1, he kohakore: kowiri tira flangehe nui ake te kino o te weld, mena ko te whakamahi i nga tikanga maimoatanga miihini miihini a-ringa ki te hanga, katahi ka pa ki te ahua o nga tohu hurihanga, ka puta mai he ahua koretake;
2, oro me te oro hāngū kore he ōrite:pickling passivation maimoatanga i muri i huri a-ringa me te oro, mo te wāhi workpiece nui, he uaua ki te whakatutuki pānga maimoatanga ōrite, e kore e taea te tiki i te mata kākahu pai. Kei a ia ano te kino o nga utu tangata-haora, he nui ake nga utu taputapu;
3, he uaua te tango i nga rakuraku:pickling passivation whānui, i roto i te aroaro o te reo ha'iriiri ka puta te waikura matū te waikura electrochemical ranei me te waikura, hoki e kore e taea te tango e tika ana ki te rakuraku, fehokotaki'anga pōrutu me te piri ki te mata o te kowiri tira waro maitai, pōrutu me ētahi atu poke;

Na me pehea te whakaoti rapanga okowiri tira flangetukatuka?
1, kowhiria te parakore,i muri i te otinga, ki te tukanga e whai ake nei, he rereke nga mea mahi kowiri tira i runga i nga whakaritenga tukatuka ki roto i te tukanga e rite ana;
2, piko ki te tuatahi i runga i te rahi,kia rite ki te tuhi kowiri 304 matotoru rauemi ngongo maitai ki te whakatau i te piko ki te maripi me te maripi waka, karo hua ki te tapahi tukinga taputapu meinga deformation ko te matua ki te aratau whiriwhiri (i roto i te taua hua, kia whakamahi tauira rerekē o runga mate) , me te kowhiringa o te mate o raro ka whakatauhia i runga i te matotoru o te papa.
3, kia u ai te welding,ki runga ki te wahi mahi fehokotaki'anga ira convex, ka taea te hanga i te fepulopulasi i roto i te mua o te fehokotaki'anga hiko me te paraharaha ōrite whakapā, ki te whakarite i te ōrite o ia wāhi ki te wera, ka taea te whakatau i te tūnga fehokotaki'anga i te wa ano, te hiahia mo te fehokotaki'anga, ki te whakatika te wa i mua i te utaina, te wa pupuri, te pupuri i te waa me te wa okiokinga, kia mau tonu te waahi mahi ka kitea te wea.