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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 id="2yrizqc" 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="cqcdplh" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</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>延慶區(qū)燃燒性能檢測哪里便宜,燃燒性能檢測</p><p><span>***更新：</span>2021-01-17 02:11:53</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="gaa2h3j" 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: </span>021-69910835</p><p><span>地址: </span>匯善路685號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="i3tp23h" class="page-proshow02"><p class="title">詳細說明</p><div id="cqmi3e2" class="box"><p><p style="text-indent:25px">由于塑料具有質(zhì)輕、耐潮、耐腐蝕、電絕緣性好、一次加工成型、原料來源普遍等特點,所以塑料制品被普遍應(yīng)用于**工業(yè)、交通運輸建筑家用電器、日用家俱等各個領(lǐng)域,在國民經(jīng)濟發(fā)展中占有重要地位。但由于塑料-般具有易燃的缺點，尤其是電氣用的塑料部件因發(fā)熱、放電等原因釀成火災(zāi)事故屢見不鮮,在某種程度上又影響其普遍應(yīng)用。因此世界各國對塑料的燃燒性的測試與阻燃技術(shù)的研究極為重要。國內(nèi)外對塑料燃燒性的測試已提出多種方法,如氧指數(shù)法，延慶區(qū)燃燒性能檢測哪里便宜、水平燃燒法、垂直燃燒法、直接燃燒法等等，延慶區(qū)燃燒性能檢測哪里便宜。氧指數(shù)是評價塑料及其他高分子材料相對燃燒性的一種表示方法，延慶區(qū)燃燒性能檢測哪里便宜，以此判斷材料在空氣中與火焰接觸時燃燒的難易程度非常有效。燃燒性能檢測設(shè)備是一款可以控制溫度的設(shè)備。延慶區(qū)燃燒性能檢測哪里便宜</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="延慶區(qū)燃燒性能檢測哪里便宜,燃燒性能檢測" src="https://tyunfile.71360.com/UploadFile/shhhjc/637342376075507812/9573497.png"></div><p style="text-indent:25px">氧指數(shù)簡稱OI，是在規(guī)定條件下，試樣在氧、氮混合氣流中，維持平穩(wěn)燃燒所需的較低氧氣濃度，以氧所占體積百分?jǐn)?shù)表示。氧指數(shù)高表示材料不易燃燒，氧指數(shù)低表示材料容易燃燒，一般認(rèn)為氧指數(shù)＜22屬于易燃材料，氧指數(shù)在22～27之間屬可燃材料，氧指數(shù)＞27屬難燃材料。氧指數(shù)是評價塑料及其他高分子材料相對燃燒性的一種表示方法，以此判斷材料在空氣中與火焰接觸時燃燒的難易程度，氧指數(shù)越大,材料的阻燃性能越好。將一個試樣垂直地固定在向上流動的氧、氮混合氣體的透明玻璃燃燒筒中，點燃試樣的頂端，并觀察試樣的燃燒特性，把試驗連續(xù)燃燒時間或試樣燃燒強度與給定的判據(jù)相比較，通過在不同氧濃度下的一系列試驗，估算氧濃度的較小值。無錫燃燒性能檢測哪里便宜燃燒性能檢測是指其燃燒或遇火時所發(fā)生的一切物理和化學(xué)變化。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="延慶區(qū)燃燒性能檢測哪里便宜,燃燒性能檢測" src="https://tyunfile.71360.com/UploadFile/shhhjc/637342376110937500/9890297.png"></div><p style="text-indent:25px">在用于暖爐和點火用的油火焰中，除了有一部分CO2 和水蒸氣外，還有大量的發(fā)光碳黑粒子，它也能輻射較強的可見光、紅外線和紫外線，因此可采用對這三種火焰較敏感的檢測元件進行測量。而可燃氣體作為主燃料燃燒時，在火焰初始燃燒區(qū)輻射較強的紫外線，此時可采用紫外線火焰檢測器進行檢測。