MWP

– Maximum Working Pressure or CWP (Cold Working Pressure)

The maximum working pressure (pounds per square inch) at which a valve can be operated. The

maximum working pressures for various pressure classes, per Table 2.1 ot`API-GD, within temperature limits of —20°F and +100°F, are as follows:

CLASS                                    MWP (CWP)

150                                         275

300                                         720

400                                         960

600                                         1440

900                                         2160

1500                                       3600

2500                                       6000