AWWA C207 - 2018 Steel Pipe Flanges for Waterworks Service

ANSI / AWWA C207 - 2018 Steel Pipe Flanges for Waterworks Service

Sizes 4 In. Through 144 In. (100 mm Through 3,600 mm)

AWWA C207 describes ring-type slip-on flanges and blind flanges. The flange  pressure limits and the tables that describe them are 1. Ring-type, slip-on flanges (see Tables 2, 3, and 4). 2. Blind flanges (see Table 5). Unless otherwise specified by the purchaser, the manufacturer shall select the  type to be used.

TThe purpose of AWWA C207 is to provide minimum requirements and  dimensions for a variety of steel flanges for attachment to steel water pipe and  fittings.

Materials shall comply with the requirements of the Safe  Drinking Water Act and other federal regulations for water systems as applicable.

The selection of materials is critical for water service and  distribution piping in locations where there is likelihood the pipe will be exposed  to significant concentrations of pollutants composed of low-molecular-weight  petroleum products or organic solvents or their vapors. Documented research  has shown that pipe materials (such as polyethylene and polyvinyl chloride) and  elastomers, such as those used in jointing gaskets and packing glands, are subject  to permeation by low-molecular-weight organic solvents or petroleum products.  If a water pipe must pass through such a contaminated area or an area subject to  contamination, consult with the manufacturer regarding permeation of pipe walls,  jointing materials, and so on before selecting materials for use in that area.

Bolting materials. Bolts and studs shall be ASTM A193/A193M  Grade B7 with ASTM A194/A194M Grade 2H heavy hex nuts or ASTM A563  heavy hex nuts for 1 in. and smaller. Bolting shall have product marking in  accordance with ASTM A193/A193M and ASTM A962/A962M.