1. Since most of the 45D elbow is used for welding, in order to improve the welding quality, the end of the 45D elbow is beveled with a certain angle and a certain side. This requirement is also relatively strict. How thick the side is, and the angle is There are regulations on how much and the range of deviations. The surface quality and mechanical properties are basically the same as those of the pipe. For the convenience of welding, the steel grade of 45D elbow and the connected pipe are the same.

2. That is, all 45D elbows have to undergo surface treatment, and the oxide scale on the inner and outer surfaces is sprayed off by shot blasting, and then coated with anticorrosive paint. This is for export needs. Moreover, it is also for the convenience of transportation in the country to prevent corrosion and oxidation. This work must be done.

3. It is the requirement of packaging. For 45D elbow, such as export, you need to make a wooden box, about 1 cubic meter. It is stipulated that the number of elbows in this box should not exceed one ton. This standard allows sets, that is, large sets and small sets. However, the total weight should generally not exceed 1 ton. For large items, it must be packaged individually, like 24″ must be packaged individually. The other is the packaging mark, which must indicate the size, steel number, batch number, manufacturer's trademark, etc.