Concrete-weighed submarine petroleum pipe and its manufacture
An oil pipeline and concrete technology, which is applied in the laying field of submarine oil pipeline insulation pipeline, can solve the problems such as the need to improve corrosion resistance, easy deformation and damage of the insulation layer, poor uniformity and smoothness, etc., and achieves increased corrosion resistance and excellent corrosion resistance. The effect of simple performance and manufacturing method
Active Publication Date: 2008-10-29
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology
[0002] The existing subsea oil pipeline adopts double-layer steel pipe structure, and its disadvantages are that the amount of steel is relatively large, the amount of welding work is large, and the efficiency of pipe laying is low
The existing concrete-weighted submarine oil pipeline adopts spraying method and extrusion winding method to manufacture the concrete weighting layer, the density of the concrete weighting layer is poor, the adhesion is low, the strength fluctuates greatly, and the uniformity and smoothness are poor
The anti-corrosion layer on the surface of the existing submarine oil pipeline steel pipe is easy to damage, and the corrosion resistance needs to be improved. The insulation layer is easily deformed and damaged, which affects the insulation effect. The outer protection layer needs to be further solved.
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[0015] The manufacturing method of the concrete-weighted submarine oil pipeline is characterized in that a steel pipe 1 with a length of 12m, an outer diameter of the pipe of 159mm and a wall thickness of 9mm is preheated, the inner and outer surfaces are sandblasted to remove rust, the inner surface is heated by medium frequency, and the inner surface is sprayed with epoxy powder for internal anticorrosion Layer 3, with a thickness of 0.1mm, spraying epoxy zinc-rich primer layer 4 on the outer surface, with a thickness of 0.1mm, spraying epoxy coal tar anti-corrosion layer 5, with a thickness of 0.2mm, and the reserved welding section 2 at both ends of the steel pipe 1 The length is 140 mm, and discontinuously distributed centering support blocks 11 are installed on the outer surface of the steel pipe 1, and inserted into the plastic steel casing 7 with a thickness of 3 mm, and the polyurethane glass bead insulation layer 6 is poured between the steel pipe 1 and the plastic ste...
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Abstract
This invention relates to a heavy concrete undersea oil pipeline and method of production, including steel pipe (1), reserved welding segment(2), within the epoxy powder coating (3), epoxy zinc-rich bottom paint layer (4), epoxy coal tar coating (5), polyurethane insulating layer of glass beads (6), plastic-steel bushing (7), aluminum grout grouting layer (8), iron ore reinforced concrete pipe (9), polyurea security guards outside layer (10), centering support block (11), tarpaulin (12). Have excellent anticorrosion, insulation performance, protective properties, has good effects on cathodic protection to be able to reduce steel, insulation materials, construction is simple and can be used for undersea pipeline .
Description
technical field [0001] The invention relates to a concrete-weighted submarine oil pipeline and a manufacturing method thereof, which are used for laying submarine oil pipelines with thermal insulation. Background technique [0002] The existing submarine oil pipeline adopts a double-layer steel pipe structure. The disadvantages are that the amount of steel is relatively large, the amount of welding work is large, and the pipe laying efficiency is low. The existing concrete-weighted submarine oil pipeline adopts spraying method and extrusion winding method to manufacture the concrete weighting layer. The concrete weighting layer has poor density, low adhesion, large strength fluctuation, poor uniformity and smoothness. The anticorrosion layer on the surface of the steel pipe of the existing submarine oil pipeline is easy to be damaged, and the corrosion resistance needs to be improved. The insulation layer is easily deformed and damaged, which affects the insulation effect. ...
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IPC IPC(8): F16L9/14F16L58/04F16L59/14F16L13/02
Inventor 丁新龙秦延龙袁中立陈国祥李春张长民杨玉霞唐海燕
Owner BC P INC CHINA NAT PETROLEUM CORP