摘要：<span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-family:宋體;mso-ascii-font-family:&quot;mso-hansi-font-family:&quot;;"><span style="font-size:small;">為什么醫(yī)院要采用不銹鋼管輸送氧氣</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-size:small;"><span style="font-family:&quot;Times New Roman&quot;;"><span lang="EN-US">&nbsp; </span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;mso-hansi-font-family:&quot;;">氧是自然界分布*廣泛的元素之一。它以游離狀態(tài)和化合狀態(tài)存在于自然界中，空氣中游離狀態(tài)的氧達(dá)</span><span style="font-family:&quot;Times New Roman&quot;;"><span lang="EN-US">20.93%</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;mso-hansi-font-family:&quot;;">?；蠣顟B(tài)的氧存在于水、礦物、植物和動(dòng)物等物體中。在常溫及大氣壓力下，氧為無(wú)色、無(wú)味、無(wú)臭的透明氣體，比空氣略重。氧的化學(xué)性質(zhì)非?；顫姡菑?qiáng)烈的氧化劑和阻燃劑。在一般情況下，他除了與金、銀、鉑及惰性氣體不發(fā)生化合外，與其他物質(zhì)都能化合生成氧化物，氧與其他物質(zhì)化合的過(guò)程即為氧化反應(yīng)。氧與可燃?xì)怏w如氫、乙炔、甲烷等按一定比例混合后很容易爆炸。氧經(jīng)壓縮后在輸送過(guò)程中如有油脂、氧化鐵銷及其他易燃物質(zhì)存在時(shí)，隨著氣流與管壁的摩擦撞擊產(chǎn)生大量摩擦熱，可能會(huì)導(dǎo)致不銹鋼管和設(shè)備的介質(zhì)燃燒或爆炸。壓縮氧氣混雜有水分，會(huì)使不銹鋼氧氣管道產(chǎn)生凝結(jié)水，純度越高的氧氣對(duì)不銹鋼管的腐蝕越嚴(yán)重。針對(duì)氧氣管道的這些特點(diǎn)，在管道安裝及維修中要合理選材，并有相應(yīng)的技術(shù)措施。</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-size:small;"><span style="font-family:&quot;Times New Roman&quot;;"><span lang="EN-US">&nbsp; </span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;mso-hansi-font-family:&quot;;">工業(yè)生產(chǎn)中使用的氧氣，一種是由制氧直接用管道送往用戶，一種是在制氧車間以</span><span style="font-family:&quot;Times New Roman&quot;;"><span lang="EN-US">15MPa</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;mso-hansi-font-family:&quot;;">的高壓充瓶，將瓶裝氧氣運(yùn)往用戶。不銹鋼氧氣管道修理前應(yīng)將修理斷與管網(wǎng)斷開(kāi)，并用空氣、氮?dú)饣蛘羝麑⒀鯕馊口s走置換，不留死角。修理完后應(yīng)按照要求進(jìn)行強(qiáng)度和氣密性試驗(yàn)。試驗(yàn)合格后，正式送氧前應(yīng)選用氧氣對(duì)管道進(jìn)行吹洗，吹洗管道也可應(yīng)用不含油的壓縮空氣或氮?dú)?，氣流速度不小?lt;/span><span style="font-family:&quot;Times New Roman&quot;;"><span lang="EN-US">20m/s</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;mso-hansi-font-family:&quot;;">，所有輸送氧氣的不銹鋼管都應(yīng)吹洗到。在氣流出口處用白紙檢驗(yàn)，沒(méi)有塵粒和水分痕跡為合格。吹洗合格后再用容積不少于吹洗管的</span><span style="font-family:&quot;Times New Roman&quot;;"><span lang="EN-US">3</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;mso-hansi-font-family:&quot;;">倍氧氣換管內(nèi)的吹洗氣體，且各個(gè)死角都應(yīng)該設(shè)法置換到。置換管道的氧氣應(yīng)排至室外，排除口離地面不少于</span><span style="font-family:&quot;Times New Roman&quot;;"><span lang="EN-US">2.5</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;mso-hansi-font-family:&quot;;">米，并應(yīng)遠(yuǎn)離火源。輸送含濕氧的管道凍結(jié)時(shí)只能用熱水或蒸汽融凍，嚴(yán)禁用明火融凍。</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-size:small;"><span style="font-family:&quot;Times New Roman&quot;;"><span lang="EN-US">&nbsp;</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;mso-hansi-font-family:&quot;;">廠區(qū)架空輸送氧氣不銹鋼管支架，應(yīng)采用非燃燒材料制作，在閥門(mén)、排水器及其他需要檢查維護(hù)的地方應(yīng)安裝梯子和平臺(tái)。含濕氧氣不銹鋼管，在寒冷地區(qū)應(yīng)采取防凍措施，防凍措施可采用敷設(shè)保溫層或加伴熱管。當(dāng)采用伴熱管時(shí)，伴熱管的介質(zhì)應(yīng)采用不超過(guò)</span><span style="font-family:&quot;Times New Roman&quot;;"><span lang="EN-US">90</span></span><span style="font-family:宋體;mso-bidi-font-family:宋體;">℃</span><span style="font-family:宋體;mso-ascii-font-family:&quot;mso-hansi-font-family:&quot;;">熱水。</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span lang="EN-US"><span style="font-family:&quot;Times New Roman&quot;;font-size:small;">&nbsp;</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span>