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Discussion on manufacturing process of pressure vessel

Pressure vessel is an important equipment in petrochemical industry. The workload of manufacturing pressure vessel is heavy, which has higher requirements for the manufacturing process. In the process of preparing industrial equipment, the pressure vessel should be manufactured according to the specification requirements, appropriate quality control measures should be taken to improve the production efficiency of the pressure vessel, and the possible quality defects should be handled in time to meet the safety requirements in the operation process of the pressure vessel. This paper discusses the manufacturing process of pressure vessel, analyzes the manufacturing process of pressure vessel and gives […]

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What is a pressure vessel

What is a pressure vessel? Pressure vessel is a kind of airtight equipment which contains gas or liquid and bears a certain pressure. In order to implement scientific management and safety supervision more effectively, pressure vessels are divided into three categories according to working pressure, medium harmfulness and their role in production in China’s “safety supervision regulation for pressure vessels”. Different regulations are made on the design, manufacturing process, inspection items, contents and methods of each type of pressure vessel. The safety and quality licensing system for imported goods has been implemented for pressure vessels, and the goods without import […]

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Four key points to improve the welding operation level of pressure vessel

For important structures such as boilers and pressure vessels, it is required that the joints be welded through safely. However, due to the limitation of structural size and shape, it is sometimes impossible to carry out double-sided welding. It is a difficult operation skill in manual arc welding. In vertical welding, due to the high temperature of the weld pool, under the action of gravity, the droplets formed by the melting of the electrode and the molten iron in the weld pool are easy to flow down to form weld bumps and undercut on both sides of the weld. When […]

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General requirements of pharmaceutical industry for sanitary container design

In pharmaceutical water system, sanitary pressure vessels are widely used, such as softened water tank, purified water tank and water for injection tank, which are atmospheric pressure vessels or pressure vessels with sanitary requirements. The purpose of design and construction of sanitary container is to protect the product to the maximum extent. The contact surface of the product will not pollute the product during the process and it is easy to clean, reduce the dead angle of breeding chemical or microbial pollution, and provide convenience for cleaning, maintenance and inspection. The general requirements of pharmaceutical industry for the design of […]

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The combination of pvelite’s nozzles will bring disaster

A long time ago, the company received a Japanese project, the equipment is designed according to ASME, because the company has only one point, for the sake of efficiency, I am responsible for the calculation of all equipment. After the calculation, the thickness of the equipment is calculated and the dimensions are marked to the designer. The equipments in the project are horizontal stainless steel tanks with low internal pressure and full vacuum negative pressure, which are basically 6 mm ~ 8 mm. By choosing the right reinforcing ring, the wall thickness and reinforcement can be controlled to the minimum. […]

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Key points of welding process for various stainless steel pressure vessels

Stainless steel for pressure vessel and its welding characteristics The so-called stainless steel means that after adding a certain amount of chromium into the steel, the steel is passivated and has the characteristics of no rust. In order to achieve this goal, the chromium content must be more than 12%. In order to improve the passivation of steel, nickel, molybdenum and other elements which can passivate steel are often added to stainless steel. Generally speaking, stainless steel is the general name of stainless steel and acid resistant steel. Stainless steel is not necessarily acid resistant, and acid resistant steel generally […]

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Cause analysis on Corrosion of 2507 duplex stainless steel potash evaporation ……

Taking the actual use of evaporation tank in two projects designed by a certain institute as the starting point, the causes of corrosion cracking of 2507 duplex stainless steel equipment were analyzed from the use environment and manufacturing process of 2507 duplex stainless steel equipment, and then how to avoid corrosion of duplex stainless steel equipment in the process of design, manufacture and use was discussed. The results show that the service environment and manufacturing process of duplex stainless steel evaporation tank have great influence on its corrosion resistance, especially when there are welding defects and stress concentration caused by […]

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What are the quality management measures for pressure vessel manufacturing mat……

Reasonable selection, proper storage and correct use of manufacturing materials are the premise and foundation to ensure the quality of pressure vessel products. In this paper, the material quality management of pressure vessel manufacturing is discussed in order to provide some reference for colleagues in the industry. As a kind of special pressure equipment, pressure vessel has been widely used in petrochemical, energy, scientific research and military industry. Its quality is directly related to the production safety of these industrial fields, so it must be paid full attention. In order to ensure the manufacturing quality of pressure vessels, the first […]

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Precautions for pressure vessel design

Pressure vessel: refers to the closed equipment that contains gas or liquid and carries a certain pressure. Its scope is defined as the fixed vessel and mobile vessel that the maximum working pressure is greater than or equal to 0.1MPa (gauge pressure), and the product of pressure and volume is greater than or equal to 2.5MPa · L, and the maximum working temperature is higher than or equal to the standard boiling point. Structure of pressure vessel: 1. Single layer type; 2. Multi layer type: high safety, but many production processes, low labor productivity; 3. Plate winding: it is not […]

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Introduction to the basic structure of pressure vessel

Pressure vessel is usually a welded structure composed of plates and shells. Among the pressure components, the shells corresponding to the cylindrical cylinder, spherical tank (or spherical head), elliptical head, dished head, spherical crown head, conical head and expansion joint are respectively cylindrical shell, spherical shell, ellipsoidal shell, spherical crown + ring shell, spherical crown, conical shell and annular plate + ring shell. The flat cover (or flat head), annular plate, flange, tube plate and other pressure components respectively correspond to the circular plate, annular plate (the difference between the outer radius and the inner radius is greater than 10 […]

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