What is s355 plate use

s355 plate, Large diameter spiral steel pipe refers to the relatively large diameter spiral steel pipe, which is generally required to be more than 1000mm. The manufacturing process of large-diameter spiral steel pipe: first, the steel strip is bent into shape, and then welded together to make a large-diameter spiral steel pipe of specified size. After being processed into a pipe, hydrostatic test, bending, flattening and other tests shall be carried out, and the internal steel support of large-diameter spiral steel pipe can be made according to customer requirements.

In the year of 2015, customer from Peru oil refinery contact with us from Internet. After one month's negotiation and quotation, they chose us as there supplier of raw steel plate s355 plate grade ASTM A36. We get an trail order of 300 tons in April. When the first ship arrived, they inspect the steel plate and very happy with the quality we supply. Then they put another 1700 tons order, we sent to them within 90 days. Our company management group visit the customer in the beginning of 2016 and the visit is very successful.

In order to obtain the seamless tube with smaller size and better quality, the method of cold rolling, cold drawing or the combination of the two must be used. Cold rolling is usually carried out on a two high mill, and s355 plate pipes are rolled in a circular pass composed of a variable cross-section circular groove and a fixed conical head. Cold drawing is usually carried out on single chain or double chain cold drawing machines of 0.5-100t.

When carrying out s355 plate thick plate gas cutting, the cutting nozzle and the workpiece surface remain vertical. After the whole section is cut through, the cutting nozzle is moved to normal gas cutting. When the gas cutting is about to reach the end point, the speed should be slightly slowed down, so that the lower part of the incision is completely cut.