ISO/TC 138/SC 4/WG 3

Projekta Nr.ISO 4437-3:2024
Nosaukums<p class="MsoBodyText"><span lang="EN-GB">This document specifies the characteristics of fusion fittings made from polyethylene (PE) as well as of mechanical fittings for piping systems in the field of the supply of gaseous fuels.</span></p> <p class="MsoBodyText"><span lang="EN-GB">It also specifies the test parameters for the test methods referred to in this document.</span></p> <p class="MsoBodyText"><span lang="EN-GB">In conjunction with ISO 4437-1, ISO 4437-2, ISO 4437-4 and ISO 4437-5, this document is applicable to PE pipes, fittings and valves, their joints, and joints with components of PE and other materials intended to be used under the following conditions:</span></p> <p class="ListNumber1" style="mso-list: l1 level1 lfo2;"><!-- [if !supportLists]--><span lang="EN-GB" style="mso-fareast-font-family: Cambria; mso-bidi-font-family: Cambria;"><span style="mso-list: Ignore;">a)<span style="font: 7.0pt 'Times New Roman';">       </span></span></span><!--[endif]--><span lang="EN-GB">a maximum operating pressure (MOP), up to and including 10 bar</span><span class="MsoFootnoteReference"><span lang="EN-GB" style="font-size: 10.0pt; mso-bidi-font-size: 11.0pt;"><span style="mso-special-character: footnote;"><!-- [if !supportFootnotes]--><span lang="EN-GB" style="font-size: 10.0pt; mso-bidi-font-size: 11.0pt; mso-fareast-font-family: Calibri; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">[1]</span><!--[endif]--></span></span></span><span lang="EN-GB">, at a reference temperature of 20 °C for design purposes;</span></p> <p class="ListNumber1" style="mso-list: l1 level1 lfo2;"><!-- [if !supportLists]--><span lang="EN-GB" style="mso-fareast-font-family: Cambria; mso-bidi-font-family: Cambria;"><span style="mso-list: Ignore;">b)<span style="font: 7.0pt 'Times New Roman';">       </span></span></span><!--[endif]--><span lang="EN-GB">an operating temperature between −20 °C and 40 °C.</span></p> <p class="MsoBodyText"><span lang="EN-GB">For operating temperatures between 20 °C and 40 °C, derating coefficients are defined in ISO 4437-5.</span></p> <p class="MsoBodyText"><span lang="EN-GB">The ISO 4437 series covers a range of maximum operating pressures and gives requirements concerning colours.</span></p> <p class="MsoBodyText"><span lang="EN-GB">It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national regulations and installation practices or codes.</span></p> <p class="MsoBodyText"><span lang="EN-GB">This document is applicable for fittings of the following types:</span></p> <p class="ListContinue1" style="mso-list: l0 level1 lfo1;"><!-- [if !supportLists]--><span lang="EN-GB" style="mso-fareast-font-family: Cambria; mso-bidi-font-family: Cambria;"><span style="mso-list: Ignore;">—<span style="font: 7.0pt 'Times New Roman';">     </span></span></span><!--[endif]--><span lang="EN-GB">electrofusion socket fittings;</span></p> <p class="ListContinue1" style="mso-list: l0 level1 lfo1;"><!-- [if !supportLists]--><span lang="EN-GB" style="mso-fareast-font-family: Cambria; mso-bidi-font-family: Cambria;"><span style="mso-list: Ignore;">—<span style="font: 7.0pt 'Times New Roman';">     </span></span></span><!--[endif]--><span lang="EN-GB">electrofusion saddle fittings;</span></p> <p class="ListContinue1" style="mso-list: l0 level1 lfo1;"><!-- [if !supportLists]--><span lang="EN-GB" style="mso-fareast-font-family: Cambria; mso-bidi-font-family: Cambria;"><span style="mso-list: Ignore;">—<span style="font: 7.0pt 'Times New Roman';">     </span></span></span><!--[endif]--><span lang="EN-GB">spigot end fittings (for butt fusion using heated tools and electrofusion socket fusion);</span></p> <p class="ListContinue1" style="mso-list: l0 level1 lfo1;"><!