Description
Temperature Adjustment Factors:
In general, the strength and therefore the pressure rating of metal hose decreases as the temperature increases. Thus, as the operating temperature of a metal hose assembly increases, its maximum allowable working pressure decreases. The pressure rating shown below for corrugated and interlocked hose are valid at 70°F. Elevated service temperatures will decrease these pressure ratings by factors show in the following chart. Derating factors are based on braid alloy. For example, to calculate the maximum working pressure for a 700 series 3/4″ 321 stainless steel corrugated hose with one layer of 304L braid that will be operating at 800°F, mutiply working pressure (792 PSIG) by appropriate derating factor (.73). The working pressure for the hose at 800°F is 578 PSIG. Keep in mind, the maximum working temperature of the end fittings and method of attachment must also be considered.
