Second Revision No. 50-NFPA 780-2015 [ Detail ]

7.4.2 Storage Tanks Under Pressure. 7.4.2.1 It shall be permitted for the authority having jurisdiction to waive the requirements of this chapter for s Sealed metallic tanks, vessels, and process equipment that contain flammable or combustible liquids or flammable gases under pressure are considered to be inherently self-protecting provided ................
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