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多點防爆熱電偶保護管的制作要求有什么?

發布時間:2022-03-21      點擊次數:335
  多點防爆熱電偶適合生產現場存在易燃易爆化合物,須同時測量多個位置或位置的多處測量。是利用間隙隔爆原理,設計具有足夠強度的接線盒等部件,將所有會產生火花,電弧和危險溫度的零部件都密封在接線盒腔內,當腔內發生爆炸時,多點防爆熱電偶能通過接合面間隙熄火和冷卻,使爆炸后的火焰和溫度傳不到腔外,從而進行隔爆。廣泛應用于石油化工精餾塔裝置.
  多點防爆熱電偶保護管的制作和要求分別是什么?
  保護管的外觀處理,拋光只不過是把保護管的外表層拋掉一層,光亮好看不實用,但現在由于技術提高,不銹鋼管在生產過程中就可做光潔度處理,在生產時只需在表面再做一下特殊處理,上一層亞光,這樣的外觀看上去很有檔次,也不會丟失質量。
  保護管制作過程中要注意不能往地下扔,這樣做法會破壞保護管的外表,容易造成表面劃痕。
  保護管的厚度:要看現場的溫度要求,最少厚度不能低于2MM。
  保護管的內部清潔,有不少的保護管的內部有污垢,一定要清理。
  螺紋焊接要求:有的熱電偶要帶螺紋, 螺紋的材質通常是選1Cr18Ni9Ti或304或與保護管材質相同的螺紋材質,現在在一些小作坊是用高鉻,而且有的廠家是用鑄的方式生產螺紋,做法是用相等材質的材料車出來。螺紋的二頭必需留有焊臺,方便用氬弧焊焊接。
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