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1、ICS25.160.40J33巧黔中華人民共和國國家標(biāo)準(zhǔn)GB/T3323-2005代替GB/T3323-1987金屬熔化焊焊接接頭射線照相Radiographicexaminationoffusionweldedjointsinmetallicmaterials2005-07-21發(fā)布2006-01-01實(shí)施中華人民共和國國家質(zhì)量監(jiān)督檢驗(yàn)檢疫總局發(fā)布中國國家標(biāo)準(zhǔn)化管理委員會(huì)GB/T3323-2005目次前言·····························································
2、··················································??班1范圍·························································，·····················································??工2規(guī)范性引用文件················································，····················，·············.....
3、········??13術(shù)語、定義和符號(hào)·.....................................................................................................14射線透照技術(shù)分級(jí)···························?！ぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁ?··...........···....??15通則····································
4、·，·········································································??26射線透照技術(shù)······································?！ぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁぃぁぁぁぁぁぁぁぁぁぁぁぁぁ?...·······??37射線照相檢測報(bào)告·······································································
5、···········...······??15附錄A(規(guī)范性附錄)對(duì)接環(huán)焊縫100嚇射線照相的最少曝光次數(shù)·································??16附錄B(規(guī)范性附錄)最低像質(zhì)計(jì)數(shù)值·..........................................................................21附錄C(資料性附錄)焊接接頭射線照相缺陷評(píng)定·····················································??28附錄
6、D(資料性附錄)像質(zhì)計(jì)型式及規(guī)格···································，····························??31附錄E(資料性附錄)膠片系統(tǒng)分類·························，··············.·...........??，......??36GB/T3323-2005月叨呂本標(biāo)準(zhǔn)是對(duì)GB/T3323-1987((鋼熔化焊對(duì)接接頭射線照相和質(zhì)量分級(jí)》進(jìn)行的修訂。本標(biāo)準(zhǔn)在修訂時(shí)修改采用了歐洲標(biāo)準(zhǔn)EN1435((焊縫的無損檢測熔化焊縫射線照相》
7、。為了保證標(biāo)準(zhǔn)的適用性及協(xié)調(diào)性，本標(biāo)準(zhǔn)在修改采用過程中，對(duì)引用標(biāo)準(zhǔn)做了必要的處理。本標(biāo)準(zhǔn)與EN1435((焊縫的無損檢測熔化焊縫射線照相》標(biāo)準(zhǔn)的主要差異有:—本標(biāo)準(zhǔn)以資料性附錄的形式規(guī)定了焊接接頭質(zhì)量分級(jí)，而EN1435標(biāo)準(zhǔn)無質(zhì)量分級(jí)的規(guī)定—本標(biāo)準(zhǔn)在修訂時(shí)，為保證底片影像質(zhì)量，刪除了EN1435標(biāo)準(zhǔn)中規(guī)定的，在能保證同樣的照相技術(shù)條件且像質(zhì)計(jì)數(shù)值無變化時(shí)，不需在每張底片都放置像質(zhì)計(jì)—本標(biāo)準(zhǔn)對(duì)有延遲裂紋傾向的材料，規(guī)定至少應(yīng)在焊后24h以后進(jìn)行射線照相檢測。與原標(biāo)準(zhǔn)相比，本標(biāo)準(zhǔn)在技術(shù)內(nèi)容方面主要有如下變化:—更側(cè)重射線照相的透照
8、技術(shù)，而將焊接接頭質(zhì)量分級(jí)的有關(guān)規(guī)定放在了附錄C中?！刚占夹g(shù)更注重其合理性和可操作性—在保證缺陷檢出率的同時(shí)，更注重其經(jīng)濟(jì)性。本標(biāo)準(zhǔn)制定于1982年，本次修訂系第二次修訂。本標(biāo)準(zhǔn)自實(shí)施之日起，代替GB/T3323-1987((鋼熔化焊對(duì)接接頭射線照相和質(zhì)量分級(jí)》。本標(biāo)準(zhǔn)由全
