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Dimensions of Class 300 Blanks for Use With Raised Face Flanges
The dimensions of Class 300 blanks for use with raised face (RF) flanges are standardized under the ASME B16.48 standard. These components conform to ASME B16.48 standards and are used to isolate, restrict, or maintain pipeline sections while ensuring compatibility with raised face (RF) flanges. Below are the dimensions commonly associated with Class 300 blanks for raised face flanges:
Dimensions of Class 300 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) | 51 (2.00) | 65 (2.62) | 6.4 (0.25) | 38 (1.50) |
| ¾ | 21 (0.82) | 64 (2.50) | 80 (3.25) | 6.4 (0.25) | 38 (1.50) |
| 1 | 27 (1.05) | 70 (2.75) | 90 (3.50) | 6.4 (0.25) | 38 (1.50) |
| 1¼ | 42 (1.66) | 79 (3.12) | 100 (3.88) | 6.4 (0.25) | 38 (1.50) |
| 1½ | 48 (1.90) | 92 (3.62) | 115 (4.50) | 6.4 (0.25) | 38 (1.50) |
| 2 | 61 (2.38) | 108 (4.25) | 125 (5.00) | 9.7 (0.38) | 51 (2.00) |
| 2½ | 73 (2.88) | 127 (5.00) | 150 (5.88) | 9.7 (0.38) | 51 (2.00) |
| 3 | 89 (3.50) | 146 (5.75) | 170 (6.62) | 9.7 (0.38) | 64 (2.50) |
| 3½ | 102 (4.00) | 162 (6.38) | 185 (7.25) | 12.7 (0.50) | 64 (2.50) |
| 4 | 114 (4.50) | 178 (7.00) | 200 (7.88) | 12.7 (0.50) | 64 (2.50) |
| 5 | 141 (5.56) | 213 (8.38) | 235 (9.25) | 15.7 (0.62) | 76 (3.00) |
| 6 | 168 (6.62) | 248 (9.75) | 270 (10.62) | 15.7 (0.62) | 76 (3.00) |
| 8 | 219 (8.62) | 305 (12.00) | 330 (13.00) | 22.4 (0.88) | 76 (3.00) |
| 10 | 273 (10.75) | 359 (14.12) | 385 (15.25) | 25.4(1.00) | 102 (4.00) |
| 12 | 324 (12.75) | 419 (16.50) | 450 (17.75) | 28.4 (1.12) | 102 (4.00) |
| 14 | 356 (14.00) | 483 (19.00) | 515 (20.25) | 31.8 (1.25) | 108 (4.25) |
| 16 | 406 (16.00) | 536 (21.12) | 570 (22.50) | 38.1 (1.50) | 108 (4.25) |
| 18 | 457 (18.00) | 594 (23.38) | 630 (24.75) | 41.1 (1.62) | 114 (4.50) |
| 20 | 508 (20.00) | 651 (25.62) | 685 (27.00) | 44.5 (1.75) | 121 (4.75) |
| 24 | 610 (24.00) | 772 (30.38) | 810 (32.00) | 50.8 (2.00) | 140 (5.50) |
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
Material Selection
Common materials include carbon steel (ASTM A105), stainless steel (ASTM A182), and alloy steels based on application requirements.
Materials must comply with NACE MR0175/ISO 15156 for corrosive environments.
Key Features
Precision Manufacturing: Ensures a perfect fit with raised face flanges.
Durability: Designed to withstand high pressure and temperature conditions.
Custom Options: Available with various coatings and finishes to enhance corrosion resistance.
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