Aluminum and aluminum alloy, when exposed to air, will soon form a strong adhesion and thermal oxide films. In Jinan before welding aluminum manufacturer, which must be carefully remove the oxide film layer to the welding, the matrix and filler metal fusion good; when the fiber welding, brazing has good mobility. The solvent was removed the oxide film can be used, but also under an inert atmosphere, is removed by the action of the welding arc, or removed by mechanical or chemical methods. Aluminum windows and doors leak prevention and control 1, the design and preparation stage a) early intervention, to participate in the drawings joint hearing on the design defects, proposed to deepen the design requirements; b) the structural design according to strict specifications and design calculations based on the engineering characteristics of Jinan Aluminum, do not simply apply; c) the characteristics of a model based on the engineering construction window, do the preliminary prevention, process control, test phase watertight; before d) production, honestly physical performance testing to determine whether the doors and windows meet the design requirements and performance indicators; e) Try to use the same manufacturer Shandong Aluminum suppliers, the same series of window profiles, do not simply pieced together, try to use a high frame retaining section, increase the seal passes and adding windows and doors windows and doors lock point; Shandong Aluminum Alloys Suppliers | rolls Aluminum | Aluminum Aluminum Co. rolls provided by Jinan. Jinan Heshun Aluminum Co. (www.jnhsly.com) Shandong Jinan, aluminum products leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Aluminum leadership in cis with the staff warmly welcome all inquiries negotiations to create a better future for aluminum rolls.