A manufacturing process of austenitic stainless steel pipe fittings

Abstract

The invention discloses a manufacturing technology of an austenitic stainless steel pipe fitting. According to the technology, a pipe layer and a resistance reducing layer embedded in the inner wall of the pipe layer are included; the pipe layer is prepared in the technological steps of blanking, heating, welding, heat treatment and surface treatment; the resistance reducing layer is prepared in the following technological steps that an aqueous phase is prepared, an oil phase is prepared, the prepared oil phase is added to an oil phase reaction still, nitrogen is introduced to displace oxygen,the aqueous phase is added to the oil phase dropwise, nitrogen is introduced to displace oxygen again, then the conductivity is measured, when the conductivity is at the proper value, a polymerization reaction is initiated at a certain temperature, after the initiation temperature is stabilized, the temperature increase continues, and the temperature is kept for a certain period of time to realize complete reaction; after the reaction ends and a product is cooled, polymers are precipitated by the aid of acetone and ethanol alternately, and the polymers are placed into an oven to be dried to form polymer powder; the polymer powder is poured into an extruding machine, and the annular resistance reducing layer is obtained finally. The technology has the advantages and the effects as follows:the dissolution speed is high, uniform dispersion is realized, and the resistance reducing efficiency is high.

Description

technical field [0001] The invention relates to the technical field of pipelines, in particular to a manufacturing process of austenitic stainless steel pipe fittings. Background technique [0002] The main characteristics of austenitic stainless steel are that it has non-magnetic austenite structure at room temperature, low yield ratio of steel, good plasticity, good welding performance, easy smelting and casting and forging hot forming, and its composition is characterized by high Composition of chromium (≥17%), nickel (8%~25%) and other elements that improve corrosion resistance. Therefore, austenitic stainless steel pipe fittings made of austenitic stainless steel not only have good corrosion resistance but also have good mechanical properties and process properties, and thus have been widely used in various fields. [0003] Pipeline transportation ranks after road, railway, sea and air transportation, and is called the fifth largest transportation industry. As a bridg...

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Problems solved by technology

However, pipeline transportation also has serious disadvantages, that is, the elastic transport volume is much lower than other transportation methods.

With the rapid development of the petroleum industry, the pipeline transportation volume of crude oil and various refined oil products is increasing day by day, the transportation capacity of the original pipeline can no longer meet the requirements, and the new pipeline needs a lot of money and time, the original traditional transportation technology has become a constraint the bottleneck of its development

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