How to reduce the cost of butt welding elbow production
Butt welding elbow and welding elbow production process is different, need to be in accordance with the standard production, to ensure that the production of push welding butt welding elbow show good practical value in use, then how to ensure the quality of the premise, reduce the cost of production, let's analyze it together
Methods to reduce the cost of butt welding elbows
Elbow connection may need to withstand relatively high elongation, compression, bending and shear strength, carbon steel elbow is a good choice, carbon steel elbow stiffness difference, mainly used for pressure p≤4MPa places, butt welding elbow is also known as high neck elbow, stiffness is large, mainly used for high pressure temperature places.
Butt welding elbow greatly shorten the production cycle, the production cost is relatively low, because it does not need any unique facilities, so it is especially suitable for the field processing of large carbon steel elbow, blank for flat or developable curved surface, simple cutting, accuracy is easy to ensure, easy assembly and welding.
In order to avoid welding elbow due to heating and eye erosion, welding current can not be too large, less than carbon steel welding rod 20% up and down, the arc should not be too much, the sandwich should be quickly cooled, it is recommended to use narrow weld, welding elbow after high hardenability, easy to crack
If the same type of welding elbow is used for welding, it is necessary to preheat more than 300 ° C and slow cooling treatment about 700 ° C after welding. If the welding part cannot be heat treated after welding, it is appropriate to choose the butt welding elbow electrode.
Welding elbow has corrosion resistance (oxidizing acid, organic acid, cavitation), heat resistance and wear resistance, mostly used in crude oil, natural gas, chemical plants, hydropower, construction, heating industry pipeline system, pipe fittings referred to as pipe fittings, used to connect pipeline valves and equipment inlet and outlet nozzles
Unfortunately, the iron oxide formed on ordinary carbon steel continues to oxidize, so that the corrosion continues to develop, and eventually form holes, when the arc of the welded elbow is the butt joint, this change of external load will make the joint in a complex state of stress, seriously weaken the joint strength, reduce the working capacity of the welded elbow, reduce the service life of the welded elbow.
Therefore, from the design point of view, the interface of the butt welded elbow is changed to a straight butt, that is, the design of the straight welded elbow is beneficial to the joint butt, improve the quality of the joint, and improve the service life of the welded elbow.
Process parameters that affect the geometry of welded elbows
The material, wall thickness and outside diameter of the push blank, the material and style of the core rod head, the heating temperature and its distribution, and the progress of the push, different factors have different effects on the welding elbow, and the corresponding ways and methods should be used to ensure the specific use value and role of the welding elbow in use.
The above is the relevant introduction of how to reduce costs in the production of butt welding elbows. I hope to use the author's sharing to let us have a further understanding and understanding of butt welding elbows. If you want to know more about elbows, elbows, flanges, and tees, then pay attention to us!
