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1、23.040.60I1C1S5(G8中華人民共和國(guó)國(guó)家標(biāo)準(zhǔn)GB/T3287-2000eqvISO49:1994可鍛鑄鐵管路連接件Malleablecastironpipefittings2000一11一21發(fā)布2001一05一01實(shí)施國(guó)家質(zhì)董轟技術(shù)監(jiān)督局發(fā)布Gs/T3287-2000目次前言···························································································?！ぁぁぁぁぁぁぁぁぁぁぁぁぁぁぁ??工ISO前言···?！ぁぁぁぁぁぁぁぁぁ！ぁぁぁぁぁぁぁぁぁぁ?/p>
2、··。········································································??I1范圍·········································································································??12引用標(biāo)準(zhǔn)····································································?！ぁ！ぁぁぁぁぁぁぁぁ！ぁぁぁぁぁぁぁぁぁぁぁぁ?/p>
3、······??13定義······?！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ぁぁぁぁ??14產(chǎn)品分類·····················································，············································??35技術(shù)要求·················································?！ぁぁぁぁぁぁ?/p>
4、·······。···········。·······················一66試驗(yàn)方法........................·······。··································································??97檢驗(yàn)規(guī)則········································。·························?！ぁ！ぁぁぁぁぁぁぁ?，····················??n8管件尺寸和安裝長(zhǎng)度—通則···············。。
5、··。······。·····?！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??129標(biāo)志、包裝、運(yùn)輸、貯存·......................................................................................12附錄A(標(biāo)準(zhǔn)的附錄)管路連接件型式尺寸······································..·..·..·..·.......??13GB/T3287-2000前言本標(biāo)準(zhǔn)是根據(jù)國(guó)際標(biāo)準(zhǔn)ISO49:1994《按ISO7-1加工螺紋
6、的可鍛鑄鐵管路連接件》對(duì)GB/T3287-1982《可鍛鑄鐵管路連接件技術(shù)條件》,GB/T3288-1982《可鍛鑄鐵管路連接件驗(yàn)收規(guī)則》,GB/T3289.1^3289.39-1982《可鍛鑄鐵管路連接件型式尺寸》進(jìn)行的修訂。本標(biāo)準(zhǔn)等效采用國(guó)際標(biāo)準(zhǔn)ISO49:1994《按ISO7-1加工螺紋的可鍛鑄鐵管路連接件》標(biāo)準(zhǔn)編寫結(jié)構(gòu)和格式按照GB/T1.1-1993《標(biāo)準(zhǔn)化工作導(dǎo)則第1單元:標(biāo)準(zhǔn)的起草與表述規(guī)則第1部分;標(biāo)準(zhǔn)編寫的基本規(guī)定》。本標(biāo)準(zhǔn)與GB/T3287-1982,GB/T3288-1982,GB/T3289.1-3289.39-1982相比主要變化如下:1將G
7、B/T3287-1982,GB/T3288-1982,GB/T3289.1^3289.39-1982標(biāo)準(zhǔn)合并為一個(gè)標(biāo)準(zhǔn);2.增加了產(chǎn)品分類和標(biāo)記;3.增加了密封性與設(shè)計(jì)的試驗(yàn)壓力要求;4取消了原標(biāo)準(zhǔn)中的脹裂試驗(yàn);5.本標(biāo)準(zhǔn)中管件螺紋軸線夾角450,900,1800的偏差不超過士0.50,6.本標(biāo)準(zhǔn)管件螺紋應(yīng)符合GB/T7306.1-2000050密封管螺紋第1部分:圓柱內(nèi)螺紋與圓錐外螺紋》及GB/T7306.2-2000(55。密封管螺紋第2部分:回錐內(nèi)螺紋與圓錐外螺紋》的規(guī)定，外螺紋為圓錐形(R)，內(nèi)螺紋可以是圓柱形(Rp)或圓錐形(R}),本標(biāo)準(zhǔn)
