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Davo ED Single-layer Pipeline Anti-corrosion Coating

DAVO ED powder coating is a thermosetting fusion-bonded epoxy powder coating specifically designed for single-layer corrosion protection of pipelines. This epoxy powder primer exhibits excellent adhesion and resistance to cathodic disbondment. Coated pipelines can be used over a wide temperature range (-30°C to 100°C) and are suitable for both underground and underwater pipeline installations. During the production process, in addition to conducting systematic testing according to standard technical specifications for each batch, our company also employs KBR disks for infrared scanning inspections and simultaneously performs DSC scanning tests to ensure product quality.

Keywords:

Davao Powder

Category:

Functional protective industry products

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  • Product Details

  • Product Description

    DAVO ED-type powder coating is a thermosetting fusion-bonded epoxy powder coating specifically designed for single-layer corrosion protection of pipelines. The epoxy powder primer exhibits excellent adhesion and resistance to cathodic disbondment. Coated pipelines can be used over a wide temperature range (-30°C to 100°C) and are suitable for both underground and underwater pipeline installations. During the production process, in addition to conducting systematic testing according to standard technical specifications for each batch, our company also employs KBR disks for infrared scanning inspections and simultaneously performs DSC scanning analyses to ensure product quality.

     

    Storage conditions

    In an environment with a temperature below 30℃ and relative humidity below 60%, the shelf life is 6 months. If the shelf life exceeds 6 months, the product must undergo re-inspection before it can be used.

     

    Powder curing requirements

    1. Remove surface oil, rust, other loose deposits, moisture, and the like.

    2. Perform sandblasting or shot blasting to reach Sa2.5 grade, with an anchor pattern depth of 50–90 μm. Remove dust from the surface until it reaches a near-white finish. Pay attention to evenly adding both new and recycled abrasive materials to maintain a stable mix ratio.

    3. Clean the pipe surface.

    4. Preheat the workpiece, generally controlling the temperature between 180 and 220℃.

    5. Apply EB powder coating to the pipe surface using electrostatic spraying, with a coating thickness of 60–150 μm.

    6. Apply the hot-melt adhesive onto the epoxy powder coating at a temperature close to its melting point, with a minimum thickness of 200 μm.

    7. Extrude the polyethylene surface layer at its melting point temperature (approximately 240℃), wrap it around the intermediate adhesive layer, and use a pressure roller to compact the three layers thoroughly, preventing air bubbles from forming between the layers.

    8. Coating cooling.

    9. Repair the leak.

     

    Curing Instructions

    1. EB powder coating is applied to preheated workpieces and then cured according to spraying requirements to achieve optimal performance.

    2. The intermediate adhesive layer must be applied before the powder adhesive melts, so that the two layers can fuse into one.

    3. The intermediate adhesive layer and the outer PE layer, which have higher temperatures, can ensure proper powder curing.

    4. Curing temperature: 180℃ for 5 min, 205℃ for 3 min

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