GB/T 3091 "Welded steel pipe for low pressure fluid transportation" (2015 version of the standard version) yavomerezedwa ndi National Standardization Committee ndipo inatulutsidwa mwalamulo, kuyambira June 01, 2016 kukhazikitsidwa kovomerezeka;Nthawi yomweyo, mtundu wamba wa GB/T 3091-2008 ndiwosavomerezeka!
Kutanthauzira kwa zofunikira za National Standard Standard:
1. Kulemera kwagalasi - "Mzere wapansi"
Mu dziko latsopano muyezo, pa nthaka wosanjikiza kulemera index wa kanasonkhezereka zitsulo chitoliro kwa nthawi yoyamba kuika patsogolo "zofunika zapansi"!Ndiko kuti: mu Baibulo lakale la muyezo yekha "kukambitsirana mawu" pamaziko a kuchuluka "chitoliro zitsulo mkati ndi kunja pamwamba kanasonkhezereka wosanjikiza unit dera kulemera okwana sayenera zosakwana 300g/m²" kuvomerezedwa zofunika muyezo.
Zotsatira zake, moyo wapakati wa chitoliro chachitsulo umakulitsidwa ndi osachepera 30% !!
2. Kutha kwa chitoliro
Mapaipi achitsulo okhala ndi m'mimba mwake osapitilira 114.3mm( mainchesi 4 kapena kuchepera) ayenera kukhala athyathyathya mwamakina (popanda ma burrs kumapeto).
3. Konzani kuwotcherera kwa zolakwika
Pambuyo kukonzanso kwa muyezo watsopano, kukonza zolakwika kumasinthidwa kukhala: chitoliro chowongoka chamagetsi chowotcherera chachitsulo chokhala ndi m'mimba mwake wakunja wosakwana 219.1mm sikuloledwa kukonza kuwotcherera.
Kuyerekeza: GB/T3091-2008 limati "chitoliro zitsulo ndi awiri akunja osapitirira 114.3mm saloledwa kukonza kuwotcherera, zitsulo chitoliro ndi awiri akunja osachepera 114.3mm, akhoza kukonza zolakwika m'munsi zitsulo ndi kuwotcherera."
4. Khoma makulidwe
Muyezo watsopano umanena za mtengo wocheperako wa makulidwe a khoma la chitoliro chachitsulo, ndiko kuti, Table 1 "M'mimba mwake mwadzina, m'mimba mwake, makulidwe a Nominal Wall ndi uncircularity wa Chitoliro chachitsulo chokhala ndi m'mimba mwake osaposa 219.1mm", yomwe imapereka maziko achindunji pakupanga ndi kusankha kwa zida zamagawo opangira uinjiniya.
Ø Chitoliro chachitsulo chokhala ndi makulidwe ocheperako kuposa ** yaying'ono sichiloledwa kupanga GB/T3091-2015 muyezo !!
5. Chizindikiro cha chitoliro chachitsulo
Muyezo watsopanowu umati: "Kuyika chizindikiro kwa mapaipi achitsulo kuphatikizepo izi: dzina la wopanga kapena chizindikiro chake, nambala yokhazikika yazinthu, nambala yachitsulo yachitsulo, mawonekedwe azinthu ndi nambala yozindikiritsa."
Chizindikiro chachitsulo chachitsulo chimakhala ndi chizindikiro cha mankhwala ndi code ya thupi la chitoliro.Ngati zina mwazomwe zili pamwambazi zikusowa, ndizoletsedwa.
Nthawi yotumiza: Jul-09-2022