Unlock instant, AI-driven research and patent intelligence for your innovation.

Casting process of variable-diameter pipe of reformer tube

A technology of casting technology and variable-diameter tubes, which is applied in the field of reformer tube variable-diameter tube casting technology, can solve the problems that the precision cannot be effectively guaranteed, many casting processes, and high scrap rate, and achieve low scrap rate, low cost, and high resistance. Good high temperature performance

Inactive Publication Date: 2017-03-29
QINGDAO NPA IND
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current casting process of the reformer tube reducing tube not only has many casting processes, which affects the production capacity, but also the accuracy cannot be effectively guaranteed, and the scrap rate is high.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0013] The reformer tube reducing tube casting process provided in this embodiment is as follows:

[0014] (1) Casting of pipe sections: molten steel is smelted in an intermediate frequency furnace, centrifugal casting and coating process package are used for centrifugal pouring and paint spraying of pipe section blanks, and after shot blasting, mechanical processing of inner holes and welding grooves at both ends;

[0015] (2) Quality inspection during the manufacturing process of pipe sections: a. During the smelting in the intermediate frequency furnace, the chemical composition of each molten steel is analyzed; b. The outer surface inspection after shot blasting treatment; c. End cutting and experimental sampling; d. .Carry out various tests such as mechanical performance test, minimum dense layer thickness inspection of the pipe section, eddy current flaw detection of the pipe section and ultrasonic inspection of the pipe section, to ensure that the quality of the conversi...

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 discloses a casting process method of a variable-diameter pipe of a reformer tube. A centrifugal casting process is adopted, and detections are performed by detecting chemical constituents, mechanical properties and the macro-microstructure, and carrying out other relevant tests, so that the quality of a variable-diameter pipe of a reformer tube can be effectively guaranteed. The method has advantages of less investment, low cost and low scrap rate to avoid the waste of raw materials; castings processed through centrifugal casting have good performance of high temperature resistance and long life.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to a casting process of a reformer tube variable diameter tube. Background technique [0002] The pipe system of the reformer is the core of the reformer, including the upper gas collecting pipe, the upper tail pipe, the reforming pipe, the lower gas collecting branch pipe (lower tail pipe), and the lower gas collecting main pipe. Some places in the reformer need to use variable diameter tubes, and due to the high temperature of the tube wall, various quality problems often occur during use. The current casting process of the reformer tube reducing tube not only has many casting processes, which affects the production capacity, but also the accuracy cannot be effectively guaranteed, and the scrap rate is high. Contents of the invention [0003] In order to overcome the above-mentioned defects in the prior art, the object of the present invention is to provide a castin...

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): B21C37/16B22D13/02
CPCB21C37/16B22D13/02
Inventor 王兴雷
Owner QINGDAO NPA IND