1. Construction field: Fiberglass reinforced plastic square pipes can be used for structural support, beams, columns, staircase handrails, and other parts of buildings. They are lightweight, high-strength, corrosion-resistant, and can provide stable structural support.

2. Chemical industry: Fiberglass reinforced plastic square pipes can be used in chemical equipment, storage tanks, pipeline systems, etc., with excellent corrosion resistance and can transport various chemical media.

3. Sewage treatment: Fiberglass square pipes can be used in pipelines, tanks, sedimentation tanks and other equipment in sewage treatment systems, with characteristics such as corrosion resistance, wear resistance, and anti-corrosion.

4. Environmental protection equipment: Fiberglass square tubes can be used to produce various environmental protection equipment, such as smoke and gas treatment equipment, exhaust gas treatment equipment, sewage treatment equipment, etc.

5. Agricultural field: Fiberglass reinforced plastic square pipes can be used in agricultural facilities such as irrigation systems, channels, and ponds, and have the characteristics of corrosion resistance and good weather resistance.