Blasting is the operation of forcibly propelling a stream of abrasive material against a surface under high pressure to smooth a rough surface, roughen a smooth surface, shape a surface, or remove surface contaminants. A pressurized fluid, typically compressed air, or a centrifugal wheel is used to propel the blasting material.

There are several variants of the process, using various media; some are highly abrasive, whereas others are milder. The most abrasive are shot blasting (with metal shot) and sandblasting (with sand). Moderately abrasive variants include glass bead blasting (with glass beads) and media blasting with ground-up plastic stock or walnut shells and corncobs. A mild version is soda-blasting (with baking soda). In addition, there are alternatives that are barely abrasive or nonabrasive, such as ice blasting and dry-ice blasting.

High quality painting on piping and equipment as well as structures, is essential to avoid corrosion. It helps ensure long life of a constructed plant and low maintenance costs. Painting involves not only total surface cover but also markings of various types such as line numbers, fluid codes, flow arrows, equipment numbers etc.

Painting specification for the project is given by Client in FEED.

Painting Workflow

• Ensure all tests are performed on piping system before starting painting work.
• Clean painting surface to remove oils, grease, dirt.
• Ensure proper room temperature and humidity levels.
• Use hand tools, machine tools, shot blasters etc to clean surface as per relevant standards and project requirements.
• Apply primer within 4 hours of surface preparation.
• Apply paint coats after previous coats have dried up, as per instructions of paint manufacturer.