Seamless pipe
① Oil well pipe, also known as oil special pipe, is the basis of the oil industry, casing, tubing and drill string components (drill pipe, drill collar, kelly, etc.) collectively referred to as oil well pipe (OCTG). The commonly used brands are J55, K55 and L80.
② Ordinary structural pipe, commonly used for 20#, 45#, Q355, etc., commonly used for steel structure production, power tower and mechanical processing.
③ Alloy seamless pipe is a kind of seamless steel pipe, its performance is much higher than the general seamless steel pipe, because this steel pipe contains more Cr, its high temperature resistance, low temperature resistance, corrosion resistance is not comparable to other seamless steel pipes, so the alloy pipe is widely used in petroleum, chemical, electric power, boiler and other industries.
