Document gDRgyzOXrEYogxV9rpNq7MRq

Heat Exchangers SCO with silicon carbide tubes, glass lined For over 130 years, Pfaudler is the leader in developing new technologies to meet the highly specific chemical processing needs of its clients. One reason why our glass-lined equipment is trusted by over 90% of the world's top chemical companies is the sheer reliability of our reaction technologies and comprehensiveness of our glasslined accessories. These technologies are critical to the safe containment of corrosive contents, maintaining the vessel pressure and ensuring the final batch quality. In short, our glass-lined technologies are absolutely integral to an effective process. PRODUCTS & EQUIPMENT Glass Lined Reactors Glass Lined Mixing Systems Baffling Technologies Storage Tanks & Receivers Glass Lined Columns Accessories Glass Lined Instrumentation Glass Lined Heat & Mass Transfer ACID CONCENTRATION H2SO4 | HNO3 PH VALUE 2.0 GlasSiC tubesheet 4 SCO Heat Exchangers Glass-lined with silicon carbide tube bundle The SCO series is a range of high efficiency glass-lined heat exchangers, with silicon carbide tube bundle for use with highly corrosive fluids. Typical application The SCO heat exchanger is well suited for a very wide variety of uses: heating, cooling, evaporating and condensing. Heat transfer surface 0,3 to 73 m2 (3 to 788 sq.ft) Construction design The SCO heat exchanger design is based on the traditional shell and tube with fixed tube sheets configuration. Tube sheets and design data The tube sheets can be supplied into two versions: either PTFE or glass-lined. The version with PTFE tube sheets has the following operating range (tube and shell side): Dimensions: Max. DN 300 (12") Pressure: -1 to 6 bar (FV to 90 PSIG) Temperature: -30 C to +165 C. ** The GlasSiC version has glass-lined tubesheets with a wider operation range: Dimensions: Max. DN 300 (12"). Pressure: -1 to 6 bar (FV to 90 PSIG) Temperature: -30C to +200 C. ** The tube sheets of the GlasSiC version can be double to prevent any contact between product and heating or cooling media in the event of leakage in the joints between tubes and tubesheet. This double tubesheet is provided with a leak collectiong circuit that can be alarmed to give instantaneous warning of leakage. The double tube sheets can be supplied with the glass-lining on shellside, tubeside or both. (*) (**) Design and calculation codes VSR/ISPESL, AD-Merkbltter/TV, SVTI, ASME VIII div. 1, CE stamp (PED). Construction tolerances To DIN 28006 T2 Thermal design On request, our Eng. Dep. can provide also the thermal design, using the most advanced software available today. A "Heat Exchanger Specification Sheet" is available for your process data communication. PTFE tubesheet * For larger size or different design data, please contact Pfaudler. ** Design temperature according to product and medium type. 5 SCO Heat Exchangers Glass-lined with silicon carbide tube bundle Constructional features The bundle is formed by Hexoloy SA tubes (a special type of silicon carbide). The shell and heads can be in glasslined steel, stainless steel or carbon steel depending on the corrosiveness of the process fluid. The corrosive fluid can flow in the shell side, tube side or both at the same time. If there is no particular necessity, shellside flow is preferred. Each tube is fixed individually to the tubesheet by a special system with double O-Rings. This permits very high operating pressures and wide temperature variations. The tubes are free to expand or to contract but their movement is limited within the sleeves pressing the O-Rings. The heat transfer on the shellside is optimized by baffles which also support the tubes to minimize their vibration. Baffles, spacers and tie-rods are of glass-reinforced PTFE. FDA approval on request . Special versions Multipass tube side Multipass shell side Glass-lining Shell and/or distributors: Standard glass Available also specialized for specific requirements (impact, resistance, abrasion resistance, non-stick properties, etc.). More specific data can be obtained from our Laboratories. Test and inspection of the glass-lining Visual inspection Thickness check of the coating Statiflux (electrified particle test) Spark test to ISO 2746: at 20.000 V immediately after glass-lining at 12.000 V prior to shipment Installation and supports Vertical on brackets Horizontal or inclined on saddles 6 SCO Heat Exchangers Hexoloy SA SiC tube bundle The Hexoloy SA used for the heat exchanger tubes is produced by pressureless sintering of ultra-pure submicron alpha silicon carbide