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Wednesday, June 14, 2023

Installation of Powercrete R65/F1

Powercrete R65 is a 100% solids epoxy coating used for corrosion and abrasion protection on clean, bare steel surfaces and adjacent coatings. Here is a summary of the installation process based on the provided data sheet:

  1. Scope: Powercrete R65 is applied over clean, bare steel and adjacent coatings. It comes in a pre-measured kit with two parts: Part A (base) and Part B (curing agent).

  2. Surface Preparation: Clean the surfaces using Acetone, MEK, or a suitable solvent to remove grease, oil, salts, and contaminants. Abrade the surfaces by abrasive blasting to achieve a near-white ISO Sa 2½ or white ISO Sa 3 surface profile. Sweep blast adjacent FBE coatings. Evaluate surface preparation using ASTM D 4417 Method C.

  3. Preparation of Adjacent Coating: Clean and abrade 50 mm (2 inches) on either side of the cutback (bare steel area) of the adjacent coating. Remove the gloss and obtain a minimum of 2 mils (50 μm) angular profile.

  4. Preheating (optional): Preheating the cutback area can accelerate curing and eliminate moisture. Preheat the cutback area to approximately 40°C (104°F) to eliminate condensation or up to a maximum of 60°C (140°F) to accelerate curing.

  5. Mixing: Warm parts A and B to a minimum of 20°C (68°F). Pour all of part B into part A and mix thoroughly using a slow mixing paddle for 2 to 3 minutes. Avoid introducing air into the mixture.

  6. Application: Ensure that the ambient temperature is above 10°C (50°F) and the dew point is above 3°C (5°F). Slowly pour the mixed epoxy onto the pipe. Use trowels, brush, or a roller to apply the required minimum thickness of the coating to the field joint, covering at least 50 mm (2 inches) of the adjacent coating. Tape may be applied to create a straight edge.

  7. Dry Film Thickness: The recommended dry film thickness for a single coat is 20 mils (500 μm).

  8. Curing Times: The curing rate and drying times vary based on pipe and ambient application temperature. Refer to the curing rate chart provided in the data sheet for Powercrete R65/F1 to determine when to perform a Shore D check.

  9. Storage: Store Powercrete epoxy products in a dry, well-ventilated area in their original sealed packaging. Avoid exposure to adverse environmental conditions.

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