Qingdao Weijing Environmental Protection Technology Co., Ltd. is a specialized company specializing in the production, sales, installation and renovation of spiral air ducts and accessories, and is located at the south head of Shuangyuan Road, Chengyang District, Qingdao (near the former Shuangbu toll station). The company has a 4000m2 factory building, equipped with a series of equipment such as spiral air duct production line, hydraulic elbow machine, electric plate bending machine, full-automatic flange machine, seam welding machine and other equipment, with an annual processing capacity of 2000 tons, can produce 0.5-2.0mm thickness of any diameter of the spiral duct and all kinds of duct fittings, at the same time can process the production of fan sound box and muffler and other wind system auxiliary equipment.

Qingdao Weijing Environmental Protection Technology Co., Ltd. is a modern and innovative enterprise with rich experience and expertise in the field of ventilation pipes.

Weijing ventilation system starts from a single accessory, we provide an infinite possibility to complete the whole ventilation system solution, and to do the installation is simple, economical and environmentally friendly. We can even provide only a few rivets, it is entirely up to the user to decide what level of business to hand over to us.

Our main product areas are circular piping systems and accessories, ventilation technology products and ventilation system installation services. Our piping systems are divided into plug-in installation and flange installation, and we can provide rubber ring seals according to customer needs. All designs reflect "shorter installation time, lower energy consumption and less air leakage". As a supplement to this product series, we also provide common plate flange air ducts and accessories; fan silent box, muffler, muffler elbow, muffler straight pipe, chimney hood, etc.

Vein's products are recyclable because they are easy to separate, rebuild or disassemble.