Cold drawing seamless pipe manufacturing technology for trailer gas cylinder
A manufacturing process and technology of seamless steel pipes, which are applied in the field of manufacturing process of cold-drawn seamless pipes for trailer gas cylinders, can solve the problems of low geometrical dimensional accuracy of steel pipes, no published patent documents have been found, and failure to meet user requirements, etc. Excellent performance, good surface quality, good comprehensive mechanical properties
Inactive Publication Date: 2014-11-26
天津润德中天钢管有限公司
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Problems solved by technology
[0003] The general specification of seamless steel pipes for trailer gas cylinders is Φ559X23.4. At present, the seamless steel pipes of this specification produced in China have poor surface quality, and the geometric dimension accuracy of the steel pipes is not high, which cannot meet the requirements of users. Therefore, we can only mainly rely on import
[0004] Through searching, no published patent documents identical with the application of the present invention have been found
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[0027] 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.
[0028] A manufacturing process of cold-drawn seamless steel pipes for trailer gas cylinders. The seamless steel pipes are made of 4130X, Φ508X25 hot-rolled raw material pipes, which are thermally expanded to Φ575X24.0 thermally expanded raw material pipes, and then pickled and lubricated. process, and finally cold-drawn to Φ559X23.4 cold-drawn finished tube, the specific process steps are:
[0029] 1. Thermal expansion process: thermal expansion of the hot-rolled raw material tube Φ508X25 to Φ575X24: the steps are:
[0030] ⑴Inspect the internal and external surface quality, outer diameter, wall thickness and wall thickness deviation of the same section of the hot-rolled raw material pipe of the specification Φ508X25. If there are s...
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Abstract
The invention relates to a cold drawing seamless pipe manufacturing technology for a trailer gas cylinder. Seamless steel pipes are made of 4130X and phi508X25 hot rolled raw material pipes which are expanded in a hot mode to form phi575X24.0 hot expanded raw material pipes, an acid pickling and lubricating technology is used for processing the hot expanded raw material pipes, finally, cold drawing is conducted on the hot expanded raw material pipes, and phi559X23.4 cold drawing finished pipes are formed. The cold drawing seamless pipe manufacturing technology for the trailer gas cylinder is the technology for manufacturing the 4130X cold drawing seamless steel pipes for the trailer gas cylinder, the hot expanding technology and the cold drawing technology are used in the good-quality hot rolled steel pipes, and the phi559X23.4 cold drawing finished pipes can be produced. According to the cold drawing seamless pipe manufacturing technology, the surface quality is good, the size precision is high, the comprehensive mechanical performance is good, and the cold drawing seamless pipe manufacturing technology is suitable for manufacturing trailer cylinders containing compressed natural gas, suitable for short-distance transportation of natural gas, and safe and reliable in performance.
Description
technical field [0001] The invention belongs to the technical field of new metallurgical materials, and relates to the manufacture of gas cylinder pipes for large-volume trailers, in particular to a manufacturing process for cold-drawn seamless pipes for trailer gas cylinders. Background technique [0002] The cold-drawn seamless steel pipe for large-volume trailer gas cylinders is specially used to manufacture trailer gas cylinders for short-distance transportation of compressed natural gas, that is, CNG gas cylinders. This kind of trailer gas cylinder is suitable for short-distance transportation between cities or to various gas supply stations in the city. This compressed natural gas transportation method is flexible, safe and reliable, and has been widely operated in major cities across the country. [0003] The general specification of seamless steel pipes for trailer gas cylinders is Φ559X23.4. At present, the seamless steel pipes of this specification produced in Chi...
Claims
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IPC IPC(8): B23P15/00
CPCB21C37/06
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
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