Manufacturing method of duplex stainless steel coil for oceanographic engineering umbilical cable
A duplex stainless steel and marine engineering technology, applied in the field of marine equipment, can solve the problems that restrict the development of deep-sea oil and gas fields, do not have the ability to design, analyze, and manufacture umbilical cable systems, and achieve high production efficiency and precise production length.
Inactive Publication Date: 2017-05-31
ZHEJIANG JIULI HI TECH METALS
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Problems solved by technology
For a long time, the umbilical cables used in my country have all relied on imports, and the key technology research on this product is still blank, and there is no ability to design, analyze, and manufacture umbilical cable systems. These have restricted my country's deep-sea oil and gas fields to a certain extent. to develop
Method used
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Experimental program
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Embodiment Construction
[0024] The material grade of the product selected for the implementation project is S32750, which represents a seamless tube with an outer diameter of Φ14.7 mm, a wall thickness of 1 mm, and a single length of more than 10 meters. The seamless tube manufacturing method is a round tube billet through hot extrusion + cold rolling + Manufactured by bright heat treatment.
[0025] A specific embodiment of the method of the present invention comprises the following steps,
[0026] Step 1, butt jointing of the pipe bodies, adjusting the butt joint ports of the two pipe bodies to be docked on the radial plane along the mutually perpendicular X-axis and Y-axis until the axial axes of the two pipe bodies overlap and move closer;
[0027] Step 2, pipe body welding, use the welding head to drive the tungsten electrode to rotate along the periphery of the splicing seam of the two pipe bodies to complete the welding;
[0028] Step 3, welding seam trimming, using grinding equipment to perf...
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Abstract
The invention relates to a manufacturing method of a duplex stainless steel coil for an oceanographic engineering umbilical cable. The method comprises the following steps: S1, pipe body butt joint: adjusting butt joint ports of two pipe bodies needed to be in butt joint along the axis and the Y axis which are vertical to each other in a radial plane till the axial axes of the two pipe bodies are overlaid and drawn close; S2, pipe body welding: using a welding head to drive a tungsten electrode to rotate along the periphery of a joint crack of the two pipe bodies to realize welding; S3, weld joint finishing: using a grinding device to rotatably grind the periphery of a weld joint; S4, weld joint detection: using an X-ray real-time image detection head to annularly detect the weld joint in a circular manner for judging the welding reliability of the weld joint; S5, using a pipe coiling machine to coil the welded forming pipe to form a coil; and S6, performing a water pressure test of 100MPa on the coil; and when the yield strength of the coil is greater than 550MP and the tensile strength of the coil is greater than 800MPa, the coil is qualified. The method provided by the invention is high in production efficiency and accurate in production length.
Description
technical field [0001] The invention relates to the field of marine equipment, in particular to a method for manufacturing duplex stainless steel coiled pipes for marine engineering umbilical cables. Background technique [0002] The umbilical cable is generally composed of cables, optical fibers, steel pipes for transporting chemical agents and hydraulic fluids, external protective layers (steel pipes and composite materials), etc., ranging from hundreds of meters in length to tens of thousands of meters in length. It is mainly used to transport chemical agents, hydraulic fluids, electricity and signals, etc., and is the lifeline of offshore oil and gas production systems. Once the umbilical cable is damaged, it will have a huge impact on the entire system, and damage to the internal components of the umbilical cable will interrupt communication and affect the control of the entire production system. [0003] Deep sea umbilicals consist of many tubes. Usually the innermos...
Claims
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IPC IPC(8): B23P15/00B23K9/032B23K101/06
CPCB23P15/00B23K9/032B23K2101/06
Inventor 丁文炎王坤夏正文张春芬徐伟华
Owner ZHEJIANG JIULI HI TECH METALS