// CODE SNIPPET
1309.6.1 Exterior Surfaces
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The exterior surfaces of tube ends shall be cleaned prior to brazing to remove any
surface oxides. When cleaning the exterior surfaces of tube ends, no matter shall be allowed to enter the tube. [NFPA 99:5.1.10.4.3.2, 5.1.10.4.3.3]
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1309.3.6.1 Health Care Facilities and Medical Gas and Medical Vacuum Systems, Exterior Surfaces
The exterior
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