除輻射穩(wěn)態(tài)電磁波外，所有的火焰均呈脈動變化。因此，單燃燒器工業(yè)鍋爐的火焰監(jiān)視可以利用火焰脈動變化特性，采用帶低通濾波器(10—20Hz)的紅外固體檢測器(通常采用硫化鉛)。但電站鍋爐多燃燒器爐膛火焰的閃爍規(guī)律與單燃燒器工業(yè)鍋爐不大一樣，特別是在燃燒器的喉口部分，閃爍頻率的范圍要寬得多。</p><p style="text-indent:25px">材料阻燃性能測試方法根據(jù)試件大小可分為：實驗室試驗、中型試驗及大型試驗。其中實驗室試驗和中型試驗較為常用，這兩類試驗，通常根據(jù)被測物體的可燃性、點燃性、火焰?zhèn)鞑?、釋熱及生煙性、火?zāi)氣體的毒性及腐蝕性等，對引發(fā)火災(zāi)具有決定性影響的參量將試驗分為6類：可燃性試驗，如極限氧指數(shù)：是要測定火是否易于引起；火焰?zhèn)鞑バ栽囼?，如隧道試驗和輻射板試驗：是要測定火是否易于蔓延和火傳播速率；釋熱性試驗，錐形量熱儀和量熱計試驗：是要測定材料燃燒時的放熱量及放熱速率，以了解火的發(fā)展趨勢及火對鄰近地區(qū)的危險。燃燒性能檢測要嚴(yán)格檢測把施工中的所有安全隱患和質(zhì)量通病。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="延慶區(qū)燃燒性能檢測哪里便宜,燃燒性能檢測" src="https://tyunfile.71360.com/UploadFile/shhhjc/637342376058378906/1054254.png"></div><p style="text-indent:25px">火焰?zhèn)鞑ナ侵富鹧媲把卦诓牧媳砻娴陌l(fā)展，它關(guān)系到火災(zāi)波及鄰近可燃物而使火勢擴大。火焰?zhèn)鞑バ阅艹Ｒ运淼婪拜椛浒宸y定?；鹧媛訙y試是一個重要的燃燒性能對比試驗，主要測試對象是平板材料、復(fù)合材料或組件，這些材料主要是用來作為暴露的外表面的墻壁。所用的比較試驗數(shù)據(jù)是火焰沿著樣品的表面垂直方向上橫向蔓延的距離和時間。試驗是在試樣經(jīng)受引燃火焰的輻射下而進行的?；鹧媛訙y試儀使用氣體燃燒熱輻射板，用引燃火焰點燃測試樣品。引燃后，觀測火焰前緣，記錄火焰前緣沿樣品水平蔓延情況及所用時間。結(jié)果顯示為火焰蔓延距離時間比，火焰前緣速率熱流比，熄滅時臨界熱流，以及燃燒過程平均熱量。為滿足 IMO 標(biāo)準(zhǔn)，儀器裝有熱電偶堆，測算熱釋放率。燃燒性能檢測可以根據(jù)工作需求的不同進行轉(zhuǎn)換調(diào)節(jié)。平谷區(qū)燃燒性能檢測廠家有哪些</p><p style="text-indent:25px">燃燒性能檢測是一種常見的工業(yè)檢測方式。延慶區(qū)燃燒性能檢測哪里便宜</p><p style="text-indent:25px">在塑料阻燃性能試驗方法中，水平及垂直燃燒試驗較具展示性，且應(yīng)用也較為普遍。本法測定塑料表面火焰?zhèn)鞑バ阅?，其原理系水平或垂直地夾住試樣的一端，對試樣自由端施加規(guī)定的點燃源，測定線性燃燒速率（水平法）或有焰燃燒及無焰燃燒時間（垂直法）等來評價試樣的阻燃性能。將試樣水平放置在試樣架上，點燃本生燈，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，對試樣施加火焰30s，撤去本生燈。如果施焰時間不足30s，火焰前沿已達到25mm標(biāo)線時，應(yīng)立即移開本生燈，停止施焰。記錄燃燒前沿從25mm標(biāo)線到燃燒終止時的燃燒時間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)。如果移開點火源后，火焰即滅或燃燒前沿未達到25mm標(biāo)線，則不計燃燒時間、燒損長度和線性燃燒速度。延慶區(qū)燃燒性能檢測哪里便宜</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2878415.html</p></div></div></div></div></div><div id="nbxofl3" class="page-right twoColRt"><div id="l3stk3g" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="gpgxiou" 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配件哪家強信息推薦自業(yè)物資供應(yīng)" class="vcenter" 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