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Specific ceramic lining composite pipe, pipe fitting and their producing method

A technology of special ceramics and composite pipes, applied in the field of composite pipes, can solve the problems of rough inner surface of pipes and inability to withstand negative pressure, and achieve the effect of good incompatibility

Inactive Publication Date: 2003-06-25
QIANGDUN ANTI CORROSION EQUIP ZIBO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inner lining has certain toughness and peel strength, but the inner surface of the pipe is rough and not resistant to negative pressure. It is only suitable for thin-walled steel pipes and thin steel coil welded pipes, and there are limitations in its promotion and use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Example 1 The inner wall of the cast steel pipe is pretreated with about 20% dilute sulfuric acid to remove the oxide layer, rinsed with water, and dried. The used diabase powder, quartz powder, graphite powder, ceramic powder and granite sand are all passed through a 60-mesh sieve to remove impurities. Take 10.0Kg of diabase powder, 2.0Kg of quartz powder, 2.0Kg of graphite powder, 2.0Kg of ceramic powder, 2.0Kg of granite sand, 2.0Kg of sodium fluorosilicate and 10.0Kg of sodium silicate solution, mix them evenly, and add them to the pretreated inside of a cast steel tube, closed at both ends. Keep the temperature at 50°C, centrifuge the cast steel pipe at a linear speed of 2.0m / s for 3h, and then dry it at about 60°C for 10h. Finally, the inner lining of the pipe is pickled with about 50% sulfuric acid solution, and the white solid precipitated after pickling is cleaned, and repeated 3 to 4 times until the white solid no longer precipitates in large quantities, and ...

Embodiment 2

[0008] Example 2 Example 1 was repeated, but the amount of sodium fluorosilicate was 1.0Kg.

Embodiment 3

[0009] Example 3 Example 1 was repeated, but the amount of sodium silicate solution was 2.5Kg, and centrifuged for 10 hours.

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Abstract

The composite pipe and pipe fitting are carbon steel or cast iron pipe with coated special ceramic lining concreted to the base material. The composite paint for the special ceramic lining consists of diabase powder, quartz powder, graphite, ceramic powder, granite sand, fluorosilicate, and alkali sodium silicate solution or potassium silicate solution. The production process of the composite pipe and pipe fitting includes pre-treatment of the pipe or pipe fitting, mixing and grouting slurry, centrifugally solidification and acid pickling. The present invention has anticorrosion grade over grade 10, can resist + / -0.1 MPa pressure and 0-300 deg.c temperature for long period without falling, has good incompatibility and is also suitable for curved pipe and reduced pipes.

Description

technical field [0001] The invention relates to the category of composite pipes, in particular to special ceramic-lined composite pipes and pipe fittings. Background technique [0002] Wear-resistant and corrosion-resistant pipes and fittings are widely used in industrial and urban drainage projects. At present, wear-resistant and corrosion-resistant pipes and pipe fittings are generally made of thickened steel, alloy, and inner anti-corrosion layer. Thickened steel pipes, alloy pipes, and pipe fittings have poor wear resistance and high cost. The use of lining anti-corrosion layer can save costs and improve wear-resistant and corrosion-resistant performance. Chinese patent 92112113.X discloses a wear-resistant and corrosion-resistant composite steel pipe and its manufacturing method. Any one of resin, water glass, cement, and furan resin is used as a cementing material, which is uniformly mixed according to the weight ratio of the materials contained in the inner lining, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B21/70C04B35/14F16L9/14F16L57/06F16L58/14
Inventor 王继江朱永刚
Owner QIANGDUN ANTI CORROSION EQUIP ZIBO
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