What are the technical requirements for elbows
2021-12-22 17:14:10 COMMENT：0 HITS：
1. Since most elbows are used for welding, in order to improve the welding quality, the ends are turned into grooves, with a certain angle and a certain edge. This requirement is also strict. There are regulations on the thickness of the edge, 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 pipe fittings and connected pipes is the same.
2. That is, all pipe fittings shall be subject to surface treatment, and the iron oxide scale on the internal and external surfaces shall be sprayed off by shot peening, and then coated with anti-corrosion paint. This is for export needs. Moreover, this work should be done at home to facilitate transportation and prevent corrosion and oxidation.
3. It is the requirement for packaging. For small pipe fittings, such as export, wooden boxes need to be made, about 1m3. It is stipulated that the number of elbows in such boxes can not exceed one ton. The standard allows suits, that is, large sets and small sets, but the total weight can not exceed 1 ton. For large pieces y, a single package is required. For 24 ", a single package is required. The other is the packaging mark, which should indicate the size, steel number, batch number, manufacturer's trademark, etc.
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