A kind of bimetal composite pipe and its manufacturing process

A bimetallic composite pipe and process technology, applied in the direction of pipes, rigid pipes, pipes/pipe joints/pipe fittings, etc., can solve the problems of poor surfacing welding quality and difficult surfacing welding, etc., so as to improve the bonding performance, increase the welding area, The effect of reducing manufacturing costs

Active Publication Date: 2016-07-20
XIAN SUNWARD AEROSPACE MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The base pipe of the bimetal clad pipe after explosive cladding is flush with the end of the liner pipe, so it is difficult to carry out surfacing welding, and the quality of surfacing welding is not good

Method used

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  • A kind of bimetal composite pipe and its manufacturing process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] like figure 1 A bimetallic composite pipe shown includes a base pipe 1 and a liner pipe 2 sleeved inside the base pipe 1, and both ends of the base pipe 1 are provided with 30° grooves 5, and the base pipe 1 Annular grooves are provided on the inner walls of both ends of the base pipe 1 along the circumferential direction, and a surfacing layer 3 is arranged in the annular groove, and the inner liner 2 exceeds the surfacing layer 3 to form a blunt edge 6. The blunt edge 6 is provided with a sealing welding layer 4 for welding the base pipe 1 , the surfacing layer 3 and the lining pipe 2 together along the circumferential direction of the lining pipe 2 .

[0029] In this embodiment, the outer end surface of the welding overlay layer 3 and the end surface of the groove 5 are located on the same plane, and the maximum thickness of the overlay welding layer 3 along the vertical direction of the bimetal composite pipe is 2 mm.

[0030] In this embodiment, the length of the ...

Embodiment 2

[0042] This embodiment is the same as Embodiment 1, except that the angle of the groove 5 is 20°, the maximum thickness of the surfacing layer 3 along the vertical direction of the bimetallic composite pipe is 2.5mm, and the inner wall of the surfacing layer 3 is along the double The axial length of the metal composite pipe is 30 mm, the axial length of the blunt side 6 along the bimetal composite pipe is 5 mm, the wall thickness of the base pipe 1 is 4 mm, and the thickness of the inner liner pipe 2 is 3 mm.

Embodiment 3

[0044] This embodiment is the same as Embodiment 1, except that the angle of the groove 5 is 50°, the maximum thickness of the surfacing layer 3 along the vertical direction of the bimetallic composite pipe is 1.5mm, and the inner wall of the surfacing layer 3 is along the double The axial length of the metal composite pipe is 8 mm, the axial length of the blunt side 6 along the bimetal composite pipe is 2 mm, the wall thickness of the base pipe 1 is 5 mm, and the thickness of the inner liner pipe 2 is 0.5 mm.

[0045] The bimetallic composite pipe of the present invention can ensure the effective compounding of the base pipe and the end of the lining pipe by setting an annular groove on the inner wall of the bevel of the base pipe, and setting a surfacing layer in the annular groove, and effectively avoid sealing after compounding. Carburizing at the top of the groove during welding can reduce the wall thickness of the composite pipe lining to 0.5mm, effectively reducing the m...

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Abstract

The invention discloses a double-metal composite tube which comprises a base tube and a lining tube arranged on the inner side of the base tube in a sleeved mode. The two ends of the base tube are provided with 20-degree to 50-degree beveled edges respectively. The inner walls at the two ends of the base tube are provided with annular grooves respectively in the peripheral direction of the base tube. Surfacing layers are arranged in the annular grooves. The lining tube exceeds the surfacing layers to form a truncated edge. The truncated edge is provided with a sealing and welding layer for welding the base tube, the surfacing layers and the lining tube together in the peripheral direction of the lining tube. Furthermore, the invention further discloses a manufacturing process of the double-metal composite tube. According to the double-metal composite tube and the manufacturing process of the double-metal composite tube, the inner walls at the positions of the beveled edges of the base tube are provided with the annular grooves, and the surfacing layers are arranged in the annular grooves, so that effective recombination of the base tube and the lining tube can be guaranteed, carburization at the beveled edge top ends when sealing and welding are conducted after recombination is conducted can be effectively avoided, the thickness of the lining wall of the composite tube can be reduced to 0.5 mm, and thus manufacturing cost of the composite tube can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of metal tubular products, and in particular relates to a bimetal composite pipe and a manufacturing process thereof. Background technique [0002] Metal pipelines have been widely used in oil and gas transportation, and carbon steel pipes are the most widely used, but their corrosion resistance is poor. Among the corrosion-resistant alloy pipes, bimetallic composite pipes have been widely used in oil and gas pipelines because of their superior mechanical properties, good corrosion resistance, and strong weldability. [0003] At present, the bimetallic composite pipe is mainly prepared by the explosive composite method, that is, the base pipe and the liner pipe are assembled, and then the cluster explosive is placed on the axis of the liner pipe, and the explosive force produced by the explosive instantly causes the water pressure in the tank to increase instantaneously. The instantaneously increased water ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L9/02B21C37/06
CPCB21C37/06F16L9/02
Inventor 吴泽李奇张燕飞王斌刘振锋傅海
Owner XIAN SUNWARD AEROSPACE MATERIAL CO LTD
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