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순서 Number Title 1 B31.1 Power Piping 2 B31.2 Fuel Gas Piping 3 B31.3 Process Piping 4 B31.4 Pipeline Transportation Systems for Liquid Hydrocarbons and Other Liquids. 5 B31.5 Refrigeration Piping and Heat Transfer Components. 6 B31.8 Gas Transmission and Distribution Piping Systems. 7 B31.8S Managing System Integrity of Gas Pipelines. 8 B31.9 Building Services Piping. 9 B31.11 Slurry Transportat..