Le présent document spécifie trois pressions d'essai fondamentales pour déterminer l'étanchéité de l'assemblage à bague d'étanchéité en élastomère, pour les systèmes de canalisations thermoplastiques enterrés sans pression.
Le présent document précise trois méthodes d'essai pour vérifier l'étanchéité d'un assemblage à bague d'étanchéité en élastomère. Le présent document est applicable aux canalisations thermoplastiques enterrées sans pression.
<p>This document specifies a test method for determining the leak tightness of elastomeric sealing ring type joints for buried thermoplastics non-pressure piping systems.</p> <p>Unless otherwise specified in the referring standard, the tests are carried out at the following basic test pressures:</p> <p>— <i>p</i><sub>1</sub>: internal negative air pressure (partial vacuum);</p> <p>— <i>p</i><sub>2</sub>: a low internal hydrostatic pressure;</p> <p>— <i>p</i><sub>3</sub>: a higher internal hydrostatic pressure.</p> <p>It also describes the following four test conditions under which the tests are performed:</p> <p>a) Condition A: without any additional diametric or angular deflection;</p> <p>b) Condition B: with diametric deflection;</p> <p>c) Condition C: with angular deflection;</p> <p>d) Condition D: with simultaneous angular and diametric deflection.</p> <p>The applicable selection of the test pressure(s) and the test condition(s) is specified in the referring standard</p>
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