dl／t 746-2001 电站蝶阀选用导则

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1、J16备案号:8373-2001EIL中华人民共和国电力行业标准DL/T746一2001电站蝶阀选用导则Guideonselectionofbutterflyvalvesforpowerplant2001一02一12发布2001一07一01实施中华人民共和国国家经济贸易委员会发布L几汀，山6-21犯前言本标准是根据原电力工业部19%年电力行业标准计划项目(技综〔1996]40号文)的安排制定的。蝶阀作为电站、热电厂供水、蒸汽、空气管路系统(特别是冷却循环水系统)的截流、密封和在一定范围内调节流量作用的设备，已被越来越广泛地采用。本标准是根据电站的

2、生产发展对蝶阀的不断需要而制定的，规定了电站蝶阀选用的基本原则，是有关设计院、电厂、生产、施工建设等单位选用蝶阀的技术依据。本标准的附录A、附录B是提示的附录。本标准由电力行业电站阀门标准化技术委员会提出并归口。本标准起草单位:长沙阀门厂、沙市阀门总厂、郑州市上街蝶阀厂。本标准主要起草人:刘普成、谢跃龙、余芳、张云海、季桂芳、许林波。本标准由电力行业电站阀门标准化技术委员会负责解释。DL/T746-2001目次前言1范围·····································，··························

3、···················，·····························⋯⋯12引用标准·······，·········································，································4················一13蝶阀种类及结构形式···············，···········，···········，。······················，························。·..⋯⋯。14型号和参数······

4、···································································································一35技术要求·，·，，，·‘。···，·，‘··，，，···，，，，·····，，，，，·······，，，········，，，，······，，，.................···一46检验规则·······。···········‘······················································

5、···，···，·························⋯⋯87订货·······················，···············，······，···········，·····················································一98标志及供货····，········，·，···········，···········，····················，··································，········⋯⋯9附录A(提示的附录)

6、阀体最小壁厚的计算·································································⋯⋯11附录B(提示的附录)液控止回蝶阀可调整的开闭时间及角行程····················，·········，·⋯⋯11中华人民共和国电力行业标准电站蝶阀选用导则D1丫T746-2001Guideonselectionofbutterflyvalvesforpower川.川范围本标准规定了电站蝶阀的选用原则。本标准适用于火电厂供水、蒸汽、空气(包括弱腐蚀性流体、两相流体)管路系统上公称

7、压力(PN)为0.05MPa-5.OMPa，公称通径(DN)为50mm-4000mm的蝶阀。2引用标准下列标准所包含的条文，通过在本标准中引用而构成为本标准的条文。本标准出版时，所示版本均为有效。所有标准都会被修订，使用本标准的各方应探讨使用下列标准最新版本的可能性。GB150-1998钢制压力容器GB/T1047-1995管道元件的公称通径GB/T1048-1990管道元件公称压力GB/T1184-19%形状和位置公差未注公差值GB/T1771-1991色漆和清漆耐中性盐雾性能的测定GB/T9113.1一9113.26-1988整体钢制管法兰G

8、B/T9115.1-9115.36-1988对焊钢制管法兰GB/T9131-1988钢制管法兰压力一温度等级GB/T12220-1989