How to Extend the Service Life of Vertical Storage Tanks

Choose suitable materials based on the properties of the stored medium (e.g., corrosiveness, temperature, pressure), such as carbon steel, stainless steel, corrosion-resistant alloys, or lined materials.

For highly corrosive media, use internal linings (e.g., fiberglass-reinforced plastic, rubber, polytetrafluoroethylene) or protective coatings.

Design in accordance with relevant standards (e.g., API 650, GB 50341) to ensure structural strength and stability.

Properly install stiffening rings, wind girders, and foundation supports to enhance resistance against wind and seismic loads.

Design an appropriate bottom plate slope and drainage system to prevent water accumulation and associated corrosion.

• External: Apply high-performance anti-corrosion coatings (e.g., epoxy, polyurethane), and use cathodic protection (sacrificial anodes or impressed current) when necessary.

• Internal: Select suitable internal coatings or linings according to the medium’s characteristics, and regularly inspect coating integrity.

• Bottom Plate: The tank bottom, especially where it contacts the foundation, is prone to corrosion. Apply dual-side corrosion protection and consider installing a cathodic protection system.

Strictly control welding quality to avoid defects such as porosity, cracks, and incomplete penetration. Conduct non-destructive testing (e.g., radiographic or ultrasonic testing) on welds.

Ensure dimensional accuracy to minimize stress concentration.

During installation, maintain a level and uniformly settled foundation to prevent structural damage caused by differential settlement.

Establish a regular inspection program (e.g., annual checks, comprehensive inspections) in compliance with regulations such as the Safety Technical Supervision Regulations for Stationary Pressure Vessels or other applicable standards.

Use ultrasonic thickness gauges to monitor wall and bottom plate thinning due to corrosion.

Inspect foundation settlement, floating roof seals, and auxiliary equipment (e.g., breather valves, safety valves) for proper operation.

Avoid operation beyond design limits for temperature, pressure, or liquid level.

Control corrosive components in the medium (e.g., sulfides, chlorides, moisture); perform dehydration or desulfurization if necessary.

Minimize frequent filling and emptying cycles to reduce fatigue damage.

Maintain a dry and well-ventilated environment around the tank; avoid prolonged water accumulation or high humidity.

In coastal or heavily industrialized areas, increase the corrosion protection level accordingly.

Install online monitoring systems (e.g., corrosion probes, strain/stress sensors, leak detection) for early warning of potential issues.

Utilize IoT technology for remote monitoring and data analysis to improve management efficiency.