ASME B31.4规定了生产现场或设施、罐区、地上或地下储存设施、天然气处理厂、炼油厂、泵站、氨厂、码头（海运、铁路和卡车）之间的液体管道系统的设计、材料、施工、装配、检查、测试、操作和维护要求，以及其他输送和接收点，以及在泵站、罐区和与液体管道系统相关的终端内输送液体的管道。本规范还规定了在泥浆处理厂或终端与接收厂或终端之间输送非危险材料（如煤、矿石、精矿和其他固体材料）的含水泥浆的管道的设计、材料、施工、装配、检查、测试、操作和维护要求。

ASME B31.4 prescribes requirements for the design, materials, construction, assembly, inspection, testing, operation, and maintenance of liquid pipeline systems between production fields or facilities, tank farms, above- or belowground storage facilities, natural gas processing plants, refineries, pump stations, ammonia plants, terminals (marine, rail, and truck), and other delivery and receiving points, as well as pipelines transporting liquids within pump stations, tank farms, and terminals associated with liquid pipeline systems. This Code also prescribes requirements for the design, materials, construction, assembly, inspection, testing, operation, and maintenance of piping transporting aqueous slurries of nonhazardous materials such as coal, mineral ores, concentrates, and other solid materials, between a slurry processing plant or terminal and a receiving plant or terminal.