GB12459-2005 钢制对焊无缝管件规范

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1、ICS23.040.60.I15西黔中华人民共和国国家标准GB/T12459-2005代替GB/T12459-1990钢制对焊无缝管件Steelbutt-weldingseamlesspipefittings(ASMEB16.9:2001，FACTORY-MADEWROUGHTBUTTWELDINGFITTINGS,MOD)2005-02-21发布2005-08-01实施中华人民共和国国家质量监督检验检疫总局发布中国国家标准化管理委员会GB/T12459-2005目次n....二.:..-..二:..二-;…:目」吕.‘.，-二

2、..…..钾介1范围·········································⋯⋯，................⋯⋯-介.…二‘2规范性引用文件······················⋯⋯‘’“““”‘””““’““”’…-...二-‘朴.‘..二，-二...‘.…-‘二.，户.….‘二3符号与代号·························-········⋯⋯‘⋯⋯‘”’“““‘”‘:.二.︸.……4尺寸与公差·······································

3、·············，··⋯“‘-..二.…二，-..二‘…二-二.5材料··································································⋯⋯，‘….二.:….…二‘‘二..2(2(6制造及热处理·····································⋯⋯‘··⋯“‘”“““..….二.….二。.二..‘‘7检验································································

4、·⋯⋯-.-二.…‘.二.…，二..。.欲炭8设计验证试验······································⋯⋯““‘·‘”“”’..…;二..，.…二.…二..…9产品试验··········································...⋯，....⋯⋯，⋯⋯‘.，二...，-二.二…-.沙尔10标志·····················································..........⋯⋯...。二.，.‘..二‘二.…n防护与包装···

5、········································⋯⋯‘⋯⋯’“’…..‘.二-…..‘，二..‘二-…双乳12产品质量合格证明书································，·······.·⋯⋯-…，-二.-‘….…︸..:二….附录A(资料性附录)钢制对焊无缝管件英制尺寸表··⋯⋯:‘:二-::‘二--二‘‘肛盯附录B(资料性附录)与管件连接的无缝钢管壁厚分级表二..二.二..GB/T12459-2005o1舀本标准是GB/T12459-1990(钢制对焊无缝管件》的修订版

6、。本标准修改采用ASMEB16.9:2001《工厂制造的锻钢对焊管件》，结合国内制造情况，在参照原标准的基础上进行编制。本标准与ASMEBl6.9:2001的主要异同:—型式(无缝)、尺寸(DN800及其以下)和技术要求与ASMEBl6.9基本一致，编写格式不同。—在原标准的基础上增加了我国常用的与“米制管”连接的管件焊接端部尺寸，即“1系列”尺寸;—个别规格“坡口处外径”的小数位与ASMEB16.9略有差异，例如DN20管件“坡口处外径”:ASMEB16.9为“26.7mm"，本标准为“26.9mm".—增加了管件的符号与代号

7、、材料、制造及热处理、检验、防护与包装、产品质量合格证明书等技术内容。本标准与GB/T12459-1990相比主要变化如下:—增加了管件的符号说明;—按ASMEB16.9，增加了法兰连接用的翻边短节尺寸;—扩大了尺寸范围，由原来的DN15--DN500扩大到DN15^DN800。其中长半径弯头、三通、四通、管帽和异径接头的尺寸由DN15-DN500扩大到DNl5~DN800，其他管件尺寸由DN15-DN500扩大到DN15-DN6000—增加了材料及制造工艺要求，补充了设计验证要求，修改了检验等技术内容本标准的附录A和附录B都是

8、资料性附录本标准由中国机械工业联合会提出。本标准由全国管路附件标准化技术委员会归口。本标准起草单位:机械科学研究院、无锡市新峰管业有限公司、沧州渤海管件有限公司、江阴市南方管件制造有限公司、上海高桥管件有限公司、天津金鼎管道有限公司、江阴金童石化管件有限公司、江