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Paper-plastic composite airbag for pipeline welding argon filling plugging and preparation method of airbag

A technology of paper-plastic composite and air bag, which is applied in the direction of welding equipment, welding medium, pipe/pipe joint/pipe fitting, etc., to achieve the effect of improving welding quality, high gas barrier property and low cost

Active Publication Date: 2020-02-28
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The main purpose of the present invention is to provide a method for overcoming the shortcomings and disadvantages of the existing pipeline welding Ar gas protection scheme, and overcoming the shortcomings of the existing pipelines as a whole filled with argon or using sealing discs and soluble paper. Paper-plastic composite airbag for pipeline welding and filling with argon

Method used

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  • Paper-plastic composite airbag for pipeline welding argon filling plugging and preparation method of airbag
  • Paper-plastic composite airbag for pipeline welding argon filling plugging and preparation method of airbag

Examples

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Effect test

Embodiment 1

[0022] Disclosed is a paper-plastic composite airbag for pipeline welding and filling with argon, which is prepared from polyvinyl alcohol, organic defoaming agent, glycerin, flame retardant, water and other components. Its preparation method comprises the following steps:

[0023] (1) Under normal temperature and pressure, dissolve 158.4g of polyvinyl alcohol in 1,320ml of water containing 15g of glycerol, stir at 1000rpm for 10min, add 7.5g of silicone defoamer dropwise, dissolve and keep warm for 2~ 2.5 hours. Then add 180g of flame retardant and 0.1g of isothiazolinone antifungal and fungicide into the solution, stir thoroughly for 20min until completely dissolved and evenly dispersed. Stop stirring and stand for 2h.

[0024] (2) Cut the paper into 10-inch circles according to the pipe size. Uniformly coat a layer of the solution prepared in step (1) on its surface, and heat it at 95° C. to make it completely dry.

Embodiment 2

[0026] Disclosed is a paper-plastic composite airbag for pipeline welding and filling with argon, which is prepared from polyvinyl alcohol, organic silicon defoamer, triethanolamine, flame retardant, water and other components. Its preparation method comprises the following steps:

[0027] (1) Under normal temperature and pressure, dissolve 162g of polyvinyl alcohol in 1350ml of water containing 15g of glycerol, stir at 1000rpm for 10min, add 7.5g of silicone defoamer dropwise, dissolve and keep warm for 2 to 2.5 hours . Then add 7.5g of triethanolamine and 150g of flame retardant to the solution, stir well for 20min until completely dissolved and evenly dispersed. Stop stirring and stand for 2h.

[0028] (2) Cut the paper into a 12-inch circle according to the pipe size. Uniformly coat a layer of the solution prepared in step (1) on its surface, and heat it at 95° C. to make it completely dry.

[0029] (3) Step (2) was repeated to prepare 3-layer and 4-layer paper-plastic...

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Abstract

The invention provides a paper-plastic composite airbag for pipeline welding argon filling plugging and a preparation method of the airbag. The paper-plastic composite airbag for plugging is composedof a multi-layer paper-plastic composite film. The multi-layer paper-plastic composite film is composed of a water-soluble outer blocking layer / a paper layer / a water-soluble inner blocking layer or formed by repeatedly laminating the structure units above. The two sides of the paper layer are coated with water-soluble blocking materials, and the paper layer can always keep its strength. Accordingly, the paper-plastic composite airbag is endowed with good stiffness, folding resistance and gas barrier property. The paper-plastic composite airbag is bonded to a pipeline through a high-temperature-resistance adhesive to form a high-gas-barrier-property high-heat-stability welding argon filling plugging material. The efficient and reliable argon protection atmosphere can be formed in the limited pipeline of the space, the welding quality and mounting work efficiency are effectively improved, and the construction period is effectively shortened. The paper-plastic composite airbag can be applied to welding construction for gold welded junctions and extra-long-distance pipeline joints of the pipeline and equipment.

Description

technical field [0001] The invention relates to the field of offshore oil engineering, in particular to a paper-plastic composite airbag for pipeline welding and argon-filled sealing and a preparation method thereof. Background technique [0002] With the depletion of global terrestrial oil resources, offshore oil will gradually replace land oil as the main source of human oil and gas resources in the future. It is estimated that 1 / 3 of the world's oil and gas reserves may be on the continental shelf and 1 / 3 in the deep sea. During the development of offshore oil and gas fields, offshore deepwater oil (gas) pipelines often need to be welded on site. The ambient atmosphere during welding will have a great impact on the welding quality. Therefore, ocean deep-water oil (gas) pipelines need to have perfect gas protection measures during welding, otherwise the welding quality will be affected; during the welding process, it is necessary to fill the entire pipeline with argon ga...

Claims

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Application Information

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IPC IPC(8): F16L55/10B23K35/38C09D5/14C09D5/18C09D129/04
CPCF16L55/10C09D129/04C09D5/14C09D5/18B23K35/383
Inventor 杨利营刘秀支印寿根
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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