Please share your thoughts on the use of winding gaskets!

Metal wound gaskets come in four types: A, B, C, and D. Type A does not have inner or outer rings. Type B has only an inner ring. Type C has only an outer ring. Type D has both inner and outer rings; it is determined by the sealing type of the flange. When the working pressure varies, the width and thickness of the metal strips in the gasket also change. The materials of the inner and outer rings, as well as the metal and non-metal strips, also vary depending on the working medium. If you want, I can send you an email. 670263577@qq. com

Wrapped gaskets are formed by continuously winding V-shaped or W-shaped metal strips together with non-metallic strips; they can withstand high temperatures and pressures, as well as operate in conditions of extremely low temperatures or vacuum. By changing the material combination of the gaskets, the chemical corrosion of the gaskets caused by various media can be addressed. Gaskets with excellent resilience can automatically adjust to the pressure, thermal cycling, and vibrations in pipeline systems ； Gaskets with an outer ring (inner ring) can ensure automatic alignment on the flange surfaces, while also preventing excessive compression; they require no high precision in the surface quality of the flange sealing surfaces that come into contact with them.

Name, Material, Range of Application, Purpose: Asbestos rubber gasket. Grade: XB=450. Type of sealing surface. Nominal pressure PN (MPa): Used for water, steam, ammonia, air, inert gases. Surface types: Flat surface, raised surface, male-female surface, grooved surface. Pressure ranges: 0.25～1.0, 0.25～2.5, 1.6～4.0, 1.6～4.0. Maximum operating temperature: 350°C. Operating conditions for gaskets: The product of pressure P (MPa) and operating temperature t (°C) must be less than or equal to 650 (MPa•°C). Flexible graphite composite gaskets; low-carbon steel (St); 0Cr19Ni9 (304); flexible graphite. Types of sealing surfaces: Nominal pressure PN (MPa). Suitable for use with steam and various corrosive media; not suitable for applications requiring high cleanliness. Surfaces available: flat, male-female, and grooved. Pressure ranges: 0.25–4.0 MPa, 1.6–5.0 MPa, 1.6–5.0 MPa. Core material: St – maximum operating temperature of 450°C; 304 – maximum operating temperature of 650°C, but ≤450°C when used with oxidizing media. Coiled gaskets: Metal strips; non-metallic strip materials. Maximum operating temperature (°C): Suitable for various media as well as highly hazardous (highly toxic) media. Note: When used with hydrofluoric acid, the material should be replaced with Monel alloy strips combined with asbestos strips. Materials include 0Cr19Ni9, 0Cr17Ni12Mo2, 0Cr17Ni14Mo2. Specialized asbestos paper, flexible graphite strips, polytetrafluoroethylene. Maximum operating temperatures: 500°C, 650°C, 200°C. Flexible graphite strips can be used at ≤450°C when dealing with oxidizing media. Used at nominal pressures of PN2.0–10.0 MPa. Grooved surfaces: without inner or outer rings; male-female surfaces: with inner ring; flat surfaces: with inner and outer rings. Metal ring gaskets: Material; maximum operating temperature (°C); hardness (HB). Suitable for high-temperature and high-pressure pipelines. Materials include soft iron 08 or 10, 0Cr13, 0Cr19Ni9, 0Cr17Ni14Mo2. Maximum operating temperatures: 450°C, 450°C, 540°C, 600°C. Hardness values: 450, 90, 120, 140, 160, 150. Used at nominal pressures of PN2.0–42.0 MPa. Names, materials, application ranges, and uses. Metal-clad gaskets: Material; maximum operating temperature (°C); hardness (HB). Suitable for use with steam, gas, oils, gasoline, solvents, and general process media. Materials include T2, 0Cr19Ni9, 0Cr17Ni14Mo2; L3, 08. Hardness values: 260, 600, 450, 450, 400, 450. Density values: 80, 160, 150, 150, 40, 120. Filling materials: Soft asbestos boards, ceramic fibers, flexible graphite, polytetrafluoroethylene. Used at nominal pressures of PN≤5.0 MPa, suitable for butt-welded flanges with flat or male-female sealing surfaces. The filling material inside the clad gasket depends on the operating temperature. PTFE-clad gaskets: Cladding layer: polytetrafluoroethylene; core layer: asbestos rubber board. Maximum operating temperature ≤150°C. Used at nominal pressures ≤4.0 MPa, suitable for flat-faced flanges. Suitable for various corrosive media and those requiring high cleanliness. Metal flat gaskets: Copper sheets. Maximum operating temperature ≤260°C, nominal pressure ≤2.5 Pa. Suitable for butt-welded flanges with flat or male-female sealing surfaces. Used for steam, methanol, propanol, ethylene glycol, benzene, etc. Pure aluminum sheets: Maximum operating temperature ≤400°C, nominal pressure ≤2.5 Pa. Suitable for butt-welded flanges with flat or male-female sealing surfaces. Used for steam, gas, oils, solvents, biphenyl, diphenyl ether, water, acetic acid, etc. High-purity aluminum is required when dealing with concentrated nitric acid

We recently had a lot of trouble with a batch of gasketing materials – they didn’t provide proper sealing, resulting in severe air leaks. What we did to solve the leakage problem was apply 704 glue to the gaskets