China Quality News Network News October 15, 2021, the official website of the State Administration for Market Regulation announced the results of the national supervision and spot check on the quality of sucker rods and their coupling products. This time, a total of 52 batches of sucker rods and their connections were produced by 40 companies in 12 provinces, autonomous regions, and municipalities including Tianjin, Inner Mongolia, Liaoning, Jilin, Heilongjiang, Jiangsu, Shandong, Henan, Shaanxi, Gansu, Ningxia, and Xinjiang. Hoop products. The spot check found that 4 batches of products did not meet the requirements of the standard, involving the items of tensile strength, reduction of area, and coupling hardness.
This spot check is based on the requirements of SY/T 5029-2013 "Sucker Rods", SY/T 5550-2012 "Hollow Sucker Rods" and API 11B. Sucker rod yield strength, sucker rod elongation, sucker rod section reduction, sucker rod integral thread tensile strength, rod diameter, HY type sucker rod surface hardness, sucker rod minimum thread size, sucker rod Maximum thread size, parallelism of the shoulder surface of the external thread, the width of the sucker rod wrench, the tensile strength of the polished rod, the yield strength of the polished rod, the elongation of the polished rod, the reduction of the polished rod body diameter, the surface hardness of the HY-type polished rod, the minimum thread Size (sucker rod thread), maximum thread size of polished rod (sucker rod thread), parallelism of the shoulder surface of polished rod external thread (sucker rod thread), polished rod surface roughness, polished rod coating hardness, tensile strength, sucker Overall rod thread tensile strength, lower yield strength, elongation, reduction of area, rod outer diameter, HY hollow sucker rod surface hardness, hollow sucker rod coupling hardness, minimum thread size, maximum thread size, external thread Shoulder surface parallelism, internal thread end surface parallelism, hollow sucker rod wrench square width, hollow sucker rod coupling wrench square width, coupling hardness, coupling outer diameter, SM-class coupling spray welding layer hardness, coupling 43 items including the maximum thread size, the minimum thread size of the coupling, the parallelism of the end face of the internal thread, and the square width of the coupling wrench were tested.
Among them, the sucker rod coupling products of our company have passed the sampling inspection.