-- [if !supportLists]--><span lang="EN-GB" style="mso-fareast-font-family: Cambria; mso-bidi-font-family: Cambria;"><span style="mso-list: Ignore;">—<span style="font: 7.0pt 'Times New Roman';">     </span></span></span><!--[endif]--><span lang="EN-GB">socket fusion fittings;</span></p> <p class="ListContinue1" style="mso-list: l0 level1 lfo1;"><!-- [if !supportLists]--><span lang="EN-GB" style="mso-fareast-font-family: Cambria; mso-bidi-font-family: Cambria;"><span style="mso-list: Ignore;">—<span style="font: 7.0pt 'Times New Roman';">     </span></span></span><!--[endif]--><span lang="EN-GB">mechanical fittings.</span></p> <p class="Note"><span lang="EN-GB">NOTE 1<span style="mso-tab-count: 1;">        </span>The fittings can be, for example, in the form of couplers, saddles, equal and reduced tees, reducers, elbows, bends or end caps.</span></p> <p class="Note"><span lang="EN-GB">NOTE 2<span style="mso-tab-count: 1;">        </span>Fabricated fittings are normally not used for gas applications except for larger dimensions or in the absence of other solutions. Guidance can be found in ISO 4427-3:2019, Annex B.</span></p> <div style="mso-element: footnote-list;"><!--[endif]--> <div id="ftn1" style="mso-element: footnote;"> <p class="MsoFootnoteText"><span class="MsoFootnoteReference"><span lang="EN-GB"><span style="mso-special-character: footnote;"><!-- [if !supportFootnotes]--><span lang="EN-GB" style="font-size: 10.0pt; mso-bidi-font-size: 11.0pt; mso-fareast-font-family: Calibri; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">[1]</span><!--[endif]--></span></span></span><span lang="EN-GB"><span style="mso-spacerun: yes;">  </span>1 bar = 0,1 MPa = 10<sup>5</sup> Pa; 1 MPa = 1 N/mm<sup>2</sup>.</span></p> </div> </div>
Reģistrācijas numurs (WIID)79723
Darbības sfēra<p class="MsoBodyText"><span lang="EN-GB">This document specifies the characteristics of fusion fittings made from polyethylene (PE) as well as of mechanical fittings for piping systems in the field of the supply of gaseous fuels.</span></p> <p class="MsoBodyText"><span lang="EN-GB">It also specifies the test parameters for the test methods referred to in this document.</span></p> <p class="MsoBodyText"><span lang="EN-GB">In conjunction with ISO 4437-1, ISO 4437-2, ISO 4437-4 and ISO 4437-5, this document is applicable to PE pipes, fittings and valves, their joints, and joints with components of PE and other materials intended to be used under the following conditions:</span></p> <p class="ListNumber1" style="mso-list: l1 level1 lfo2;"><!-- [if !supportLists]--><span lang="EN-GB" style="mso-fareast-font-family: Cambria; mso-bidi-font-family: Cambria;"><span style="mso-list: Ignore;">a)<span style="font: 7.0pt 'Times New Roman';">       </span></span></span><!--[endif]--><span lang="EN-GB">a maximum operating pressure (MOP), up to and including 10 bar</span><span class="MsoFootnoteReference"><span lang="EN-GB" style="font-size: 10.0pt; mso-bidi-font-size: 11.0pt;"><span style="mso-special-character: footnote;"><!-- [if !supportFootnotes]--><span lang="EN-GB" style="font-size: 10.0pt; mso-bidi-font-size: 11.0pt; mso-fareast-font-family: Calibri; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">[1]</span><!--[endif]--></span></span></span><span lang="EN-GB">, at a reference temperature of 20 °C for design purposes;</span></p> <p class="ListNumber1" style="mso-list: l1 level1 lfo2;"><!-- [if !supportLists]--><span lang="EN-GB" style="mso-fareast-font-family: Cambria; mso-bidi-font-family: Cambria;"><span style="mso-list: Ignore;">b)<span style="font: 7.0pt 'Times New Roman';">       </span></span></span><!