Common knowledge of coating: how to identify the quality of fireproof paint

Core tip: fireproof varnish, also known as transparent fireproof coating, is a kind of common fireproof coating developed in recent years and tends to mature after adding pigments, which is mainly used for fire protection of high-grade wood decorative materials and steel structure surfaces of buildings or structures The products shall meet the requirements of GB 12441-1998 general technical conditions for facing fire retardant coatings and gb14907-2002 general technical conditions for fire retardant coatings for steel structures At present, the commonly used Fire-Retardant Paints in China are all expansion type, which are mainly used for the surface of wood decorative materials When coated with fireproof paint Shenyang steel structure fireproof coating construction expert punde Building Fire Engineering Co., Ltd Recommended introduction: since its establishment, Shenyang punde Construction Fire Engineering Co., Ltd has cultivated a group of professional construction teams with excellent equipment, rich experience and serious responsibility with advanced and scientific management methods and strict engineering quality assurance and after-sales service system It has undertaken a number of fire system installation projects, which has been praised by customers Every idea and special requirement of you will be fully considered by us and fully realized in the construction technology, which will become the cornerstone of our successful long-term development We are looking forward to your invitation, to provide you with quality services and high-quality technical support! All construction coatings have passed ISO9001 Home of coatings news: fireproof varnish, also known as transparent fireproof coating, is a kind of common fireproof paint developed in recent years and tends to mature after adding pigments, which is mainly used for fire protection of high-grade wood decorative materials and steel structure surfaces of buildings or structures The products shall meet the requirements of GB 12441-1998 􀂫 general technical conditions for decorative fire retardant coatings and gb14907-2002 general technical conditions for fire retardant coatings for steel structures At present, the commonly used Fire-Retardant Paints in China are all expansion type, which are mainly used for the surface of wood decorative materials When the surface of the object coated with fireproof paint meets fire, the fireproof scribble can rapidly expand in a short period of time and delay the development of combustion The appearance of fire-proof paint is very similar to that of common paint, which is difficult to distinguish from the appearance, and it is also difficult to check the quality of fire-proof paint on site In the experimental project, the fire supervision departments at all levels can distinguish by the following methods (1) Check whether the product has the qualified inspection report issued by the national fire quality inspection center, or check online At present, the form approval system of fire-fighting products is implemented for fire-fighting paint The fire-fighting paint sold on the market should have the form approval certificate of national fire-fighting products and the form inspection qualification report (2) According to the national standard, in addition to meeting the requirements of fire resistance, the combustion performance of fire retardant paint is divided into two levels Under the specified experimental conditions, the fire resistance time of the first level fire retardant paint shall not be less than 20min, and the fire resistance time of the second level fire retardant paint shall not be less than 10min (3) At present, domestic enterprises produce the fire retardant paint with the fire performance reaching the second level, and the cost price is more than 8000 yuan / ton If the sales standard is lower than this, the quality is worrying (4) The on-site construction of fire-retardant paint shall be subject to the manufacturer's product packaging instructions Generally, it does not need to be diluted with water, and the painting shall be carried out on the site The painting amount shall not be less than 500g / M 2 (5) The product quality can be preliminarily inspected on the site: cut two or three small samples on the constructed base material, or take a small number of samples to be painted on the plywood, and paint according to the actual construction situation Under normal circumstances, the construction shall be carried out according to the specified amount (generally 500g / M 2) The thickness of the foam layer of the first level fire retardant paint is more than 20m m, and that of the second level fire retardant paint is more than 10mm The foam layer shall be uniform and dense After drying out, use the flame of alcohol lamp to check The flame height is about 40mm, and the time of applying flame is generally 20min Check the foaming of coating It can also be tested with a blowtorch When the fire-retardant paint is burned by strong fire, it will expand in a large amount, gather on the surface, and there will be no burning loss in a few minutes, while the fake and inferior fire-retardant paint will not foam basically, and there will be a large number of scattered slag dropping, and the wood base material will be burned and damaged soon (6) In practice, in order to ensure the fire resistance and other performance of the fire retardant paint, it is generally necessary to use transparent coating The consumption of fireproof paint is generally 350-500g / M 2, and the consumption of cover coating is generally 50g / m2 Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,