One of the most important decisions that can be made to mitigate corrosion is selecting the right materials of construction. This includes the selection of the tube material, tube sheet material, and shell/support plate materials. The process flow make up will determine what shell and internal support materials will be selected. The cooling water source, fresh or salt water, will determine the materials selection of the waterboxes. A combination of both of these factors helps to determine the materials selection of the tubes and tube sheets. Failure to specify the correct materials of construction in a project can have long lasting implications on the system performance and reliability.
Common Fresh Water Tube Materials
- Admiralty Brass
- 300 Grade Stainless Steel
- Duplex Stainless Steel
Common Salt or Brackish Water Tube Materials
Warning: Carbon steel tubes should never be used in a vacuum service. The steel tubes will rust quickly impeding condensing and hurting the system performance. Problems with performance and tube failures are often seen when using steel tubes in a vacuum service.