Fiberglass Tank Inspection | InterSpec LLC

FRP (Fiberglass Reinforced Plastic) Tank inspections are conducted in accordance with the Fiberglass Tank & Pipe Institute’s Recommended Practice FTPI-1. InterSpec’s certified inspectors are qualified to perform FRP inspections.

A Certified Tank and Vessel External Inspection is required every 5 years for tanks and vessels in Hazardous Substance service and every 10 years for tanks and vessels with a greater than 10,000 gallons capacity and in other service.

A Certified Tank and Vessel Integrity Inspection is required every 20 years for tanks and vessels in Hazardous Substance service as well as those having a greater than 10,000 gallons capacity and in other service.

A Certified Tank and Vessel External Inspection and a Certified Tank and Vessel Integrity Inspection is required whenever there is evidence of material stress, leaks occur, prior to change in service, and upon tank and vessel relocation.

During a Certified Tank and Vessel Integrity Inspection, one or more of the following tests are performed:

• Internal Inspection
• Pressure Test
• Ultrasonic Thickness Test
• Interstitial Vacuum Test if double-wall or equipped with a double-bottom

The entire surface is examined for:

• Crazing (Small Hairline Cracks)
• Delamination
• Over Torque on Flange Bolts
• Tank Supports
• Hold-Down Lugs
• Vents
• Barcol Hardness (for determining the cure and hardness of resins.)

Other tests used are acoustic emission and tracer gas testing.