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A kind of production method of corrosion-resistant bimetal composite pipe

A technology of bimetallic composite pipe and production method, which is applied in the field of bimetallic composite straight seam pipe, can solve the problems that are difficult to be used in the preparation of large-diameter composite pipes, and achieve saving of precious and scarce metals, low cost, and high cladding ratio of multiple layers Effect

Inactive Publication Date: 2015-12-09
EAST CHINA UNIV OF SCI & TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned patented technologies are feasible in the preparation of small-diameter bimetallic composite pipes, but it is difficult to use them in the preparation of large-diameter composite pipes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The X52 pipeline steel plate with a thickness of 18mm and the alloy625 hot-rolled nickel alloy plate with a thickness of 3mm are used, and the length and width are 1610mm×12000mm. The main steps are as follows:

[0028] (1) The surface is assembled after derusting, cleaning and polishing, and alloy625 is placed on the X52 steel plate. Stack explosives, powder frames, detonators, etc. on the alloy625 board, and then detonate the detonator to achieve explosive recombination. After the semi-finished product is tested by ultrasonic flaw detection, it is placed in a heat treatment furnace for normalizing treatment, and the normalizing temperature is 920°C. After normalizing, the composite plate is leveled by the plate leveler, cut and trimmed according to the required size, and then passed the ultrasonic inspection before entering the welded pipe workshop.

[0029] (2) Forming by JCO process, the qualified explosive composite plate is formed into a tube blank through milli...

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Abstract

The invention relates to a production method of a corrosion-resistant bimetal composite pipe. The production method comprises the following steps: performing explosion composite operation on a corrosion-resistant alloy thin plate and a steel plate, performing heat treatment, leveling, cutting and trimming, and entering a pipe making workshop; forming by a JCO process, pre-welding, externally welding, internally welding, expanding diameter, performing a hydrostatic test, trimming end, performing flaw detection and marking to prepare corrosion-resistant bimetal composite pipe. The production method adopts an explosion composite process to prepare a bimetal composite plate, and obtains an excellent metallurgical bonding interface which is different from the mechanical interface bonding obtained through explosive expansion of the traditional embedded combined pipe, so the quality of the bimetal composite pipe is improved; production and manufacturing of a composite pipe with a large-caliber metallurgical bonding interface can be realized; the production method is particularly suitable for a submerged arc longitudinal welded pipe with the diameter being larger than 400 mm or 16 inches; high-strength metallurgical bonding of various dissimilar metals can be realized, and a brittle compound layer does not exist on the interface or is reduced to the minimal degree; the cladding coating ratio is high, so noble rare metal can be saved and the cost is low.

Description

【Technical field】 [0001] The invention relates to the technical field of bimetal composite straight seam pipes, in particular to a production method of corrosion-resistant bimetal composite pipes. 【Background technique】 [0002] With the acceleration of the global industrialization era, energy has become the key to the economic development of all countries. Due to the slow progress of alternative energy sources, the oil and gas resources that are easy to develop are becoming less and less, and it is now necessary to turn to high H content 2 S, CO 2 Development of oil and gas fields in strong corrosive medium environment. [0003] in high H 2 S, CO 2 Under such conditions, the material corrodes severely. The protection and control measures for corrosion in high-sulfur gas fields mainly include: (1) Use of corrosion inhibitors. The initial investment of this technology is small, but the process is complex and has a great impact on production; (2) use corrosion-resistant ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00
Inventor 刘京雷徐宏陈昌林阳屈笑雨黄克坚黎剑锋
Owner EAST CHINA UNIV OF SCI & TECH
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