A rapid detection and evaluation method for pressure vessels after fire based on hardness and metallography

A pressure vessel and evaluation method technology, applied in the direction of testing material hardness, etc., can solve problems such as complicated operation and pressure vessel damage, and achieve the effects of rapid operation, rapid screening, and high evaluation efficiency.

Active Publication Date: 2016-03-02
HEFEI GENERAL MACHINERY RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

API579 standard program evaluation In the actual operation process, in order to obtain the mechanical properties of the fire pressure vessel material, it is required to take a destructive on-site sampling of the fire pressure vessel, and then use the sample to test the sample in the laboratory, which is not only extremely cumbersome to operate , but also damage to the pressure vessel

Method used

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  • A rapid detection and evaluation method for pressure vessels after fire based on hardness and metallography
  • A rapid detection and evaluation method for pressure vessels after fire based on hardness and metallography
  • A rapid detection and evaluation method for pressure vessels after fire based on hardness and metallography

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Effect test

Embodiment 1

[0043] After a hazardous chemical storage pressure vessel made of 07MnNiMoDR ​​is exposed to fire, it is necessary to conduct a post-fire safety assessment operation to determine whether they are suitable for continued service or downgraded use. Use at this time figure 1 The flow chart of rapid detection and evaluation of the pressure vessel after the fire is shown. Firstly, the hardness of the fire pressure vessel is measured to obtain the hardness distribution of different parts of the pressure vessel; at the same time, the thermal simulation test is carried out with the same material to obtain the change curve of the hardness of the 07MnNiMoDR ​​material with temperature . The specific evaluation steps are as follows:

[0044] 1) According to the fire-fighting measures taken for the pressure vessel during the fire, it is determined that the cooling method of the pressure vessel during the fire is air cooling.

[0045] 2) On-site hardness measurement of the overfired press...

Embodiment 2

[0053] After a certain spherical pressure vessel made of 07MnNiMoDR ​​has been fired, it is necessary to carry out rapid detection and evaluation operations after the fire, so as to determine whether they are suitable for continued service or be scrapped. Use at this time figure 1 The flow chart of rapid detection and evaluation of pressure vessels after fire is shown. Firstly, the hardness of the fire pressure vessel is measured to obtain the hardness distribution of different parts; at the same time, the thermal simulation test is carried out with the same material, and the hardness of 07MnNiMoDR ​​material is obtained. Change curve with temperature. The specific evaluation steps are as follows:

[0054] 1) According to the fire-fighting measures taken for the pressure vessel when the fire broke out, it is determined that the cooling method of the pressure vessel during the fire is air cooling.

[0055] 2) On-site hardness measurement of the overfired pressure vessel, accor...

Embodiment 3

[0060] After a hazardous chemical storage pressure vessel made of 07MnNiMoDR ​​is exposed to fire, a post-fire safety assessment operation is required to determine whether they are suitable for continued service or downgraded use. Use at this time figure 1 The flow chart of rapid detection and evaluation of the pressure vessel after the fire is shown. Firstly, the hardness of the fire pressure vessel is measured to obtain the hardness distribution of different parts of the pressure vessel; at the same time, the thermal simulation test is carried out with the same material to obtain the change curve of the hardness of the 07MnNiMoDR ​​material with temperature . The specific evaluation steps are as follows:

[0061] 1) According to the fire-fighting measures taken for the pressure vessel when the fire broke out, it is determined that the cooling method of the pressure vessel during the fire is water cooling.

[0062] 2) On-site hardness measurement of the overfired pressure v...

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Abstract

The invention belongs to the field of safety evaluation of pressure containers and in particular relates to a method for quickly detecting and evaluating a pressure container after fire based on a hardness and a metallic phase. The method comprises the steps of judging a cooling manner of a burned pressure container in a fire process; arranging a plurality of detection points to perform field detection of hardness; acquiring a temperature critical value of same materials used on the burned pressure container; determining a highest fire tolerance temperature of the burned pressure container when the fire happens; comparing the highest fire tolerance temperature of the burned pressure container with the temperature critical value; performing the operation of repairing or scrapping the burned pressure container when the highest fire tolerance temperature is higher than the temperature critical value, performing metallographic examination, macrographic examination and nondestructive examination on the burned pressure container when the highest fire tolerance temperature is lower than the temperature critical value, and judging whether the burned pressure container is qualified and is free of evaluation. The method is simple and accurate to operate, and capable of performing quick detection and evaluation about the usage of the pressure container after the fire.

Description

technical field [0001] The invention belongs to the field of safety evaluation of pressure vessels, in particular to a rapid detection and evaluation method for pressure vessels after a fire based on hardness and metallography. Background technique [0002] Pressure vessels are widely used in my country's important national economic pillar fields, and the number of pressure vessels is increasing year by year. In recent years, the number of pressure vessel fire accidents in my country's petrochemical enterprises has increased. If a fire occurs in a densely packed and intricate process plant area and some large hazardous chemical storage facilities, such as large crude oil storage tanks, large ethylene spherical tanks, natural gas spherical tanks, liquefied gas balloon tanks, etc., very serious tank damage may occur. Deformation, inclination, leakage and even explosion accidents often cause a large number of casualties, major economic losses or serious environmental pollution...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/54G01N3/40
Inventor 陈学东杨景标范志超艾志斌李蓉蓉王冰关卫和谢铁军郑炯
Owner HEFEI GENERAL MACHINERY RES INST
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