Cladding and corrosion control method for margin plate at bottom of vertical storage tank

A bottom edge, vertical storage tank technology, applied in the field of anti-corrosion, can solve the problems of low design life of service life, affect the quality of coating construction, difficult to meet anti-corrosion requirements, etc., to save construction time, good airtightness and anti-aging performance , The effect of simple construction method

Active Publication Date: 2014-02-26
上海道盾科技股份有限公司
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Problems solved by technology

In addition, the bottom plate itself has a large number of dead ends such as welds and free edges.
[0005]2. Environmental factors
The coating anti-corrosion technology requires relatively high construction conditions, and the presence of high humidity, high salt content, a...

Method used

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  • Cladding and corrosion control method for margin plate at bottom of vertical storage tank

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with the accompanying drawings, and embodiments of the present invention will be given.

[0041] The steps of the anticorrosion method for coating the bottom edge plate of the vertical storage tank are as follows:

[0042] 1. Mark the construction area and carry out surface pretreatment

[0043] 1) 200mm above the bottom of the tank, the edge plate of the tank bottom is from the T-shaped joint to its edge, and the width of the asphalt sand protective layer is 100mm, and the 200mm protruding part of the concrete base is the cladding area;

[0044] 2) The surface of the steel base at the bottom of the tank is sandblasted to Sa2.5 level, or polished to St2 level or above for derusting treatment, and the corners of the bottom plate are polished to R angle;

[0045] 3) Repair the concrete base, use epoxy resin paint to seal the surface of the concrete base with a primer, the thickness should not be less th...

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Abstract

The invention relates to a cladding and corrosion control method for a margin plate at the bottom of a vertical storage tank. A cladding area covers the part 200mm above the bottom of the vertical storage tank, the part extending from a T-shaped joint of the margin plate at the bottom of the vertical storage tank to the edge of the margin plate, an asphaltic sand protective layer with a width of 100mm, and the part where a concrete base extends outward by 200mm. The cladding area sequentially comprises an anticorrosion paste layer (3), an anticorrosion puddle layer (6), an anticorrosion belt layer (2), polyester fiber cloth (7), an elastic macromolecule anticorrosion layer (9) and a weather-proof surface coating (8) from inside to outside; the polyester fiber cloth (7), the anticorrosion belt layer (2), the anticorrosion puddle layer (6) and the anticorrosion paste layer (3) on the inner layer are all isolated and sealed in an inner wall space formed by the elastic macromolecule anticorrosion layer (9) through the elastic macromolecule anticorrosion layer (9), so that a multi-layer cladding anticorrosion structure with a certain plastic deformation function is formed.

Description

technical field [0001] The invention relates to an anti-corrosion technology, in particular to an anti-corrosion method for coating the bottom edge plate of a vertical storage tank. Background technique [0002] Steel oil storage tanks are essential container facilities for oil storage and transportation in petroleum and petrochemical industries, but they are often corroded by internal and external environmental media during operation. In the corrosion accidents of storage tanks, compared with the tank wall and tank roof, the frequency of corrosion perforation on the bottom plate of the tank is the highest. In the corrosion of the bottom plate of the tank, the corrosion of the edge plate is becoming more and more serious, which has attracted great attention from the production and use units. At present, the bottom edge plates of these storage tanks are often sealed and protected with asphalt sand or cement mortar, but these protection methods will crack after a period of us...

Claims

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Application Information

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IPC IPC(8): B65D90/06B65D90/00
Inventor 黄金钊
Owner 上海道盾科技股份有限公司
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