The draft Regulations on the Safety Supervision of Special Equipment is in conflict with the draft national standard for pressure pipelines
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It was found that a regulation currently under public consultation, namely the \"Regulations on the Safety Supervision of Special Equipment (Draft for Public Comment)\", and a **recommended standard GB/T 20801.1 \"Code for Pressure Piping – Industrial Piping\", which is also subject to public consultation, have significant differences regarding the definition of pressure piping. Pressure pipelines, as defined in the Supplementary Provisions of Chapter 8 of the \"Regulations on the Safety Supervision of Special Equipment (Draft for Public Comment)\", are described as follows: \"Pressure pipelines refer to tubular devices that use a certain pressure to transport gases or liquids; they are defined as those with a maximum operating pressure of 0.1 MPa or higher, and whose medium is gas, liquefied gas, steam, or substances that are flammable, explosive, toxic, corrosive, with a maximum operating temperature of...\" However, clause 1.2 of the \"Code for Pressure Piping – Industrial Piping\" (draft for comment) defines the scope of pressure piping as follows: \"This document applies to pressure piping that meets the following conditions: a) Process piping and refrigeration piping that fall within the scope of TSG XXXX \"Technical Regulations for the Safety of Industrial Piping\": that is, those with a maximum operating pressure of 0.1 MPa (gauge pressure) or more, and whose medium is gas, liquefied gas, steam, or is flammable, explosive, toxic, corrosive, with a maximum operating temperature of...\" The difference lies in the type of medium – one case involves \"combustible\" liquids, while the other involves \"flammable\" liquids.
The range of pressure pipes that I support applies to “flammable” liquids. Because, at normal temperatures, the risk of transporting liquids with a high flash point (above 93°C) is already very low, so there is no need to classify them as special equipment that requires special oversight.
The two draft documents do differ in their definitions of pressure pipelines, mainly in the description of the medium: one uses the term \"flammable\" liquids, while the other uses \"combustible\" liquids. Such differences may affect the safety standards and regulations for pipelines; it is recommended that relevant authorities coordinate and standardize these rules in order to eliminate ambiguity. .
I also think it’s more appropriate to use “flammable” as the criterion for classification
Submit your suggestions to the Market Regulation Bureau, recommending that the term \"flammable\" liquids be replaced with \"highly flammable\" liquids in the definition of pressure pipelines as outlined in the Regulations on the Safety Supervision of Special Equipment.
It was also found that there are significant differences regarding the specifications for pipe diameters: Pressure pipes as defined in Chapter VIII, Supplementary Provisions of the \"Regulations on the Safety Supervision of Special Equipment (Draft for Public Comment)\") are described as follows: \"......pipes with a nominal diameter greater than 50 mm.\" ” However, clause 1.2 of the ‘Code for Pressure Piping – Industrial Piping’ (draft for comment) defines the scope of pressure piping as: “......pressure pipelines with a nominal diameter of 50 mm or greater.” “ ————Branches larger than DN50 and those larger than or equal to DN50.