Jacket steel-lined plastic corrosion-prevention high-voltage-resistance pipe fitting and manufacturing method

Abstract

The invention discloses a jacket steel-lined plastic corrosion-prevention high-voltage-resistance pipe fitting and a manufacturing method, and belongs to the technical field of corrosion-prevention high-voltage-resistance pipe fittings. The jacket steel-lined plastic corrosion-prevention high-voltage-resistance pipe fitting comprises a jacket steel body, a lined thermoplastic body and a reinforcedplastic pipe casing. The rough surface of the inner wall of the jacket steel body which is subjected to sand (steel shot) blasting processing and provided with many uneven concave pits is provided with the lined thermoplastic body, wherein the lined thermoplastic body is obtained after main lined thermoplastic bodies which are 4-10 mm in thickness are subjected to thermal compression and thermalcontraction. In the whole pipe fitting structural design, the jacket steel body achieves the effect of bearing circumferential stress, the lined thermoplastic body achieves the effect of bearing corrosion prevention, the reinforced plastic pipe casing and a composite pipe are fused to achieve the effect of bearing axial stress, the capability of the composite pipe fitting of resisting compoundingof acid, alkali and salt is greatly improved, and meanwhile, the service life of a pipeline system is also greatly prolonged.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion and high-pressure pipe fittings, and in particular relates to a steel-lined anti-corrosion and high-pressure pipe fitting with an outer jacket and a production method thereof. Background technique [0002] The thermoplastic continuous fiber prepreg tape reinforced thermoplastic piping system has the advantages of high pressure resistance, high heat resistance, corrosion resistance, long life, low cost, recyclability, green environmental protection, etc., and can be widely used in oilfield technical pipeline networks, long-distance oil and gas pipeline networks, Industrial and chemical pipe networks, municipal heating and water supply pipe networks, etc., have the advantages and prospects of replacing existing metal and non-metal and their composite pipe networks. [0003] In the medium and low pressure pipeline system, the pipe fittings prepared by the prior art include pure plastic pipe fi...

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Problems solved by technology

[0005] However, in many oilfield gathering and transportation pipeline networks, the delivery pressure of the pipeline system is 2.5MPa-32.0MPa; in the long-distance oil and gas pipeline network, the delivery pressure of the pipeline system is 6.4MPa; The pressure of the pipe network for solid and solid is 6.0MPa~12.0MPa. In the long-distance water diversion pipe network, the alpine reservoir water diversion pipe network, and the river diversion pipe network, the working pressure of the large diameter pipe network is as high as 4.0MPa~6.4MPa. Medium and low pressure pure plastic electrofusion pipe fittings, steel skeleton, orifice steel strip skeleton, steel wire mesh skeleton thermoplastic composite electrofusion pipe fittings cannot meet the use requirements

[0006] Steel pipe fittings can meet the pressure requirements of the 2.5MPa ~ 32.0MPa pipeline system, but because the steel pipe fittings are easy to corrode, the service life is extremely short, especially in the atmosphere of acid, alkali and saline medium

[0007] In view of the large number of 2.5MPa ~ 100MPa high-pressure pipeline systems, the existing pure plastic electrofusion pipe fittings, steel skeleton, orifice steel strip skeleton, steel wire mesh skeleton thermoplastic composite pipe fittings cannot meet the requirements for use greater than 4.0MPa, the market urgently needs to meet The 2.5MPa~100MPa high-pressure corrosion-resistant thermoplastic composite pipe fittings are matched with high-pressure continuous fiber-reinforced thermoplastic composite pipes to meet the needs of corrosion-resistant high-pressure pipeline systems

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