When many users buy butt welding elbows, because they do not have professional inspection equipment, at this time they can only inspect the quality of butt welding elbows from the appearance. The following are several common judgment methods.

1. From the surface of the butt welding elbow, we can see whether the manufacturing process is exquisite. Generally speaking, a good butt welding elbow​The company will definitely be careful in production, and there will be no friction defects. The cross-sectional shape of the fake butt-welded elbow is uneven. The reason is that in order to save material, the reduction of the first two passes of the finished roll is too large. The strength of this steel is greatly reduced, and it does not meet the shape and size of the butt-welded elbow. Standards. The composition of high-quality steel is uniform, the tonnage of the cold shear is high, and the end face of the cutting head is smooth and tidy. However, due to the poor material, the end face of the cutting head often has the phenomenon of meat loss, that is, it is uneven and has no metallic luster. Moreover, because the products of the counterfeit and inferior material manufacturers have less cut heads, big ears will appear at the head and tail.

2. The appearance inspection of butt welded elbow welded joints is a simple and widely used inspection method. It is an important part of finished product inspection, mainly to find defects and dimensional deviations on the weld surface. It is generally inspected by naked eyes, with the help of standard templates, gauges and magnifying glasses. If there are defects on the surface of the weld, there may be defects inside the weld.