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This standard describes ring-type slip-on flanges and blind flanges. The flange pressure limits and the tables that describe them are Ring-type, slip-on flanges (see Tables 2, 3 and 4). Blind flanges (see Table 5). Unless otherwise specified by the purchaser, the manufacturer shall select the type to be used.Flanges in this standard are intended for use with steel pipe, fittings, or appurtenances meeting the requirements of ANSI/AWWA C200, ANSI/AWWA C208, or other equivalent standards. It is intended that flanges be attached by welding in accordance with Sec. 4.3 of this standard. The pressure limits for flanges are provided in Tables 2 through 5. Pressure limits are for conditions and temperatures customary in water utility service. This standard does not take into account external moments resulting from the pipe acting as a beam.