Igwe anaghị agba nchara welded ọkpọkọ, nke e zoro aka na ya dị ka welded ọkpọkọ, e ji mara nkenke nkenke, ọkpụrụkpụ mgbidi edo edo, nchapụta dị elu n'ime na n'èzí ọkpọkọ ahụ, enwere ike ikpebi ya.Enwere ike kewaa teknụzụ ịgbado ọkụ n'ime ịgbado ọkụ akpaka na ịgbado ọkụ n'aka.GB/T12770-2002 bụ tumadi eji maka igwe, ụgbọala, ịnyịnya ígwè, arịa ụlọ, mma nke hotels na ụlọ oriri na ọṅụṅụ na ndị ọzọ n'ibu akụkụ.GB/T12771-2008, tumadi eji maka ibuga obere nrụgide corrosive ọkara.N'ọtụtụ ebe, a na-eji ọkpọkọ na-edochi ọkpọkọ ígwè na-enweghị ihe ọ bụla site na ọkpọkọ, ọkpọkọ ndị a na-achọ mma, ọkpọkọ mmiri na-agba ọsọ na obere nrụgide, wdg, karịsịa maka ngwá ọrụ mgbanwe okpomọkụ.