Industry News

Principles for drawing pressure vessel drawings

1. Principles of View Selection (1) The number of views (including directional views, cross-sectional views, etc.) should be minimized on the premise of clearly representing objects. (2) Avoid using dashed lines to represent the contours and edges of objects. (3) Avoid unnecessary repetition. 2. Drawing principles For processing, assembly, and other needs, each piece of equipment, component, or part should be individually drawn with drawings. The principle of not requiring separate drawings is as follows: (1) National standards, professional standards, and other standard components and purchased parts. (2) For riveted and welded parts with simple structures and whose dimensions, graphics, […]

2023-06-06

Analysis of the Causes of Pressure Vessel Failure and Discussion on Preventive……

The industrialization construction has led to the rapid development of chemical enterprises in China. From a long-term development perspective, chemical enterprises face high safety risks, and once problems arise, they will have a relatively adverse social impact. The failure of production equipment caused by cracks in pressure vessels is a major safety hazard in major chemical enterprises. If not prevented as soon as possible, it will not only affect the normal operation of production equipment but also threaten the safety of residents, causing unnecessary economic losses. Exploring the causes of pressure failure and constructing preventive measures have become the focus […]

2023-05-04

Application of penetration testing in non-destructive testing of pressure vess……

To comprehensively improve the operational safety and stability of pressure vessels as well as pressure pipelines, the analysis is carried out around the technical classification of quality inspection, focusing on the specific types of penetration testing and the application principles, and the applicable scope and application effects of different surface nondestructive testing techniques are analyzed through specific cases. The choice of penetration testing for nondestructive testing of containers not only can quickly locate the quality defects of containers but also can lay a good foundation for the safe operation of the overall pressure equipment. With the gradual improvement of China’s […]

2023-04-01

Introduction to the stability design of titanium pressure vessels

There are stability problems in the regular design of titanium pressure vessels. We analyzes the main factors that cause the instability of pressure vessels due to internal and external pressure, and puts forward the measures that should be taken to control the instability of titanium pressure vessels. When the cylinder and head of titanium pressure vessel are subjected to compression load, circumferential instability or axial instability may occur. Circumferential instability can form several axisymmetric waveforms along the circumference of the cylinder or the circumference of the transition zone of the convex head; axial instability can appear along the axial corrugation […]

2023-03-05

Discussion on Quick Estimation Method of Non-standard Pressure Vessel Quotation

According to the non-standard pressure vessel manufacturer’s own manufacturing equipment and technical capabilities, combined with examples to explore the rapid estimation method of non-standard pressure vessel production prices, the method can be widely used in the production of non-standard pressure vessels to quickly and accurately determine the price of competitive bidding, as well as reasonable control of the production process costs. What is a non-standard pressure vessel? Non-standard pressure vessel mainly refers to the industrial production for a specific application area, with a specific process function of the variable, not a series, for the gas or liquid to complete the […]

2023-02-04

Safety management and operation of pressure vessels

With the accelerated pace of China’s industrialization, pressure vessels are increasingly used in many production fields, and have become important production equipment in petroleum, chemical, metallurgy and other fields. The pressure vessel has strict operation standards when it is used, otherwise it will lead to explosion and other accidents, causing huge economic and social losses. Analyze the safety management and operation strategy of pressure vessels in the production field to guide the safe and efficient production of industry and avoid pressure vessel accidents caused by improper operation and use. 0. Introduction In recent years, with the expansion of industrial production […]

2023-01-14

Crack problems in inspection of pressure pipes of boiler pressure vessels

In order to ensure that the boiler pressure vessel can be maintained in a normal operating condition, the inspection of the boiler pressure pipe should be done well and handled as an important work content. And in the actual work of the boiler pressure vessel, due to the internal environment and the impact of the external environment, there will be cracking problems, and this cracking problem is easy to be ignored by the staff, however, this cracking phenomenon will have a serious impact on the normal operation of the boiler pressure vessel, which hides a great hidden danger of operation. […]

2022-12-30

General knowledge of pressure vessel classification and safety accessories

There are many ways to classify pressure vessels, from the point of view of use, manufacture and supervision and inspection, there are the following: Classification by design pressure ① low pressure (L) 0.1MPa ≤ P < 1.6MPa； ② medium pressure (M) 1.6MPa ≤ P < 10MPa； ③ high pressure (H) 10MPa ≤ P < 100MPa； ④ ultra-high pressure (U) P ≥ 100MPa. Classification by the role of the process Reaction pressure vessel (R) Mainly used to complete the physical and chemical reaction of the medium pressure vessel. Such as reactor, reactor kettle, decomposition pot, vulcanization tank, decomposition tower, polymerization tower, […]

2022-12-03

Welding Technology of Stainless Steel Pressure Vessels

The pressure vessel with stainless steel and its welding characteristics The so-called stainless steel is added to a certain amount of chromium in the steel, so that the steel in a passivated state, with no rust characteristics. In order to achieve this purpose, its chromium content must be more than 12%. In order to progress in the passivation of steel, stainless steel is often required to add nickel, molybdenum and other elements that can make steel passivation. The general reference to stainless steel is actually a general term for stainless steel and acid-resistant steel. Stainless steel is not necessarily acid-resistant, […]

2022-11-12

Key points of material selection for stress corrosion of pressure vessels

Stress corrosion cracking Stress corrosion cracking (SCC) of a metal material occurs only in a specific corrosion environment. The following table shows the combination of pressure vessel steel and corrosion environment that are easy to cause stress corrosion cracking. It can be seen that almost every material is likely to have stress corrosion cracking. Table.1 Combination of Pressure Vessel Steel/Corrosion Environment Easily Causing Stress Corrosion Cracking Metallic materials Corrosive medium Carbon steel and low alloy steel NaOH solution; KOH solution; Nitrate solution; HCN solution; HzS aqueous solution; CO+CO2+H2O system; Gas liquid or coke oven gas liquid (CH4+H2+CO2+HCN+H2S+NH3+H2O); Liquid ammonia; K2CO3; […]

2022-10-07

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Principles for drawing pressure vessel drawings

Analysis of the Causes of Pressure Vessel Failure and Discussion on Preventive……

Application of penetration testing in non-destructive testing of pressure vess……

Introduction to the stability design of titanium pressure vessels

Discussion on Quick Estimation Method of Non-standard Pressure Vessel Quotation

Safety management and operation of pressure vessels

Crack problems in inspection of pressure pipes of boiler pressure vessels

General knowledge of pressure vessel classification and safety accessories

Welding Technology of Stainless Steel Pressure Vessels

Key points of material selection for stress corrosion of pressure vessels