Flange dimensions and weights to AWWA C228 Class SD standard. Every size we list is one we manufacture and ship, with custom sizes and modifications available on request.
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Select a flange type to view the AWWA C228 Class SD flange dimensions, including outside diameter, inside diameter, bolt circle, number and size of bolt holes, thickness, and weight.
| API Int. Part Number | Size | O.D. | I.D. | Ø B.H.C. | Ø B.H. | # B.H. | THK | Weight Lbs |
|---|---|---|---|---|---|---|---|---|
| SPF0200-D | 2 | 6.00 | 2.44 | 4.75 | 0.750 | 4 | 0.625 | 3.9 |
| SPF0250-D | 2.5 | 7.00 | 2.94 | 5.50 | 0.750 | 4 | 0.625 | 5.3 |
| SPF0300-D | 3 | 7.50 | 3.57 | 6.00 | 0.750 | 4 | 0.625 | 5.7 |
| SPF0400-D | 4 | 9.00 | 4.57 | 7.50 | 0.750 | 8 | 0.625 | 8.1 |
| SPF0500-D | 5 | 10.00 | 5.66 | 8.50 | 0.875 | 8 | 0.625 | 9.1 |
| SPF0600-D | 6 | 11.00 | 6.72 | 9.50 | 0.875 | 8 | 0.688 | 10.7 |
| SPF0800-D | 8 | 13.50 | 8.72 | 11.75 | 0.875 | 8 | 0.688 | 15.7 |
| SPF1000-D | 10 | 16.00 | 10.88 | 14.25 | 1.000 | 12 | 0.688 | 19.3 |
| SPF1200-D | 12 | 19.00 | 12.88 | 17.00 | 1.000 | 12 | 0.812 | 33.9 |
| SPF1400-D | 14 | 21.00 | 14.19 | 18.75 | 1.125 | 12 | 0.938 | 47.3 |
| SPF1600-D | 16 | 23.50 | 16.19 | 21.25 | 1.125 | 16 | 1.000 | 60.8 |
| SPF1800-D | 18 | 25.00 | 18.19 | 22.75 | 1.250 | 16 | 1.062 | 65.2 |
| SPF2000-D | 20 | 27.50 | 20.19 | 25.00 | 1.250 | 20 | 1.125 | 81.2 |
| SPF2200-D | 22 | 29.50 | 22.19 | 27.25 | 1.375 | 20 | 1.188 | 90.8 |
| SPF2400-D | 24 | 32.00 | 24.19 | 29.50 | 1.375 | 20 | 1.250 | 112.0 |
| SPF2600-D | 26 | 34.25 | 26.19 | 31.75 | 1.375 | 24 | 1.312 | 132.0 |
| SPF2800-D | 28 | 36.50 | 28.19 | 34.00 | 1.375 | 28 | 1.312 | 148.0 |
| SPF3000-D | 30 | 38.75 | 30.19 | 36.00 | 1.375 | 28 | 1.375 | 169.0 |
| SPF3200-D | 32 | 41.75 | 32.19 | 38.50 | 1.625 | 28 | 1.500 | 211.0 |
| SPF3400-D | 34 | 43.75 | 34.19 | 40.50 | 1.625 | 32 | 1.500 | 219.0 |
| SPF3600-D | 36 | 46.00 | 36.19 | 42.75 | 1.625 | 32 | 1.625 | 265.0 |
| SPF3800-D | 38 | 48.75 | 38.19 | 45.25 | 1.625 | 32 | 1.625 | 300.0 |
| SPF4000-D | 40 | 50.75 | 40.19 | 47.25 | 1.625 | 36 | 1.625 | 311.0 |
| SPF4200-D | 42 | 53.00 | 42.19 | 49.50 | 1.625 | 36 | 1.750 | 362.0 |
| SPF4400-D | 44 | 55.25 | 44.19 | 51.75 | 1.625 | 40 | 1.750 | 385.0 |
| SPF4600-D | 46 | 57.25 | 46.19 | 53.75 | 1.625 | 40 | 1.750 | 404.0 |
| SPF4800-D | 48 | 59.50 | 48.19 | 56.00 | 1.625 | 44 | 1.875 | 457.0 |
| SPF5000-D | 50 | 61.75 | 50.19 | 58.25 | 1.875 | 44 | 2.000 | 505.0 |
| SPF5200-D | 52 | 64.00 | 52.19 | 60.50 | 1.875 | 44 | 2.000 | 539.0 |
| SPF5400-D | 54 | 66.25 | 54.19 | 62.75 | 1.875 | 44 | 2.125 | 611.0 |
| SPF6000-D | 60 | 73.00 | 60.19 | 69.25 | 1.875 | 52 | 2.250 | 760.0 |
| SPF6600-D | 66 | 80.00 | 66.19 | 76.00 | 1.875 | 52 | 2.500 | 1021.0 |
| SPF7200-D | 72 | 86.50 | 72.19 | 82.50 | 1.875 | 60 | 2.625 | 1203.0 |
Each table lists, per nominal size: outside diameter, inside diameter, bolt circle, number and size of bolt holes, thickness, and weight. Dimensions and weights follow the AWWA C228 standard, and every C228 flange uses the ASME/ANSI Class 150 bolt pattern.
We manufacture to your specifications and stock domestic AIS/Buy America and imported materials, with galvanized, epoxy, and additional coatings available. Rubber expansion joints and gaskets are also supplied on request.
AWWA C228 Class SD flange dimensions are defined by nominal pipe size (NPS) and include outside diameter (OD), bolt circle (BC), number of bolt holes, hole diameter, and thickness.
Class SD flanges are typically available in sizes from 2" to 72" and follow drilling patterns compatible with ANSI/ASME Class 150. Exact dimensions vary by size and must be referenced from AWWA C228 standard tables.
Yes, Class SD flanges use ANSI/ASME Class 150 bolt patterns for sizes up to 24" and Class 150 Series A bolt patterns for sizes 26" to 72", allowing compatibility with standard piping systems, though pressure ratings and material specifications differ.
AWWA C228 Class SD flanges are rated for 175 psi in sizes 4 through 12 inches and 150 psi in sizes 14 inches and larger, at atmospheric temperature.
Often they do, because both keep to the ASME/ANSI Class 150 drilling for common sizes. Even so, they are different standards, C207 carbon steel and C228 stainless, so pressure ratings, thicknesses, and corrosion resistance differ. Confirm the pairing against each standard rather than assuming they interchange.
API International stocks the pipe sizes, pressure classes, and materials you need for your project. Our machine shop can also modify stock products to accommodate any special project requirements. Contact API International’s experienced sales team, and we will help you select the right flange for your application.
