UNIQUE POLYMER SYSTEMS specialises in providing durable protective solutions for critical infrastructure in demanding environments. This case study details the successful protection of large-diameter pipe bends at a nuclear power plant using UPS 405 EPC-AG EPOXY PROTECTIVE COATING - ABRASION GRADE and UPS 200 EG CERAMIC REPAIR PASTE.

Several large-diameter pipe bends within a nuclear power plant were identified as needing internal protection to prevent abrasion and wear. The integrity of the pipe bends, particularly at the welding seams, was crucial to the safe operation of the plant, requiring a reliable and long-lasting protective solution.

The challenge was to effectively prepare the internal surfaces of the pipe bends and apply a durable coating that would provide strong resistance to abrasion, thereby ensuring the longevity of the pipework in a highly demanding environment.

UNIQUE POLYMER SYSTEMS provided a comprehensive repair and protection solution using UPS 200 EG and UPS 405 EPC-AG. The application process involved the following steps:

Surface Preparation

- The internal surfaces of the pipe bends were prepared using mechanical abrasion with a handheld grinder, achieving a surface cleanliness level of ISO 8501/4 ST3 (SSPCSP3 ST3). This step was essential for ensuring proper adhesion of the repair and coating materials.

Repair with UPS 200 EG CERAMIC REPAIR PASTE

- The welding seams were repaired and rebuilt using UPS 200 EG. This material provided a durable and smooth surface, ready for the application of the protective coating.

Application of UPS405 EPC-AG EPOXY PROTECTIVE COATING – ABRASION GRADE

- After cleaning and degreasing the abraded surfaces with UPS 9918 MEK CLEANER, two coats of UPS 405 EPC-AG were applied to the entire internal surface of the pipe bends. Each coat was applied at a thickness of 400 microns, providing robust protection against abrasion and wear.

The application of UPS 200 EG and UPS 405 EPC-AG successfully protected the pipe bends from further abrasion and wear. The comprehensive repair and coating process ensured the long-term durability of the pipework, contributing to the safe and efficient operation of the nuclear power plant.

This case study highlights the effectiveness of UNIQUE POLYMER SYSTEMS' protective coatings and repair solutions in maintaining critical infrastructure in challenging environments. Our advanced materials and precise application process provided a reliable solution that extended the service life of the pipe bends.