Flange dimensions and weights to AWWA C228 Class SA 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 SA 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-A | 2 | 6.00 | 2.44 | 4.75 | 0.750 | 4 | 0.500 | 3.0 |
| SPF0250-A | 2.5 | 7.00 | 2.94 | 5.50 | 0.750 | 4 | 0.500 | 4.0 |
| SPF0300-A | 3 | 7.50 | 3.57 | 6.00 | 0.750 | 4 | 0.500 | 4.7 |
| SPF0400-A | 4 | 9.00 | 4.57 | 7.50 | 0.750 | 8 | 0.500 | 6.4 |
| SPF0500-A | 5 | 10.00 | 5.66 | 8.50 | 0.875 | 8 | 0.500 | 7.2 |
| SPF0600-A | 6 | 11.00 | 6.72 | 9.50 | 0.875 | 8 | 0.500 | 8.4 |
| SPF0800-A | 8 | 13.50 | 8.72 | 11.75 | 0.875 | 8 | 0.500 | 11.4 |
| SPF1000-A | 10 | 16.00 | 10.88 | 14.25 | 1.000 | 12 | 0.625 | 17.4 |
| SPF1200-A | 12 | 19.00 | 12.88 | 17.00 | 1.000 | 12 | 0.625 | 25.5 |
| SPF1400-A | 14 | 21.00 | 14.19 | 18.75 | 1.125 | 12 | 0.625 | 31.3 |
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 SA 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 SA flanges are typically available in sizes from 2" to 14" and follow drilling patterns compatible with ANSI/ASME Class 150. Exact dimensions vary by size and must be referenced from AWWA C228 standard tables.
Class SA is ideal when pressure requirements are low, but corrosion resistance is critical, helping reduce cost while still maintaining material performance.
AWWA C228 Class SA flanges are rated for 50 psi at atmospheric temperature, the lowest of the C228 stainless classes.
Not exactly. AWWA C207 (carbon steel) and C228 (stainless steel) share many bolt circles and drilling patterns, so they frequently mate, but they are separate standards with different materials and thickness schedules. Confirm the exact dimensions, pressure class, and service conditions before treating one as a drop-in for the other.
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.
