Which of the following is an approved method for connecting corrugated metal pipe?

• A. Welded
• B. Bell
• C. Band and Clamp
• D. Slip Joint

Answer: (C)

Band and clamp is the approved way to join corrugated metal pipe because it uses a mechanical external band that wraps around the joint and tightens a gasket to create a secure, watertight seal around the pipe ends. This method preserves the circular shape, accommodates minor misalignment and settlement, and can be installed in the field without heat or special welding equipment—reducing distortion and corrosion risks that welding or other methods might introduce. The other options either require fabrication steps not suited to CMP, can distort or leak due to heat or mismatch, or aren’t designed for the corrugated profile, making them less reliable as standard connections.