The Advantages of using SIGRAFLEX Universal and its Properties

1. The Advantages of using SIGRAFLEX Universal and its Properties Introduction: foil reinforced with stainless steel and coated to stop leakage and enhance operational handling. In this post, we will look at the benefits of utilizing SIGRAFLEX characteristics that make it a popular sealing solution. SIGRAFLEX Universal is a high-performing gasket sheet that is popularly used in several industries, such as chemical, petrochemical, power generation, refinery, and ship building. This gasket is constructed of flexible graphite Advantages of using SIGRAFLEX Universal: Universal and the The below table shows different metrics of SIGRAFLEX Universal for several thicknesses and dimensions. The data are based on the technical data sheet provided by SGL Carbon. Unit s V1001 0C2I V1501 0C2I 1.5 1.5 1.5 1.0 1.0 V2001 0C2I V3001 0C2I Typical properties Thickness mm 1 2 3 1.5 x x 1.5 x 1.5 x Dimensions m 1.5 1.5 1.5 1.0 x x 1.0 x 1.0 x g cm³ % % ppm ppm ppm %/h 1.0 1.0 1.0 / Bulk density of graphite 1 1 1 1 Ash content of graphite (DIN 51903) Purity Total chloride content Total halogen content (Cl, F, B, I) Total sulphur content Oxidation rate in air at 670 °C (TGA) Oxidation inhibitor ≤ 2.0 ≥ 98 ≤ 25 ≤ 70 < 300 < 4 yes ≤ 2.0 ≥ 98 ≤ 25 ≤ 70 < 300 < 4 yes ≤ 2.0 ≥ 98 ≤ 25 ≤ 70 < 300 < 4 yes ≤ 2.0 ≥ 98 ≤ 25 ≤ 70 < 300 < 4 yes Passive corrosion inhibitor (ASTM F 2168- 13) yes yes yes yes Reinforcing steel sheet details Tanged stainless steel sheet ASTM material number 316L 316L 316L 316L m Thickness 0.1 0.1 0.1 0.1 m N/mm ² Number of sheets Residual stress (DIN 52913) {σD 16 h, 300 °C, 50 N/mm² } 1 1 1 2 ≥ 45 ≥ 45 ≥ 45 ≥ 45

2. The table shows that SIGRAFLEX Universal has a very consistent and high bulk density and purity of graphite, resulting in excellent thermal and chemical resistance. It also has very low ash and chloride levels, which make it avoid corrosion and contamination effortlessly. It has mild compressible material and recovery, which allows it to quickly comply to the flange surface and effectively seal gaps. provides scratches and anti-stick qualities. It also lacks significant cold or warm flow properties, therefore it does not distort or creep under pressure. It has no adhesives or binders, so it does not age or become brittle with time. These features make SIGRAFLEX Universal simple to cut, handle, and install, as well as remove and replace as needed. exceptional durability against High operational reliability and increased plant availability: SIGRAFLEX Universal offers exceptional resistance to corrosion, oxidation and medium, as well as superior blow-out resistance and mechanical strength, leading in enhanced plant availability and operational dependability. It can withstand temperatures from -269°C to 550°C and pressures up to 100 bar. It also has long-term compression and recovery stability, high temperature shifts. guarantee that SIGRAFLEX Universal can operate consistently and safely in a wide range of operating situations, reducing the likelihood of failures and downtime. Environmentally friendly and asbestos- free: SIGRAFLEX Universal is an adhesive-free and PFAS-free gasket sheet, which means it does not contain any harmful substances that could leach into the environment or pose health risks. It is also asbestos-free, which means it does not cause any respiratory problems or cancer. SIGRAFLEX Universal is a sustainable and safe sealing solution that complies with various environmental and health regulations. even These under features Properties Universal: of SIGRAFLEX ● High operational reliability, increased plant availability Good Universal has a low ash level and a high graphite purity, making it less likely to react with the majority of substances and chemicals. It can withstand gasses, solvents, and steam, as well as corrosive mediums such as oxygen, propylene oxide, and ethylene oxide. It also has a low total chloride concentration, further reducing the possibility of cracking due to stress corrosion in stainless steel flanges. chemical resistance: SIGRAFLEX ● Excellent oxidation resistance ● High blow-out resistance and mechanical strength acids, alkalis, oils, ● Very high fault tolerance during assembly and operation ● Good chemical resistance ● Long-term stability of compressibility and recovery, even under fluctuating temperatures Easy handling and assembly: SIGRAFLEX Universal is easy to handle and assemble because of its specific impermeability, which ● Good scratch resistance and antistick properties due to special impregnation

