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Flat steel products are common materials used in the manufacture of French heat-resistant pressure vessels. Selecting an adequate steel grade with suitable properties is an essential factor to both ensure safety in the use of the vessel for the specified service and fabrication of the vessel. In the following article, the common requirements and characteristics of flat steel products for pressure vessels are discussed, as well as the steel grade and grades best suited for French heat-resistant pressure vessels.
Flat steels for pressure vessels need to satisfy certain requirements, in terms of mechanical and physical properties, to ensure safe and efficient use in pressure vessel applications. Generally, flat steel products used for pressure vessels should be tensile, ductile and with appropriate optional properties like corrosion resistance capability and weldability. Depending on the specific application, additional properties may also be required by the manufacturer, which include creep resistance, fatigue resistance, fracture toughness and heat resistance. Furthermore, adequate thickness, length and width of the steel should also be ensured to ensure compatibility of the vessel design.
The most important mechanical properties of flat steel products used in pressure vessels, would be the yield strength, tensile strength and elongation, which are normally tested and specified in accordance to the applicable standards. Generally, the minimum yield strength of steels used in pressure vessels is 220MPa and the minimum tensile strength should meet about 400Mpa, depending on the application. The elongation value is also generally specified and may depend on the application, with a minimum value of 21-22% for normal strength applications and 15-16% for higher strength steels.
When considering the flat steel for French heat-resistant pressure vessel applications, there are a variety of steels available which have the necessary properties to meet the requirements. Some of the steel grades which are commonly used in pressure vessel applications include A516 Grade 70 and A515 Grade 70. A516 Grade 70 is a low carbon alloy steel which is most commonly used in pressure vessel applications due to its excellent tensile and yield strength, ductility and weldability characteristics. A515 Grade 70 is a higher strength grade with improved formability, making it suitable for applications with higher strength requirements. Other steel grades which may be used in pressure vessel manufacture include A537, A662 and A387 grades, depending on the specific application requirements.
Finally, it is important that the correct steel grade is selected for use in the manufacture of French heat-resistant pressure vessels, in order to meet safety requirements as well as provide good fabrication properties. The appropriate steel grade should be selected to ensure that it has the necessary mechanical and physical properties, such as high tensile and yield strength as well as ductility and weldability. The thickness, length and width of the steel should be selected according to the design requirements. A516 Grade 70 and A515 Grade 70 are the most commonly used steels for pressure vessel applications, however other grades may be suitable for specific applications.
