Repair method of marine gas transmission metal pipeline
A metal pipe and repair method technology, applied to pipe components, pipes/pipe joints/fittings, mechanical equipment, etc., can solve the problems of easy deformation of metal pipes, low repair efficiency, heavy repair workload, etc., and achieve fast detection and measurement Convenience, high repair efficiency, and small repair workload
Active Publication Date: 2020-06-09
ZHEJIANG OCEAN UNIV
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Problems solved by technology
[0003] The purpose of the present invention is to overcome the defects that the current metal pipeline cracks are repaired by welding, which has a large repair workload, low repair efficiency, and easy deformation of the metal pipe after repair, and provides a repairing method with a small repair workload and high repair efficiency. High, metal pipeline repair method for marine gas transmission without deformation after repair
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[0013] The present invention will be further described below in conjunction with the accompanying drawings.
[0014] See attached figure 1 , a method for repairing an ocean gas transmission metal pipeline, first install a working cabin at the crack 2 of the underwater metal pipeline 1; step 1, detect and measure the crack, and determine the shape and size of the crack; step 2, place the crack at the tip of the crack Drill the anti-crack hole 3 and tap the thread, screw in the anti-crack bolt 4 coated with adhesive in the anti-crack hole, cut off and polish the excess part of the anti-crack bolt higher than the metal pipe wall; step 3, on the metal pipe wall Make a number of repair grooves that intersect with the cracks respectively, and insert repair parts equal to the number of repair grooves one by one into the repair grooves and perform riveting. The repair parts produce plastic deformation and mesh with the repair grooves and fill the repair grooves; steps 4. Initially gr...
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The invention relates to a marine gas transmission metal pipeline repair method. First, a working cabin is installed at the position of a crack of an underwater metal pipeline, the marine gas transmission metal pipeline repair method comprises the steps that step 1, the crack is detected and measured; step 2, crack stopping holes are manufactured at the tips of the crack and tapping is carried out, and crack stopping bolts coated with a binding agent are screwed into the crack stopping holes; step 3, a plurality of repair grooves correspondingly intersected with the crack are manufactured, andrepair parts with the same number as the repair grooves are embedded into the repair grooves one by one and riveted; step 4, excess parts, higher than the metal pipeline wall, of the repair parts arepreliminarily polished; step 5, a plurality of reinforcing holes are manufactured at the joints between the side edges of the repair parts and the side edges of the repair grooves and tapping is carried out, and u-bolts coated with a binding agent are screwed into the reinforcing holes in a one-to-one-correspondence mode for reinforcing; and step 6, the u-bolts and the parts, higher than the metal pipeline wall, of the repair parts are ground and leveled. According to the marine gas transmission metal pipeline repair method, repair work amount is small, the repair efficiency is high, and themetal pipeline after repair does not produce deformation.
Description
technical field [0001] The invention relates to the field of repairing metal components, in particular to a method for repairing an ocean gas transmission metal pipeline. Background technique [0002] Natural gas is often transported through pipelines; long-distance metal pipelines for marine natural gas are not only affected by changes in the ocean’s hydrological environment and seabed, but may also be damaged by various human underwater and underwater activities; when cracks occur in metal pipelines, it is difficult to repair them , the repair time is long, if it is not repaired in time, it will easily leak and pollute the environment, causing heavy economic losses; when the metal pipe is cracked and damaged, it is often repaired by welding. When repairing, first install the working cabin underwater. The working cabin is equipped with a power supply, Lighting, communication, lifting, gas source, welding construction equipment, life support system, etc., and then inject hig...
Claims
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IPC IPC(8): F16L55/168
CPCF16L55/168
Inventor 王亚宁沈哲伦宋文东纪丽丽蔡璐郭健
Owner ZHEJIANG OCEAN UNIV