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TABLE 11 Ammonia Refrigeration Valves Inspection, Testing, and Maintenance Tasks CarbonITM Task Description Frequency Non- Insulated Insulated Carbon Stainless Steel Steel Steel Steel Inspection a)Visually inspect metal surfaces for pitting or surface damage NA NA A A b) Visually inspect for damage or moisture incursion in insulation (i.e., dampness, condensation, frost, ice buildup, A A NA NA c) Visually inspect for indications of degradation of the protective coating - - NA NA A WA-A'_ d) Visually inspect valve supports for cracks and degradation WA WA WA WA e) Visually inspect valve mounting bolts are in place WA WA WA WA f) Visually inspect insulation protective jacketing A A NA NA g) Visually inspect condition of valve flanges, bolts, and gaskets NA NA WA WA h) Visually inspect that system emergency shut-off valves are clearly and uniquely identified at each valve (at field A A A A, location) and in the system schematic drawings a) Proceed with Nondestructive Testing (NDT) to determine the extent of identified deficiencies where visually NA NA WA-.A WA.-A observed b) Remove insulation if necessary to perform evaluation i J,A �JA. c) Functionally test system emergency shut-off valves 5 5 5 5 a) Replace missing or broken hangers, hanger rods, and pipe support saddles A A A A b) Exercise and lubricate stems on system emergency shut-off valves A A A A c) Exercise and lubricate non-emergency shut-off valves 5 5 5 5 Frequencies: D — Daily, W—Weekly, M— Monthly, Q—Quarterly, S—Semiannual, A—Annual, B — Biennial, 3 —Three Years, 5 — Five Years, 10—Ten Years, WA— Where Applicable, NA— Not Applicable, NR— Not Required. Others as noted. *For Pressure Relief Valves (PRVs), see Chapter 13 Overpressure Protection Devices. "For-specified performance criteria requirements of Ammonia Refrigeration Valves, see ANSI/IIAR 3