Trench fittings are sometimes referred to as pipeline link fittings, so what gives them such a unique or industry name? There is actually a certain reason behind it, which fully demonstrates the importance of groove fittings in pipeline connections. In our modern construction of pipeline connections, we have basically used groove fittings. The main reason is that when using grooved pipe fittings, only one groove is squeezed out on the outer surface of the connected pipeline using a rolling groove machine, without damaging the inner wall structure of the pipeline. This is a unique technical advantage of grooved pipe fittings connection. Compared to traditional welding connection methods, this is firstly easy to operate, secondly smooth and good-looking in appearance, thirdly anti-corrosion treatment has been done, and fourthly not limited by the technical operation of workers. These reasons and reasons are sufficient to prove the importance and status of groove fittings in pipeline connections.