What does a Type 3 Certificate of Registration enable?

A Type 3 Certificate of Registration specifically permits the holder to perform hydrostatic testing on DOT (Department of Transportation) cylinders. This certification is essential for maintaining compliance with federal regulations governing the safety and reliability of pressurized containers. DOT cylinders require specific testing methods to ensure they are safe for continued use, and only those with the appropriate type of certification are authorized to perform these tests.

The distinction of this certification is important because it focuses on the legal and safety standards that must be met when dealing with specific cylinder types regulated by the DOT. Other options imply a broader scope of operations that may not align with the regulations tied to this specific certification. For example, while recharging low pressure non-DOT cylinders or performing maintenance on various fire extinguisher types may be important tasks, they do not fall under the purview of a Type 3 Certificate of Registration, which is specifically tailored for hydrostatic testing of DOT cylinders only.