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    您的位置:首頁 > 新聞動態 > 鋼管知識

    廠家分享冷拔鋼管如何貯存才能不生銹

    發布日期:2019-07-01 瀏覽次數:56

    冷拔鋼管平常在進行貯存的時候會發生氧化,導致生銹。但是隨著科學技術的發展,對冷拔鋼管的貯存條件越來越好,那么防止抗氧化技術也發展的科學了?,F在我們貯存產品,一般是將冷拔鋼管放到一個棚子里,這樣在其表面撒上一些含有氯化鈉的粉末,這樣是為了與外界的銹跡元素進行中和,但是必須注意的是氯化鈉粉末要隔一段時間就要進行重撒一遍。

    Cold-drawn steel pipes are usually oxidized and rusted during storage. However, with the development of science and technology, the storage conditions of cold-drawn steel tubes are getting better and better, so the anti-oxidation technology has also developed. Now we store products, usually cold-drawn steel pipe in a shed, so that some powder containing sodium chloride is sprayed on its surface, so as to neutralize the rust elements outside, but it must be noted that sodium chloride powder should be re-sprayed at intervals.

    如何處理冷拔鋼管因內壁氧化皮脫落而造成的堵塞問題首先采用約80%左右爐管內徑大小的鋼絲繩對內部來回疏通。將管子內壁上的氧化皮捅掉、將堵塞爐管的氧化皮捅穿:鋼絲繩疏通完成后,再利用高壓水槍(泵出口壓力在80MPa左右),對每根內壁進行不間斷地沖洗.沖洗完成后再利用內窺鏡對每根管子進行檢查。

    How to deal with the blockage problem of cold drawn steel pipe caused by the falling off of oxide scale on the inner wall? Firstly, the steel wire rope of about 80% of the inner diameter of the furnace tube is used to dredge the inside back and forth. Punch the oxide scales off the inner wall of the tube and pierce the oxide scales blocking the furnace tube. After the wire rope is dredged, the inner wall of each tube is washed continuously with a high pressure water gun (the outlet pressure of the pump is about 80 MPa). After the washing is completed, each tube is inspected with an endoscope.

    保證管子內部暢通:根據沖洗結束后內窺鏡檢查情況,對冷拔鋼管進行第二次酸洗〔包墻過熱器由于結構原因.未能對其進行酸洗),而此前鍋爐安裝結束后的次酸洗.由于對垂直水冷壁管內部氧化物情況不明.且所取樣管為正常合格的螺旋水冷壁樣管.因此采用的是對銹類、垢類雜質有效.但對高溫氧化皮效果不是好的EDTA清洗工藝。針對爐管發生泄露后所發現的悄況.我們應采用了復合酸(催化檸檬酸)為介質.井設計了”兩步清洗法”經過兩次強效的化學清洗.終使得內壁氧化皮全部清洗干凈。

    Make sure the inside of the tube is unblocked: According to the endoscopy examination after washing, the cold-drawn steel pipe is pickled for the second time [because of structural reasons, the wall superheater can not be pickled], and the hypo-pickling after the installation of the boiler before. Because of the unclear internal oxide condition of the vertical water-cooled wall pipe, and the sampled tube is normally qualified. Therefore, EDTA cleaning process is effective for rust and scale impurities, but not good for high temperature oxide skin. In view of the quiet situation found after the leakage of the furnace tube, we should use compound acid (catalytic citric acid) as the medium. Well design "two-step cleaning method" after two strong chemical cleaning, finally make the inner oxide scale clean. 

    辛苦整理!轉載請注明來自 http://www.maksvelo.com/show.asp?id=79

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