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1、J16備案號:8373-2001EIL中華人民共和國電力行業(yè)標準DL/T746一2001電站蝶閥選用導則Guideonselectionofbutterflyvalvesforpowerplant2001一02一12發(fā)布2001一07一01實施中華人民共和國國家經濟貿易委員會發(fā)布L幾汀，山6-21犯前言本標準是根據原電力工業(yè)部19%年電力行業(yè)標準計劃項目(技綜〔1996]40號文)的安排制定的。蝶閥作為電站、熱電廠供水、蒸汽、空氣管路系統(tǒng)(特別是冷卻循環(huán)水系統(tǒng))的截流、密封和在一定范圍內調節(jié)流量作用的設備，已被越來越廣泛地采用。本標準是根據電站的
2、生產發(fā)展對蝶閥的不斷需要而制定的，規(guī)定了電站蝶閥選用的基本原則，是有關設計院、電廠、生產、施工建設等單位選用蝶閥的技術依據。本標準的附錄A、附錄B是提示的附錄。本標準由電力行業(yè)電站閥門標準化技術委員會提出并歸口。本標準起草單位:長沙閥門廠、沙市閥門總廠、鄭州市上街蝶閥廠。本標準主要起草人:劉普成、謝躍龍、余芳、張云海、季桂芳、許林波。本標準由電力行業(yè)電站閥門標準化技術委員會負責解釋。DL/T746-2001目次前言1范圍·····································，··························
3、···················，·····························??12引用標準·······，·········································，································4················一13蝶閥種類及結構形式···············，···········，···········，?！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ぁぁぁぁぁぁぁぁぁぁ??！?.??。14型號和參數······
4、···································································································一35技術要求·，·，，，·‘?！ぁぁぃ?，‘··，，，···，，，，·····，，，，，·······，，，········，，，，······，，，.................···一46檢驗規(guī)則·······?！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?/p>
5、···，···，·························??87訂貨·······················，···············，······，···········，·····················································一98標志及供貨····，········，·，···········，···········，····················，··································，········??9附錄A(提示的附錄)
6、閥體最小壁厚的計算·································································??11附錄B(提示的附錄)液控止回蝶閥可調整的開閉時間及角行程····················，·········，·??11中華人民共和國電力行業(yè)標準電站蝶閥選用導則D1丫T746-2001Guideonselectionofbutterflyvalvesforpower川.川范圍本標準規(guī)定了電站蝶閥的選用原則。本標準適用于火電廠供水、蒸汽、空氣(包括弱腐蝕性流體、兩相流體)管路系統(tǒng)上公稱
7、壓力(PN)為0.05MPa-5.OMPa，公稱通徑(DN)為50mm-4000mm的蝶閥。2引用標準下列標準所包含的條文，通過在本標準中引用而構成為本標準的條文。本標準出版時，所示版本均為有效。所有標準都會被修訂，使用本標準的各方應探討使用下列標準最新版本的可能性。GB150-1998鋼制壓力容器GB/T1047-1995管道元件的公稱通徑GB/T1048-1990管道元件公稱壓力GB/T1184-19%形狀和位置公差未注公差值GB/T1771-1991色漆和清漆耐中性鹽霧性能的測定GB/T9113.1一9113.26-1988整體鋼制管法蘭G
8、B/T9115.1-9115.36-1988對焊鋼制管法蘭GB/T9131-1988鋼制管法蘭壓力一溫度等級GB/T12220-1989
