ISO 13259:2018 pdf free

ISO 13259:2018 pdf free.Thermoplastics piping systems for underground non-pressure applications一Test method for leaktightness of elastomeric sealing ring type joints
The apparatus shall include the following items which all shall be capable of resisting the forces and pressures generated during the test.
End sealing devices, having a size and using a sealing method appropriate to seal the non-jointed ends of the test assembly. The devices shall be restrained in a manner that does not exert longitudinal forces on the joint at positive pressures.
Hydrostatic pressure source, connected to one of the sealing devices, or to the test piece, and capable of applying and maintaining the specified pressure [see 8.1 items g) and h)].
Mechanical or hydraulic device, capable of applying the necessary diametric deflection to the spigot [see 8.1 item b)] and acting on a beam which is free to move in the vertical plane square to the axis of the pipe. For pipes with a diameter equal to or greater than 400 mm, each beam can be elliptically shaped to suit the expected shape of the pipe when deflected as required, see Figure 4. The length of the beam or the curved part of the beam shall be greater than the contact area with the deflected spigot.
Mechanical or hydraulic device, capable of applying the necessary diametric deflection to the socket [see 8.1 item b)] and acting on a beam which is free to move in the vertical plane square to the axis of the socket. The length of the beam or the curved part of the beam shall be greater than the contact area with the deflected socket.
For pipes with a diameter equal to or greater than 400 mm, each beam may be lliptically shaped to suit the expected shape of the socket when deflected as required, see Figure 4.
When there is a risk that the stiffening elements (profiles) of a structured wall pipe or socket will deflect more than 0,1 times the profile height, the clamps shall be modified such that they will come into contact with the pipe wall between the profiles when the profile is deflected to between 0,9 times and 0,95 times the profile height (see Figure 2).ISO 13259 pdf free download.