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Hydraulic pressure expansion liner corrosion resistant alloy composite tube and manufacturing method thereof

A technology of corrosion-resistant alloy and manufacturing method, which is applied in the field of hydraulic expansion-lined corrosion-resistant alloy composite pipe fittings and its manufacture, can solve problems such as large process limitations, size restrictions, and unsuitability for promotion, and achieve easy promotion and solution construction desired effect

Inactive Publication Date: 2014-02-12
BAOJI PETROLEUM STEEL PIPE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Composite pipes through diameter expansion, explosive composite, etc. have certain defects in pipe performance and life, and their size is also limited.
At the same time, its process has relatively large limitations, and it has special requirements for equipment and venues, so it is not suitable for promotion.

Method used

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  • Hydraulic pressure expansion liner corrosion resistant alloy composite tube and manufacturing method thereof
  • Hydraulic pressure expansion liner corrosion resistant alloy composite tube and manufacturing method thereof
  • Hydraulic pressure expansion liner corrosion resistant alloy composite tube and manufacturing method thereof

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Experimental program
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Effect test

preparation example Construction

[0039] The invention according to figure 1 Process for the preparation of steel pipes.

[0040] (1) Outer tube preparation:

[0041] Cutting to length: Cut the base pipe to a certain length according to the product size specification requirements;

[0042] Inner surface inspection: Strictly check the quality of the inner surface of the base pipe to avoid defects that affect the bonding quality of the inner and outer pipes;

[0043] Inner surface treatment: Shot blasting is performed on the inner surface;

[0044] Purge and dry: purge and dry the inner surface for later use.

[0045] (2) Liner preparation

[0046] Pipe making: the stainless steel strip is rolled into a pipe blank, which is welded by TIG or plasma welding, the quality and shape of the weld are strictly controlled, and grinding is carried out if necessary;

[0047] Cutting to length: the qualified steel pipes are cut according to the requirements of the length;

[0048]Surface treatment: pickling treatment ...

Embodiment 1

[0057] steel number C Si mn P S Cr Ni Cu Mo Nb V Ti N X65 0.05 0.215 1.175 0.017 0.002 0.028 0.011 0.033 0.006 0.039 0.05 0.015 / 2205 0.024 0.572 1.63 0.009 0.002 22.8 5.76 / 3.12 / 0.024 / 0.13

[0058] YS(Rt0.5), MPa TS, MPa Elongation, % 460 555 43 465 565 40 460 565 42

Embodiment 2

[0060]

[0061]

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Abstract

The invention discloses a hydraulic pressure expansion liner corrosion resistant alloy composite tube which is composed of a corrosion resistant alloy inner tube and a mild steel outer tube. The corrosion resistant alloy inner tube and the mild steel outer tube are assembled and liquid pressure is applied on the interior thereof after the assembly to cause the outer surface of the corrosion resistant alloy inner tube and the inner surface of the mild steel outer tube to be tight connected. The wall thickness of the corrosion resistant alloy inner tube is 1-4mm, and the outer diameter of the corrosion resistant alloy inner tube is 70-600mm. The wall thickness of the mild steel outer tube is 6-15mm, and the outer diameter of the mild steel outer tube is 76-610 mm. The composite tube has the beneficial effects that by adopting the method disclosed by the invention, an oil and gas gathering and transporting pipeline can be built for a severe corrosion area, and the method has no special requirements on sites and technologies, so the generalization is convenient.

Description

Technical field: [0001] The invention belongs to the manufacturing industry of steel pipes for oil and gas transportation, and relates to a hydraulic expansion-bonded inner-lined corrosion-resistant alloy composite pipe fitting and a manufacturing method thereof. Background technique: [0002] Statistics show that since 2000, my country's annual corrosion loss has exceeded 500 billion yuan, accounting for about 5% of the gross national product, and pipeline corrosion has accounted for a considerable proportion of it. The experience and statistical data of developed countries show that more than a quarter of the rust loss can be controlled by anti-corrosion means. As long as effective anti-corrosion measures are taken, the service life of equipment and equipment can be extended, and new anti-corrosion equipment, new technologies, new processes, and new materials can be actively promoted and used. Our country can reduce at least 30% of corrosion losses and recover hundreds of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L58/00F16L9/14B23P11/02
CPCF16L58/08B23P11/022F16L9/02
Inventor 毕宗岳牛辉张万鹏刘海璋杨军赵红波张君刘斌牛爱军黄晓辉陈长青包志刚
Owner BAOJI PETROLEUM STEEL PIPE
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