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| TABLE A2.3 Pressure-Temperature Rating of ASME B16.3 Malleable-Iron Threaded Fittings |
Malleable-Iron Threaded Fittings
Malleable-iron fittings are also extensively produced. They are generally made with threaded joints. Malleable-iron threaded fittings for Classes 150 and 300 are standardized in ASME B16.3. The standard specifies the same attributes for Class 150 and 300 fittings as discussed under ASME B16.4 for gray-iron fittings. The fittings are available in a variety of configurations from NPS 1⁄₈ (DN 3) through NPS 6 (DN 150). The pressure-temperature ratings of these fittings are listed in Table A2.3. As with cast-iron fittings, the ratings are independent of the contained fluid and are maximum non shock pressures at the listed temperatures. Malleable iron fittings are furnished black, galvanized, or as otherwise ordered by the buyer. The galvanized threaded fittings commonly used in water piping for homes are Class 150 malleable iron. Minimum properties of malleable iron are required to meet ASTM A197 Cupola Malleable Iron requirements. The fittings are threaded with ASME B1.20.1 pipe threads.
Malleable-iron fittings are also extensively produced. They are generally made with threaded joints. Malleable-iron threaded fittings for Classes 150 and 300 are standardized in ASME B16.3. The standard specifies the same attributes for Class 150 and 300 fittings as discussed under ASME B16.4 for gray-iron fittings. The fittings are available in a variety of configurations from NPS 1⁄₈ (DN 3) through NPS 6 (DN 150). The pressure-temperature ratings of these fittings are listed in Table A2.3. As with cast-iron fittings, the ratings are independent of the contained fluid and are maximum non shock pressures at the listed temperatures. Malleable iron fittings are furnished black, galvanized, or as otherwise ordered by the buyer. The galvanized threaded fittings commonly used in water piping for homes are Class 150 malleable iron. Minimum properties of malleable iron are required to meet ASTM A197 Cupola Malleable Iron requirements. The fittings are threaded with ASME B1.20.1 pipe threads.
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| TABLE A2.4 Pressure-Temperature Rating for Classes 125 and 250 Cast-Bronze Threaded Fittings (ANSI/ASME B16.15-1985)* |
Cast-Brass and Cast-Bronze Threaded Fittings
Cast-brass and -bronze threaded fittings are
commonly produced for use with brass pipe. The fittings are manufactured in accordance with ASME B16.15 in pressure Classes 125 and 250. The standard establishes pressure-temperature ratings, size and method of designating openings of reducing fittings, marking, minimum requirements for casting quality, and materials. The non shock pressure-temperature ratings are listed in Table A2.4. The permitted materials for the fittings are:
ASTM B62, alloy C83600
ASTM B584, alloy C83800 and C84400
ASTM B16, alloy C36000 (bar stock)*
ASTM B140, alloy C32000 or C31400 (bar stock)*
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