Technical requirements for carbon steel elbow
Because most carbon steel elbows are used for welding, in order to improve the welding quality, the ends are turned into grooves, leaving a certain angle, with fixed edges. This requirement is also relatively strict. There are regulations on the thickness of the edges, the angle and the deviation range. The surface quality and mechanical properties are basically the same as those of pipes. For the convenience of welding, the steel grade of the pipe fitting and the connected pipe is the same.
2. That is to say, all carbon steel elbows have to undergo surface treatment. The oxide scales on the inner and outer surfaces are sprayed off by shot peening, and then coated with anti-corrosion paint. This is to meet the needs of export. In addition, in China, it is also to facilitate transportation and prevent corrosion and oxidation.
3. It is the requirement for packaging. For small pipe fittings, such as export, they need to be made into wooden cases, about 1 cubic meter. It is stipulated that the number of elbows in such cases should not exceed 1 ton. The standard allows suits, that is, large sets are small, but the total weight should not exceed 1 ton. For large items, you have to pack them individually. For example, for 24 "items, you have to pack them individually.