3. ● No measurable cold or warm flow characteristics up to the maximum permissible gasket stress ● No aging or embrittlement (no adhesives or binders) ● Asbestos-free (no associated health risks) ↑ Gaskets made from SIGRAFLEX UNIVERSAL ↑ UNIVERSAL gasket Flange with SIGRAFLEX Material data of SIGRAFLEX® UNIVERSAL Gasket factors (DIN E 2505 / DIN 28090-1) Gasket width bD = 20 mm at an internal pressure of σVU/0,1 10 14 17 20 1.3 200 10 14 17 20 1.3 180 12 15 18 22 1.3 160 18 23 30 35 1.3 140 10 bar 16 bar 25 bar 40 bar σBO at 300 °C N/mm² N/mm² N/mm² N/mm² N/mm² m σVO N/mm² 180 160 140 120 Gasket factors (DIN EN 13555) sKSW 40 Compression factors (DIN 28090-2) Compressibility % 35 40 40 Recovery at 20 °C Hot creep Recovery at 300 °C sKRW sWSW sWRW % % % 5 < 4 4 5 < 4 4 5 < 4 4 5 < 4 4

4. E-Modul at 20 N/mm² (DIN 28090- 1) N/mm² 850 850 850 850 „ ASTM m“- factor 2.5 2.5 2.5 2.5 „ y“- factor psi 2000 2000 2000 2000 Compressibility (ASTM F36) Recovery (ASTM F36) % % 37 15 42 14 42 14 42 14 sKRW Gasket recovery after reduction in gasket stress from 35 N/mm² to 1 N/mm² k0 x KD = σVU x bD k1 = m x bD σVU/0.1 stress needed to comply with leakage class L 0.1 (according to DIN 28090-1) Minimum gasket assembly sWSW Gasket creep compression under a gasket stress of 50 N/mm² at 300 °C after 16 h Recommended gasket assembly stress: ≥ 20 N/mm² up to σBO sWRW Recovery after reduction in gasket stress from 50 N/mm² to 1 N/mm² σBU service, where σBU is the product Minimum gasket assembly stress in The percentage changes in thickness of sKSW, sKRW, sWSW und sWRW of internal pressure pi and gasket factor m for test and in service (σBU = pi x m) are relative to the initial thickness. Conclusion: σVO 20 °C σBO at 300 °C gasket stress in service m Maximum permissible gasket stress at Maximum permissible SIGRAFLEX Universal is a versatile and reliable gasket sheet that offers many advantages and properties for various sealing applications. It is suitable for all common pipework and vessel flange designs, and temperatures, pressures, and corrosive media. It is also easy to handle and assemble, and environmentally friendly and asbestos-free. SIGRAFLEX Universal is a superior sealing solution that can improve the operational reliability and efficiency of your plant. m = σBU /pi „m“-factor Similar to m, but defined acc. to ASTM, hence different value can handle high „y“-factor Minimum gasket stress in psi k0 in mm, factor for gasket assembly stress k1 in mm, factor for gasket stress in service KD capacity under assembly conditions in N/mm², max. gasket stress-bearing sKSW Compression set under a gasket stress of 35 N/mm²