Construction method of steel-jacketed steel steam direct burial pipeline

A technology for pipeline construction and steel sheathing, which is used in pipeline laying and maintenance, pipes/pipe joints/fittings, and mechanical equipment. Sign accurate effect

Inactive Publication Date: 2020-05-22
POWER CHINA HENAN ENG CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0005] Steel jacketed steel steam direct buried pipeline has the characteristics of saving floor space and reducing the underground space occupied by the pipeline network, especially when the urban underground space is occupied by various pipeline infrastructure and the space is relatively narrow, this advantage is more obvious; Steel-sheathed steel steam direct buried pipelines are mainly used in long-distance buried heat pipe network projects. The pipeline construction is mainly long-distance bur...

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  • Construction method of steel-jacketed steel steam direct burial pipeline
  • Construction method of steel-jacketed steel steam direct burial pipeline

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Embodiment Construction

[0081] Below in conjunction with accompanying drawing, the present invention will be further explained and illustrated:

[0082] see figure 1 with figure 2 , a steel jacket steel steam direct buried pipeline construction method is characterized in that: comprising the following steps:

[0083] A. Construction preparation:

[0084] 1) Prepare the materials required for construction, and check and accept the pipelines, pipe fittings, pipeline accessories and valves required for construction;

[0085] 2) Clear the obstacles on the construction site, and measure and set out the construction site;

[0086] a. Select different excavation sections according to factors such as construction site conditions, structure burial depth, soil quality, and presence or absence of groundwater;

[0087] b. Determine the construction measures such as the bottom width of the pipe ditch, the slope of the pipe ditch, the side slope, the position of the platform, the width of the upper mouth, the...

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Abstract

The invention discloses a construction method of a steel-jacketed steel steam direct burial pipeline. The method comprises the following steps of construction preparation, pipeline transportation andhoisting in place, working pipe butt-joint installation, working pipe butt-joint welding, working pipe welded junction inspection, working pipe hydraulic pressure test, outer protection pipe and working pipe temporary fixing and dismounting, working pipe welded junction corrosion prevention and heat preservation, outer protection pipe joint welding, outer protection pipe joint welding inspection,outer protection pipe joint corrosion prevention, pipe ditch backfilling, and working pipe purge. According to the method, the whole set of mature and systematic construction method is continuously improved in the actual installation and construction process, the construction method is detailed in content, reasonable in standard requirement preparation, simple in process and reasonable in procedure, compared with conventional installation, the construction period is shortened, equipment machine-team use is saved, consumed materials are saved, the working efficiency is improved, material lossesare correspondingly reduced, the construction cost is reduced, civilized construction is facilitated, improvement of environmental protection measures is facilitated, labor, equipment and material cost are saved, and good economic benefits, social benefits and environmental benefits are generated.

Description

[0001] 1. Technical field: [0002] The present invention relates to a construction method for direct-buried steel-sheathed steel thermal pipelines, in particular to a construction method for direct-buried steel-sheathed steel steam pipelines, which is applicable to the fields of petroleum, natural gas, chemical industry, electric power, military industry, pharmacy, papermaking, heat supply, etc. Inner steel sheathed steel steam direct buried pipeline construction. [0003] 2. Background technology: [0004] With the strengthening of environmental governance in our country, centralized heating has begun, resulting in a large number of long-distance heat external pipe network projects; traditional thermal external pipe network projects are basically divided into overhead laying and trench laying; among them, overhead laying, The pipelines are criss-crossed, occupy a large area, affect the city appearance, and are extremely inconsistent with the modern civilization of the city; w...

Claims

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Application Information

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IPC IPC(8): F16L1/028
CPCF16L1/028
Inventor 王海波李乐军邢双喜魏杭军尚路光赵东
Owner POWER CHINA HENAN ENG CO LTD
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