ISO/TC 138/SC 4/WG 3

Projekta Nr.ISO 4437-2:2024
Nosaukums<p class="MsoBodyText"><span lang="EN-GB">This document specifies the characteristics of pipes made from polyethylene (PE) 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 4437-3, 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 MOPs and gives requirements concerning colours.</span></p> <p class="MsoBodyText"><span lang="EN-GB">This document is applicable to three types of pipes:</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">PE pipes (outside diameter, <em style="mso-bidi-font-style: normal;">d</em><sub>n</sub>) including any identification stripes;</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">PE pipes with co-extruded layers on either or both the outside and/or inside of the pipe (total outside diameter, <em style="mso-bidi-font-style: normal;">d</em><sub>n</sub>) as specified in Annex A, where all PE layers have the same MRS rating;</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">PE pipes (outside diameter, <em style="mso-bidi-font-style: normal;">d</em><sub>n</sub>) with a peelable and contiguous thermoplastics additional layer on the outside of the pipe ("coated pipe") as specified in Annex B.</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> <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)79722
Darbības sfēra<p class="MsoBodyText"><span lang="EN-GB">This document specifies the characteristics of pipes made from polyethylene (PE) 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 4437-3, 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 MOPs and gives requirements concerning colours.</span></p> <p class="MsoBodyText"><span lang="EN-GB">This document is applicable to three types of pipes:</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">PE pipes (outside diameter, <em style="mso-bidi-font-style: normal;">d</em><sub>n</sub>) including any identification stripes;</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">PE pipes with co-extruded layers on either or both the outside and/or inside of the pipe (total outside diameter, <em style="mso-bidi-font-style: normal;">d</em><sub>n</sub>) as specified in Annex A, where all PE layers have the same MRS rating;</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">PE pipes (outside diameter, <em style="mso-bidi-font-style: normal;">d</em><sub>n</sub>) with a peelable and contiguous thermoplastics additional layer on the outside of the pipe ("coated pipe") as specified in Annex B.</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> <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