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      彎頭技術要求Technical requirements of elbow

      1, as most of the pipe fittings are used for welding, in order to improve the welding quality, the end is all turning into a slope, leaving a certain angle and with a certain edge. This requirement is also strict, the edge is thick, the angle is as much as the range and the range of the deviation are all stipulated. The surface quality and mechanical properties are basically the same as those of pipes. For the convenience of welding, the fittings of the pipe and the connected pipe are the same.
      2, that is, all fittings must be treated by surface treatment. The oxide scales inside and outside are sprayed out by shot peening, and then coated with anticorrosive paint. This is for export needs. In addition, it is also for domestic transportation to prevent rust and oxidation.
      3, the requirements for the packaging for small pipes, such as the export, the need to do wooden cases, about 1 cubic meters, the number of bends in this box can not be more than one ton, the standard allows suit, that is, large sets, but the total weight is generally not more than 1 tons. For large y, a single package is required, like 24 ', which must be packed individually. Another is the packaging mark, marking is the size, the steel number, the batch number, the manufacturer trademark and so on.
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