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Bimetal metallurgy composite straight seam welding pipe and manufacturing method thereof

A manufacturing method and bimetal technology, applied in the direction of manufacturing tools, metal processing equipment, edge parts of workpieces, etc., to achieve the effects of low use and maintenance costs, reduced manufacturing costs, and improved material utilization

Inactive Publication Date: 2018-09-25
CNOOC ENERGY TECH & SERVICES +2
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  • Abstract
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a bimetallic metallurgical composite straight seam welded pipe and its manufacturing method in order to solve the problem of existing bimetallic mechanical composite pipes for submarine pipelines in view of the requirements for oil and gas medium transportation in the development of deep-sea highly corrosive oil and gas fields. Insufficiency

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  • Bimetal metallurgy composite straight seam welding pipe and manufacturing method thereof
  • Bimetal metallurgy composite straight seam welding pipe and manufacturing method thereof
  • Bimetal metallurgy composite straight seam welding pipe and manufacturing method thereof

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Embodiment Construction

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0033] The cross section and longitudinal section of an embodiment of the present invention are as figure 1 and figure 2 shown. Depend on figure 1 It can be seen that the main structure of the bimetal composite pipe includes the base steel plate 1 , the inner cladding steel plate 2 and the longitudinal weld 3 . Wherein, the present invention provides the following steps to carry out longitudinal seam welding of bimetallic metallurgical composite pipes:

[0034] A method for manufacturing a bimetallic metallurgical composite longitudinal welded pipe, characterized in that it comprises the following steps:

[0035] Step 1, making the base steel plate 1 and the inner cladding steel plate 2 into a metallurgical composite plate by explosive welding;

[0036] Step 2, performing JCO molding on the composite plate to make a composite pipe;

[0037] Step 3, pro...

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Abstract

The invention discloses a bimetal metallurgy composite straight seam welding pipe and a manufacturing method thereof. The manufacturing method comprises: 1, preparing a metallurgical composite plate from a base layer steel plate and an inner cladding layer steel plate through an explosive welding method; 2, carrying out JCO molding on the composite plate to obtain a composite pipe; 3, carrying outvertical welding seam double Y-shaped composite groove processing on the composite pipe; 4, carrying out base layer centering pre-welding on the composite pipe groove by using a GMAW method, whereinthe welding material is CHW-60C; 5, welding the base layers on the inner side and the outer side of the groove of the composite pipe by using a SAW method, wherein the welding material is JW-9 / 995N; 6, welding the composite pipe groove transition layer by using GTAW, wherein the welding material is GMS-309MoL; and 7, welding the composite pipe groove inner cladding layer by using GTAW, wherein thewelding material is GMS-316L. According to the present invention, the problem of poor corrosion resistance of the existing submarine pipeline can be solved.

Description

technical field [0001] The invention belongs to the technical field of submarine oil and gas transmission pipelines, and in particular relates to a bimetallic metallurgical composite straight seam pipe and a manufacturing method thereof. Background technique [0002] In the development of deep-sea oil and gas fields, the underwater production system cannot pre-treat the produced oil and gas, which contains CO 2 and / or H 2 The highly corrosive oil and gas medium of S directly enters the submarine pipeline for transportation, while ordinary carbon steel pipes and low alloy steel pipes cannot meet the corrosion resistance requirements. In order to achieve long-term safe and stable operation of submarine oil and gas pipelines, high-performance pipes must be used. [0003] Due to the combination of high strength of carbon steel pipe and good corrosion resistance of stainless steel pipe, bimetallic composite pipe has become a high-performance special pipe widely recognized at hom...

Claims

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Application Information

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IPC IPC(8): B21C37/08B23K33/00
CPCB21C37/08B23K33/006
Inventor 陈小川王典灿曹静王志刚陈国炳候静相政乐陈培新武占文曾明勇陆娟夏万福薛小军
Owner CNOOC ENERGY TECH & SERVICES
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