Chemical Engineering - Process Equipment and Plant Design - Discussion

Rimmed steel is not typically used for pressure vessel construction due to its lower ductility and toughness compared to other types of steel. Pressure vessels require materials with high strength, toughness, and resistance to brittle fracture, and rimmed steel does not meet these requirements.

Instead, pressure vessels are typically constructed from low-alloy steels or alloy steels that have been heat treated to achieve the desired properties. These materials are specifically designed and tested to withstand the high pressures and stresses that occur in pressure vessel applications.

Mild steel is not typically used for the construction of pressure vessels, as it does not have the necessary strength, toughness, and resistance to brittle fracture required for such applications. Mild steel has a low carbon content and is relatively soft, making it more susceptible to deformation and failure under high pressure and stress.

Pressure vessels are typically constructed from high-strength low-alloy (HSLA) steels or alloy steels, which have been specifically designed and tested to withstand the high pressures and stresses that occur in pressure vessel applications. These materials have higher carbon content, along with other alloying elements, which provide greater strength and toughness.

Killed steel can be used for the construction of pressure vessels, and it is actually a common choice for such applications. Killed steel is a type of steel that has been deoxidized with an agent such as silicon or aluminium, which reduces the amount of dissolved oxygen and other impurities in the steel. This results in a more uniform structure and better mechanical properties, including improved ductility and toughness.

Pressure vessels require materials with high strength, toughness, and resistance to brittle fracture, and killed steel is often used due to its superior mechanical properties. Additionally, killed steel is readily available and cost-effective, making it an attractive option for pressure vessel construction.

Semi-killed steel can be used for the construction of pressure vessels, although it is not as commonly used as killed steel or fully killed steel. Semi-killed steel is a type of steel that has been partially deoxidized, resulting in a lower amount of dissolved oxygen and other impurities compared to rimmed steel, but more than killed steel.

The mechanical properties of semi-killed steel are generally better than those of rimmed steel but may not be as good as those of killed steel. Therefore, the suitability of semi-killed steel for pressure vessel construction depends on the specific application, operating conditions, and design requirements.

So, the correct answer is killed steel.

Mild steel is used for pressure vessel construction.

It is so informative. Very helpful. Thanks all.

Please, explain the different types of alloys and materials used in the chemical industry for different applications.

Due to the non-uniformity of alloying elements it is not recommended for hot-working applications.