Coating technology of coating of flange sealing surface

A technology of flange sealing and coating process, applied in the direction of coating, damage protection, pipeline protection, etc., can solve the normal operation obstacles of oil-water treatment equipment and transportation pipelines, destructive accidents, and destroy the anti-corrosion system of oil-water treatment equipment and transportation pipelines Integrity and other issues, to solve the problem of anti-corrosion protection, eliminate the effect of slight deformation

Active Publication Date: 2016-07-20
CHINA NAT OFFSHORE OIL CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the premature corrosion of the contact sealing surface of the flange, it not only destroys the integrity of the overall anti-corrosion system of the oil-water treatment equipment and transportation pipeline, but also seriously hinders the normal operation of the oil-water treatment equipment and transportation pipeline, and may lead to destructive accidents

Method used

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  • Coating technology of coating of flange sealing surface
  • Coating technology of coating of flange sealing surface
  • Coating technology of coating of flange sealing surface

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Experimental program
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Effect test

Embodiment Construction

[0033] like figure 1 — Figure 5 Shown, the present invention adopts following steps:

[0034] The first step: sandblasting the sealing surface of the flange 9;

[0035] Step 2: Apply a release agent on the surface of the sealing water line 5 on the sealing surface of the mold 8, the connecting fastening bolt 11, and the surface of the ejection bolt 10;

[0036] Step 3: Brush the paint on the surface of the sealing water line 5, and scrape the paint flat on the basis of the plane where the connecting bolt hole 2 is located; at the same time, brush the paint on the sealing surface of the flange 9 to make the middle part of the flange 9 form a bulge The "ridges" of the paint, and then scrape the paint evenly;

[0037] Step 4: Hang the lifting point 1 on the mold 8 by the hook of the crane, then, hold the handle 7 on the crane to adjust the angle, and use the positioning pin 6 to align with a lifting bolt hole 3 of the flange 9, and insert positioning;

[0038] Step 5: Use t...

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Abstract

The invention discloses a coating technology of a coating of a flange sealing surface. The coating technology comprises the steps of I, carrying out sand blasting on the flange sealing surface; II, smearing the surfaces of a sealing water wave line, connecting fastening bolts and mold drawing bolts on a sealing surface of a mold with a mold release agent; III, smearing the sealing water wave line surface and the flange sealing surface with paint, enabling the middle part of the flange to form a raised peak ridge, and then scraping the paint to the flat; IV, locating the flange; V, fastening the mold and the flange together, and cleaning the overflowing paint; VI, after a coating is solidified, carrying out mold drawing; VII, detecting the flatness and profile of the water wave-shaped sealing coating of the flange sealing surface; VIII, carrying out sand blasting on the sealing surface of a matched flange; IX, smearing the surface of the flange sealing surface coating with the mold release agent; X, smearing the sealing surfaces of the flange and the matched flange with paint, and scraping the paint to be flat; XI, fastening the flange and the matched flange, controlling the thickness of the coating, and cleaning the overflowing paint; and XII, after the coating is solidified, carrying out mold drawing. According to the coating technology, pressure resistant coating protection can be carried out on the pressure bearing sealing surface, and the problem of long-acting corrosion protection is solved.

Description

technical field [0001] The invention relates to a coating coating process, in particular to a coating coating process for a flange sealing surface. Background technique [0002] At present, inside oil-water treatment equipment and transportation pipelines, there are usually corrosive acids, alkalis, salts and other media. For oil-water treatment equipment and transportation pipelines, flange contact sealing surfaces need to be especially vigilant against crevice corrosion and galvanic corrosion. This situation is particularly prominent in strong corrosive environments such as high temperature and high chloride ions. [0003] Due to the existing spraying process, the coating of the contact sealing surface of the flange can only produce waterline coverage, but cannot form a pressure-bearing profile. Therefore, the contact sealing surface of flanges in oil and water treatment equipment and transportation pipelines is one of the most severely corroded positions. Due to the pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L58/18F16L58/14F16L58/08F16L58/10
CPCF16L58/08F16L58/10F16L58/14F16L58/187
Inventor 陈伟军仲继彬储乐平张念涛许小波李华山单景刚李晋王维肖易萍
Owner CHINA NAT OFFSHORE OIL CORP
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