H-shaped steel beam flange thickness is 20 and so on, there are rolling cross-section, but also by the composite section consisting of three plate welding. Ordinary beam are rolling cross-section, because the production process is poor, inner flange edge has a 1:10 slope. Rolled H-shaped steel beam with only a level different from the common roll, because of its wide flange with no inclination (or slope is very small), and thus should be added a set of vertical rolls simultaneously roll 16 # I-beam, and therefore its rolling mill technology and equipment than the general complexity. China can produce the maximum rolling H beam height of 800mm, more than the combined section can be welded. Single plate: This method is generally used as a raw material of hot-rolled plate Roll, first annealed steel sheet into the pickling plant, sulfuric acid or hydrochloric acid scavenging oxygen hot steel surface galvanizing of metal. Steel pickling immediately after immersion into the tank waiting galvanized channel steel I-beam, which can prevent steel re-oxidation. After pickling and water, squeezed dry, into the zinc pot (temperature remained at 445? 465 ℃) hot dip galvanized and then coated with oil and chromium treatment. This method of production of hot dip galvanized sheet has improved significantly over the wet galvanized product quality, but there is a certain value to small-scale production. Chuzhou beam light beam _ _ Bo Trading Exhibition (certified merchants) are provided by the Hefei exhibition Bo Trading Company. Chuzhou beam light beam _ _ Bo Trading Exhibition (certified merchants) Hefei Show Bo Trading Company (www.hfzhanbo.com) (www.hfzhanbo.com) this year introduced a new upgrade, the above picture is only for reference, please call the contact phone book page or image on to obtain the latest information, contact: Mr. Huang.