GBT3287-2000 可锻铸铁管路连接件.pdf

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1、23.040.60I1C1S5(G8中华人民共和国国家标准GB/T3287-2000eqvISO49:1994可锻铸铁管路连接件Malleablecastironpipefittings2000一11一21发布2001一05一01实施国家质董轰技术监督局发布Gs/T3287-2000目次前言···························································································。················⋯⋯工ISO前言···。·········。·············。

2、········································································⋯⋯I1范围·········································································································⋯⋯12引用标准····································································。·。········。···················

3、⋯⋯13定义······。·······。······。。·······。······。。·································································⋯⋯14产品分类·····················································，············································⋯⋯35技术要求·················································。··············。·

4、··········。·······················一66试验方法........................·······。··································································⋯⋯97检验规则········································。·························。·。········，····················⋯⋯n8管件尺寸和安装长度—通则···············。。··。······。··

5、···。·······································⋯⋯129标志、包装、运输、贮存·......................................................................................12附录A(标准的附录)管路连接件型式尺寸······································..·..·..·..·.......⋯⋯13GB/T3287-2000前言本标准是根据国际标准ISO49:1994《按ISO7-1加工螺纹的可锻铸铁管路连接件》对GB/

6、T3287-1982《可锻铸铁管路连接件技术条件》,GB/T3288-1982《可锻铸铁管路连接件验收规则》,GB/T3289.1^3289.39-1982《可锻铸铁管路连接件型式尺寸》进行的修订。本标准等效采用国际标准ISO49:1994《按ISO7-1加工螺纹的可锻铸铁管路连接件》标准编写结构和格式按照GB/T1.1-1993《标准化工作导则第1单元:标准的起草与表述规则第1部分;标准编写的基本规定》。本标准与GB/T3287-1982,GB/T3288-1982,GB/T3289.1-3289.39-1982相比主要变化如下:1将GB/T3287-1982,GB/T3

7、288-1982,GB/T3289.1^3289.39-1982标准合并为一个标准;2.增加了产品分类和标记;3.增加了密封性与设计的试验压力要求;4取消了原标准中的胀裂试验;5.本标准中管件螺纹轴线夹角450,900,1800的偏差不超过士0.50,6.本标准管件螺纹应符合GB/T7306.1-2000050密封管螺纹第1部分:圆柱内螺纹与圆锥外螺纹》及GB/T7306.2-2000(55。密封管螺纹第2部分:回锥内螺纹与圆锥外螺纹》的规定，外螺纹为圆锥形(R)，内螺纹可以是圆柱形(Rp)或圆锥形(R}),本标准