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A kind of composite material reinforced steel pipe and preparation method thereof

A composite material and steel pipeline technology, which is applied in the field of oil pipeline preparation, can solve the problems of increasing pipeline processing costs and time, and achieve the effect of uniform load ratio and stress reduction

Active Publication Date: 2018-03-13
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

Therefore, the prestressing method not only brings certain risks to the integrity of the pipeline, but also increases the processing cost and time of the pipeline.

Method used

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  • A kind of composite material reinforced steel pipe and preparation method thereof
  • A kind of composite material reinforced steel pipe and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment

[0038] (1) Structural design: as attached figure 1 As shown, the fiber-reinforced layer 3 of this embodiment is selected Kevlar49, and its modulus is 124GPa, and the composite material reinforced layer 4 is selected from E-type glass fiber reinforced epoxy resin, and its modulus is 35-45GPa, compared to the modulus of steel 206GPa , the modulus of Kevlar is closer, so as a reinforcement layer close to the steel pipe, it plays the role of transferring stress. The elongation at break of the fiber-reinforced layer 3 and the composite material-reinforced layer 4 is very close, both about 2%. The similar elongation at break ensures that the two structural layers are destroyed at the same time, and there is no phenomenon that a single structural layer is loaded, which is beneficial to have two Structural layers enhance the effect while playing.

[0039] Due to the hoop stress (σ s ) and axial stress (σ a ) is related by σ s =2σ a , that is, if the requirements of the axial stre...

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Abstract

The invention discloses a composite material reinforced steel pipeline and a preparation method thereof. The composite material reinforced steel pipeline comprises a steel pipe, a fiber reinforced layer and a composite material reinforced layer, wherein the steel pipe is sequentially wrapped by the fiber reinforced layer and the composite material reinforced layer from inside to outside. The reinforced layers of the composite material reinforced steel pipeline are of a two-layer structure, in order to guarantee the proper modulus gradient between the structural layers, the steel pipe is firstly wrapped by the high-modulus fiber reinforced layer, and then the composite material reinforced layer is wrapped by a low-modulus and low-cost fiber reinforced thermosetting resin composite material layer. The high-modulus reinforced layer has the effects of transmitting stress and reducing the steel pipe stress in a pressure bearing state, and the high-modulus reinforced layer and the low-modulus reinforced layer have a bearing effect at the same time. By introducing the high-modulus fiber reinforced layer, the purpose of uniform bearing between the structural layers is achieved.

Description

【Technical field】 [0001] The invention belongs to the technical field of petroleum pipeline preparation, and relates to a composite structure pipeline, in particular to a composite material reinforced steel pipeline and a preparation method thereof. 【Background technique】 [0002] In the field of high-pressure fluid transportation, such as pipeline transportation of natural gas, pipeline steel pipes are most commonly used, but with the gradual increase in the demand for transmission pressure, there are higher requirements for the pressure bearing capacity of pipeline steel pipes. At present, the most commonly used method to improve the pressure bearing capacity of pipelines is to increase the wall thickness of steel pipes or to increase the steel grade. Increasing the wall thickness of the steel pipe not only increases the cost of the pipeline, but also increases the difficulty of welding, transportation and construction of the pipeline. Improving the steel grade of the pip...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L9/14F16L9/16F16L57/00B29C70/34B29C70/70B29K31/00B29K63/00B29K67/00B29K105/06B29L23/00
CPCB29C70/34B29C70/70B29K2031/00B29K2063/00B29K2067/06B29K2105/06B29L2023/22F16L9/14F16L9/16F16L57/00
Inventor 张冬娜戚东涛丁楠邵晓东江汛卞思宸於秋霞
Owner BC P INC CHINA NAT PETROLEUM CORP
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