1, because most of the metal bending fittings are used for welding, in order to improve the quality of welding, the end is bevelled, leaving a certain Angle, with a certain edge, this requirement is also more strict, how thick the edge, how much the Angle and the deviation range are specified. The surface quality and mechanical properties are basically the same as the pipe. In order to facilitate welding, the steel grade of the pipe fittings and the pipe to be connected is the same.

2, that is, all pipe fittings should be surface treatment, the inner and outer surface of the oxide sheet through shot blasting spray, and then coated with anti-corrosion paint. This is for export needs, in addition, in order to facilitate transportation to prevent rust and oxidation, we must do this work.

3, is the packaging requirements for small pipe fittings, such as exports, you need to make wooden boxes, about 1 cubic meter, the number of elbows in this box can not exceed one ton, the standard allows the set, that is, a large set of small, but the total weight generally can not exceed 1 ton. For large pieces y will be a single package, like 24 "must be a single package. The other is the packaging mark, the mark is to indicate the size, steel number, batch number, manufacturer's trademark and so on.