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Acid-resistant pipeline steel and pipe making method

A pipeline steel and steel plate technology, applied in the metallurgical field, can solve the problems of acid corrosion of crude oil, low transportation cost and low transportation speed, and achieve the effects of preventing corrosion, inhibiting hydrogen sulfide corrosion, and tightly bonding

Inactive Publication Date: 2018-09-18
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Iran, Myanmar, India, Abu Dhabi, Russia, and other countries have huge crude oil reserves. my country imports more and more crude oil from these regions. Pipeline transportation not only has low transportation costs and fast transportation speed, but there is acid corrosion of crude oil through pipelines. Therefore, it is imminent to research and develop anti-acid pipelines of different specifications, and it has always been a challenge to be able to apply anti-acid stability of different specifications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The chemical composition of an acid-resistant pipeline steel and its production method provided in this example is shown in Table 1.

Embodiment 2

[0020] The chemical composition of an acid-resistant pipeline steel and its production method provided in this example is shown in Table 1.

[0021] The chemical composition (wt%) of table 1 embodiment 1, embodiment 2

[0022]

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PUM

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Abstract

The invention discloses acid-resistant pipeline steel and a pipe making method, and relates to the field of steel and iron materials. The acid-resistant pipeline steel comprises the chemical compositions of, by mass, 0.014%-0.024% of C, 0.10%-0.35% of Si, 0.60%-0.80% of Mn, less than or equal to 0.012% of P, less than or equal to 0.0010% of S, 0.030%-0.070% of Nb, 0.006%-0.020% of Ti, 0.10%-0.30%of Ni, 1.00%-1.10% of Cr, 0.15%-0.20% of Mo, 0.10%-0.30% of Cu, 0.010% of V, 0.015%-0.050% of Al, and the balance Fe and impurities. According to the acid-resistant pipeline steel and the pipe makingmethod, unique composition design is adopted, pipe making is carried out through edge milling, prebending, forming, welding, flaw detection, hole enlargement and hydraulic testing and other processesto meet the pipe making requirements of the acid-resistant pipeline steel.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to an acid-resistant pipeline steel and a pipe-making method. Background technique [0002] Iran, Myanmar, India, Abu Dhabi, Russia, and other countries have huge crude oil reserves. my country imports more and more crude oil from these regions. Pipeline transportation not only has low transportation costs and fast transportation speed, but there is acid corrosion of crude oil through pipelines. Therefore, it is imminent to develop anti-acid pipelines of different specifications, and it has always been a challenge to be able to apply anti-acid stability of different specifications. [0003] The acid-resistant and corrosion-resistant pipeline steel is mainly resistant to HIC and SSC. Hydrogen sulfide is a weakly acidic electrolyte. It exists in the form of molecules in aqueous solutions with a pH of 1 to 5. Hydrogen sulfide reacts with metals: H 2 S+Fe→FeS+2H generates atomic hydrogen, H 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/48C22C38/50C22C38/44C22C38/42C22C38/46C22C38/06
Inventor 翟冬雨
Owner NANJING IRON & STEEL CO LTD
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