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...

Precise stainless steel pipe refers to stainless steel pipes with austenitic organization in normal temperature. Stainless steel tubes contain about 0.1% C, 18% Cr, 8% ~ 10% Ni, with stable austenite organization. Common heat treatment technologies are: solution treatment, stabilizing treatment and stress relief treatment. ...

Corrosive forms of sanitary stainless steel tubes mainly includes crevice corrosion, pitting corrosion, balanced corrosion,  intergranular corrosion and stress corrosion, etc. Crevice Corrosion Crevice corrosion refers to local corrosion caused by electrochemical imbalance of the medium in the seams of sanitary ...

Precise stainless steel pipe is safe and reliable, sanitary and environment protecting and affordable. Thin wall of pipe and successful development of new methods for reliable, simple and convenient connection endow it with many irreplaceable advantages. And the application in project will be more and more frequent and...

Welding technology of stainless steel welded pipe is significant.  Some knowledge is introduced as follows to ensure you have a better understanding of stainless steel welded pipe.  As for what is included, please read on. A. Equipment a. If it is argon arc welding, then direct current infusible argon arc welding...

Hot dip galvanizing can protect steel pipes very well. When zinc is in liquid state, plate the steel with a thick layer of pure zinc after the complicated physical and chemical interaction and thus will make the hot dip galvanizing come into being. Also a zinc and steel alloy layer will be generated during this process....