Installation requirements for grooved fittings

1、Choose the proper sealing ring when ordering groove parts to choose the appropriate sealing ring in the pipeline different media requires different materials of sealing ring, there are eight different materials of sealing ring on the market to apply to different media

2、Pipe groove (also called channeling) is the key of pipe connection technology, is also very important in determining the quality of groove is connected Width and depth of the groove size shall conform to the requirements in the roll groove, pipe end should level off, without burr, the port should be perpendicular to the pipe axis, it rolled out of the groove and the central axis to the vertical pipe, and at the same time to ensure that the groove to the length of the pipe end should be equal If the ellipticity of the pipeline and the thickness of the welded galvanized pipe wall are uneven, it should be corrected as far as possible when rolling groove, otherwise the groove will produce uneven depth phenomenon, which can not ensure their tightness

3.For seamless steel tube groove connection, should choose normal manufacturer has finished plating zinc products, if used to buy seamless steel tube galvanized way out again, due to steel tube long stored form oxidation corrosion, usually galvanized quality cannot be guaranteed, the zinc coating adhesion is poor, the galvanized layer is easy to crack when channeling, even fall off, which affects the service life of the seal and In order to achieve good sealing performance after pipeline installation, in addition to the selection of groove parts with good performance and ensure no damage to the sealing ring, the flange and the outside of the sealing ring need to be coated with a layer of neutral lubricant to ensure that the lip of the sealing ring and the pipe sealing ring fit more tightly

4、Rigid joints in grooves flexible joints should be used reasonably rigid joints are suitable for low-pressure pipelines that need rigid connections, such as spray risers, long-distance straight pipes, valves, equipment and other connections. They are required to be used on occasions where the pipeline is not allowed to produce displacement and torsion, so as to obtain good rigidity The flexible joint is suitable for connecting medium and low pressure pipelines. After installation, the pipeline is allowed to shrink the deviation Angle and compensate the trace displacement of the pipeline. It is more suitable for pipeline installation in uneven environment. Also can absorb noise vibration, absorb earthquake stress, generally used in the water pump in the fire system

5、If the fire horizontal pipe distance is long, when the hanger is used, in order to suppress and prevent pipeline channeling, it is recommended to use flexible joints in the middle part to ensure that the axial channeling pipe is not large, so as not to affect the bending of the transverse branch pipe connected with it

6、In the case of a certain temperature difference in the installation of fire pipe, pipe with fixed bracket and anti-sway bracket, flexible joint and rigid joint combination can be used, so that the axial force produced by pressure or temperature change will not affect the bending of the transverse branch pipe