建筑防火通用规范（GB 55037-2022）第4.2.8条

使用和生产甲、乙、丙类液体的场所中，管、沟不应与相邻建筑或场所的管、沟相通，下水道应采取防止含可燃液体的污水流入的措施。

 GeneralSpecification for Building Fire Protection (GB 55037-2022), Article 4.2.8

As for places where for using andproducing Class A, B and C liquids, their pipe and trench shall not beconnected with those of adjacent buildings or places. Measures shall be takento prevent sewage containing flammable liquids from flowing into the sewer.