1. General Provisions
Heavy duty apron feeder paint specifications, surface treatment, coating methods, quality assurance will meet the relevant standards.
(1) The paints, finishes, factory and field finishes used by Heavy duty apron feeder will be inspected according to the standard. The bidder will submit the complete inspection report and the paint quality guarantee for the tenderee's confirmation.
(2) The paint and painting method used by Heavy duty apron feeder shall be suitable for the climatic and environmental conditions of the warehouse area. The quality of the paint coating shall be guaranteed for 5 years. If rust, burst, peeling or other problems occur within 5 years due to non-human causes, the seller shall partially repair or repaint these parts free of charge.
2. Surface treatment
(1) Surface treatment standards
A. Heavy duty apron feeder steel surface treatment standard, using the Swedish anti-corrosion Standards Association SIS055900-1967 standard.
B. The surface treatment quality of the main parts and the parts working under humid conditions for a long time will reach Sa21/2 level, that is, more than 95% of the oxide, rust and other dirt on the metal surface per unit area will be removed by sandblasting, so that the surface is close to the metal silver white.
C. The quality of rust removal on the surface of auxiliary parts will reach level S2, that is, all rolled oxide, rust and impurities on the metal surface will be removed, and the surface will be close to light gray.
(2) Surface treatment quality Surface treatment will be strictly implemented in accordance with the above standards, after reaching the specified standards, will also affect the surface of the film quality of oil, water, drug skin, flash burrs, dust and so on all clean. In order to ensure the quality of the surface treatment, the diameter of the steel ball or sand used for surface treatment shall not be greater than 1mm to ensure that the surface after treatment has a certain roughness, and the roughness is not greater than 100 μ.
(3) Repaint
Heavy duty apron feeder Coating damaged during transportation or construction will be repainted. Before repair, the grease and dirt on the surface will be wiped with solvent, and the salt and dust will be removed with clean water, and then the paint will be reapplied. The paint used for the primer, intermediate and top paint of the steel structure and parts painting will be the same type of product as the factory.
The contract equipment needs to be painted on the surface, on the basis of strict surface treatment and correct painting, should also pay attention to the coating process. Whether in the factory or on site, the coating will be strictly in accordance with the coating process, stratification, and under the specified temperature and humidity. Cannot be painted beyond the permitted temperature and humidity. The quality of the surface treatment will be strictly checked, and those that do not meet the requirements cannot be painted. Strictly check the paint certificate, does not have the certificate, expired, shall not be used for painting. Strictly control the coating interval time. Paint film drying process, to keep the surrounding air clean, if there is dust flying, can not paint. Strict implementation of paint mixing, agitation and other regulations. Welding parts can only be painted after 72 hours. When the surface temperature of the steel is higher than 40℃, it shall not be painted. The welds, edges and corners of the welds before the formal coating are brushed with a steel brush. After the finish is qualified, the first coat of paint will be applied within 4 to 6 hours, after which the Heavy duty apron feeder surface will be treated a second time. All paints are airless sprayed by spray gun, and the operating procedures of spray gun are strictly observed. Do not paint outdoors in rainy, snowy, frosty and windy weather. When there is condensation on the treated surface, it shall not be painted. When layered coating is performed, the color of each layer will maintain enough contrast to identify whether the surface is fully covered. The various paints used at the delivery site will be the original packaging at the time of delivery, and their names, instructions, and storage periods are complete. The paint film damaged during transportation and installation will be carefully repainted.
