Method for safety assessment of high density polyethylene material after fire

A high-density polyethylene and safety evaluation technology, applied in the field of performance evaluation of polymer materials, can solve the problems of reduced structural safety, deterioration of high-density polyethylene structural performance, no high-density polyethylene pipeline evaluation method, etc. The effect of time and cost

Inactive Publication Date: 2016-11-09
FUDAN UNIV
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large range of fire burning, the polymer materials near the fire site will also be affected by thermal radiation.
After thermal radiation, the properties of polymer materials will change, the structural properties of high-density polyethylene will deteriorate, and the structural safety will decrease
After a fire

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for safety assessment of high density polyethylene material after fire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0028] Example 1: If figure 1 As shown, the present invention provides a reasonable and practical method for evaluating the performance of high-density polyethylene materials after being exposed to fire. Below by embodiment the inventive method is further described:

[0029] After a high-density polyethylene pipeline is damaged by fire, it is necessary to evaluate its performance after fire to assess whether it can continue to serve. Follow these steps:

[0030] (1) First, conduct on-site inspection of the environment where the pipeline is located, and obtain the heat exposure temperature, heat exposure time and cooling method of the material during the fire. The heat exposure temperature and heat exposure time were 100°C and 8h, respectively, and the cooling method was air cooling.

[0031] (2) Take the same unfired pipe material as the fire-fired pipe to conduct thermal aging experiments to simulate the performance change of the pipe after fire. The experimental paramete...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the field of assessment of the performances of polymer materials, and concretely relates to a method for detecting and evaluating the performances of a high density polyethylene material after a fire. The method comprises the following steps: simulating the fire damage condition of the material to obtain the mechanical performance indexes of the material at a certain temperature at a certain time; and carrying out impact fracture analysis and microscopic examination (comprising infrared analysis and thermal analysis) on the fire damaged material, and judging that whether the mechanical performances of the material are obviously decreased or not, whether the material obviously oxidized or not and whether the material can be continuously used or not according to the examination result. The method comprehensively evaluates the performance change condition of the material after fire by combining the macroscopic mechanical performance change of the material with the microstructure change of the material and utilizing various modern analyzers. The method can accurately judges that whether the material is continuously used or not, can effectively reduce the replacement time and the replacement cost of high density polyethylene pipelines after fire hazard, and has practical reference values in the evaluation of the performances of other polymer materials after fire damages.

Description

technical field [0001] The invention belongs to the field of performance evaluation of polymer materials, in particular to a method for detecting and evaluating the performance of high-density polyethylene materials after being exposed to fire. Background technique [0002] With the implementation of the "West-to-East Gas Pipeline" strategy, gas pipelines have become more popular, and the gas pipeline network has developed rapidly in my country. Compared with the disadvantages of easy corrosion and short service time of metal pipes, high-density polyethylene pipes are considered to be the best for their high specific strength, low brittle temperature, good toughness, corrosion resistance, good insulation performance, and easy construction and installation. At present, it is an ideal gas pipe. [0003] As an energy transmission system, gas pipelines will directly affect people's daily life if there are quality problems, especially the leakage of gas will cause the danger of ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01N33/44
CPCG01N33/442
Inventor 杨振国郭思敏
Owner FUDAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap