Quality inspection standard for rapid rolling shutter industrial doors

Quality inspection standard for rapid rolling shutter industrial doors

1,Package, the packaging is divided into cut into a fixed length of galvanized sheet and galvanized sheet with coil packaging two. Generally, it is packed in tin sheet, lined with moisture-proof paper, and tied with iron kidney outside, which is strong and prevents friction between galvanized plates of the inner window.

2, Specifications & models, specifications related to material limits (as follows and) are marked the thickness, length and total width of galvanized sheet recommended limits and allowable problems. Other, the total width and length of the board, the total width of the volume according to customer requirements.

3, Surface overview: galvanized sheet due to the contradiction of processing methods in the coating and plating process, the overview is also contradictory, such as general zinc flower, fine zinc flower, flat zinc flower, zinc free flower and phosphating treatment overview. Galvanized sheet and galvanized steel coil cut into fixed length shall not have defects harmful to application. 

4, Galvanized quantity, galvanized quantity limit value: galvanized quantity is a hint of galvanized sheet zinc layer thickness. For example, the amount of double-sided galvanizing is similar (i.e., equal thickness galvanizing) and the amount of double-sided galvanizing is contradictory (i.e., difference thickness galvanizing) two kinds. Galvanized quantity module is g/m2.

5, Panel type, measurement plate type bad and good have two overall goals, vertical and long knife bend. The verticality of the panel and the larger allowable limits of long knife bends are also very demanding.

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