Aluminum welding technology technical difficulties low melting point of aluminum, high thermal conductivity, heat capacity, thermal expansion coefficient. Aluminum and has a great affinity for oxygen, which can cause the weld oxide inclusions. ③ aluminum in the liquid can absorb large amounts of hydrogen seamless tubes, aluminum welding and therefore easy to generate pores. ④ aluminum and its alloys the heating temperature reaches the melting point, from a solid into a liquid when the process is fast, and no color change Shandong seamless tubes, it will be difficult to stage a production installation for welding ×) windows and wall openings Standards should be controlled around the gap between the 25mm-40mm, the maximum size should not exceed 50mm, a minimum of not less than 20mm Jinan seamless tubes manufacturer, window frames and the outer walls have a certain distance, or should use fine aggregate concrete pouring pound trimmed before installation construction, prohibited the use of poor quality masonry, mud-brick or mortar directly sintered pad level; b) according to the project circumstances a reasonable choice of cement mortar filling method, the first, the first mortar and then filled in the aluminum cavity wall mount and a second filling; the second is the aluminum frame fixed before filling mortar. Both methods have advantages and disadvantages, first ensure that the cavity is not formed aluminum hollowing phenomenon, but is easy to produce in the secondary filling cracks and leakage; second method is easy to form the lower sides of the border and it is difficult to avoid Filling dissatisfaction form hollowing phenomenon; c) filling cement mortar to control the mixing ratio of cement mortar factory in Shandong seamless tubes, generally 1: 2.5, to ensure the quality of cement mortar waterproofing agent is recommended to add cement mortar cement mortar to improve The anti-leakage performance, pay attention to maintenance, to avoid cracking; d) border around the outer wall of windows and doors 300mm range, increasing Erdao waterproof coating applied to reduce the chance of water leakage; prices Shandong seamless tubes, rolls Alcoa ( online consultation), seamless tubes provided by the Aluminum Co., Ltd. Jinan Heshun. Jinan Heshun Aluminum Co., Ltd. (www.jnhsly.com) (www.jnhsly.cn) in the field of aluminum products devoted boundless enthusiasm and passion, rolls Alcoa has been customer-centric, for customers to create the concept of value, quality, service to win market, and sincerely hope to cooperate with the community to create success, to create brilliant. Related businesses welcomed the inquiry, Contact: Zhang.