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The production of stainless steel elbow points
Mar 13, 2018

At present, stainless steel elbows have been widely used in chemical engineering, construction, water supply, drainage, petroleum, light and heavy industry, refrigeration, sanitation, plumbing, fire protection, power, aerospace, shipbuilding and other basic projects.


Stainless steel elbow production points:


First, when welding stainless steel elbows, the electrode must be dry during use. General requirements The titanium calcium type should be dried at 150°C for 1 hour, and the low hydrogen type should be dried at 200-250°C for 1 hour. Remember, do not repeat the drying many times, otherwise the skin is easy to crack and peel off. At the same time, it is also necessary to avoid sticky oil or other contaminants on the welding rod to prevent the weld from increasing carbon content and affecting the quality of the weldment.


Secondly, when the stainless steel elbow is welded, carbides may be precipitated during the repetitive heating process, so that the corrosion resistance and mechanical properties of the stainless steel elbow may be applied. Hardness after welding is large and cracks are easily generated. In this process, if welding with the same type of electrode is used, preheating at 300°C or more and annealing at 700°C or less must be performed.


If the stainless steel elbow cannot be heat treated after welding, a chromium-nickel stainless steel electrode is required. In addition, in order to improve the corrosion resistance and weldability of the elbow, the appropriate amount of stability elements Ti, Nb, Mo, etc. will generally be appropriately increased, and the weldability is better.


In addition, with the improvement of the technical level, the current process of producing stainless steel elbows is becoming more and more advanced, which makes the product quality more and more secure. As a commonly used connecting pipe fitting in pipe installation, the application of stainless steel elbows is becoming more and more common.

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