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Manufacturing method of cold-drawing seamless steel tube for oxygen supplying bottles

A technology for seamless steel pipes and oxygen cylinders, applied in the field of metallurgy, can solve the problems of undiscovered manufacturing process and method of cold-drawn seamless steel pipes, poor surface quality of gas cylinders, poor safety and reliability, etc., and achieve light weight, simple structure, The effect of prolonged oxygen supply

Inactive Publication Date: 2010-11-17
天津润德中天钢管有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Oxygen supply cylinders are used for medical treatment, first aid, and health care. They are ideal oxygen supply equipment for hospitals, nursing homes, and home care. At present, billets are mostly stamped and then drawn to the specified size, and the process is relatively complicated; moreover, the gas produced by this process The surface quality of the bottle is poor, the unit weight is heavy, and the safety and reliability are poor
[0003] Through the search, no manufacturing process and method for cold-drawn seamless steel pipes for containing oxygen cylinders have been found

Method used

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  • Manufacturing method of cold-drawing seamless steel tube for oxygen supplying bottles
  • Manufacturing method of cold-drawing seamless steel tube for oxygen supplying bottles

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with specific examples, and the following examples are only descriptive, not limiting, and cannot limit the protection scope of the present invention with this.

[0021] The following takes the Φ178×4.8mm specification as an example to describe the process flow of cold drawn seamless steel pipe:

[0022] Incoming inspection of hot-rolled raw steel pipe → pickling → phosphating → saponification → cold drawing → straightening → inspection (inner and outer surface quality, wall thickness, outer diameter, curvature) → ultrasonic flaw detection → compactness test → sawing (cutting head , cut tail, cut unqualified parts)→sampling→performance inspection→storage.

[0023] A preparation method of a cold-drawn seamless steel pipe for an oxygen cylinder with a specification of Φ178×4.8mm:

[0024] (1) Inspection: The hot-rolled raw steel pipe is inspected at the factory. The raw steel pipe used is Φ182...

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Abstract

The invention relates to a manufacturing method of a cold-drawing seamless steel tube for oxygen supplying bottles, comprising the following steps: (1) inspection; (2) acid washing; (3) phosphate treatment; (4) soap treatment; (5) cold drawing; (6) straightening; (7) inspections on the quality, the wall thickness, the outer diameter and the flexibility of the inner surface and the outer surface of the seamless steel tube; (8) ultrasonic flaw detection; (9) denseness test; and (10) saw cutting. The oxygen supplying bottles manufactured by the method has the advantages of simple structure, small size, large capacity and long oxygen supplying time; in particular for the cold-drawing seamless steel tube for the oxygen supplying bottles, which adopts the material of 30CrMo and the specification of phi 178*4.8 mm is used as a representative variety, the product quality fully meets the technical requirements and is in the leading level in the same domestic industry and comprehensively meets the standard of the Seamless Steel Tubes for Air Bottles GB18248-2008 and some stricter quality requirements of users.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and relates to a seamless steel pipe, in particular to a method for preparing a cold-drawn seamless steel pipe for an oxygen cylinder. Background technique [0002] Oxygen supply cylinders are used for medical treatment, first aid, and health care. They are ideal oxygen supply equipment for hospitals, nursing homes, and home care. At present, billets are mostly stamped and then drawn to the specified size, and the process is relatively complicated; moreover, the gas produced by this process The surface quality of the bottle is poor, the unit weight is heavy, and the safety and reliability are poor. [0003] By searching, it is not yet found any manufacturing process and method about the cold-drawn seamless steel pipe used for containing oxygen gas cylinders. Contents of the invention [0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/06
Inventor 毕金宝王俊广张勇刘志才
Owner 天津润德中天钢管有限公司
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