40 00 00 Process Interconnections

40 10 00 Gas and Vapor Process Piping and Ductwork

40 11 00Steam Process Piping40 12 00Compressed Air Process Piping40 13 00Process Ductwork40 15 00Combustion System Gas Piping40 16 00Specialty and High-Purity Gases Piping40 17 00Welding and Cutting Gases Piping40 18 00Vacuum Systems Process Piping

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