Is the gas pipeline from the factory area to the supporting residential area GB or GC?

According to the classification of pressure pipelines, it is defined by the factory perimeter wall. Many design institutes possess both GB and GC qualifications, as do the construction companies.

Gas is used for things such as boilers in the canteens within the factory premises, and it is not intended for production processes. In accordance with the latest specifications from 2021, such pipelines must be designed, constructed, and inspected in line with the standards for public utility pipelines (GB), rather than using the standards for industrial GC pipelines. Some petrochemical enterprises, in order to avoid qualification issues, classify boilers and other equipment in the plant’s canteens that use gas pipelines as GC industrial pipelines; however, design, construction, and acceptance still follow GB50028 \"Urban Gas Pipelines\". Gas is used for things such as boilers in the canteens within the factory premises; although they are located inside the factory, their purpose is to serve the living needs of residents (employees), and thus they fall under the jurisdiction of public gas pipelines. This has nothing to do with whether there are walls surrounding the factory or not. Under no circumstances should one try to save costs by operating it secretly using industrial GC pipes. Areas such as the canteens and boilers within the factory complex fall under the pre-factory zone, which are densely populated areas. The gas used in these canteens and boilers must be treated with odorization using standard GB gas pipeline systems as well as pressure regulation units, in order to be used safely for the heating needs of employees and residents. Under no circumstances should one design it incorrectly based on industrial pipeline standards in an attempt to save costs and effort, as liability for any accidents that occur will persist for life. Some experts who are involved in formulating GB public pipeline standards have no experience with gas pipelines used for domestic purposes within factories; it is a grave mistake to assume that such pipelines fall under the category of GC pipelines simply because they are located within the factory walls. Areas such as the canteens and boilers within the factory complex fall under the pre-factory zone, which are areas with high concentrations of people. The gas used in canteens and boilers must be treated with odorization and equipped with pressure regulation units in accordance with GB standards for public gas pipelines. The gas pipelines used for the domestic needs of factory employees, their families, and other people in this area must also be designed and constructed in strict compliance with GB pipeline specifications. It is absolutely crucial not to neglect the safety of these people just to save time, money, or avoid the need for certain certifications; accidents can have serious consequences.