Distance requirements between pipelines carrying flammable and explosive materials and other buildings or facilities

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This problem often arises in industrial sites: buildings such as inspection rooms and workshop control rooms are constructed beneath the pipe racks on these sites, which house ammonia pipelines, liquid ammonia pipelines, steam pipelines, and sulfuric acid pipelines. I checked the \"Code for General Layout and Transportation Design of Chemical Enterprises\" (GB 50489-2009), the \"Code for General Layout Design of Industrial Enterprises\" (GB 50187-2012), and the \"Code for General Layout Design of Petroleum and Natural Gas Projects\" (SYT 0048-2009); all of these codes specify minimum horizontal distances between pipe racks and buildings. However, each of these codes includes a note stating that the minimum horizontal distance between pipe racks carrying flammable liquids, flammable gases, liquefied petroleum gas, or liquefied hydrocarbons and buildings or structures should comply with the provisions of **relevant current standards. ” I would like to ask everyone: what are the minimum horizontal distances between flammable liquids, flammable gases, and buildings or structures? **Are there any current relevant standards that specify such distance requirements?