ANSI / ASME B16.5 Class 600 Lap Joint Flange Dimensions
Lap Joint flanges are commonly used in low-pressure, non-corrosive medium systems, such as in industries like food processing, pharmaceuticals, and water treatment.
ANSI / ASME B16.5 Class 600 Lap Joint Flange
| Nominal Pipe Size | Outside Diameter (O) | Thickness (T) | Length Thru Hub (Y) | Hub Diameter (X) | Radius (r) | Bore (B) | Approximate Weight (lbs) | Bolt Circle (C) | Number of Holes | Diameter of Holes |
| 1/2 | 3.75 | 0.56 | 0.88 | 1.50 | 0.13 | 0.90 | 2 | 2.63 | 4 | 0.63 |
| 3/4 | 4.63 | 0.63 | 1.00 | 1.88 | 0.13 | 1.11 | 3 | 3.25 | 4 | 0.75 |
| 1 | 4.88 | 0.69 | 1.06 | 2.13 | 0.13 | 1.38 | 4 | 3.50 | 4 | 0.75 |
| 1 1/4 | 5.25 | 0.81 | 1.13 | 2.50 | 0.19 | 1.72 | 5 | 3.88 | 4 | 0.75 |
| 1 1/2 | 6.13 | 0.88 | 1.25 | 2.75 | 0.25 | 1.97 | 7 | 4.50 | 4 | 0.88 |
| 2 | 6.50 | 1.00 | 1.44 | 3.31 | 0.31 | 2.46 | 9 | 5.00 | 8 | 0.75 |
| 2 1/2 | 7.50 | 1.13 | 1.63 | 3.94 | 0.31 | 2.97 | 12 | 5.88 | 8 | 0.88 |
| 3 | 8.25 | 1.25 | 1.81 | 4.63 | 0.38 | 3.60 | 15 | 6.63 | 8 | 0.88 |
| 3 1/2 | 9.00 | 1.38 | 1.94 | 5.25 | 0.38 | 4.10 | 20 | 7.25 | 8 | 1.00 |
| 4 | 10.75 | 1.50 | 2.13 | 6.00 | 0.44 | 4.60 | 36 | 8.50 | 8 | 1.00 |
| 5 | 13.00 | 1.75 | 2.38 | 7.44 | 0.44 | 5.69 | 61 | 10.50 | 8 | 1.13 |
| 6 | 14.00 | 1.88 | 2.63 | 8.75 | 0.50 | 6.75 | 78 | 11.50 | 12 | 1.13 |
| 8 | 16.50 | 2.19 | 3.00 | 10.75 | 0.50 | 8.75 | 110 | 13.75 | 12 | 1.25 |
| 10 | 20.00 | 2.50 | 4.38 | 13.50 | 0.50 | 10.92 | 170 | 17.00 | 16 | 1.38 |
| 12 | 22.00 | 2.63 | 4.63 | 15.75 | 0.50 | 12.92 | 200 | 19.25 | 20 | 1.38 |
| 14 | 23.75 | 2.75 | 5.00 | 17.00 | 0.50 | 14.18 | 250 | 20.75 | 20 | 1.50 |
| 16 | 27.00 | 3.00 | 5.50 | 19.50 | 0.50 | 16.19 | 365 | 23.75 | 20 | 1.63 |
| 18 | 29.25 | 3.25 | 6.00 | 21.50 | 0.50 | 18.20 | 435 | 25.75 | 20 | 1.75 |
| 20 | 32.00 | 3.50 | 6.50 | 24.00 | 0.50 | 20.25 | 570 | 28.50 | 24 | 1.75 |
| 22 | 34.25 | 3.75 | 6.88 | 26.25 | 0.50 | 22.25 | 670 | 30.63 | 24 | 1.88 |
| 24 | 37.00 | 4.00 | 7.25 | 28.25 | 0.50 | 24.25 | 810 | 33.00 | 24 | 2.00 |
| Nominal Pipe Size | Outside Diameter (O) | Thickness (T) | Length Thru Hub (Y) | Hub Diameter (X) | Radius (r) | Bore (B) | Approximate Weight (lbs) | Bolt Circle (C) | Number of Holes | Diameter of Holes |
| 1/2 | 95.25 | 14.22 | 22.35 | 38.10 | 3.30 | 22.86 | 0.91 | 66.80 | 4 | 16.00 |
| 3/4 | 117.60 | 16.00 | 25.40 | 47.75 | 3.30 | 28.19 | 1.36 | 82.55 | 4 | 19.05 |
| 1 | 123.95 | 17.53 | 26.92 | 54.10 | 3.30 | 35.05 | 1.81 | 88.90 | 4 | 19.05 |
| 1 1/4 | 133.35 | 20.57 | 28.70 | 63.50 | 4.83 | 43.69 | 2.27 | 98.55 | 4 | 19.05 |
| 1 1/2 | 155.70 | 22.35 | 31.75 | 69.85 | 6.35 | 50.04 | 3.18 | 114.30 | 4 | 22.35 |
| 2 | 165.10 | 25.40 | 36.58 | 84.07 | 7.87 | 62.48 | 4.08 | 127.00 | 8 | 19.05 |
