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SAFETY INFO - Page 3 <br /> ANHYDROUS AMMONIA HOSE INSPECTIONS <br /> replaced. Leaks indicate puncture, inner liner failure or coupling assembly <br /> defect. <br /> If hose is known to have been in service at pressure above its design pressure, <br /> it must be discarded. <br /> Hose Repair <br /> If the defective section can be removed by shortening the hose, or cutting <br /> the ends, it is permissible to return to service after installation of <br /> couplings according to manufacturer's recommended procedure. <br /> Hydrostatic Testing <br /> If after manual inspection the inspector questions the hose, he may recommend <br /> hydrostatic pressure testing. Such testing should be done by an experienced <br /> person having proper test equipment. <br /> Hydrostatic pressure testing fills the straightened hose with water slowly <br /> to a pressure equal to 150% of its design pressure. Care must be used to <br /> insure the hose contains no air or gas and it must be restrained for its <br /> full length to prevent whipping should a burst occur. Operators should wear <br /> eye protection and personnel should stay clear of the ends. <br /> Records <br /> Records should be maintained to indicate when the hose entered service and <br /> when it was last inspected. <br /> Remember <br /> This testing doesn't guarantee that a hose will not fail. Careful inspection, <br /> however, should reduce the chance of a hose bursting in service. <br /> Mansel M. Mayeux, Professor - Louisiana State University suggests the <br /> following manual testing procedure: <br /> Hose <br /> The hose has been a source of trouble over the years. Minimize that <br /> trouble by following some common sense rules. <br /> 1. Buy quality hose made to TFI-RMA specifications. <br /> 2. Couple the hose properly. <br /> 3. Do not mix coupling parts. <br /> 4. Drape your hose - kinking weakens the reinforcing fiber. <br /> 5. Visually inspect hose prior to each use and inspect manually once <br /> a week. <br />