電力建設(shè)施工及驗(yàn)收技術(shù)規(guī)范(火力發(fā)電廠焊接篇)

1、電力建設(shè)施工及驗(yàn)收技術(shù)規(guī)范（火力發(fā)電廠焊接篇）The Code of Erection and Acceptrance for powerPlant Construction Welding SectionDL 5007 92主編部門: 能源電站焊接標(biāo)準(zhǔn)技術(shù)委員會(huì)批準(zhǔn)部門: 中華人民共和國(guó)能源部施行日期:1992 年 9 月 1 日中華人民共和國(guó)能源部關(guān)于頒發(fā)電力建設(shè)施工及驗(yàn)收技術(shù)規(guī)范（ 火力發(fā)電廠焊接篇） 電力行業(yè)標(biāo)準(zhǔn)的通知能源基1991 1015 號(hào)為了適應(yīng)電力工業(yè)焊接技術(shù)的發(fā)展，保證火力發(fā)電廠的安裝質(zhì)量，我部對(duì) 1982 年頒發(fā)的 電力建設(shè)施工及驗(yàn)收技術(shù)規(guī)范 （ 火力發(fā)電廠焊接篇）SDJ

2、 51 82進(jìn)行了修訂，其編號(hào)為DL 5007 92，自1992 年 9 月 1 日起執(zhí)行，原規(guī)范同時(shí)廢止。各單位在執(zhí)行中有什么問(wèn)題請(qǐng)告我部基建司和主編單位。一九九一年十二月三十一日1.0.1本規(guī)范適用于能源工業(yè)電力系統(tǒng)設(shè)計(jì)、制造、安裝和檢修 600 MW及以下火力發(fā)電設(shè)備的鍋爐、承壓管道、壓力容器和鋼結(jié)構(gòu)的焊接工作。1.0.2本規(guī)范適用于碳素鋼（含碳量0 0.35%）、普通低合金鋼和耐熱鋼的手工電弧焊、手工鴇極瀛弧焊、氧-乙煥焊和埋弧自動(dòng)焊等焊接方法。對(duì)其他材料和焊接方法，可參照本規(guī)范和有關(guān)標(biāo)準(zhǔn)制定技術(shù)要求。1.0.3 引進(jìn)國(guó)外火力發(fā)電機(jī)組的施工和驗(yàn)收工作，除建造合同中另有具體規(guī)定的部分外，

3、應(yīng)按本規(guī)范的規(guī)定執(zhí)行。1.0.4 焊縫質(zhì)量檢驗(yàn)根據(jù)部件工況條件和對(duì)質(zhì)量要求分類進(jìn)行評(píng)定。1.0.5 金屬材料檢驗(yàn)、設(shè)備焊口檢查、通球試驗(yàn)、焊接工藝評(píng)定、焊接接頭質(zhì)量檢驗(yàn)、焊接人員考核等項(xiàng)工作，應(yīng)分別按有關(guān)規(guī)程的規(guī)定進(jìn)行。1.0.6 焊接工作（ 焊接、熱處理和金屬檢驗(yàn)） 必須遵守安全、環(huán)保、防火等規(guī)程的有關(guān)規(guī)定。2 焊接人員2.0.1 焊接人員包括焊接技術(shù)人員、焊接質(zhì)量檢查人員、焊接檢驗(yàn)人員、焊工及焊接熱處理人員。2.0.2 各企業(yè)應(yīng)設(shè)置焊接專業(yè)技術(shù)負(fù)責(zé)人和專職焊接質(zhì)量檢查人員。 焊接專業(yè)技術(shù)負(fù)責(zé)人應(yīng)由有一定專業(yè)技術(shù)水平和較豐富實(shí)踐經(jīng)驗(yàn)的工程師（或技師 ） 及以上職務(wù)的焊接技術(shù)人員

4、擔(dān)任，全面負(fù)責(zé)工程焊接技術(shù)和質(zhì)量管理以及焊接人員資格審核等工作。wl cnti nu to .prove t he comia nys itena control sysem, ad seady mprovemet i n ably to manage and cntr, opImZe b-ne pro * to e nsue re sonHi-s i 1a ce； to fut he ste .the era control s, pay a control pos i nde pedent ovslgt r ol e of evautincmpyi ng w* t hidpay reson

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15、稱直徑大于100mm工作壓力大于3.9MPa的汽水管道，尤應(yīng)以機(jī)械方法加工。如用熱加工法(如氣割)下料，切口部分應(yīng)留有加工余量，以除去淬硬層及過(guò)熱金屬。對(duì)淬硬傾向較大的合金鋼材用熱加工法下料后，切口部分應(yīng)先進(jìn)行退火處理再行加工。坡口的制備應(yīng)以機(jī)械加工的方法進(jìn)行。如使用火焰切割切制坡口，則應(yīng)將割口表面的氧化物、熔渣及飛濺物按第4.0.5條的要求清理干凈，并將不平處修理平整。4.0.4焊件經(jīng)下料及坡口加工后按下列要求進(jìn)行檢查，合格后方可進(jìn)行組對(duì)。(1)淬硬性較大的鋼材如使用火焰切割下料坡口，加工后要經(jīng)表面探傷檢驗(yàn)合格。(2)坡口處母材無(wú)裂紋、重皮、坡口損傷及毛刺等缺陷。

16、(3)坡口加工尺寸符合圖樣要求。表4.0.2焊接接頭基本形式及尺寸序號(hào)接頭類型坡口 形式圖形焊接 方法焊 件 厚 度Smm接頭結(jié)寸構(gòu)尺適用范圍a3b mmPmmRmr1I形氣焊電焊埋弧 焊 3 3816121201容 器和 一般 鋼結(jié) 構(gòu)各2對(duì)接V形氣焊電弧焊埋弧 6163035一一131300.52127類承 壓管 子，壓 力容 器和 中、薄焊201件承重結(jié)構(gòu)evescaddis in ete pr deve opmet i n te of ba ckbone bak bone rl e； to ful steghe nig mem bes yut w ok, ul p, yout h-pl

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33、容器 的接 管座 或接 頭12無(wú)坡口電弧 焊 埋弧 焊802不 要全 焊透 的結(jié) 構(gòu)13單V型電弧 焊 埋弧 焊20506002不 要求 焊透 的結(jié) 構(gòu)電弧 焊 埋弧 焊2050601212要 求焊 透的 結(jié)構(gòu)14K形電弧 焊 埋弧 焊2050601212要 求焊 透的 大型 結(jié)構(gòu)15搭接氣焊 電弧焊埋弧焊4801容 器和 結(jié)構(gòu)注： 鴇極瀛弧焊與電弧焊的焊口結(jié)構(gòu)尺寸相同。壁厚小于或等于6mm勺受熱面管子也可只用瀛弧焊打底與蓋面。壁厚大于6mm勺管子可用瀛弧焊打底，電焊蓋面。 封頭的S i值按設(shè)計(jì)規(guī)定；f值可按設(shè)計(jì)規(guī)定，且不小于 20mm搭接尺寸L=5S ,且不小于30mm(4)在第4.0.5條規(guī)定的清理范圍內(nèi)無(wú)裂紋、夾層等缺陷。4.0.5焊件在組裝前應(yīng)將焊口表面及附近母材內(nèi)、外壁的油、漆、垢、銹等清理干凈，直至發(fā)出金屬光澤。清理范圍規(guī)定如下：(1)手工電弧焊對(duì)接焊口：每側(cè)各為1015mm(2)埋弧焊接焊口：每側(cè)各為20mmwl cnti nu to .prove the companys itena control sysem, ad ad，mpro et i n ab