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Steel tube manufacturing method

A manufacturing method and technology of steel pipes, which are applied in the field of steel pipe manufacturing, can solve problems such as the weak load-bearing capacity of steel pipes and affect the service life of steel pipes, and achieve the effects of enhanced load-bearing capacity, extended service life, and reduced use costs

Inactive Publication Date: 2015-10-07
HUNAN SHENGLI XIANGGANG STEEL PIPE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The application range of steel pipe is very wide, but in the normal use process, there are problems such as the steel pipe’s load-bearing capacity is not strong, and the radial force will affect the service life of the steel pipe

Method used

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  • Steel tube manufacturing method

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Embodiment Construction

[0030] The manufacturing method of steel pipe of the present invention, its flow chart structural diagram is as figure 1 shown, including the following steps:

[0031] The new material Q345GJC-Z15 pipeline is used, which includes the following components by mass percentage: C≤0.20; Si≤0.55; Mn≤1.60; P≤0.025; S≤0.015; V 0.020-0.150; Nb 0.015-0.060; 0.010; Ti 0.010-0.030; Als≥0.015; Cr≤0.30; Cu≤0.30; Ni≤0.30; the balance is matrix Fe;

[0032] The raw material of the steel plate is inspected by the ultrasonic flaw detection method;

[0033] Arc extinguishing plate welding: arc extinguishing plates are welded at both ends of the steel plate to reduce quality problems in pipe welding;

[0034] Steel plate surface cleaning: remove floating rust on the steel plate surface;

[0035] Edge milling of the steel plate: Mill the steel plate with the corresponding knife to make the upper and lower grooves, the angle of the upper groove is 40°±0.5, the angle of the lower groove is 35°±0....

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Abstract

The invention discloses a steel tube manufacturing method. The steel tube manufacturing method comprises the steps of selection and inspection of raw materials, welding of arc striking and extinguishing plates, edge milling of a steel plate, prebending of the steel plate, forming of a JCO forming machine, internal and external welding, cut-off of the arc striking and extinguishing plates, weld flaw inspection, mechanical hole enlargement, rounding of the steel plate and other steps. According to the steel tube manufacturing method, novel Q345GJC-Z15 pipes are selected as the steel plate raw materials; the arc striking and extinguishing plates can ensure the welding quality; an obtained steel tube is firm and tight in welding, the influence of radial force on the service life of the steel tube can be reduced, and therefore the service life of the steel tube is prolonged; meanwhile, the bearing capacity of the steel tube is enhanced, and the use cost is lowered.

Description

technical field [0001] The invention belongs to the field of construction, and in particular relates to a method for manufacturing a steel pipe. Background technique [0002] The application range of steel pipe is very wide, but in the normal use process, there are problems such as the steel pipe's load-bearing capacity is not strong, and the radial force will affect the service life of the steel pipe. Therefore, it is of great significance to reduce the influence of radial force on the steel pipe and enhance the load-bearing capacity of the steel pipe. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the invention provides a steel pipe manufacturing method which enhances the load-bearing capacity of the steel pipe and reduces the use cost. [0004] In order to solve the problems of the technologies described above, the technical solution of the present invention is: [0005] A method for manufacturing steel pipes, comprising the steps of: ...

Claims

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Application Information

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IPC IPC(8): B23P15/00C22C38/14C22C38/16C22C38/28C22C38/38C22C38/50C22C38/58
CPCB23P15/00C22C38/002C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C22C38/16C22C38/28C22C38/38C22C38/50C22C38/58
Inventor 李延丰郑家红宫益涛刘春王潇朱旭庄绪强
Owner HUNAN SHENGLI XIANGGANG STEEL PIPE CO LTD
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