Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A method to avoid abnormal fracture of x90/x100 pipeline steel drop weight sample

A technology of X90 and pipeline steel, which is applied in the direction of testing the strength of materials by using one-time impact force to achieve the effect of eliminating abnormal fractures, avoiding abnormal fractures, and increasing the crack propagation speed

Active Publication Date: 2021-08-27
BC P INC CHINA NAT PETROLEUM CORP +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For X90 / X100 steel pipes, due to the further improvement of its smelting process and purity, even in the case of thin wall thickness (below 21.4mm) and low toughness (below 300J), there will still be a large number of abnormal fractures

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
  • A method to avoid abnormal fracture of x90/x100 pipeline steel drop weight sample
  • A method to avoid abnormal fracture of x90/x100 pipeline steel drop weight sample
  • A method to avoid abnormal fracture of x90/x100 pipeline steel drop weight sample

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] The invention provides a method for avoiding the abnormal fracture of the X90 / X100 pipeline steel drop weight sample. Firstly, the ordinary DWTT sample is processed according to the general standard, and then the initial crack is prefabricated at the root of the sample gap, and a back groove is added on the back of the sample. , increase the hammering energy during the DWTT test to ensure that the fracture morphology of the X90 / X100 steel pipe DWTT sample is a normal fracture.

[0036] The invention discloses a method for avoiding abnormal fractures of X90 / X100 pipeline steel drop hammer samples, comprising the following steps:

[0037] S1, DWTT sample processing

[0038] According to Q / SY GJX 101 "General Technical Conditions for Gas Transmission Steel Pipes", cut out the standard DWTT sample 1 (305mm in length, 76.2mm in width, and the wall thickness is the original wall thickness of the steel pipe), and press it with a special tool with a cutting edge angle of 45° T...

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 discloses a method for avoiding the abnormal fracture of the X90 / X100 pipeline steel drop hammer sample. The DWTT sample is processed according to the general standard, and then a crack is prefabricated at the root of the notch of the DWTT sample, and a back groove is added on the back of the DWTT sample. In order to ensure that the fracture morphology of the X90 / X100 steel pipe DWTT sample is a normal fracture, the DWTT test is carried out. The DWTT sample prepared by the method of the invention presents the characteristics of being brittle first and then tough, and can effectively eliminate abnormal fractures.

Description

technical field [0001] The invention belongs to the technical field of material toughness testing, and in particular relates to a method for avoiding abnormal fractures of X90 / X100 pipeline steel drop hammer samples. Background technique [0002] Natural gas is a kind of clean energy, and it is also a flammable and explosive dangerous medium. Once the high-pressure natural gas pipeline cracks for a long time, it will cause huge disasters and losses. Therefore, the safety of the pipeline must be guaranteed. In order to improve the economics of pipeline transportation, the development trend of natural gas pipelines is to develop in the direction of high-grade steel (high-strength grade). Since 2000, Canada has taken the lead in carrying out the full-scale blasting test of the X100 pipeline in the world, and built the X100 test section. Since 2012, PetroChina has set up a major special project of "Research on Key Technologies of the Third-Generation Large-Transportation Natura...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/30
Inventor 李鹤池强封辉陈宏达邵晓东章传国黄卫锋
Owner BC P INC CHINA NAT PETROLEUM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com