Pipeline accessories and tools are free connections between various pipeline accessories and pipelines. It includes the interface of pipe fitting body, pipe and matched connector. 

The characteristics of pipeline accessories and tools are continuous on-line production, less equipment investment, economy, practicability and aesthetics. 

Classification of pipe accessories and tools: according to the purpose, it is divided into general pipe accessories and tools, galvanized pipe accessories and tools, oxygen blowing pipe accessories and tools, automotive pipe accessories and tools, transformer pipe accessories and tools. 

Pipeline accessories and tools are widely used in petroleum, chemical industry, medicine, food, machinery, aerospace, construction, military industry, hardware, boiler gas, plumbing devices, ships, power plants and other industries.