The exposed surface of the carbon steel parts and components of the plate heat exchanger should be rust-proof; the flange sealing surface should be coated with oil (grease) for protection
The exposed surface of carbon steel parts and components of the plate heat exchanger should be protected against rust, and the frankincase surface should be protected by oil (grease).
The exposed surface of carbon steel parts and components of plate heat exchanger shall be provided with anti rust measures; the sealing surface of flange shall be coated with oil (grease) for protection<br>