) | 615 (24.25) | 60.5 (2.38) | 124 (4.88) |
| 18 | 448 (17.62) | 635 (25.00) | 685 (27.00) | 66.5 (2.62) | 133 (5.25) |
| 20 | 497 (19.56) | 696 (27.38) | 750 (29.50) | 73.5 (2.88) | 133 (5.25) |
| 24 | 597 (23.50) | 835 (32.88) | 900 (35.50) | 88.9 (3.50) | 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)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 900 Blanks
Isolation: Temporarily or permanently isolate pipeline sections during maintenance or testing.
Flow Regulation: Control fluid or gas flow by inserting or removing the blank.
Safety: Prevent accidental flow in high-pressure pipelines, safeguarding equipment and personnel.
Key Features of Class 900 Blanks
- High Pressure Resistance: Designed to withstand pressures up to 900#.
- Compatibility: Engineered to fit raised face (RF) flanges for a secure seal.
- Precision Manufacturing: Adheres to ASME B16.48 dimensions for standardization.
- Durability: Made from robust materials to ensure long-term performance in harsh environments.
- Customization Options: Available with additional coatings or treatments for enhanced corrosion resistance.
Materials Used
- Carbon Steel (e.g., ASTM A105, A516)
- Stainless Steel (e.g., ASTM A182 F304, F316)
- Alloy Steel (e.g., ASTM A182 F11, F22)
- Exotic Alloys for corrosive or high-temperature environments.
Testing and Certification
- Chemical Composition Analysis
- Tensile and Hardness Tests
- PMI (Positive Material Identification)
- Impact and Corrosion Tests (e.g., ASTM G48A)
- Certified with EN 10204 3.1 for traceability and compliance with NACE MR0175/ISO 15156.
Class 900 blanks are indispensable in high-pressure applications, offering durability, safety, and precision. Their robust design and adherence to international standards make them a reliable choice for demanding pipeline systems. Whether isolating flow or facilitating maintenance, Class 900 blanks ensure operational excellence.
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