| 2 1/2 | 190.50 | 28.70 | 41.40 | 100.08 | 7.87 | 75.44 | 5.44 | 149.35 | 8 | 22.35 |
| 3 | 209.55 | 31.75 | 45.97 | 117.60 | 9.65 | 91.44 | 6.80 | 168.40 | 8 | 22.35 |
| 3 1/2 | 228.60 | 35.05 | 49.28 | 133.35 | 9.65 | 104.14 | 9.07 | 184.15 | 8 | 25.40 |
| 4 | 273.05 | 38.10 | 54.10 | 152.40 | 11.18 | 116.84 | 16.33 | 215.90 | 8 | 25.40 |
| 5 | 330.20 | 44.45 | 60.45 | 188.98 | 11.18 | 144.53 | 27.67 | 266.70 | 8 | 28.70 |
| 6 | 355.60 | 47.75 | 66.80 | 222.25 | 12.70 | 171.45 | 35.38 | 292.10 | 12 | 28.70 |
| 8 | 419.10 | 55.63 | 76.20 | 273.05 | 12.70 | 222.25 | 49.89 | 349.25 | 12 | 31.75 |
| 10 | 508.00 | 63.50 | 111.25 | 342.90 | 12.70 | 277.37 | 77.11 | 431.80 | 16 | 35.05 |
| 12 | 558.80 | 66.80 | 117.60 | 400.05 | 12.70 | 328.17 | 90.72 | 488.95 | 20 | 35.05 |
| 14 | 603.25 | 69.85 | 127.00 | 431.80 | 12.70 | 360.17 | 113.40 | 527.05 | 20 | 38.10 |
| 16 | 685.80 | 76.20 | 139.70 | 495.30 | 12.70 | 411.23 | 165.56 | 603.25 | 20 | 41.40 |
| 18 | 742.95 | 82.55 | 152.40 | 546.10 | 12.70 | 462.28 | 197.31 | 654.05 | 20 | 44.45 |
| 20 | 812.80 | 88.90 | 165.10 | 609.60 | 12.70 | 514.35 | 258.55 | 723.90 | 24 | 44.45 |
| 22 | 869.95 | 95.25 | 174.75 | 666.75 | 12.70 | 565.15 | 303.91 | 778.00 | 24 | 47.75 |
| 24 | 939.80 | 101.60 | 184.15 | 717.55 | 12.70 | 615.95 | 367.41 | 838.20 | 24 | 50.80 |
Key Features
Pressure Rating: Class 600 means the flange can withstand a pressure of 600 pounds per square inch (PSI) at a specific temperature (the pressure capacity may vary with temperature).
Design: The Lap Joint Flange does not directly weld to the pipe. Instead, it is used together with a Stub End, where the flange is slipped over the pipe end and then connected to other equipment or piping. The flange can rotate freely, which simplifies alignment during installation.
Applications: Lap Joint Flanges are mainly used in piping systems that require frequent disassembly and maintenance. They are particularly useful for systems with expensive materials, such as stainless steel or nickel alloys, as only the Stub End is in contact with the fluid, and the flange body can be made of a lower-cost material.
Welding Method: The Stub End is usually butt-welded to the pipe, while the Lap Joint Flange itself is not welded directly.
Usage: They are widely used in industries that require corrosion resistance and high-pressure handling, such as petrochemical, food, and pharmaceutical sectors.
The ANSI / ASME B16.5 Class 600 Lap Joint Flange is a type of flange manufactured according to the ASME B16.5 standard, designed for medium to high-pressure applications (Class 600 indicates the pressure rating). This type of flange is primarily used in conjunction with pipe ends, such as Stub Ends.
For more technical support, please contact SSM.
EN 
DE 
RU 
FA 
ID 
ES 
FR 
NL