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58.22.2 )usTR1AL RELATIONS TITLE 8 (Re9iator 7.x,0. 13--12475) .- (4) The manufacturer's name and catalog number. (5) The symbol of the ASME Code. History.• 1. Amendment filed 12.8-72 as procedural and organizational; effective upon filing (Register 72, No. 50). 2. Amendment of subsections (a) and (d) filed 3-28-75;effective thirtieth day thereafter (Register 75, No. 13). 512. Repairs and Alterations. (a) Field welding, where necessary, shall be made only on nonpressure parts that were installed by the manufacturer of the tank. (b) No repairs or alterations involving flame, arc, or other method of welding shall be made to any tank until such tank has first been certified as free of anhydrous ammonia by competent personnel. (c) No repair or alteration affecting the safety of the tank shall be made until the contemplated repair or alteration has been authorized by a qualified inspector. Nothing in this order shall prohibit the ex- change or interchange of valves, fittings, and appurtenances intended for the samepurpose. (d) No tank that has been subjected to a fire shall be returned to service until it has been inspected by a qualified inspector and found to be safe. (e) Any vessel requiring repair or alteration or that has been subject- ed to a fire shall be prepared for hydrostatic test by the owner when such test is deemed necessary by the qualified inspector. (f) All repairs affecting the safety of the tank shall be reported to the Division within 21 days by the qualified inspector authorizing such repairs. The qualified inspector shall stamp his certificate of competen- cy number adjacent to all welded repairs authorized by him, except that in the case of repairs to quenched and tempered steels, this num- ber need not be stamped. This exception shall be noted on the inspec- tor's report. (g) Any welding necessary when making repairs or alterations to tanks shall be done by welders and welding procedures qualified in accordance with Section IX of the ASME Code in the position or posi- tions used in making the repair. History. 1. Amendment filed 12.8-72 as procedural and organizational;effective upon filing (Register 72, No. 50). 513. Anhydrous Ammonia Refrigeration Systems. Mechanical re- frigeration systems using anhydrous ammonia as a refrigerant shall be installed and maintained according to the provisions of the General Industry Safety Orders. History.• 1. Amendment filed 12-8-72 as procedural and organizational;effective upon filing (Register 72, No. 50). 514. Installation of Refrigerated Storage Containers. (a) Contain- ers shall be supported on suitable noncombustible foundations designed to accommodate the type of container being used. Adequate protection against flotation or other water damage shall be provided wherever high flood water might occur. Containers for product storage at less than 32° F. shall be supported in such a way, or heat shall be supplied, to prevent the effects of freez- ing and consequent frost heaving.