Api5ct casing can be divided into seamless and welded steel tubes, welded steel tube mainly refers to the straight seam steel pipe, large diameter casing is generally straight seam submerged arc-welded steel tubes. Mainly used for transportation of oil, natural gas, coal gas, water and other liquids and gases. The main applications of the product, mainly distributed in the Middle East, Europe and North America. Api5ct according to the length of the casing can be divided into R-1,R-2 and R-3, three kinds of specifications. http://www.sellsteels.com/steel-pipe/API-5CT.html
