The standard only applies to floor drains used in general industrial and civil buildings, and does not apply to special places such as anti-wave floor drains for civil air defense projects and explosion-proof floor drains for petrochemical enterprises. For floor drains in special places, in addition to referring to this standard, it should also meet the technical requirements of related industries. It excludes ground water. The water quality is worse than any other appliance. It has more solids, fibrous materials, hairs, easy deposits, etc. It is different from other materials such as zinc alloy, copper and other materials and has its unique characteristics. Good price and low price. At the same time, it has 304, 201 and other materials, and the price is moderate, which is suitable for the needs of consumers of different levels.