When you buy stainless steel door takes note of the first to check if the door to buy a refurbished old Chongqing KTV avoiding a trap door that, in the street a few shops selling security doors will recycle some of the old security doors, then refurbished then sell. To verify that the door is not a refurbished old can watch turnkey process. Under normal circumstances, the new security door packaging is intact, installers face in front of the customer's package, the key should be in the package inside, key packaging should be complete, to be installed in front of the customer's face lock cylinder, mounted After the lock, then the key to the customer. But if the door of the packaging itself is damaged KTV stainless steel door, and the key installed in the pockets of workers, there may be refurbished door. Second, the check is not made of paper security door security door made of paper little people staggering, and some surface with steel security door, but the sandwich filler is filled into the paper. There are dealers, the state could have been made of paper filler, but this must be a paper honeycomb paper. But now the market does have some manufacturers do this with an ordinary cardboard filler. Although the use of honeycomb paper is possible, but it is generally low-grade stainless steel door shelf, because it does not soundproof insulation. Fairly standard filler is blowing agents, can heat, noise, fire performance disadvantage is worse, but you can achieve security. Slag wool is a little better. Stainless steel products, how to remove the oxide layer welds produced with a pointed head knock, knock on the head smooth, no depression or sharp areas, the scale went off. Welded stainless steel is mainly used in the interface, two stainless steel tubes To docking, will spend the welding method, we in the selection of welding consumables, when stainless steel door, be sure to select a matching stainless steel welding consumables, small is not recommended carbon steel welded stainless steel welding consumables. Using plating methods to remove the oxide layer welding points studied the composition of the oxide layer, we can first oxide layer of the epidermis pretreated, alkaline nitrates melt such that the oxide layer becomes soft, and then in the cleaning pads, achieve smooth welds, cleaning purposes. We can first use the most practical way, that is diluted with water with detergent after welding soaked, then water erosion. If the weld oxide layer can not be removed, then we can use diluted sulfuric acid soaked, due to sulfuric acid has a strong corrosive, so we must control soaked time, usually not too long, and then use water to flush. Chongqing welding stainless steel processing welding temperature is higher, immediately after welding rod melted melted together and welded stainless steel products, stainless steel, while its surface is simultaneously oxidized black of ferric oxide and iron oxide in the slag, which oxide layer is extremely difficult to dissolve in acid, if it is too long in acid etching, the site will not weld too bad to erosion, affecting both the normal deposition of the coating, but also make stainless steel products were plated physicochemical function to influence. Acceptance welding pieces of stainless steel products are mainly black iron welding inspection at the presence and removal method. Stainless steel door _ Chongqing Yao Yi Stainless Steel Products Co. (Certified) _ stainless steel supplied by Yao Yi Stainless Steel Products Co., Ltd., Chongqing. Stainless Steel Products Co., Ltd. Chongqing Yi Yao (www.shudumy.com) is Chongqing Municipality, stainless steel and products of leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Yao Yi leader in stainless steel with the staff warmly welcome all inquiries to discuss and create art Yiu stainless steel a better future.