Common Mistakes When Selecting Industrial Gaskets and How to Avoid Them

Industrial gaskets are critical components in equipment subjected to pressure, temperature, or aggressive fluids. Choosing the right gasket is not just a technical decision; it's also a safety measure. An error in selection can lead to leaks, plant shutdowns, equipment damage, and operational hazards.

Next, we review the most common mistakes when selecting gaskets and how to avoid them to ensure a reliable and long-lasting seal.

1. Not considering the actual operating temperature

• Choosing a gasket without verifying its thermal range causes premature failure.
• NBR rubber cannot withstand temperatures above 100°C, while expanded graphite can withstand up to 550°C.
• Peak temperatures should also be taken into account if they are frequent.

2. Lack of knowledge of chemical compatibility

• Not all gaskets can withstand the same fluids.
• The materials must be compatible with acids, bases, oils or steam as appropriate.
• A common mistake is using rubber gaskets in the presence of aggressive fuels or solvents.

3. Ignore system pressure

• Low-pressure gaskets do not work in pressurized lines.
• Spiral wound gaskets, camprofile gaskets or reinforced graphite gaskets are more suitable for medium and high pressure.
• Using a soft gasket in a 20 bar system can cause instant leaks.

4. Not taking into account the type of flange

• The gaskets must be adjusted to the flange geometry.
• A poor fit between the gasket and the flange face causes leaks.
• It is important to check if the gasket is for raised face, flat face, or RTJ type.

5. Using the wrong thickness

• Greater thickness does not always mean a better seal.
• Excessive thickness can deform or interfere with tightening torque.
• Insufficient thickness may not adequately seal irregularities.

6. Failure to validate environment conditions

• Factors such as humidity, vibration, weather or the presence of chemicals affect performance.
• In outdoor or humid areas, materials resistant to aging, such as EPDM or graphite, are recommended.

7. Failure to verify the actual assembly conditions

• Incorrect assembly negates the quality of the material.
• Tightening torque, surface cleaning, and alignment are key to effective sealing.
• The manufacturer's recommendations should be followed.

8. Choosing based on cost instead of performance

• A cheap gasket can end up being expensive if a leak or an unscheduled shutdown occurs.
• It is preferable to use a high-quality gasket that guarantees durability and safety.
• The gaskets should be chosen based on the process, not just on availability or price.

How to avoid these mistakes

• Carefully analyze the process, fluid, temperature, and pressure.
• Consult with specialized technical providers.
• Check technical specifications and material compatibility.
• Ensure proper assembly using the appropriate tools.
• Perform preventive maintenance and periodic replacement.

At Suimtec, we offer a wide range of gaskets for demanding industrial conditions, including materials such as expanded graphite, PTFE, composite fibers, spiral wound gaskets, and engineering rubbers. We also provide technical consulting to help you select the safest and most efficient option for your operation.