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On April 13, 2016, Hunan Hualing Hengyang Steel Pipe (Group) Co., Ltd. produced 110 tons of 769 IPD marine engineering pipelines X65QOΦ114.3*4.77mm produced by a foreign company in the pipe processing plant 3# line heat treatment once Sexual success, successfully passed the rigorous test.
It is reported that this is the first time that Hengyang Hualing has produced such a thin line pipe for marine engineering. The average length of the pipe is more than 12.2 meters. The production is extremely difficult. It is difficult to control the dimensional accuracy of hot rolling, and the high temperature during heat treatment. The dimensional accuracy caused by the easy deformation is deteriorated, the bending is excessively poor, and the mechanical properties are difficult to control.
In order to ensure the smooth production of this contract, the 180 branch factory, pipe processing branch and technical center have optimized the composition from component design, heat treatment to final straightening process, tracking key processes to ensure process execution. In place.
In the end, this contract was successfully produced once, and the geometrical dimensions and mechanical properties were controlled within the appropriate range. This production not only broadens the product range of Hengyang Hualing high-quality offshore engineering pipe, but also enables Hengyang Hualing technicians to further accumulate experience in the production and tempering heat treatment of high-grade thin-walled pipes, and to follow the high-end offshore pipe market. The development laid a good foundation.