A demand for shipment of pressurized polyethylene jacketed cables is expected to continue and probably increase. Such pressurizing offers the customer insurance against jacket defects prior to installation assuming temperaturetime conditions are such that a positive pressure can be measured at the destination. A method for estimating the rate of pressure drop in pressurized cables is presented in this paper. The method is verified by experimental measurements. Gas diffusion and temperature variations can result in complete loss of pressure in pressurized cable and therefore even complete loss of pressure is not a positive indication of jacket defects. In such cases it may be necessary to re-pressurize and measure the rate of pressure drop to check for jacket defects. Author
Prepared for presentation at the Annual Symposium on Technical Progress in Communication Wires and Cables (11th), at Asbury Park, N. J., 28-30 Nov 62.