清洗的作用是對方管表面殘留的酸性物質及其它雜物進行清洗，通過鈍化處理獲得良好的清洗效果。要考慮到清洗的熱水溫度多少度以及其他方面的事項，下面來簡單講講吧。
The function of cleaning is to clean the remaining acidic substances and other sundries on the surface of the square pipe, and good cleaning effect can be obtained through passivation treatment. To consider the temperature of hot water for cleaning and other matters, let's talk about it briefly.
冷水洗槽要經常保持滿流，高壓水要不停地沖洗，冷拔異型鋼管生產加工，水壓應保持在0.5MPa以上。在上述條件下冷水中酸的質量濃度不得超過0.1g/L，否則酸洗后洗冷拔無縫管容易銹蝕。 每天和晚上測試冷水中酸的質量濃度。熱水槽的熱水溫度要在95度以上，熱水中不應有酸質，以防方管銹蝕。
The cold water washing tank should always be kept full flow, and the high-pressure water should be continuously washed. The water pressure should be kept above 0.5MPa for the production and processing of cold drawn special-shaped steel pipes. Under the above conditions, the mass concentration of acid in cold water shall not exceed 0.1g/l, otherwise the cold drawn seamless pipe after pickling is easy to rust. Test the mass concentration of acid in cold water every day and at night. The hot water temperature of the hot water tank should be above 95 ℃, and there should be no acid in the hot water to prevent the square pipe from rusting.
熱水槽出口的一對擠水膠輥要壓緊，保證方管表面的水分。在連續酸洗機組里，酸洗后方管進行涂油，使方管在軋制前存放期間（10天左右）不生銹。鈍化是使酸洗后的方管表面形成鈍化膜，提高抗環境腐蝕能力，一般保證方管在2~3天內不再生銹。
A pair of squeeze rubber rollers at the outlet of the hot water tank shall be pressed tightly to ensure the moisture on the surface of the square tube. In the continuous pickling unit, the square tube is oiled after pickling, so that the square tube will not rust during the storage period (about 10 days) before rolling. Passivation is to form a passivation film on the surface of the pickled square tube, improve the ability to resist environmental corrosion, and generally ensure that the square tube will not rust within 2-3 days.
此外方管之所以可以被大家喜愛而且被大量的使用，是因為方管本身擁有很多的優點嗎，正是這些優點讓方管成為了我們生活中的“常客”。以前使用的材料很普通，也是很容易就生銹，使用時間往往都不會很長，但是現在使用的方管，這種方管經過防腐蝕的處理，就不會很容易生銹。使用的時間也會很長。
In addition, the reason why square tubes can be loved and widely used is because square tubes have many advantages. It is these advantages that make square tubes become "regular customers" in our life. In the past, the materials used were very common and easy to rust, and the use time was often not very long, but now the square tube used, after anti-corrosion treatment, this square tube will not rust easily. It will take a long time to use.
方管的重強度比其它材料稍高，很少淬火，無回火脆性。冷變形塑性高、一般供彎曲、壓延、彎邊和錘拱等加工，電弧焊和接觸焊的焊接性能好，氣焊時厚度小，外形要求嚴格或形狀復雜的制件上易發生裂紋。切削加工性冷拔或正火狀態較退火狀態好、一般用于制造受力不大而韌性要求高的。
The heavy strength of square tube is slightly higher than that of other materials, with little quenching and no tempering brittleness. Cold deformation has high plasticity. It is generally used for bending, calendering, bending and hammer arch processing. Electric arc welding and contact welding have good welding performance. During gas welding, cracks are easy to occur on parts with small thickness, strict shape requirements or complex shape. The machinability of cold drawing or normalizing state is better than that of annealing state. It is generally used for manufacturing with low stress and high toughness requirements.
濟南方管適用于工程、煤礦、紡織量，當然方管的每一個優點都會有使用的領域，就像方管重量很輕，就被大量的使用在制造零件，像自行車的車架就是使用的方管。方管的優點遠遠不止這些，也正是這些優點讓方管可以大量的使用，也給我們的生活提供著很多的便利。同時也讓方管廠家得到了豐富的收益。
Jinan square tube is suitable for engineering, coal mining and textile production. Of course, every advantage of square tube will be used in the field. Just as square tube is very light, it is widely used in manufacturing parts, such as the frame of bicycle. The advantages of square tube are far more than these. It is these advantages that make square tube can be used in a large number of ways, and also provide a lot of convenience to our life. At the same time, square tube manufacturers have also received rich benefits.
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