All pipe fittings shall be subject to surface treatment. The oxide scale on the internal and external surfaces shall be shot blasted off and then coated with anti-corrosion paint. This is for export, and also for the convenience of transportation and prevention of corrosion and oxidation at home.
It is the requirement for packaging. For small pipe fittings, such as export, a wooden box should be made, which is about 1 cubic meter. It is stipulated that the number of elbows in this box should not exceed one ton. This standard allows a suit, that is, a large suit is small, but the total weight should generally not exceed one ton. For large piece y, single package is required. For example, 24 ″ must be packaged separately. The other is the packaging mark, which is to indicate the size, steel grade, batch number, manufacturer's trademark, etc.
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