How to strengthen the seal of manhole cover of waste oil tank

Select high-quality, chemical-resistant gaskets suitable for waste oil environments:

Ensure the gasket's thickness and compression rating match the tank's operational pressure. VITON gaskets are ideal for high-temperature applications, while EPDM works well in moderate conditions.

The manhole flange and cover must have smooth, flat surfaces for even gasket compression. Use precision machining or grinding to eliminate:

Employ laser alignment tools during installation to ensure perfect flush contact. Reinforce the manhole structure with welded supports or braces to prevent deformation.

Replace standard bolts with corrosion-resistant alternatives:

Use torque wrenches for uniform tightening pressure. For high-risk applications, consider spring-loaded bolts or tensioning systems that adjust for thermal changes.

Install redundant sealing solutions:

Inflatable gaskets can be pressurized when needed, while liquid sealants (silicone/polyurethane) form flexible barriers. For above-ground tanks, apply UV-resistant protection.

Establish routine checks for:

Use ultrasonic detectors or soap-bubble tests for small leaks. Train operators to report unusual odors or wet spots. Clean debris regularly and maintain detailed maintenance records.