How are the flat and beveled ends used for flat-faced single-socket pipe collars and beveled-faced single-socket pipe collars?

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Flat-face single-socket pipe collars and beveled single-socket pipe collars are used to connect different types of pipe ends, respectively. A flat cut is a cut perpendicular to the tube, suitable for situations where a tight face-to-face connection is required. The groove is cut at an angle and is commonly used in areas where welding is required, as it can enhance the strength of the weld. In GBT 14383-2021, flat grooves and beveled grooves are primarily used to meet different connection and welding requirements. A flat groove is typically used for lower pressures or simpler connection requirements, whereas a beveled groove is more suitable for environments subject to higher pressures and offers better welding joint quality. Such classification helps standardize the manufacturing and installation processes, ensuring the safety and reliability of piping systems. .

Thank you for your reply. For steel pipes that comply with GB14976, should the socket weld fittings use a flat face or a beveled face? How is it usually used?

For steel pipes conforming to the GB14976 standard, the choice between a flat-faced or beveled socket ring depends mainly on the pressure that the pipeline must withstand and the method of connection. GB14976 is the standard for stainless steel seamless pipes, which are commonly used in high-temperature and high-pressure environments. 1. If welding is used for the connection and high pressure needs to be withstood, it is generally recommended to use grooved socket pipe clamps. Bevels can provide a larger welding area, increasing the strength of the weld, which is very important for high-pressure systems. 2. If it is a low-pressure system, or if other connection methods other than welding are used, such as threaded connections or clamp connections, then flat-faced socket clamps can be used. In practical applications, the appropriate connection method and corresponding socket type should be selected based on specific engineering requirements and design specifications. If in doubt, it is best to consult a professional engineer or refer to the relevant design manuals to determine the most suitable choice. .

This issue is quite complex; flat ends are generally suitable for the operating conditions specified in 7.9.2 of the \"SHT 3059-2012 Standards for Material Selection in Petrochemical Piping Systems\". As the severity of operating conditions increases, open welding, flat-end pipe clamps, beveled pipe clamps, branch pedestals, tees, and other elements can be used.