Research on the Technical Adaptability of Glass Fiber Self Adhesive Tape in Industrial Pipeline Coating

Industrial pipeline wrapping needs to meet the triple requirements of thermal insulation, corrosion prevention, and fire prevention. Glass fiber self-adhesive tape is an ideal choice due to its composite properties. In the field of petrochemicals, a three-layer composite structure is used in the DN800 carbon steel pipeline cladding project of a refinery's atmospheric and vacuum distillation unit

Anti corrosion layer: The primer adopts epoxy zinc rich coating (dry film thickness of 80 μ m), the middle layer is laid with 0.18mm thick glass fiber self-adhesive tape, and the topcoat is acrylic polyurethane (dry film thickness of 120 μ m).

Insulation layer: Wrap 50mm thick aluminum silicate fiber felt around the anti-corrosion layer, with a density controlled at 128kg/m 3.

Protective layer: covered with 1.0mm thick aluminum alloy sheet, and sealed with self-adhesive tape at the joints.

Performance testing shows that the surface temperature of the structure drops below 45 ℃ at a medium temperature of 120 ℃, meeting the requirements of the "GB 50264-2013 Code for Design of Industrial Equipment and Pipeline Insulation Engineering"; After 1000 hours of salt spray test, the anti-corrosion layer showed no bubbling or peeling phenomenon; In the fire test, according to the GB 8624-2012 standard combustion test, the temperature rise of the backfire surface is less than 140 ℃, reaching the A-level non combustible standard.

Technical and economic analysis shows that compared to the traditional glass fiber cloth+asphalt coating process, the self-adhesive tape solution shortens the construction period by 60%, reduces maintenance costs by 75%, and reduces carbon emissions by 42% throughout the entire lifecycle. At present, the industry is developing graphene modified self-adhesive tapes to further optimize thermal insulation performance by increasing the thermal conductivity to 0.035W/(m · K).