I. Main FunctionsPermanent Pipe Sealing: Primarily used for welding or threaded connections at the ends of pipes, completely sealing the pipeline and preventing media leakage. Unlike removable blind flanges, once welded and installed, it is usually permanent.Temporary Protection During Transportatio

The core reason for using beveling on steel pipes is to ensure weld quality, especially when the pipe wall is thick. Simply put, beveling involves machining a groove of a specific geometric shape at the end of the steel pipe to be welded, creating the necessary conditions for a high-quality weld.The

There are four main methods for surface pretreatment of steel pipes:Cleaning: Using solvents or emulsifiers to remove grease and dust from the steel pipe surface. This method can only handle organic contaminants and cannot remove rust or oxide scale, so it is usually only used as an auxiliary proces

I. Core Quality Verification ItemsThese are crucial for ensuring the basic performance of pipeline pipes meets requirements.1. Mechanical Properties:Tensile Test: The core requirement is to ensure that the yield strength and tensile strength are within the allowable range of the standard. Different

High-steel grade pipelines (such as X70, X80, and above) are mainly used in applications with stringent requirements for pipeline transportation efficiency, safety, and adaptability to extreme environments. Their core function is to serve the long-distance, large-scale transportation of modern oil,