Let’s discuss how effective the wavy gasket pads used in petrochemical plants are!

The sealing performance is better at pressures below 6.0 MPa

Wave-patterned gaskets are suitable for sealing medium and low-pressure equipment. They are more expensive than graphite wound gaskets and inner/outer ring gaskets, but the material can be selected based on the temperature and corrosivity of the medium, resulting in good performance.

It’s better than wound gaskets, and can be reused by replacing the graphite on its surface

It works pretty well; it seems to be a patented product of a sealing components factory in Guangzhou.

The factory requires that it not be used in areas with low pressure and low temperature, which is somewhat wasteful! We ourselves also prefer to use it less!

This can be reused actually; we used to throw away those we replaced. I think its performance is acceptable. However, if there is a slight leak while in use, or if the surface of the wave-shaped gasket gets damaged in any way, it becomes difficult to hold everything tightly together, and the only solution then is to replace it

The wavy tooth gasket, also known as the wavy tooth composite gasket, is a gasket consisting of a metal frame processed using a special technique – its upper and lower surfaces feature concentric grooves in the form of wavy teeth that are offset from each other – along with expansion graphite material of appropriate thickness applied on both sides. It has the dual functions of metal contact wire sealing and multiple layers of expanded graphite ring sealing. It is particularly well-suited to conditions of pressure and temperature fluctuations; it has strong resistance to stress relaxation and will not ‘fall apart’. The gasket has an appropriate thickness, which facilitates positioning and prevents it from being compressed or crushed. Suitable for most corrosive fluid applications with temperatures ranging from -200°C to +650°C (up to over 800°C for special frame materials) and pressures of 0 to 25 Mpa, the corrugated metal gasket, also known as a corrugated composite gasket, is designed for situations where high resilience from the gasket is required. It boasts excellent heat conductivity, making it suitable for high-temperature, high-pressure, and highly corrosive environments. Its dimensions can be customized, and various metal materials can be used. The largest-sized gaskets, namely corrugated composite gaskets, belong to the category of gaskets that provide linear contact sealing; they are mechanically supported by the corrugations, and their resilience is determined by the design features used, the thickness of the metal, the spacing between the corrugations, and their height. Graphite layers are usually applied to both sides of these gaskets, which enables them to be used on sealing surfaces that are not perfectly flat. Wave-shaped gasket with excellent sealing performance ； Good resilience ； Long sealing life ； Safe and reliable, easy to install and use, with strong versatility. This post was last edited by zhenghemqx on 2009-4-27 12:46.]

Wavy tooth gaskets are more expensive than metal wound gaskets but can be reused. They are advantageous for large manholes, as they are less likely to get damaged; metal gaskets tend to disintegrate, and sometimes, when the graphite loses its oiliness, the steel strips can easily break under heat and pressure.

We use wave-patterned gaskets for our heat exchanger gaskets; we’ve been using them for almost 10 years now – they’re from Guangzhou Jiji, and they perform well. However, we still use spiral wound gaskets for pipe flanges.

It belongs to the category of wave-shaped gaskets; metal wave-shaped gaskets, also known as wave-tooth composite gaskets, are designed for applications where high requirements are placed on the gasket’s resilience. They offer excellent heat conductivity, making them suitable for use in high-temperature, high-pressure environments as well as in corrosive conditions. Their dimensions can be customized, and various metal materials can be used for their construction. The largest size gasket (6000 mm) is a corrugated composite gasket; such gaskets belong to the category of linear-contact sealing gaskets, with mechanical support provided by the corrugations. Their resilience is determined by the design format, metal thickness, corrugation spacing, and corrugation height. Graphite layers are generally applied to both sides of the gasket, allowing it to be used on uneven sealing surfaces. Maximum processing size for metal wave washer: ~6000mm ； Special specifications or various non-standard products can be developed according to customer requirements. Key technical parameters of metal corrugated gaskets: Compression rate of 20% minimum; rebound rate of 40% minimum; maximum pressure of 300 bar (depending on temperature); pH value ranging from 0 to 14. For wave-shaped composite gaskets, the gasket coefficient is as follows: Gb psi (MPa): 557 (3.8); a: 0.325. Gs psi (MPa): 2.21 (0.02).

Material properties of metal corrugated gaskets (wave-shaped composite gaskets): Metal material; sealing layer material; temperature range and pressure in bars: 304 – graphite, from -196 to 600 bar; 300 – 304L, expanded PTFE, from -268 to 315 bar; 280 – 316, silver, from -200 to 750 bar; 250 – 316L.

Features of toothed composite gaskets: Toothed composite gaskets are a type of metal soft gasket that provides better sealing performance than plain metal gaskets. They are made by using precision lathes to create concentric, 90-degree angled serrated grooves on both sides of the stainless steel metal gasket. Depending on the medium involved, materials such as flexible graphite, PTFE, asbestos-free sheets, or other soft metals can be used and applied to these grooves. By leveraging the sealing properties of the soft covering layers along with the strength and elasticity of the metal, these gaskets also provide a labyrinth seal effect. As a result, the same level of sealing can be achieved with less compression force required. Toothed composite gaskets can also be used directly without a covering seal layer, achieving a good sealing effect; however, in high-pressure applications, they may cause damage to the surface of the flange. Toothed composite gaskets are primarily used for sealing pressure vessels and pipeline flanges under medium to high pressures and high temperatures. Main technical parameters of toothed composite gaskets: Material properties of toothed composite gaskets: Metal materials: 304, 304L, 316, 316L; Sealant materials: Graphite, PTFE. Temperature range: Graphite – 196 to 600; PTFE – 268 to 310. Pressure in bars: Graphite – 300; PTFE – 210. :lol