Gordon, J.A., 1959. END BLANKING PLUG FOR TESTING SMOOTH BORE, HIGH BURSTING PRESSURE FIRE HOSE. Fire Research Notes 404
With the introduction of smooth-bore fire hose made from synthetic fibres, it was found that the existing plugs used for hose testing were inadequate to retain a sufficiently high pressure without blowing out. In this note is described a plug which was designed to contain the pressure up to the bursting point of this type of hose.