AWWA C228-25 Stainless-Steel Pipe Flange Joints for Water Service—Sizes 2 In. Through 72 In. (50 mm Through 1,800 mm) (PDF)
The purpose of this standard is to provide minimum material requirements and dimensions for a variety of stainless-steel flanges for attachment to stainless-steel piping systems.
Description
This standard describes stainless-steel, ring-type, slip-on flanges and blind flanges for use in conjunction with stainless-steel pipe used in facilities of waterworks service:
1.3.1 Intended use. Flanges in this standard are described in the following tables:
1. Table 2 and Table 3, ring-type slip-on flanges
2. Table 4, blind flanges
Flanges covered in this standard are intended for use with stainless-steel pipe or appurtenances meeting the requirements of AWWA M11, ANSI/AWWA C220, ANSI/AWWA C226, or other equivalent standards. It is intended that flanges be attached in accordance with Sec. 4.3 of this standard.
1.3.2 Pressure limits. Pressure limits as stated in Tables 2, 3, and 4 are based on conditions and temperatures customarily found in water and wastewater applications. Maximum sustained operating pressure, plus any anticipated surge/transient pressures, should not exceed flange pressure limits. Transient pressures should not exceed 150 percent of the working pressure. Pressure limits are for conditions and temperatures customary in water utility service.
1.3.3 Flange design. This standard does not take into account external moments resulting from the pipe acting as a beam.