Corrugated Gaskets Manufacturer in China

What Are Corrugated Gaskets?

In the demanding world of industrial sealing, where extreme pressures, temperatures, and corrosive media are commonplace, finding a reliable gasket solution is paramount. Corrugated gaskets stand out as a superior choice for numerous critical applications. Unlike flat gaskets, these are characterized by a distinct pattern of concentric ridges and grooves—the corrugations—machined or formed into a metal core, typically plated or covered with a soft sealing material like graphite or PTFE. This ingenious design combines the resilience and sealing capability of the soft facing with the structural strength and recovery of the metal core. At Kaxite Seals, we engineer these components to deliver unmatched performance, ensuring leak-tight integrity in your most challenging flange connections.

Key Features and Benefits of Our Corrugated Gaskets

The design of a corrugated gasket is a direct response to the limitations of other gasket types. Here’s what sets them apart:

• Excellent Sealing at Low Bolt Load: The corrugated metal core acts as a spring, providing inherent resilience. This allows the gasket to maintain a seal even when bolt load relaxes due to system vibrations or thermal cycling, a common failure point for other gaskets.
• High Pressure and Temperature Resistance: The metal core, available in various grades like 304/316 stainless steel or exotic alloys, provides mechanical strength to withstand high internal pressures and temperatures exceeding 1000°F (538°C) in some configurations.
• Superior Creep Resistance: The metal structure resists the cold flow or creep that soft gaskets experience under constant load and heat, preventing the seal from thinning and failing over time.
• Chemical Compatibility: By selecting appropriate facing materials (e.g., expanded graphite for wide chemical resistance, PTFE for aggressive acids) and metal core plating (like tin or nickel), Kaxite Seals can tailor gaskets for specific media.
• Reduced Flange Stress Required: Their efficiency means you often don't need extremely high bolt torque to achieve a seal, which can protect flange surfaces from damage and simplify assembly.

Kaxite Seals Corrugated Gasket: Detailed Product Specifications

Our corrugated gaskets are manufactured to exacting standards, ensuring consistency and reliability. Below are the standard parameters and options we offer.

Standard Construction & Materials

Technical Performance Data

*Upper temperature limit depends on metal core selection and atmosphere. Consult Kaxite Seals for specific oxidizing environments.

Common Applications for Corrugated Gaskets

Due to their robust performance profile, Kaxite Seals corrugated gaskets are specified across a wide range of industries:

• Oil & Gas: Heat exchangers, pipeline flanges, valve bonnets, and compressor stations handling hydrocarbons, steam, and process fluids.
• Chemical & Petrochemical: Reactors, distillation columns, and pump flanges exposed to corrosive acids, alkalis, and solvents.
• Power Generation: Boiler manways, steam turbine casings, and high-temperature/pressure feedwater systems.
• Refining: Critical service in crude units, reformers, and hydrotreaters where thermal cycling is frequent.
• Marine & Aerospace: Engine and propulsion system flanges requiring reliable seals under vibration.

Frequently Asked Questions (FAQ) About Corrugated Gaskets

Q: How do corrugated gaskets compare to spiral wound gaskets?
A: Both are excellent for high-pressure services, but key differences exist. Spiral wound gaskets use a wound metal strip and filler, offering great flexibility and compression. Corrugated gaskets have a solid, corrugated metal core, which gives them higher resilience (spring-back) and better performance in applications with thermal cycling or vibration where bolt load may fluctuate. Corrugated gaskets also typically require lower seating stress.

Q: Can corrugated gaskets be used on raised face (RF) and flat face (FF) flanges?
A: Yes, Kaxite Seals corrugated gaskets are suitable for both. For Raised Face flanges, the gasket seats within the inner area of the raised portion. For Flat Face flanges, the gasket must cover the entire face to prevent blowout. It is crucial to specify the flange type when ordering to ensure correct gasket outer diameter (OD) and inner diameter (ID).

Q: What is the recommended bolt torque for installing a corrugated gasket?
A: There is no universal torque value. The correct bolt load depends on the gasket material, size, pressure class of the flange, and the bolt material. Over-torquing can crush the gasket and damage flanges, while under-torquing can cause leakage. Always follow the assembly guidelines provided by Kaxite Seals, which are based on ASME PCC-1 guidelines, or consult the specific equipment manufacturer's instructions. Using a calibrated torque wrench and a proper cross-pattern tightening sequence is essential.

Q: How do I select the right facing material: Graphite or PTFE?
A: The choice hinges on chemical compatibility and temperature. Expanded Graphite is the default for most high-temperature applications (steam, hot oil, many chemicals) up to 1500°F in inert atmospheres. It has excellent thermal conductivity. Choose PTFE when dealing with extremely aggressive acids, caustics, or solvents at lower temperatures (up to 500°F), or when ultra-purity is required, as PTFE is highly inert and non-contaminating.

Q: Can a corrugated gasket be reused after disassembly?
A: It is generally not recommended to reuse any gasket, including corrugated types. Once compressed, the facing material and the metal core's "spring" have taken a set. Reusing it may not provide the same resilience and sealing force, increasing the risk of a leak. For critical service and safety, Kaxite Seals always advises installing a new gasket during any flange reassembly.

Q: Does Kaxite Seals offer custom-shaped corrugated gaskets (non-round)?
A: Absolutely. While standard ASME B16.20 and B16.21 round gaskets are our most common products, we have extensive capabilities in manufacturing custom shapes. We can produce oval, square, rectangular, or irregularly shaped corrugated gaskets to fit heat exchanger channels, manways, and other specialized equipment. Provide us with a drawing or sample, and our engineering team will handle the rest.

Q: What information do I need to provide to order the correct corrugated gasket?
A: To ensure you receive the optimal gasket for your application, please provide the following: 1) Flange Standards (e.g., ASME B16.5, B16.47), 2) Nominal Pipe Size and Pressure Class (e.g., 12" Class 600), 3) Flange Face Type (RF, FF, RTJ), 4) Service Conditions (Fluid Media, Temperature, Pressure), and 5) Any special requirements (e.g., NACE MR0175 for sour service). Our technical team at Kaxite Seals is always ready to assist with selection.