--[endif]--><span lang="EN-GB">an operating temperature between −20 °C and 40 °C.</span></p> <p class="MsoBodyText"><span lang="EN-GB">For operating temperatures between 20 °C and 40 °C, derating coefficients are defined in ISO 4437-5.</span></p> <p class="MsoBodyText"><span lang="EN-GB">The ISO 4437 series covers a range of maximum operating pressures and gives requirements concerning colours.</span></p> <p class="MsoBodyText"><span lang="EN-GB">It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national regulations and installation practices or codes.</span></p> <p class="MsoBodyText"><span lang="EN-GB">This document is applicable for fittings of the following types:</span></p> <p class="ListContinue1" style="mso-list: l0 level1 lfo1;"><!-- [if !supportLists]--><span lang="EN-GB" style="mso-fareast-font-family: Cambria; mso-bidi-font-family: Cambria;"><span style="mso-list: Ignore;">—<span style="font: 7.0pt 'Times New Roman';">     </span></span></span><!--[endif]--><span lang="EN-GB">electrofusion socket fittings;</span></p> <p class="ListContinue1" style="mso-list: l0 level1 lfo1;"><!-- [if !supportLists]--><span lang="EN-GB" style="mso-fareast-font-family: Cambria; mso-bidi-font-family: Cambria;"><span style="mso-list: Ignore;">—<span style="font: 7.0pt 'Times New Roman';">     </span></span></span><!--[endif]--><span lang="EN-GB">electrofusion saddle fittings;</span></p> <p class="ListContinue1" style="mso-list: l0 level1 lfo1;"><!-- [if !supportLists]--><span lang="EN-GB" style="mso-fareast-font-family: Cambria; mso-bidi-font-family: Cambria;"><span style="mso-list: Ignore;">—<span style="font: 7.0pt 'Times New Roman';">     </span></span></span><!--[endif]--><span lang="EN-GB">spigot end fittings (for butt fusion using heated tools and electrofusion socket fusion);</span></p> <p class="ListContinue1" style="mso-list: l0 level1 lfo1;"><!-- [if !supportLists]--><span lang="EN-GB" style="mso-fareast-font-family: Cambria; mso-bidi-font-family: Cambria;"><span style="mso-list: Ignore;">—<span style="font: 7.0pt 'Times New Roman';">     </span></span></span><!--[endif]--><span lang="EN-GB">socket fusion fittings;</span></p> <p class="ListContinue1" style="mso-list: l0 level1 lfo1;"><!-- [if !supportLists]--><span lang="EN-GB" style="mso-fareast-font-family: Cambria; mso-bidi-font-family: Cambria;"><span style="mso-list: Ignore;">—<span style="font: 7.0pt 'Times New Roman';">     </span></span></span><!--[endif]--><span lang="EN-GB">mechanical fittings.</span></p> <p class="Note"><span lang="EN-GB">NOTE 1<span style="mso-tab-count: 1;">        </span>The fittings can be, for example, in the form of couplers, saddles, equal and reduced tees, reducers, elbows, bends or end caps.</span></p> <p class="Note"><span lang="EN-GB">NOTE 2<span style="mso-tab-count: 1;">        </span>Fabricated fittings are normally not used for gas applications except for larger dimensions or in the absence of other solutions. Guidance can be found in ISO 4427-3:2019, Annex B.</span></p> <div style="mso-element: footnote-list;"><!--[endif]--> <div id="ftn1" style="mso-element: footnote;"> <p class="MsoFootnoteText"><span class="MsoFootnoteReference"><span lang="EN-GB"><span style="mso-special-character: footnote;"><!-- [if !supportFootnotes]--><span lang="EN-GB" style="font-size: 10.0pt; mso-bidi-font-size: 11.0pt; mso-fareast-font-family: Calibri; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">[1]</span><!--[endif]--></span></span></span><span lang="EN-GB"><span style="mso-spacerun: yes;">  </span>1 bar = 0,1 MPa = 10<sup>5</sup> Pa; 1 MPa = 1 N/mm<sup>2</sup>.</span></p> </div> </div>
StatussStandarts spēkā
ICS grupa75.200
83.140.30