POWER PLANT:COATING MATERIAL AND APPLICATION:

POWER PLANT

COATING MATERIAL AND APPLICATION:

The Contractor should use only coating materials that meet the requirement of this specification.
Unless otherwise accepted, all field coats of a system must be products of one manufacturer.

The preferred application method for the coating systems specified as airless or conventional spray equipment.

 Where spray equipment is required, the equipment, adjustments, and air pressure shall conform to the manufacturer's recommendation and shall be subject to approval by the Company/Engineer. 

Where the application by brush or roller is required due to special circumstances, the Contractor shall apply in writing, separately for the Company/Engineer's approval.

Regarding storage of paint and coating material as well as mixing and application, the Contractor shall follow the application instructions of the coating manufacturer.

 The colors of the different coats shall differ sufficiently for control purposes.
 The specified dry film thicknesses are minimum requirements. 

Therefore, sufficient wet film thickness per coat shall be applied to obtain the specified dry film thickness after drying or curing. The contractor has to follow the manufacturer's instructions and shall use wet film as well as dry film thickness gauges.

 Drying time between coats shall conform to the manufacturer's recommendations and shall be strictly followed.

QUALITY CONTROL AND INSPECTION:

Quality control and inspection by the Company/Engineer will not release the Contractor from his responsibility for the correct performance of the work.

The Contractor is responsible for taking liquid samples of the paint and coating materials during the construction period, and to retain these samples at the Jobsite for reference in the event of coating failure. Retained samples must be kept at least until the warranty period has expired.

For quality control and inspection after erection the following instruments and standards, 

which should be in a satisfactory working condition, shall be used for testing:
-           Swedish Standard SIS 05 5900
-           Kean Tator surface comparator
-           Material thermometer
-           Surface temperature gauge
-           Sling psychrometer
-           Non-destructive dry film thickness gauge
 Wet film thickness gauge  
-           Non-destructive pinhole detector (for tank linings and immersed surfaces

The Contractor is responsible for preparing a daily record of the painting work. 

The record shall indicate the locations and types of surfaces coated, the name of products applied, type of surface preparation, and dry film thickness per coat.

 The record should also include information about air temperature, steel temperature, and relative humidity.

 The contractor will supply the Engineer with a copy of each daily record on a weekly basis.

GUARANTEE:

The guarantee period for the complete painting and corrosion protection shall be five years after the Engineer's and Company's final inspection and acceptance.

For defining a possible failure of corrosion protection, the standards for the degree of rusting of anticorrosive paints should be used. If the degree of corrosion is above this standard, the Contractor is responsible for repairing and/or repainting those areas, which failed.

For guarantee control purposes test patches must be applied in the presence of the Contractor, Company/Engineer, and Coating Supplier. Test patches have to be identified and recorded.

 The Company/Engineer's approval for the number, size, and location of test patches will be required. 

Test patches shall be the basis for clarification of responsibilities between the Contractor and Coating Supplier in case of defect or failure.

COLOR SCHEDULE

After award of the contract, the color schedule for the plant will be compiled, in accordance with the specifications, by the A contractor for approval by the Company/Engineer.

Pipes and valves shall be identified by painted bands of the identification color for the fluid transported.

All identification colors shall be in accordance with German Standard RAL 840HR or equivalent.
Flow direction arrows shall be painted in the vicinity of branching-off connections, at the inlet branch connections downstream of each valve and at points, which will be indicated by the Engineer on-site.

All equipment and installations shall also be marked with identification numbers.