What is the difference and connection between the pipe trench and threaded fittings

　　What is the difference and connection between the pipe trench and threaded pipe?

　　Asked some general and groove pipe connection mode can be divided into screw type or clamp, screw thread pipe fittings is screw type connecting pipe fitting collectively, according to process is divided into cast iron, forging, copper, stainless.

　　It is important to welding groove fittings, threaded pipe is a pipe connection.

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