China motsogozedwa kukonzanso miyezo mayiko m'munda wa mbale zitsulo ndi n'kupanga lofalitsidwa mwalamulo

Muyezowu udakonzedwa kuti uunikidwenso mu 2022 pamsonkhano wapachaka wa ISO/TC17/SC12 Steel/Continuous Rolled Flat Products Sub-Committee, ndipo unakhazikitsidwa mwalamulo mu Marichi 2023. Gulu lolemba ntchito lidatenga zaka ziwiri ndi theka, pomwe msonkhano wa gulu limodzi ndi misonkhano iwiri yapachaka idachitika pazokambirana zazikulu, komanso mu Epulo 20, kukonzanso kwa ISO 2023 4997:2025 "Structural Grade Cold Rolled Carbon Thin Steel Plate" idalowetsedwa.

Muyezowu ndi kuunikanso kwapadziko lonse lapansi motsogozedwa ndi China dziko la China litatenga upampando wa ISO/TC17/SC12. Kutulutsidwa kwa ISO 4997:2025 ndichinthu chinanso chochita nawo China pantchito yokhazikika yapadziko lonse lapansi pantchito yazitsulo ndi mizere pambuyo pa ISO 8353:2024.

Mpweya structural zitsulo ozizira adagulung'undisa zitsulo mbale ndi Mzere mankhwala adzipereka kuwongolera mphamvu ndi kuchepetsa makulidwe, potero kuchepetsa kulemera kwa zinthu mapeto, kukwaniritsa cholinga chachikulu cha kupulumutsa mphamvu ndi kuchepetsa umuna, ndi kuzindikira mfundo yopanga "zitsulo zobiriwira". Mtundu wa 2015 wazomwe zimagwiritsidwa ntchito kwambiri pamsika zamphamvu zokolola za 280MPa zitsulo sizinatchulidwe. Kuphatikiza apo, zomwe zili muukadaulo wazomwezo, monga kuuma kwapamtunda ndi kulemera kwa batch, sizimakwaniritsa zosowa zenizeni zakupanga kwamakono. Pofuna kupititsa patsogolo kugwiritsidwa ntchito kwa muyezo, bungwe la Metallurgical Industry Information Standards Research Institute linakonza bungwe la Anshan Iron & Steel Co. Pakukonzanso, zofunikira zaukadaulo za kalasi yatsopanoyi zidatsimikizika pokambirana ndi akatswiri ochokera ku Japan, Germany ndi United Kingdom kwanthawi zambiri, kuyesetsa kukwaniritsa zofunikira pakupanga ndi kuyendera m'dziko lililonse ndikukulitsa kuchuluka kwa kugwiritsa ntchito muyezo.