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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="jhryfzg" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shhhjc/637342376075507812/9573497.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="b8egnpr" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>棗莊燃燒性能檢測(cè)廠家,燃燒性能檢測(cè)</p><p><span>***更新：</span>2021-01-12 04:16:49</p><p><span id="click" >瀏覽次數(shù)：2次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="h7qs2oq" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海華慧檢測(cè)技術(shù)有限公司</a></p><p><span>聯(lián)系人：</span>晏閩南</p><p><span>郵箱: </span>yann7873@163.com</p><p><span>電話: </span>19512260464</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span>http://www.cfpo.com.cn</p><p><span>手機(jī): </span>021-69910835</p><p><span>地址: </span>匯善路685號(hào)2幢4層401-410室</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="gev282x" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="bf3prdp" class="box"><p><p style="text-indent:25px">在塑料阻燃性能試驗(yàn)方法中，水平及垂直燃燒試驗(yàn)較具展示性，且應(yīng)用也較為普遍。本法測(cè)定塑料表面火焰?zhèn)鞑バ阅埽湓硐邓交虼怪钡貖A住試樣的一端，對(duì)試樣自由端施加規(guī)定的點(diǎn)燃源，測(cè)定線性燃燒速率（水平法）或有焰燃燒及無焰燃燒時(shí)間（垂直法）等來評(píng)價(jià)試樣的阻燃性能。將試樣水平放置在試樣架上，點(diǎn)燃本生燈，調(diào)節(jié)火焰高度為20mm，使本生燈與水平方向傾斜約45°角。在保持本生燈位置不變的條件下，對(duì)試樣施加火焰30s，撤去本生燈。如果施焰時(shí)間不足30s，火焰前沿已達(dá)到25mm標(biāo)線時(shí)，應(yīng)立即移開本生燈，停止施焰。記錄燃燒前沿從25mm標(biāo)線到燃燒終止時(shí)的燃燒時(shí)間t(單位秒)，并記錄從25mm標(biāo)線到燃燒終止端的燒損長度L(單位毫米)。如果移開點(diǎn)火源后，棗莊燃燒性能檢測(cè)廠家，火焰即滅或燃燒前沿未達(dá)到25mm標(biāo)線，則不計(jì)燃燒時(shí)間、燒損長度和線性燃燒速度，棗莊燃燒性能檢測(cè)廠家。燃燒性能是針對(duì)材料本身特性而言的，棗莊燃燒性能檢測(cè)廠家，材料燃燒性能分為四級(jí)：A級(jí)不燃、B1級(jí)難燃、B2級(jí)可燃、B3級(jí)易燃。棗莊燃燒性能檢測(cè)廠家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="棗莊燃燒性能檢測(cè)廠家,燃燒性能檢測(cè)" src="https://tyunfile.71360.com/UploadFile/shhhjc/637342376075507812/9573497.png"></div><p style="text-indent:25px">物質(zhì)具有的或材料經(jīng)處理后具有的明顯推遲火焰蔓延的性質(zhì)。這在材料使用范圍選擇上起指導(dǎo)作用，特別用于建材、船舶，車輛，家電上的材料要求阻燃性高。目前評(píng)價(jià)阻燃性方法很多，如氧指數(shù)測(cè)定法、水平或垂直燃燒試驗(yàn)法等。B1級(jí)是阻燃級(jí)別的較高級(jí)，在可燃性試驗(yàn)當(dāng)中，邊緣點(diǎn)火開始后的20 秒內(nèi)，火焰尖頭均未達(dá)到試件150mm刻度線；表面點(diǎn)火開始后的20S內(nèi)，火焰尖頭均未到達(dá)試件150mm刻度線。經(jīng)檢測(cè)，實(shí)木材料的阻燃級(jí)別為B2級(jí)，也就是說，多米復(fù)合材料在阻燃性能上遠(yuǎn)高于實(shí)木材質(zhì)。氧指數(shù)高,說明材料燃燒需氧量大,難燃燒，氧指數(shù)小，說明材料易燃燒。西安燃燒性能檢測(cè)靠譜嗎燃燒性能檢測(cè)可以根據(jù)工作需求的不同進(jìn)行轉(zhuǎn)換調(diào)節(jié)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="棗莊燃燒性能檢測(cè)廠家,燃燒性能檢測(cè)" src="https://tyunfile.71360.com/UploadFile/shhhjc/637342376060244140/351381.png"></div><p style="text-indent:25px">阻燃材料燃燒試驗(yàn)的目的在于評(píng)定它的燃燒特性，即是否容易著火、著火后是否延燃，以及是否冒煙和釋放毒氣等。