Ping Ya Industry and Trade to introduce you to security doors can be divided into A, B, C, D, four levels of security doors according to their security level, where the highest grade security performance, followed by B, D the lowest. We are now seeing in the mall are mostly small-class anti-theft security door, it is more suitable for general consumer use of residents. Ping Ya Door Industry and Trade from the material can be divided into five categories: steel, wood and steel structure, stainless steel, aluminum and copper Steel door manufacturer in terms of quality and performance they have their own characteristics, the natural price are not the same. Ping Ya Trade and Industry to remind consumers to buy security doors should pay attention to the following points: (3) Qualified Security door plate thickness should be 1.5mm above the door frame, door thickness 40mm or more in general, you should check the door weight should normally be more than 40kg, and by removing the cat's eye, the doorbell box or lock the door handles, etc. Check the internal structure, the thickness of the steel door should be 0.5mm or more, within a few root reinforcing steel skeleton, the door to the front and rear Panel organically connected together to enhance the overall strength of the steel door entry door, door oh generally polyurethane or high-grade paper honeycomb filler Steel door price, with insulation, soundproofing. Fire doors which should be filled with asbestos (fire cotton) and other materials with fireproof function as a filler, hand percussion door body issued a "pound" sound, consumer hands to open and close the door should be flexible. Fire doors production should promulgate a national production of fire doors Certifications. Steel door manufacturers custom _ _ Guizhou Steel door flat Ya Industry and Trade Co., integrity and dedication provided by the Industry and Trade Yongkang Ya level. Yongkang Ya Ping Ltd. (www.ykpygm.com/) strong, credible, Zhejiang Jinhua doors industry has accumulated a large number of loyal customers. The company better work attitude and constantly improve the level of innovative ideas will lead into the elegant splendor of Industry and Trade and you work for a better future!