Acceptance Specifications for Anti-corrosion Treatment Using Glass Flakes in Underground Pipelines

Epoxy glass flake coating for corrosion protection is a common method used to protect underground pipelines, effectively preventing chemical corrosion, moisture erosion, and damage caused by soil bacteria. Based on the information you provided, the design specifications state that there should be 3 coats, with a total dry film thickness of 800 micrometers (μm) or more. The specifications for testing the corrosion resistance of epoxy glass flake coatings typically cover the following aspects: 1. Visual inspection: The coating surface should be smooth and even, without any defects such as foam, cracks, or uncoated areas. 2. Dry film thickness testing: Non-destructive measuring instruments (such as electromagnetic or ultrasonic thickness gauges) are typically used to measure and record the thickness of the coating, to ensure it meets the design specifications. 3. Adhesion test: The adhesion properties of the coating may be examined to ensure a strong bond between the coating and the substrate. 4. Spark testing: The spark test is a common method used to detect pores, bubbles, or cracks in coatings. In accordance with the requirements regarding electrical spark testing in SY/T 0447-96 \"Inspection Procedures for Anti-corrosion Coatings of Metal Pipelines in the Petroleum and Natural Gas Industry\" or other relevant industry standards and specifications, live high-voltage testing is carried out to ensure the absence of perforations or other defects. 5. Physical and chemical property testing: This may include evaluating the coating’s chemical resistance, water resistance, temperature resistance, etc. In practice, the following standards or specifications may also be referred to for acceptance testing: – GB/T 16754-2008 \"Technical Specifications for Anti-corrosion Coatings on Steel Pipes\" – SY/T 0315-2005 \"Anti-corrosion Polyethylene (PE) Coatings on Steel Pipes in the Oil and Gas Industry\" – Relevant industry standards or acceptance criteria established by the company itself. In practical application, it is also necessary to take into account specific project requirements and the actual conditions on site. It is recommended to consult a professional anti-corrosion company or relevant experts, and to follow the latest or applicable standards and specifications. Whether an electric spark test is necessary should ultimately be determined based on the engineering requirements and regulatory specifications. If more specific standards and regulations need to be consulted, it is recommended to contact the design party or the relevant industry authorities for the latest information. .

We carry out the work in accordance with the technical specifications HG-T2640-2004 for glass flake application, and ultimately, spark testing is definitely required