When securing a low pressure tank fitting, what grade bolt should be used?

When securing a low pressure tank fitting, the appropriate choice is a Grade 8 bolt. Grade 8 bolts are made from high-strength steel and are ideal for applications where high tensile strength and resistance to wear and deformation are necessary. They are commonly used in demanding applications, including heavy equipment and structural assemblies, due to their ability to withstand higher loads and stresses compared to lower-grade bolts.

Using a Grade 8 bolt ensures that the fastening remains secure under the conditions typically encountered in low pressure tank fittings. These fittings must maintain integrity and safety, given they often deal with materials that could have significant consequences if not properly contained. The strength and durability of Grade 8 bolts make them the preferred choice to prevent failure and protect the overall system.

Furthermore, while lower-grade bolts like Grade 5 or others might be adequate for less demanding applications, they do not offer the same mechanical properties that are necessary for retaining structural integrity in a high-stress environment, such as those found in tank fittings. Therefore, using a Grade 8 bolt provides a reliable solution that aligns with safety and engineering standards in the context of low pressure applications.