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Non-strengthening heat treatment construction technology for over-sized device aerial strength weld

A technology for carrying weld seam and heat treatment temperature, applied in heat treatment furnace, heat treatment equipment, heat treatment process control, etc., can solve problems such as lowering crane parameter level, cylinder deformation, etc. The effect of degree deviation

Inactive Publication Date: 2017-08-15
陕西化建工程有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of large-scale, modularized and automated petrochemical plants, compared with the overall hoisting process, the aerial assembly process of over-limit equipment can not only relieve the pressure of site layout, but also reduce the parameter level of the crane. However, for aerial welding Due to the influence of heating temperature, constant temperature time, weight of equipment on the upper part of the weld, wind load and other factors in the heat treatment of the weld, high temperature stress will inevitably occur at the weld and cause the deformation of the cylinder

Method used

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  • Non-strengthening heat treatment construction technology for over-sized device aerial strength weld
  • Non-strengthening heat treatment construction technology for over-sized device aerial strength weld
  • Non-strengthening heat treatment construction technology for over-sized device aerial strength weld

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Embodiment

[0022] Example: Two propylene rectification towers at a certain site were installed using the aerial assembly process. According to the distribution of the four welds of the two towers, the stress on the section ring seam at the bottom 17.13 meters of the most dangerous T4007 was analyzed.

[0023] 1. First of all, after the butt welding of the overrun equipment is completed in the air, the stress of the bearing weld is calculated and checked at the heat treatment temperature;

[0024] 1. Equipment heat treatment technical parameters

[0025]

[0026] The main technical conditions are detailed in Table 1 below

[0027] Table 1

[0028] Annular seam heat treatment process requirements table 2

[0029]

[0030]

[0031] Table 2

[0032] 2. Tower stability calculation

[0033] The stress on the circular joint of the section at the bottom 17.13 meters of the most dangerous T4007 is analyzed.

[0034] The overall weight of the tower body is 480t, the weight of the tow...

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Abstract

The invention relates to a non-strengthening heat treatment construction technology for an over-sized device aerial strength weld. Along with the fast development of maximization, modularization and automation of a petrochemical device, compared with an overall lifting technology, an over-sized device aerial assembling technology can relieve the pressure of field plane arrangement and can also reduce the parameter grade of a crane; however, high-temperature stress will be certainly generated at the weld position to cause cylinder deformation when the aerial weld is affected by the factors such as the heating temperature, the constant-temperature time, the weld upper portion device weight and the wind load during heat treatment. By means of the non-strengthening heat treatment construction technology for the over-sized device aerial strength weld, targeted safety technological measures are implemented through data mastered through a material high-temperature test under the premise that the device aerial heat treatment weld is not strengthened, the heat treatment quality of the weld is ensured, feasibility of the technology is forcefully verified, and the non-strengthening heat treatment construction technology is worthy of being applied and popularized in the same industry.

Description

technical field [0001] The invention relates to an unreinforced heat treatment application process for air-borne weld seams of overrun equipment. Background technique [0002] With the rapid development of large-scale, modularized and automated petrochemical plants, compared with the overall hoisting process, the aerial assembly process of over-limit equipment can not only relieve the pressure of site layout, but also reduce the parameter level of the crane. However, for aerial welding The heat treatment of the seam is affected by factors such as heating temperature, constant temperature time, weight of the upper part of the weld, wind load and other factors, and high temperature stress is bound to be generated at the weld to cause deformation of the cylinder. In order to verify that the load-bearing weld can meet the mechanical performance requirements of the material, this construction process is proposed and verified with two propylene rectification towers on site. It is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/50C21D1/40C21D11/00
CPCC21D1/40C21D9/50C21D11/00
Inventor 李丽红卫波舒培亮孙长河
Owner 陕西化建工程有限责任公司
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