保定市硕晟管道加工厂

Common-plate flanged air duct is also called non-blue air duct. Its manufacture form is faster, more convenient and less air leakage than the traditional rectangular air duct. Its advantages are saving materials, reducing project investment, small air leakage, reducing energy consumption, saving operating costs, quite popular with construction enterprises. The developed countries in the United States and Europe have adopted flanged connections since 90s.