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TITLE 8 J DIVISION OF INDUSTRIAL S' FETY 58.5 UNFIRED PRESSURE VESSEL Si /Y ORDERS C, (Roglster 76. hb.32-57.78) (c) No tank or cylinder 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. (d) Any vessel requiring repair or alteration or that has been subject- ed to a fire shall be prepared for hydrostatic tests by the owner when such test is deemed necessary by the qualified inspector. (e) No repairs shall be performed on any motor vehicle carrying LP-Gas, nor on a transport tank, trailer, or skid tank, whether empty or loaded, until reasonable precaution has been taken to provide the re- quired safety. (f) All repairs affecting the safety of LP-Gas tanks shall be reported to the Division within 21 days by a 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 in the inspec- tor's report. (g) An welding necessary when making repairs or alterations to tanks shall be done by a welder qualified in accordance with Section IX of the ASME Code in the position or positions used in making the repair. Repairs to DOT cylinders shall be made under DOT regulations and control. History.• 1. Amendment filed 12.8.72 as procedural and organizational;effective upon filing (Register 72, No. 50). ` Article 6. Anhydrous Ammonia Introduction The provisions of Article 6 need not apply to anhydrous ammonia installations up to the point of delivery to a transportation tank in plants manufacturing this product or in refrigeration plants where ammonia is used solely as a refrigerant; provided, however, that tanks used in such plants shall be designed and constructed in accordance with the provisions of Article 2, and shall be maintained and operated in accord- ance with the provisions of Article 4 of these Orders. - History. 1. Amendment of introduction filed 3.28-75;effective thirtieth day thereafter (Register 75, No. 13). 500. Approval of Devices. (a) All devices which are used in anhy- drous ammonia service shall be of a type and construction suitable for the use to which they are put. They shall preferably be listed by at least one nationally recognized testing laboratory.such as, but not limited to, Underwriters Laboratories, Inc. and Factory Mutual Engineering Corp. (For the purposes of this paragraph, the word "listed" means that equipment is of a kind mentioned in a list which is published by a nationally recognized laboratory which snakes 'periodic inspection of the production of such equipment, and states'such equipment meets nationally recognized standards or has been tested and found safe for use in a specified manner.)