材料阻燃性能的測(cè)試方法。為了研究材料阻燃性能參數(shù)，可將火劃分為３個(gè)階段，即初起階段、全盛階段及衰減階段。所有可燃材料大多是在火災(zāi)全盛階段燃燒，一般很少有阻燃能力。在評(píng)估材料火危害性時(shí)，只需考慮從火初起至閃燃這一階段，此階段包括下述幾個(gè)過程：點(diǎn)燃、火焰?zhèn)鞑?、釋熱和閃燃，它們所產(chǎn)生的效應(yīng)稱為火的一級(jí)效應(yīng)。此外，這一階段還會(huì)產(chǎn)生多種次級(jí)效應(yīng)，即材料燃燒產(chǎn)生的煙、有毒及腐蝕性產(chǎn)物的危害。這些火的一級(jí)效應(yīng)和次級(jí)效應(yīng)，涉及材料的主要阻燃參數(shù)，也是材料阻燃性能測(cè)試方法的具體內(nèi)容。</p><p style="text-indent:25px">在鍋爐燃燒現(xiàn)場(chǎng)我們可以發(fā)現(xiàn)，用紫外線光敏管檢測(cè)器或磷化鉀檢測(cè)器監(jiān)視煤粉燃燒器時(shí)，被檢測(cè)火焰的信號(hào)強(qiáng)度可能等同于或低于毗鄰的火焰信號(hào)強(qiáng)度，這是因?yàn)槲慈济悍墼诳拷紵骱砜诓糠滞鸬揭环N遮蓋作用，它實(shí)際上是一股暗黑色的煤粉和一次風(fēng)的混合物，我們叫它黑龍區(qū)，若火焰檢測(cè)器視線通過或接近黑龍區(qū)，則當(dāng)燃燒器停用而爐膛內(nèi)的其它燃燒器繼續(xù)運(yùn)行燃燒時(shí)，信號(hào)強(qiáng)度反而比原來增加了，燃煤鍋爐推薦采用檢測(cè)火焰閃爍高頻分量的可見光檢測(cè)器或紅外線檢測(cè)器。由于氣體火焰不具有煤火焰和油火焰所特有的高頻(100—400Hz) 脈動(dòng)特性，因而紅外線檢測(cè)系統(tǒng)對(duì)氣體火焰不起作用，所有對(duì)氣體燃料推薦采用紫外線檢測(cè)器。燃燒性能檢測(cè)工作時(shí)要保持電壓的穩(wěn)定。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="棗莊燃燒性能檢測(cè)廠家,燃燒性能檢測(cè)" src="https://tyunfile.71360.com/UploadFile/shhhjc/637342376045947265/281170.png"></div><p style="text-indent:25px">燃燒性能是指材料燃燒或遇火時(shí)所發(fā)生的一切物理和化學(xué)變化，這項(xiàng)性能由材料表面的著火性和火焰?zhèn)鞑バ?、發(fā)熱、發(fā)煙、炭化、失重以及毒性生成物的產(chǎn)生等特性來衡量。燃燒可以發(fā)光放熱。等級(jí)判據(jù)的主要參數(shù)及概念：材料。是指單一物質(zhì)均勻分布的混合物。燃燒滴落物/微粒。在燃燒試驗(yàn)過程中，從試樣上分離的物質(zhì)或微粒。臨界熱輻射通量?；鹧嫦缣幍臒彷椛渫炕蛟囼?yàn)30分鐘時(shí)火焰?zhèn)鞑サ降妮^遠(yuǎn)處的熱輻射通量。燃燒增長速率試樣燃燒的熱釋放速率值與其對(duì)應(yīng)時(shí)間比值的較大值，用于燃燒性能分級(jí)。是指當(dāng)試樣燃燒釋放熱量達(dá)到0.2MJ時(shí)的燃燒增長速率指數(shù)。FIGRA0.4MJ是指當(dāng)試樣燃燒釋放熱量達(dá)到0.4MJ時(shí)的燃燒增長速率指數(shù)。燃燒性能檢測(cè)工作中要檢查元件狀態(tài)是否完好。棗莊燃燒性能檢測(cè)廠家</p><p style="text-indent:25px">燃燒性能檢測(cè)可按需要進(jìn)行調(diào)整。棗莊燃燒性能檢測(cè)廠家</p><p style="text-indent:25px">需要加以區(qū)別的是電器、家具制品上用的泡沫塑料的燃燒性能等級(jí)分為B1、B2、B3三級(jí)，需要用建材熱釋放速率試驗(yàn)儀和泡沫塑料水平垂直燃燒儀來判定等級(jí)。保溫材料阻燃等級(jí)主要分為A1、A2、B1、B2、B3等級(jí)別，是建筑保溫材料**的阻燃等級(jí)表示方法。用來判定AI等級(jí)的是建材不燃性試驗(yàn)爐和建材燃燒熱值測(cè)試儀；用來判定A2等級(jí)的是建材不燃性試驗(yàn)爐、建材燃燒熱值測(cè)試儀和建材制品單體燃燒試驗(yàn)儀；用來判定B1、B2、B3等級(jí)用來判定建材制品單體燃燒試驗(yàn)儀和建材可燃性試驗(yàn)爐或鋪地材料輔熱源法燃燒性能測(cè)試儀等。電線電纜電器類燃燒等級(jí)分為B1、B2、B3三級(jí)，主要用氧指數(shù)測(cè)定儀、電線電纜垂直燃燒儀和電線電纜煙密度測(cè)試儀來判定等級(jí)。棗莊燃燒性能檢測(cè)廠家</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2808860.html</p></div></div></div></div></div><div id="vu3gd2n" class="page-right twoColRt"><div id="u7eb24u" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="gkzqxeg" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" 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