Profile: Tianjin Nolite Steel Group is engaged in manufacturing and exporting steel products. We are an ISO 9001:2008 certified company. We specialize in producing electric resistance welded and spiral submerged arc welded pipes. Electric resistance welded steel pipe is used for low pressure liquid delivery such as water, gas, and oil. It is also used for oil drilling and machinery manufacturing services. The surface of the steel pipe is subjected to fusion bond epoxy coating, coal tar epoxy, vanish coating, and bitumen coating. Casing is a large-diameter pipe that serves as the structural retainer for the walls of oil and gas wells, or well bore. It is inserted into a well bore and cemented in place to protect both sub-surface formations and the wellbore from collapsing, and to allow drilling fluid to circulate. Steel casing pipes have a smooth wall & minimum yield strength of 35,000 psi.