The provisions of Part 4, Chapter 6, Section 1 (referred to as Section 4-6-1) apply to all piping systems. These include piping systems covered in Section 4-6-2 through Section 4-6-7, as well as to piping systems in Part 4, Chapter 7 "Fire Safety Systems", and to piping systems of specialized types of vessels in the applicable sections of Part 5C.
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