Painting quality steel protective coatings, should the current national standard paint-related products for testing the quality of provision. Steel 2.2 grade steel surface rust, can be used with existing national standards, "the steel surface before painting Rust grades and preparation grades" GB8923 provisions picture control observation to determine. 2.3 Different types of paint coating thickness should detect the following methods were used: a film thickness, the film thickness can be used to detect the number of manufacturers of steel construction, sampling component of this standard should not be less than the Class A table 3.3.13 The minimum capacity of samples tested, nor should be less than 3; each measuring 5 steel construction, the value of each at a distance of three measuring points a dry film thickness of 50mm average. Two pairs of thin fireproof paint coating thickness, coating thickness tester can be used to detect, measure the method should comply with "fireproof coatings application of technical regulations" CECS24's. Construction quality steel works may variability problem with the extension of the outside world will change and the time and constantly evolving, quality defects gradually reflected. For example, the weld steel member changes due to stress, so they had no weld cracks cracks: As the role of hydrogen after welding activities can be delayed in the weld cracks. Another example is the component of long-term bear overload, the steel components to be produced under the arch bending deformation, resulting in problems. Frequent sex is due to our modern building with concrete structures mainly engaged in construction management and technical staff of the steel fabrication and construction technology is relatively unfamiliar to migrant workers mainly construction workers but do not know the specific steel works The scientific construction methods, resulting in the construction process of frequent accidents. Steel Works factory in Dongguan, Zhongshan, steel, Peng Jian Steel Ltd., Dongguan City, Peng Jian provided by steel. Steel Co., Ltd., Dongguan City, Peng Jian (dgpengjian.cn) strong, credible, in Dongguan, Guangdong steel industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Peng built into the brilliant steel and you work for a better future!