Manufacturing and pressure testing method for jacketed vessel with inner cylinder as inner groove

Abstract

The invention relates to a production technology of the jacketed vessel, in particular to a manufacturing and pressure testing method for a jacketed vessel with an inner cylinder as the inner groove.The problem that the quality of the container welding is difficult to improve due to the failure of an inner cylinder to be fully processed into an inner groove in the manufacturing process of an existing jacketed vessel is solved. The method comprises the following steps that (1) a hole with the diameter less than the diameter of a herringbone hole is pre-formed in the position, prepared to be formed with the herringbone hole, of the inner cylinder, group welding is conducted on the inner cylinder, an arc plate left by pre-hole-forming is welded to the pre-formed hole from the exterior, the opening hole of the arc plate is connected with a water injection pipe and a pressure gauge, and the pressure testing is conducted on the inner cylinder; (2) a jacket and the inner cylinder are mountedin a sleeved mode, the herringbone hole with the aperture greater than the pre-formed hole and used as the inner groove is continue to be processed in the position of the pre-formed hole, and the pressure testing after the jacket group welding is conducted; and (3) the equipment whole group welding is conducted. The manufacturing and pressure testing method is suitable for the pressure testing ofthe jacketed vessel with the inner cylinder as the inner groove, the welding seam groove can be processed according to the requirements, the pressure testing is completed, and the processing qualityis improved.

Description

technical field [0001] The invention relates to the production technology of a jacketed container, in particular to a manufacturing and pressure testing method of a jacketed container whose inner cylinder is an inner bevel. Background technique [0002] The jacketed vessel is a common type of vessel in the manufacture of pressure vessels. Generally, the jacketed vessel needs to undergo three pressure tests, that is, after the inner cylinder pair welding is completed, the jacket welding is completed, and the equipment is assembled and welded as a whole. However, due to the clamping Due to the special structure of the jacket container, the nozzles of the equipment should not be opened and assembled before the jacket welding is completed, but the pressure test of the inner cylinder must be carried out before the jacket welding, so as to repair the unqualified weld. If the equipment needs to use the inner bevel for the closing mouth of the inner cylinder, it cannot be welded, wh...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem that the inner cylinder cannot be completely processed into inner bevels in the production process of the jacketed vessel, the present invention provides a method for making and pressure testing the jacketed vessel with the inner cylinder as the inner bevel.

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