The attention matters of rubber joint.
What are the problems in installation using rubber joint need to know?Tianyuan pipeline equipment factory, set many years of experience as below summary, want to ready to use in a flexible rubber joint friends help.
1, the connection of the rubber joint flange should be the valve flange or in line with the GB/T9115.1 (RF) of the flange.
2, when the pipeline medium for acid and alkali, oil, high temperature, and other special materials should be chosen when the above pipeline working pressure of a gear coupling.
3, must according to the working pressure pipeline, connecting method, medium, and compensation amount to choose the appropriate model, the number of selected according to the displacement of noise reduction requirement.
4, rubber joint on initial stress (such as: installation testing, etc.) or disable before enabled again for a long time, after should tighten bolts pressure again again put into operation.
5, when the pipeline instantaneous pressure is greater than the pressure of work and should be chosen when higher than working pressure of a gear coupling.(such as: pipe to start the instantaneous pressure > 1.0 MPa, elected labor as a sub 1.6 MPa. Instantaneous pressure > 1.6 MPa, 2.5 MPa should choose joint).
6, normal applicable medium can be curved around the rubber joint, it is ordinary water temperature from 0 to 60 ℃, such as special medium: oil, acid and alkali, high temperature and corrosion resistance and other hard cases, should choose the corresponding materials resistant rubber joints, do not blindly string or gm.
7, in a flexible rubber joint used in the import and export, the pump should be located near the water pump, and pump should be installed between the metal joint variable diameter, large caliber and installed in a variable diameter.
8, when the displacement of joint or the maximal amount of compensation, should increase the number of joint to parallel displacement, it is strictly prohibited to adjust the pipeline super bad, make the joint in the limit state of flexure displacement and deviation, more not in excess of the limit (telescopic, displacement, deflection, etc.), using specific installation data as shown in the table below.
9, high-rise or impending water supply, water pipes should be fixed on the hanger, bracket, or anchor frame, and cannot make joint pipe under its own weight and axial force, otherwise the joint should be equipped with protection pulled off (the tolerances must be greater than the pipe axial force).
10, installing a rubber joint, joint screw should be extended to the outside of the bolt each end of the flange bolts according to the method of diagonal compression repeatedly evenly tighten, prevent partial pressure.Wire joint should use standard wrench tight uniform force, do not use a torque rod strength makes the union slippery silk, smooth edges and fracture, and to periodically check, lest cause off or loose.
11, use or storage of rubber joint, should avoid high temperature, ozone, oil, acid and alkali environment.Used in outdoor or xiangyang wind pipe should build sunshade frame, it is forbidden to insolate, rain and wind erosion.It is forbidden to paint and winding insulation joint surface.Because of rubber aging problems, should be timely check the replacement.