Heat treatment of cold drawn seamless steel pipe (1)cold drawn steel annealing refers to the metal material is heated to the appropriate temperature, to maintain a certain time, and then slowly cooled heat treatment process. Common annealing process are recrystallization annealing, stress relieving, ball annealing, fully annealed and so on.
Brief Introduction of Large Diameter Seamless Steel Pipes The large diameter seamless steel pipe has a hollow section, which can transport a large number of fluid, such as the transportation of oil, natural gas, gas, water and some solid materials pipelines. Compared with round steel and other solid steel , the steel pipe has a smaller diameter . Large Diameter Seamless Steel PipeLarge-diameter seamless steel pipe are those with an outer diameter exceeding 100 mm, wall thickness greater than 0.2, and the outer diameter of a pipe , and large-diameter seamless steel pipes are pierced with steel ingots or solid pipes , and then hot-rolled, cold -rolled, or cold dialed. At present, China's large-diameter seamless steel tubes mainly produce large-diameter seamless steel tubes.
Vishal Steel (India) is the most acclaimed manufacturer, exporter, distributor and supplier of industrial Large Diameter Stainless Steel Pipe with required test certificates. You can also Order small quantities, we will be happy to quote best price for small and large quantities & can Seamless tube, Seamless pipes, Cold drawn seamless Seamless Pipe & Tubing is subdivided as Cold Drawn Seamless , or CDS, exhibits precise tolerances and a good surface finish. Hot Finished Seamless , or HFS, has less critical tolerances and somewhat scaly finish and is not as strong as CDS. For Drawn over Mandrel, or DOM tubing, the first stages of manufacturing are identical to ones used to Cold Drawn Large Diameter Seamless Rectangular Steel Pipe
The cold drawn black steel pipe you can find on the site are generally built using hot-dipped technology to prevent rusting and weakening of the structural elements. With seamless welding quality, these cold drawn black steel pipe are annealed with nitrogen protection and are polished with utter professionalism. These products are made of Cold Drawn Large Diameter Seamless Rectangular Steel Pipe
Large diameter cold -drawn precision tube Cold Drawn or Cold Rolled Precision Seamless Steel Pipe Precision pipe is a kind of seamless steel pipe with high precision and brightness, which is produced by cold drawing or cold rolling process.Its inner and outer diameter size can be accurate to within 0.02 mm, precision steel tube inside and outside wall without oxidation layer, under high Cold Drawn Large Diameter Seamless Rectangular Steel Pipe