The working pressures of the ABALOK tube fittings are determined by the tube characteristics where there are installed. Therefore, the maximum internal pressure limit is provided by the tube, that will collapse before than the connector.
The ends with female or male NPT threads have their own admissible maximum working pressures. Therefore, when a connector has ends of this kind, the union service pressure will be given by the minimum working admissible pressure of the ends that is composed.
The admisible pressures indicated below (PSI) corresponds to a usage under room conditions:
What to do if higher temperatures or more demanding overpressure and vibration conditions are used?
A factor must be applied to reduce said maximum pressure.
Below is the factor with which the pressure obtained previously must be multiplied depending on the working temperature:
Example:
The Pmax of an ABALOK RM 4-4-316 male straight connector (1/2″OD x 1/2″NPT M) on a 1/2″ x 0.049″ tube, at room temperature, is 3526 psi. While at 212 °F, when applying the conversion factor (0.85), would be 2997 psi.
NEVER use the ABALOK connectors over these admissible pressures & temperatures.
