Categories Of Piping

Somewhat different requirements apply to the various section of pipe, depending on the location and purpose served in the system. Table 9.1 lists the various categories of piping in an industrial system, the state of the refrigerant, the importance of pressure drop, and whether pitching or trapping is required. The pipes listed in Table 9.1 carry either liquid or vapor, except for several lines in liquid recirculation systems that convey a mixture of liquid and vapor. The almost universal criterion for selecting the pipe size is the pressure drop, and this calculation is used in one form or another in practically all pipe selections.

fig 1 236 - Categories Of Piping