1. Since Large OD elbow is mostly used for welding, in order to improve the welding quality, the ends are beveled, with a certain angle and a certain side. This requirement is also stricter, how thick the side and what is the angle There are provisions for the deviation range. The surface quality and mechanical properties are basically the same as those of the pipe. For the convenience of welding, the steel grade of Large OD elbow and the connected pipe are the same.

2. That is, all Large OD elbows must 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. The requirements for packaging. For Large OD 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. The standard allows suits, that is, large sets of small , But the total weight generally cannot exceed 1 ton. For large items, single packaging is required, such as 24″ must be individually packaged. The other is the packaging mark, the mark must indicate the size, steel number, batch number, manufacturer's trademark, etc.