Preparation method of bimetal glued composite tube

A composite pipe and bimetal technology, which is applied in the field of bimetallic composite pipe preparation, can solve the problems of small bending curvature, weak bonding force between liner and base pipe, high manufacturing cost, etc., and can withstand high temperature and ensure bonding Strength and the effect of improving the pass rate

Inactive Publication Date: 2020-09-29
ZHEJIANG JIULI HI TECH METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two types of products have their own advantages and disadvantages. The bonding force between the inner composite pipe base pipe and the liner (coating) is strong and the application range is wide, but the manufacturing cost is relatively high; the manufacturing cost of the lined composite pipe is relatively low. However, the bonding force between the liner and the base pipe is very weak, and the bending curvature is very small, so it is only suitable for pipelines laid in a straight line

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Manufacture a L450 / 316L glued composite pipe. The base pipe is made of L450 carbon steel pipe with an outer diameter of 219mm and a wall thickness of 12mm. The liner is made of a 316L stainless steel pipe with an outer diameter of 194mm and a wall thickness of 3mm. According to the standard According to CJ / T 192-2004, the working pressure of this type of composite pipe is not greater than 2MP. First of all, decontamination and derusting treatment is carried out on the outer surface of the liner and the inner surface of the base pipe. Specifically, physical decontamination and derusting methods such as sandblasting, grinding and polishing, and high-pressure air gun cleaning can be used. Chemical decontamination and derusting methods such as washing and degreasing, pickling and derusting. Then, epoxy resins are coated on the outer surface of the liner or the inner surface of the base pipe or the outer surface of the liner and the inner surface of the base pipe ...

Embodiment 2

[0034]Example 2: Manufacture a L245 / 316L glued composite pipe. The base pipe is made of L245 carbon steel pipe with an outer diameter of 114mm and a wall thickness of 12mm. The liner is made of a 316L stainless steel pipe with an outer diameter of 107mm and a wall thickness of 3mm. According to the standard According to CJ / T 192-2004, the working pressure of this type of composite pipe is not greater than 2MP. First of all, decontamination and derusting treatment is carried out on the outer surface of the liner and the inner surface of the base pipe. Specifically, physical decontamination and derusting methods such as sandblasting, grinding and polishing, and high-pressure air gun cleaning can be used. Chemical decontamination and derusting methods such as washing and degreasing, pickling and derusting. Then, a polyethylene adhesive is coated on the outer surface of the liner or the inner surface of the base pipe or the outer surface of the liner and the inner surface of the b...

Embodiment 3

[0038] Example 3: To manufacture a L450 / 316L glued composite pipe, the base pipe is made of L450 carbon steel pipe with an outer diameter of 219mm and a wall thickness of 12mm, and the liner is made of a 316L stainless steel pipe with an outer diameter of 219mm and a wall thickness of 3mm. According to the standard According to CJ / T 192-2004, the working pressure of this type of composite pipe is not greater than 2MP. Apply acrylic adhesive (liquid at room temperature) on the outer surface of the liner or the inner surface of the base pipe or on the outer surface of the liner and the inner surface of the base pipe by brush coating, and directly insert the stainless steel pipe into the carbon steel pipe sleeve after coating After that, pressure is applied to the inner wall of the liner so that the base pipe, adhesive, and liner fit closely together to form a composite pipe. Afterwards, the end of the pipe is cut and part of the liner is turned, and the 10-30mm deep adhesive bet...

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PUM

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Abstract

The invention discloses a preparation method of a bimetal glued composite tube. The preparation method comprises the following steps that S1, decontamination and rust removal treatment is conducted onthe outer surface of a liner tube and the inner surface of a base tube; S2, an adhesive is coated on the outer surface of the liner tube or the inner surface of the base tube or the outer surface ofthe liner tube and the inner surface of the base tube; S3, the liner tube is nested into the base tube and is subjected to pressurizing to enable the base tube, the adhesive and the liner tube to be tightly attached together to form the composite tube; S4, the end of the liner tube of the composite tube and the adhesive at the end of the liner tube are removed, and the adhesive with the depth of 10mm-30 mm between the remaining liner tube and the base tube is removed; S5, the end of the composite pipe is subjected to surfacing treatment, so that the liner tube is connected with the base tube;and S6, the composite pipe is heated. According to the prepared composite tube, the adhesive force strength of the adhesive is good, and the product preparation qualification rate is high.

Description

[0001] Preparation method of double metal glued composite pipe technical field [0002] The invention relates to the field of preparation of bimetallic composite pipes, in particular to a preparation method of bimetallic composite pipes. Background technique [0003] Bimetal composite pipe is composed of two metal pipes of different materials, including inner liner and outer base pipe. Among them, the liner mainly bears corrosion and is usually corrosion-resistant alloys such as stainless steel and nickel-based alloys; the base pipe is used to maintain the strength of the composite pipe and is usually carbon steel. A new type of pipe that is tightly bonded is formed between the pipe layers through various deformation and connection techniques. This type of product is generally used in the field of oil and gas gathering and transportation, and is suitable for laying in deserts, oceans and other environments. [0004] The common products are divided into two categories, whic...

Claims

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Application Information

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IPC IPC(8): B29C65/52B29C65/48B29C65/72B29L23/00
CPCB29C65/4805B29C65/52B29C65/72B29C66/0222B29C66/5221B29C66/742B29L2023/22
Inventor 刘蔚夏正文杨立建吴胜强苏诚王宝顺钱炯周建根邱锋陈琳马世龙
Owner ZHEJIANG JIULI HI TECH METALS
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