1. Trench fittings include two major categories of products:

(1) The pipe fittings that serve as connections and seals include rigid joints, flexible joints, mechanical tees, and grooved flanges;

(2) The pipe fittings that play a transitional role in connection include elbows, tees, crosses, reducers, blind plates, etc.

(3) The groove connecting pipe fittings that play a role in connecting and sealing mainly consist of three parts: sealing rubber rings, clamps, and locking bolts. The rubber sealing ring located on the inner layer is placed on the outer side of the connected pipeline and matches the pre rolled groove. Then, clamp the outer part of the rubber ring and tighten it with two bolts. Due to its unique sealable structural design of rubber sealing rings and clamps, the groove connectors have good sealing performance, and their sealing performance is correspondingly enhanced with the increase of fluid pressure in the pipe.

2. Connection advantages of groove fittings:

(1) Easy to operate (2) The original characteristics of the pipeline are not affected (3) It is beneficial for construction safety (4) The system has good stability and is easy to maintain

3. Scope of application

As an advanced pipeline connection method, groove pipe fittings can be either exposed or buried, with both steel and flexible joints. Therefore, it has a wide range of applications.

① By system: can be used for fire water systems, air conditioning hot and cold water systems, water supply systems, petrochemical pipeline systems, thermal and military pipeline systems, sewage treatment pipeline systems, etc;

② According to pipeline material, it can be used to connect steel pipes, copper pipes, stainless steel pipes, plastic lined steel pipes, ductile iron pipes, thick walled plastic pipes, and hoses and valves with steel pipe joints and flange joints.