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<p class="MsoNormal"><span lang="EN-GB" style="mso-ansi-language: EN-GB;">This test method determines the slow crack growth (SCG) behaviour (also known as the stress crack resistance) of polyethylene (PE) materials, incorporating recyclates, used in structured-wall Type B corrugated pipes (ISO 21138-3) for non-pressure gravity flow drainage applications. The test method is appropriate to post-consumer recyclates (PCR) of PE materials, post-industrial recyclates (PIR) of PE materials, and blends of such materials with virgin and/or reworked PE , respectively. The test method can also be used for Types A1 and A2 pipe (ISO 21138-2) materials. </span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-ansi-language: EN-GB;">The test method is conducted on un-notched specimens in deionized water and evaluates the time until brittle failure, which is governed by both the crack initiation and crack propagation phases of the SCG mechanism.</span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-ansi-language: EN-GB;">The test method utilizes standard testing equipment utilized for other stress crack tests in the drainage pipe industry. Specifically, the test method utilizes a lever-arm loading mechanism, typically with a 5:1 mechanical advantage, to apply a constant load to a dog-bone shaped test specimen immersed in an elevated temperature water bath.</span></p>
Reģistrācijas numurs (WIID)
89809
Darbības sfēra
<p class="MsoNormal"><span lang="EN-GB" style="mso-ansi-language: EN-GB;">This test method determines the slow crack growth (SCG) behaviour (also known as the stress crack resistance) of polyethylene (PE) materials, incorporating recyclates, used in structured-wall Type B corrugated pipes (ISO 21138-3) for non-pressure gravity flow drainage applications. The test method is appropriate to post-consumer recyclates (PCR) of PE materials, post-industrial recyclates (PIR) of PE materials, and blends of such materials with virgin and/or reworked PE , respectively. The test method can also be used for Types A1 and A2 pipe (ISO 21138-2) materials. </span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-ansi-language: EN-GB;">The test method is conducted on un-notched specimens in deionized water and evaluates the time until brittle failure, which is governed by both the crack initiation and crack propagation phases of the SCG mechanism.</span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-ansi-language: EN-GB;">The test method utilizes standard testing equipment utilized for other stress crack tests in the drainage pipe industry. Specifically, the test method utilizes a lever-arm loading mechanism, typically with a 5:1 mechanical advantage, to apply a constant load to a dog-bone shaped test specimen immersed in an elevated temperature water bath.</span></p>
