Pumps with Radially split casings and Axially-split casings operating temperature and pressure ranges

Unless otherwise specified, pumps with radially split casings are required for any of the following operating conditions.

a) A pumping temperature of 200 °C (400 °F) or higher (a lower temperature limit should be considered if thermal shock is probable).

b) A flammable or hazardous pumped liquid with a relative density of less than 0,7 at the specified pumping temperature.

c) A flammable or hazardous pumped liquid at a rated discharge pressure above 10 000 kPa (100 bar)

(1 450 psi). Axially-split casings have been used successfully beyond the limits given above, generally for off-plot applications at higher pressure or lower relative density (specific gravity). The success of such applications depends on the margin between design pressure and rated pressure, the manufacturer’s experience with similar applications, the design and manufacture of the split joint, and the user’s ability to correctly remake the split joint in the field. The purchaser should take these factors into account before specifying an axially-split casing for conditions beyond the above limits.