Inner lining anti-corrosion metallic composite pipeline with easy welded joint structure

A metal composite pipe, corrosion-resistant metal technology, applied in the direction of pipes/pipe joints/fittings, pipeline protection, pipeline anti-corrosion/rust protection, etc., can solve the problems of difficult on-site welding, insufficient corrosion resistance, preferential corrosion, etc. Complete anti-corrosion performance, good corrosion resistance, the effect of improving corrosion resistance

Inactive Publication Date: 2008-06-25
BEIJING SAFETECH PIPELINE
View PDF1 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing welding method of double-layer pipe joints may cause the corrosion-resistant metal at the joint to be discontinuous, making it the weakest link of the entire pipeline, and it will be preferentially corroded during service, causing explosions and leakage accidents
[0006] In order to overcome the above-mentioned shortcomings caused by welding joints of existing bimetallic composite pipes, the present invention focuses on optimizing welded joints on the basis of existing bimetallic composite pipes The connection structure, invented two new types of corrosion-resistant metal composite pipes lined, completely overcome the weakness of the existing bimetal composite pipe welded joints of insufficient corrosion resistance and on-site welding difficulties

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Inner lining anti-corrosion metallic composite pipeline with easy welded joint structure
  • Inner lining anti-corrosion metallic composite pipeline with easy welded joint structure
  • Inner lining anti-corrosion metallic composite pipeline with easy welded joint structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1 (structure one):

[0041](1) A seamless carbon steel pipe with a length of 2 meters and a specification of Φ325×7 mm is prepared. Use mechanical sandblasting equipment to sandblast the inside of the base tube, and then clean it with alcohol

[0042] (2) Use a stainless steel plate with a thickness of 1mm to make a stainless steel welded pipe with a length of 2 meters and an outer diameter of Φ315mm on a pipe making machine. It is welded by argon tungsten arc welding, and the outer height of the weld is ground and smoothed.

[0043] (3) Put the lining pipe into the carbon steel pipe, and connect the inner stainless steel pipe and the outer carbon steel pipe as a whole by hydrostatic extrusion. After the connection is completed, use a cutting tool to cut the two ends of the composite pipe flat and polish the bevel, that is, the preparation of the intermediate pipe body of the composite pipe is completed.

[0044] (4) Two seamless stainless steel pipes with ...

Embodiment 2

[0045] Embodiment 2 (structure two):

[0046] (1) Prepare a seamless carbon steel pipe with a length of 2 meters and a specification of Φ325×7mm, and prepare grooves at both ends of the pipe.

[0047] (2) Two seamless stainless steel pipes with a length of 0.2 meters and a specification of Φ325×7 mm were prepared, and their ends were beveled. Using a dissimilar metal welding method, respectively weld two sections of stainless steel pipes to both ends of the carbon steel pipe described in (1) to obtain a base pipe.

[0048] (3) Sandblasting equipment performs sandblasting treatment on the inside of the base tube, and after the treatment is completed, clean the inside of the tube with alcohol.

[0049] (4) Use a stainless steel plate with a thickness of 1mm to make a stainless steel welded pipe with a length of 2.4 meters and an outer diameter of Φ315mm on a pipe making machine. It is welded by argon tungsten arc welding, and the outer reinforcement of the weld is polished and ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a compound tube with internal lining made of corrosion resistant metal, which has end parts and a liner tube made of corrosion resistant metal and an outer body tube made of carbon steel or low alloy steel. The corrosion resistant metal applied in the end parts and the liner tube is used for resisting medium corrosion, while the carbon steel or the low alloy steel applied in the body tube is used for ensuring mechanical strength. When two compound tubes are welded together, a continuous tube made of corrosion resistant metal is formed in the compound tube, thereby ensuring that the whole tube has the corrosion resistance property of the corrosion resistant metal. When the mechanical strength at the joint of the two compound tubes is relatively low, the mechanical strength can be reinforced by (1) improving the wall thickness of the tube joint, (2) applying fiber reinforced composite, or (3) applying clamper filling technology. The liner tube of the invention can be made of corrosion resistant metals like stainless steel, nickel-based alloy, high content nichrome, titanium alloy, etc. The compound tube provided by the invention has good corrosion resistance, easy processing and low cost.

Description

field of invention [0001] The invention relates to a corrosion-resistant metal composite pipe lined with a novel joint structure. The inside of the composite pipe is a continuous corrosion-resistant metal structure, and the joint part can be reinforced by known technology. [0002] The composite pipe of the invention solves the corrosion-resistant problem of the weakest pipe joint of the corrosion-resistant composite pipe, ensures the formation of a continuous corrosion-resistant metal structure inside the pipe, and greatly improves the corrosion resistance of the pipe. The composite pipe of the invention avoids the leakage accident of the conveying medium caused by the corrosion failure of the pipe joint of the composite pipe. The composite pipe can replace expensive stainless steel and other corrosion-resistant metal pipes, and has good economical efficiency; it also avoids the use of carbon steel or low-alloy pipes that may cause serious corrosion, so it has good corrosion ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/02F16L13/02B32B1/08
CPCF16L58/181F16L9/18F16L13/02F16L13/0236
Inventor 路民旭刘国侯世颖王修云阮景红郑岩
Owner BEIJING SAFETECH PIPELINE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap