視(shi)鏡(jing)是工業管(guan)(guan)(guan)道裝置上的主(zhu)要附件之(zhi)一，也稱玻(bo)璃管(guan)(guan)(guan)視(shi)鏡(jing)、視(shi)盅、雷特視(shi)鏡(jing)、管(guan)(guan)(guan)式視(shi)鏡(jing)，通過它能隨時觀察管(guan)(guan)(guan)道中(zhong)(zhong)(zhong)氣體、液體等介質(zhi)流動反(fan)應情況，監視(shi)生(sheng)產，避(bi)免(mian)生(sheng)產過程中(zhong)(zhong)(zhong)事故發生(sheng)。經常用(yong)于石油、化工、化纖、制(zhi)藥等行業的生(sheng)產管(guan)(guan)(guan)路中(zhong)(zhong)(zhong)。視(shi)鏡(jing)可用(yong)于溫度高，腐(fu)蝕性(xing)強、易中(zhong)(zhong)(zhong)毒(du)、危險性(xing)較大，易結晶的化工塔器中(zhong)(zhong)(zhong)，以保證其安全(quan)生(sheng)產。視(shi)鏡(jing)主(zhu)要由鋼化硼硅玻(bo)璃、法蘭(lan)、接(jie)管(guan)(guan)(guan)等組(zu)成。典型(xing)視(shi)鏡(jing)見圖6.6.3。

  ①. 視(shi)鏡(jing)是用于觀察液(ye)體(ti)、氣(qi)體(ti)、蒸汽(qi)等介質的流動反應設(she)備，其視(shi)窗(chuang)玻璃(li)應保持干凈無灰塵(chen)；

  ②. 視(shi)鏡的視(shi)窗玻璃屬(shu)于宜損(sun)件(jian)，安(an)裝視(shi)鏡時要小心輕放；

  ③. 視鏡(jing)玻(bo)(bo)(bo)(bo)(bo)(bo)璃(li)耐溫耐壓有一定的局限，耐溫：鋼化(hua)硼(peng)硅(gui)(gui)玻(bo)(bo)(bo)(bo)(bo)(bo)璃(li)≤180℃、石(shi)英玻(bo)(bo)(bo)(bo)(bo)(bo)璃(li)≤1000℃ 。耐壓：鋼化(hua)硼(peng)硅(gui)(gui)玻(bo)(bo)(bo)(bo)(bo)(bo)璃(li)片(pian)≤3.0MPa、石(shi)英玻(bo)(bo)(bo)(bo)(bo)(bo)璃(li)片(pian)≤10.0MPa、鋼化(hua)硼(peng)硅(gui)(gui)玻(bo)(bo)(bo)(bo)(bo)(bo)璃(li)筒(tong)＜1.0MPa、石(shi)英玻(bo)(bo)(bo)(bo)(bo)(bo)璃(li)筒(tong)＜1.6MPa；

  ④. 允許急(ji)變溫(wen)度＜60℃，玻璃因溫(wen)差過大會破裂，需注意保養。

視鏡有關的標準規范：

  HG/T 21619《視鏡》

  HG/T 21620《鋼化視鏡玻璃(li)的(de)制造、驗收(shou)技(ji)術(shu)條件》

  GB/T 23259《壓力容器(qi)用視鏡(jing)玻璃》