Manufacturing Process of Cold-drawn Seamless Tubes for Oxygen Cylinders
A manufacturing process and seamless pipe technology, which is applied in the field of cold-drawn seamless pipe manufacturing process for oxygen cylinders, can solve problems such as undiscovered patent documents, and achieve the effects of excellent mechanical properties, broad market prospects, and large diameter-to-wall ratio
Active Publication Date: 2017-03-22
天津润德中天钢管有限公司
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[0003] By searching, no published patent documents identical with the present invention have been found
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[0035] 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.
[0036] A manufacturing process of cold-drawn seamless pipes for oxygen cylinders. The material of the cold-drawn seamless pipes is 30CrMo, hot-rolled seamless pipes with specifications of 140×4.5. Pull out to the finished product specification of 108×2.8, and then pass the steel pipe finishing and steel pipe inspection to get the qualified finished steel pipe.
[0037] Concrete process steps are:
[0038] 1. Incoming inspection of raw material pipes
[0039] (1) Visually inspect the quality of the inner and outer surface of the steel pipe: cracks, folds, scars, and delamination are not allowed on the surface. These defects must be removed, and the wall thickness of the removed place is not less than the minimum wall thickness of th...
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Abstract
The invention relates to a technology for manufacturing a cold-drawing seamless tube for an oxygen bottle. According to the technology for manufacturing the cold-drawing seamless tube for the oxygen bottle, a hot-rolling seamless tube made of 30 CrMo and with the specification of 140*4.5 is selected, factory inspection, acid pickling lubricating treatment and two times of cold drawing are carried out on the hot-rolling seamless tube, and therefore a finished product with the specification of 108*2.8 is obtained; and finishing and inspection are carried out on the steel tube, and the finished product steel tube is obtained. The high-quality hot-rolling seamless tube (the specification of phi 114*4.5, and the material of 30 CrMo) is adopted, and the cold-drawing finished product tube with the specification of phi 108*2.8 is obtained through two times of cold drawing. The tube has the advantages of being high in surface quality, high in geometric dimensioning precision, excellent in mechanical property and the like; the performance index of the tube comprehensively meets the requirement of GB18248-2008 the seamless steel tube for the oxygen bottle and the requirement of the user-signed technical protocol RDZT-001-2010 the cold-drawing seamless tube for a gas bottle / inner container; the quality is reliable, the good user reputation is achieved, and the technology has the wide market prospect.
Description
technical field [0001] The invention belongs to the technical field of new metallurgical materials, and relates to the manufacture of oxygen cylinders for diving with a large diameter-to-wall ratio, in particular to a manufacturing process for cold-drawn seamless pipes for oxygen cylinders. Background technique [0002] With the rapid development of science and technology, there are more and more diving operations, and the demand for oxygen cylinders for diving is gradually increasing. At present, most of the oxygen cylinders for diving use substitutes, and there is no special oxygen cylinder for diving. Oxygen cylinders for diving are special supplies and need to withstand high pressure, so the surface quality of diving oxygen cylinders is required to be high, the dimensional accuracy is good, and the comprehensive performance is excellent. But the replacement oxygen cylinder still adopts the existing medical oxygen cylinder, and there is a big safety risk. [0003] By se...
Claims
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IPC IPC(8): B21C37/06B21C1/22
CPCB21C1/22B21C37/06
Inventor 毕金宝王俊广张勇刘志才毕金立
Owner 天津润德中天钢管有限公司