Surface Preparation Method - High-pressure Water Jetting

Surface preparation – High-pressure Water Jetting: High-pressure Water Jetting : It is also known as hydro-jetting which includes the process of cleaning and unblocking the drains comes under the surface preparation.

As the name implies, this technique involves the use of high-pressure water in order to clean remove the toughest of blockages Water jetting methods are similar to wet abrasive blasting cleaning with Flash rust evidenced in the prepared surface. The main advantage of water jetting is to remove all contamination that includes chemical products (i.e. Salts). The best effective method for salt removal from the surface.

Advantages It will restore existing surface profile (it will not damage the existing profile in maintenance project) It will remove entire contamination Very effective process Disadvantages It will not create a surface profile Equipment cost is very high High operator skill is mandatory Highly dangerous due to high pressure involved Type of Water jetting Low-pressure water cleaning (LPWC) – below 5000 psi High-pressure water cleaning (HPWC) – 5000 – 10000 psi High-pressure water jetting (HPWJ) – 10000 – 30000 psi Ultra-high pressure water jetting (UHPWJ) – more than 30000 psi Standard reference: SSPC VIS 5 – SSPC WJ 1, SSPC WJ 2, SSPC WJ 3, SSPC WJ 4