Bar for quality inspection
one of the most main is testing, product drawing, just after qualification. Therefore, the problem comes. Outer wall heat preservation nail test, what kind of best?
2 and, of course, is the national standard of the quality of the best. But this product cost is too high, many provided to site just take this kind of product quality supervision to do testing, with slightly after almost products for construction.
three, on the other hand, if you want to detect drawing, our factory give you a little advice. Site do drawing, main is testing nails will be drawn from the expansion bolt, at this time than nails roughness is less than 3. 8 mm is fully qualified!
four, so, sometimes as long as the outer wall heat preservation nail nails used by roughness to 3. More than 8 mm or, there is no problem when doing the test