Products and Manufacturing Process

Dong-A Flexible Metal Tubes Co., Ltd. manufactures corrugated stainless steel tubes in annular type & helical type for various usage (industrial & residential water plumbing system, gas plumbing system & gas appliance connector, heat exchanger and circulator for solar thermal system, sprinkler flexible joints for fire-fighting). Production is completed in one line process, using the automatic corrugation forming machine of international patent.

  • The Manufacturing Process

  • The Inside of the Factory

Dong-A’s manufacturing process ensures the world best quality with our technical expertise, newest facilities, and inspection devices conforming to the international standards.

Dong-A CSST has 3 key functions of absorbing shrinkage & expansion, absorbing location change, and absorbing vibration in plumbing system, which allows various usage.