1. Due to the fact that fittings are mostly used for welding, to enhance welding quality, the ends are machined into bevels with a certain angle and edge. This requirement is quite stringent, with specifications for the thickness of the edge, the angle, and the tolerance range. The surface quality and mechanical properties are essentially the same as those of the pipe. For ease of welding, the steel type of the fittings is the same as that of the connected pipe.

All piping components must undergo surface treatment, removing the oxide scale from both the inner and outer surfaces through shot blasting, followed by the application of anti-corrosion paint. This is necessary for export requirements, and also, domestically, to facilitate transportation and prevent rust and oxidation, this work must be carried out as well.

3. The requirement for packaging is that for small pipe fittings, such as for export, wooden boxes are needed, approximately 1 cubic meter in size. The standard stipulates that the number of elbows in such boxes should not exceed one ton. This standard allows for sets, i.e., larger sets with smaller ones, but the total weight is generally not to exceed one ton. For larger items, such as 24" pipes, they must be packaged individually. Additionally, packaging labels must indicate dimensions, steel grades, batch numbers, manufacturer's trademarks, and more.