Natural gas pipe with corrosion resisting inner layer and machining process thereof

A technology of natural gas pipeline and processing technology, applied in the field of natural gas pipeline equipment, can solve problems such as affecting natural gas transportation capacity, damage, noise, etc., and achieve excellent anti-HIC performance and improve toughness.

Inactive Publication Date: 2017-04-26
ENG EQUIP CO LTD SUZHOU SAI SIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the process of natural gas transportation, there are often problems such as leakage and noise caused by corrosion or installation defects, which cause great troubles to people.
Being in a noisy environment for a long time is prone to dizziness, tinnitus and other phenomena, and more serious mental illnesses will occur, which will cause great harm to the physical and mental health of the human body. At the same time, due to the differences between geographical environments, some places, such as The temperature in Northeast China is low in winter, and natural gas pipelines are exposed to the environment, corroded by rainwater, and prone to damage, and the low temperature environment directly affects the natural gas transportation capacity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment provides a natural gas pipeline with an anti-corrosion inner layer. The pipeline includes a steel pipe body and a corrosion-resistant layer arranged on the inner wall of the steel pipe. The chemical composition mass percentage of the steel pipe body is: C: 0.041%, Cr: 8.65 %, Si: 0.12%, Mn: 1.26%, Co: 0.22%, V: 0.031%, Re: 0.31%, Al: 0.17%, Ti: 0.021%, Zr: 0.31%, Ca: 0.004%, Ni: 0.21 %, Mo: 0.15%, P ≤0.020%, S ≤0.015%, rare earth element: 0.23%, the balance is Fe and unavoidable impurities; the chemical composition mass percentage of the rare earth metal is: Pm: 11%, Ho : 4%, Lu: 18%, Dy: 7%, Gd: 3%, the balance is La;

[0034] The parts by weight of the components contained in the corrosion-resistant layer include: 23 parts of epoxy resin, 17 parts of yttrium micropowder, 5 parts of ceramic micropowder, 6 parts of silicon carbide, 4 parts of polyvinyl chloride, 6 parts of xylene formaldehyde resin parts, 5 parts of zinc citrate, 1 part of sodium formal...

Embodiment 2

[0040] This embodiment provides a natural gas pipeline with an anti-corrosion inner layer. The pipeline includes a steel pipe body and a corrosion-resistant layer arranged on the inner wall of the steel pipe. The chemical composition mass percentage of the steel pipe body is: C: 0.043%, Cr: 8.75 %, Si: 0.12%, Mn: 1.37%, Co: 0.27%, V: 0.032%, Re: 0.33%, Al: 0.17%, Ti: 0.022%, Zr: 0.37%, Ca: 0.005%, Ni: 0.21 %, Mo: 0.18%, P ≤0.020%, S ≤0.015%, rare earth element: 0.25%, the balance is Fe and unavoidable impurities; the chemical composition mass percentage of the rare earth metal is: Pm: 14%, Ho :5%, Lu: 20%, Dy: 9%, Gd: 5%, the balance is La;

[0041] The parts by weight of the components contained in the corrosion-resistant layer include: 25 parts of epoxy resin, 18 parts of yttrium micropowder, 6 parts of ceramic micropowder, 7 parts of silicon carbide, 6 parts of polyvinyl chloride, 7 parts of xylene formaldehyde resin 6 parts, 6 parts of zinc citrate, 2 parts of sodium form...

Embodiment 3

[0047] This embodiment provides a natural gas pipeline with an anti-corrosion inner layer. The pipeline includes a steel pipe body and a corrosion-resistant layer arranged on the inner wall of the steel pipe. The chemical composition mass percentage of the steel pipe body is: C: 0.045%, Cr: 8.85 %, Si: 0.13%, Mn: 1.47%, Co: 0.31%, V: 0.033%, Re: 0.35%, Al: 0.18%, Ti: 0.023%, Zr: 0.42%, Ca: 0.006%, Ni: 0.22 %, Mo: 0.21%, P ≤0.020%, S ≤0.015%, rare earth element: 0.26%, the balance is Fe and unavoidable impurities; the chemical composition mass percentage of the rare earth metal is: Pm: 16%, Ho : 7%, Lu: 21%, Dy: 10%, Gd: 6%, the balance is La;

[0048] The parts by weight of the components contained in the corrosion-resistant layer include: 27 parts of epoxy resin, 19 parts of yttrium micropowder, 7 parts of ceramic micropowder, 8 parts of silicon carbide, 7 parts of polyvinyl chloride, 8 parts of xylene formaldehyde resin parts, 7 parts of zinc citrate, 3 parts of sodium form...

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Abstract

The invention discloses a natural gas pipe with a corrosion resisting inner layer. The pipe comprises a steel pipe body and a corrosion resisting layer arranged on the inner wall of the steel pipe body; and the steel pipe body comprises the following chemical components in percentage by mass: 0.041-0.045% of C, 8.65-8.85% of Cr, 0.12-0.13% of Si, 1.26-1.47% of Mn, 0.22-0.31% of Co, 0.031-0.033% of V, 0.31-0.35% of Re, 0.17-0.18% of Al, 0.021-0.023% of Ti, 0.31-0.42% of Zr, 0.004-0.006% of Ca, 0.21-0.22% of Ni, 0.15-0.21% of Mo, P not more than 0.020%, S not more than 0.015%, 0.23-0.26% of rare earth element, and the balance of Fe and inevitable impurities. Dispersed and compounded fine oxide particles are formed in steel through reasonable low-carbon no-niobium component design and through a smelting process based on an oxide metallurgy technology; and the high-temperature thermostable fine dispersed inclusion particles are used for pinning austenitic grain boundary of a welding heat affected zone under high heat input conditions to refine austenitic grains.

Description

technical field [0001] The invention relates to a pipeline and its processing technology, in particular to a natural gas pipeline with an anti-corrosion inner layer and its processing technology, belonging to the technical field of natural gas pipeline equipment. Background technique [0002] The pipelines that transport natural gas from mining sites or processing plants to urban gas distribution centers or industrial enterprise users are called natural gas pipelines, also known as gas transmission pipelines. The use of natural gas pipelines for natural gas transportation is the only way to transport large quantities of natural gas on land; if the lengths of all pipelines in the world are connected together, the length of natural gas pipelines accounts for about half of the total length, which shows the importance of natural gas pipelines in life and production sex. [0003] In the process of natural gas transportation, there are often problems such as leakage and noise cau...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/52C22C38/46C22C38/50C22C38/44C21D8/10C09D163/00C09D5/10C09D7/12
CPCC22C38/005C08L2205/035C09D5/10C09D7/61C09D7/63C09D7/65C09D163/00C21D8/105C22C38/002C22C38/02C22C38/04C22C38/06C22C38/44C22C38/46C22C38/50C22C38/52
Inventor 陈平
Owner ENG EQUIP CO LTD SUZHOU SAI SIDE
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