Nominal diameter: (nominal diameter), also known as mean outside diameter (mean outside diameter), indicating the symbol DN, is the general diameter of various pipes and pipeline accessories. Pipes and pipeline accessories of the same nominal diameter can be connected to each other and are interchangeable. It is not the outer diameter or inner diameter of the pipe in the actual sense, although its value is close to or equal to the inner diameter of the pipe, in order to make the connection size of pipes and fittings uniform , using the nominal diameter (also known as nominal diameter, nominal diameter). For example, welded steel pipes can be divided into thin-walled steel pipes, ordinary steel pipes and thickened steel pipes according to thickness. Its nominal diameter is neither the outer diameter nor the inner diameter, but a nominal size that approximates the inner diameter of ordinary steel pipes. Each nominal diameter corresponds to an outer diameter, and its inner diameter varies with thickness. The nominal diameter can be expressed in metric mm or in imperial in. Pipeline accessories are also expressed by nominal diameter, which is the same as seamed pipe.

 

 

 

 

Fengbao valve factory is an entity factory with professional production experience and professional manufacturing technology. The company adheres to the business philosophy of "customer-oriented, quality-oriented, attentive service", integrates all kinds of professional advantage resources, and creates cost- effective products. The company has an excellent R & D team, dedicated to creating trustworthy products. Seek new development and create new brand.

 

The core team has gathered professionals with experience in product R & D, production and operation. The company attaches great importance to the growth of its employees while growing up, and has long been committed to the cohesion and improvement of their sense of responsibility, technical level and professional knowledge. The company provides development opportunities and platforms for every excellent employee, provides standardized system training and promotion mechanism, and helps employees to improve and grow in their own work field.

 

The company's products are mainly featured by appropriate price, excellent quality and high cost performance. Company independent research and development, production, unique production, in order to achieve the first- class quality, and favored by the majority of customers!