L80 13Cr Tubing Pipe 4-1/2in 13.50ppf Premium Thread
L80-13cr is martensitic stainless steel. L80-13cr martensitic stainless steel pipe is a representative product of oil well pipe used in wet CO2 environment. It adopts the product of American Petroleum Association (API) standard. L80-13cr has been listed in apispec5ct (casing and tubing specification). Because of its excellent CO2 corrosion resistance and relatively low cost, it is a promising corrosion-resistant material for oil field.
The specially thickened 2Cr13 steel pipe needs heat treatment to meet the performance requirements of l80-13cr However, due to the difference between the end and the pipe body and the narrow performance range of L80 steel grade, a series of difficulties have been brought to the actual production From the point of view of heat treatment process, the heat treatment scheme of the product is put forward: 990 ℃ normalizing + 770 ℃ tempering, tempering time 1 h; Due to the influence of inner and outer thickened ends, the air quenching of pipe body needs to add fans at the ends; Heating time reaches 160 min; The tempering temperature control deviation is controlled within ± 5 ℃, which meets the needs of mass production
