As a clean energy, compressed air is second only to electric power in the importance of factories and enterprises. The air compressor forms a complete compressed air system through pipelines, valves and other equipment. Improper design, calculation and installation of Dalian compressed air pipeline will affect the economy and reliability of the whole system, and even bring serious destructive accidents.

It has important theoretical significance and practical value to study CMT fusion brazing welding of aluminum alloy and galvanized steel dissimilar metals in Dalian compressed air pipeline. In this paper, the cold metal transition (CMT) welding and brazing of aluminum alloy and galvanized steel dissimilar metal sheet lap joint is carried out for the lightweight structure manufacturing of aluminum alloy and galvanized steel dissimilar metal in the automotive industry.

Is the recommended value of compressed air flow rate in the main gas transmission pipeline (or main pipeline); For pipelines or pipeline accessories with a length of less than 1m, the inlet and outlet of coolers, purification equipment, pressure vessels, etc. are limited by the installation size, and the instantaneous gas flow rate can be appropriately increased.

Personally, the formula cannot be mechanically copied, depending on the specific situation of Dalian compressed air pipeline. For example, if the instantaneous consumption of a certain gas consumption point is large, the pipe diameter of the main pipe is usually enlarged, which is equivalent to the buffering effect of the gas storage tank. "Appropriate flow rate" is not necessarily "economic flow rate". Strictly speaking, there are many aspects such as pressure drop calculation.