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dwtt sample and method for avoiding dwtt abnormal fracture of large wall thickness and high toughness x80 steel pipe

A high-toughness, steel pipe technology, applied in the direction of applying stable shear force to test material strength, sampling, strength characteristics, etc., can solve problems such as test failure, and achieve the effect of eliminating abnormal fractures and DWTT abnormal fractures

Active Publication Date: 2021-06-01
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for modern X80 high-strength, high-toughness, and large-wall-thickness pipeline steel pipes, a large number of abnormal fractures appeared in the traditional DWTT test, which led to the failure of the test

Method used

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  • dwtt sample and method for avoiding dwtt abnormal fracture of large wall thickness and high toughness x80 steel pipe
  • dwtt sample and method for avoiding dwtt abnormal fracture of large wall thickness and high toughness x80 steel pipe
  • dwtt sample and method for avoiding dwtt abnormal fracture of large wall thickness and high toughness x80 steel pipe

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Embodiment Construction

[0040] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", "side", "end", "side" etc. is based on the Orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0041] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Conn...

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Abstract

The invention discloses a DWTT sample and a method thereof for avoiding the abnormal fracture of the X80 steel pipe with large wall thickness and high toughness. , There is a wire cutting notch on the welding bead. It can eliminate the DWTT abnormal fracture of X80 steel pipe with large wall thickness and high toughness.

Description

technical field [0001] The invention belongs to the technical field of material toughness testing, and in particular relates to a DWTT sample and a method thereof which avoid the abnormal fracture of the DWTT of a large wall thickness and high toughness X80 steel pipe. 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 economy of pipeline transportation, the development trend of natural gas pipelines is high pressure, large diameter, large wall thickness, and large transmission capacity, and the steel pipes used are also developing in the direction of high steel grade (high strength grade). Pipeline steel pipes for natural gas pipelines in my country have developed very rapidly in recent years. After the success...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N3/24B23P15/00
CPCB23P15/00G01N1/286G01N3/24G01N2203/006G01N2203/0274
Inventor 李鹤封辉胡美娟李为卫黄卫锋章传国
Owner BC P INC CHINA NAT PETROLEUM CORP
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