Must universal filling be used in all tank areas?

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The last edit to this post was made by Xu Xin on 2011-11-29 at 17:39. In the document titled \"Implementation Opinions of the State Administration of Work Safety and the Ministry of Industry and Information Technology on Hazardous Chemicals Enterprises’ Implementation of the State Council’s Guidelines on Further Strengthening Enterprise Work Safety\", Document No. An Jian Zong Guan San (2010) 186, there is the following passage: 14. Attach great importance to safety management in the storage and transportation stages. Formulate and continuously improve safety management systems for the receipt, storage, loading, unloading, and transportation of hazardous chemicals, and enforce strict controls over the management of such products during storage. Based on the characteristics of hazardous chemicals, appropriate level measurement instruments should be selected to enable dynamic monitoring of the liquid level in storage tanks. Establish an efficient emergency response and rapid fire suppression system for the tank farm ； Strengthen the safety management of hazardous chemical pipelines. For those pipelines that pass through public areas, it is necessary to improve signage, clarify management responsibilities, and establish and implement a regular inspection system. Effective measures must be taken to inform all units and residents along the route about the hazards associated with hazardous chemical pipelines. Strictly prevent the occupation of hazardous chemical transmission pipelines. All special vehicles used for transporting hazardous chemicals by road must have satellite positioning devices with driving record functions installed and in use by the end of 2011. In the process of filling hazardous chemicals in tank trucks, the use of metal universal piping filling systems should be promoted as a replacement for filling hoses; the use of hoses for filling liquefied hazardous chemicals such as liquid chlorine, liquid ammonia, liquefied petroleum gas, and liquefied natural gas is prohibited. Based on the above, does it mean that regardless of the type of substance stored in the tank area, as long as it is a hazardous chemical, a metal universal flexible hose must be used for filling it? Or is it only applicable to those hazardous chemicals mentioned above, such as liquid chlorine, liquid ammonia, liquefied petroleum gas, liquefied natural gas, and other liquefied hydrocarbons? The rest is just promotion, not mandatory enforcement, right? I wonder if there are any experts who know the requirements set by the relevant authorities to clarify this matter. PS: When using universal flexible hoses for loading and unloading, when is it necessary to install a loading/unloading pump, and when is it not necessary?