With the constant development of industrial technology, the industrial equipment also has been developed rapidly. As a newly developed heat exchange tube with high efficiency, the nodes heat exchange tube has replaced the traditional ones. This new heat exchange tube has some unique advantages.   1. High coefficient...

According to the applications, seamless steel pipe can be classified into several major types.   1. GB/T8162-1999: structure seamless steel pipes. This type of pipe mainly used in general structure and mechanical structure. The representative materials are: carbon steel, steel of NO.20 and 45, alloy steel of Q345,...

This article introduces the extensive applications of ductile iron pipes in detail.    1. Fire protection Ductile iron pipes have three times of safety factor in design, not only can protect the whole fire protection system, the fire valves and fire hydrants are also completely made of ductile iron pipes which...

This article introduces several major types of welded pipes, including their applications and standards in detail.   1.Welded pipe for delivering low-voltage fluid (GB/T3092-1993). This kind of pipe also known as general welded pipe, or black pipe, which is mainly used for delivering low-voltage fluid, including water,...

Chemical cleaning: chemical cleaning of pipe refers to temporarily transformation of the pipeline using chemical agents, adopt chemical cyclic cleaning using temporary pipeline and circulating pump station from both ends of the pipeline. The technology has features such as strong flexibility, high speed, thorough cleaning...

Stainless steel pipe and other products will undergo forming, welding and heat treatment in the manufacturing process, which makes the surface contaminated. Therefore, the passivation treatment is an important and indispensable process. Basically there are following common methods in actual application. Oxide skin removing...

In general, hardness indicators of Brinell, Rockwell and Vickers hardness index are adopted to measure the hardness of steel. 1. Brinell Hardness In stainless steel tube standard, Brinell Hardness is the most commonly used, often impress diameter is applied to express the hardness of the material, which is intuitive and...

Seamless steel pipe is a kind of strip steel with hollow section and no seams around. Steel pipe has a hollow section, a large number of which are used as pipes transforming fluid, such as oil, natural gas, coal gas, water and some solid materials, and so on. Compared with solid steel such as round steel, steel pipe is...

Stainless steel pipe fitting materials can't contact with other metals directly when lifting, non-metallic materials such as wood or rubber sheet should be padded. Arc striking and arc stopping of stainless steel pipe fittings: back welding method should be adopted for arc striking and must be made within the groove,...

Production process of spiral steel pipe is complex, but it is one of the most popular steel pipes because it can be used widely. Spiral steel pipes are produced through welding process, then what issues should be noticed in the welding process? Let’s find out these questions one by one. Straight seam welded pipes...