When you hear the word “tang” what conjures up in your mind…an orange-flavored drink, a fish, a style of gasket material, or other definitions? The list goes on. We’ll let you guess which one we’re here to talk to you about. Is anyone thirsty for some Tang? If not, let’s start our discussion.
When we talk about our tanged (or perforated) core materials, do you have an understanding about what that is and why you may need it? Gasket material that is mechanically bonded together provides both strength and durability for the gasket in your application. There are also other reasons why you’d want to use a tanged core material – keep on reading to see why.
What is the Value to a Tanged Core?
1. Mechanical bond
With tanged core, there is a mechanical bond holding the material together, so as not to depend on a chemical bond that may degrade with heat exposure. Exhaust gasket composition benefits greatly from this mechanical bond to ensure the material retains its integrity both at and beyond the intended operating conditions.
2. Handling strength (durability)
The tang core provides strength for handling, often bonding high-temp materials that would be weak if unsupported, creating a robust material with the metal reinforcement. Handling in installation is a huge benefit.
3. Radial strength
The other strength issue is radial strength. This provides blowout resistance. The tang core provides a physical barrier and containment mechanism to hold the facing in place over the life of the joint. As compared to a glued laminate, the facing cannot extrude away from the core.
In addition to handling strength in assembly, the tang core also provides durability in the application. It serves to contain the seal’s facing in place to resist expansion and contraction due to thermal growth of the flanges.
5. Flange loading
Tanged core helps to provide load retention (torque retention of the fasteners). It does this by offering the metal structure providing “pushback” against the flange. The tangs create a “load stop” and structure, shouldering the load and preventing the facing from crushing under high load spots.
Give It a Shot
As you can see, it is hard to go wrong with a tanged core gasket material. Combined with the appropriate facings, this is a core that can meet the requirements of high-temperature and high-pressure applications. If you’ve never used tanged core materials before, you should consider how they would work in your application. A trusted gasket material supplier can help you decide if it is something you should explore.
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The Metal Tech Hi-Tex series features our specially designed starburst core tang technology. This robust metal core, available in carbon or stainless steel, provides optimum strength for the laminate in the most demanding applications.
The Metal Tech Corseal series features a rectangular perforation pattern. This pattern has nearly twice the perforations per square inch as the starburst pattern, providing more contact points to grip the facing.