powder. The sintering process (above 2000 C) resultes in self-bonded, fine grain (less than 10m) SiC product which is extremely hard, lightweight, virtually not porous, with an as-fired finish and a greater than 98% theoretical density. Hexoloy SA is highly resistant to corrosion, erosion, sliding wear, high temperature and thermal shock. Thanks to its exceptional physical and chemical properties the Hexoloy SA can be used for critical applications where it can replace at the same time ceramics or high alloy. Corrosion resistance Hexology SA contains no free silicon, which makes it highly chemically resistant in both oxidizing and reducing environments. The virtually universal corrosion resistance of Hexoloy SA permits superior performance in environments of hot gases and liquids including strong acids and bases, even at extremely high temperatures. Erosion resistance Hexoloy SA is one of the hardest high performance materials available: second only to diamonds, 50% harder than tungsten carbide and ten times harder than conventional stainless steel. This extreme hardness combined with high purity and fine micro-structure made Hexoloy SA particularly resistant to wear and erosion under mechanically abrasive conditions. Thermal properties The thermal conductivity is so high that makes the SiC wall as virtually non-existent in resisting heat transfer processes. Because of this high thermal conductivity combined with a low coefficient of thermal expansion, Hexoloy SA is very resistant to thermal shock and will survive rapid thermal cycling as compared to conventional materials. Mechanical properties Hexoloy SA exhibits excellent strength at room temperature and maintains that strength even at elevated temperatures due to its single phase fine grain structure. Hexoloy SA's compressive strength is 10 times greater than its tensile strength. 7 SCO Heat Exchangers Hexoloy SA SiC: Properties and data Physical properties of Hexoloy SA tubes (at room temperature) Density Flexural strength Compressive strength Modulus of elasticity Knoop hardness Poisson ratio Thermal conductivity @ 20 C Thermal conductivity @ 200 C Mean specific heat Coefficient of thermal expansion Thermal shock Permeability R to 1000 C Erosion/Abrasion kg/dm3 3,1 lb/in3 N/mm2 462 psi N/mm2 3.860 psi N/mm2 406.800 psi N/mm2 28.000 psi - 0,14 - W/mK 125,6 Btu/ft h F W/mK 102,6 Btu/ft h F KJ/kgK 0,67 Btu/lb F 1/C 3,96*10-6 1/F C >260 F Impervious to gases over 31 MPa 50% harder than Tungsten Carbide 0,112 67*103 560*103 59*106 3,98*106 0,14 72,6 59,3 0,16 2,2*10-6 >500 Silicon Carbide Tantalum Carbon Steel (C=0.2%) Zirconium Titanium Stainless Steel 304 Inconel Hastelloy B Hastelloy C Glass PTFE/PFA/FEB The thermal conductivity of SiC in comparison with other materials Materials Silicon Carbide Tantalum Carbon Steel (C=0.2%) Zirconium Titanium Stainless steel 304 Inconel Hastelloy B Hastelloy C Glass PTFE/PFA/FEP Thermal conductivity W/mK Btu/ft h F 125,6 72,6 54,5 31,5 50 28,9 23,8 22 15 15 11,2 10,1 1,16 0,225... 0,467 13,8 12,7 8,7 8,7 6,48 5,84 0,67 0,13... 0,27 W/mK 140 120 100 80 60 40 20 0 Tubes features High thermal conductivity (very high heat transfer coefficient and very wide thermal shock limits) Virtually universal corrosion resistance (even up to 200 C) Do not contain any binder (high purity, no contamination) Extreme hardness (high erosion and wear resistance) No porosity (total non-permeability at extreme temperature and pressure) Anti-stick property (minimize scaling and fouling) Every single tube is proof tested with a pressure of 186 bar (2700 psi) Material approved by: FDA (Food and Drug Administration) WRC (Water Research Center) DVGW (Deutsche Vereinigung des Gasund Wasserfaches, German Federal Health Office) 8 10 SCO GlasSiC Series With glass-lined tube sheets N2 N7 N6 SiC tube - glasslined tubesheet connections Fig. 1: Simple tubesheet shellside glass-lining N4 Fig. 2: Double tubesheet shellside glass-lining Fig. 3: Double tubesheet shellside and tubeside glass-lining 1 N1 N5 N3 2 Dimensions Nozzles DN tube OTL A B1 B2 C D E1 E2 F1 F2 F3 F4 G1 G2 H1 H2 H3 L1 L2 N SD SG N1 N2 N3 N4 N5 N6 N7 no. mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm no. DN DN DN DN DN DN DN 100 8 90,79 260 260 59 114,3 125 125 130 125 125 130 130 110 135 125 125 160 5 5 40 25 25 40 25 50 25 150 22 141,15 290 290 59 168,3 135 135 165 150 150 165 160 135 170 165 150 200 7 5 50 25 25 50 50 80 25 200 42 192,49 330 330 59 219,1 150 150 190 180 180 190 180 145 200 190 180 210 7 6 50 25 25 50 50 100 25 250 64 234,82 400 400 59 273,0 170 170 225 205 205 225 220 170 225 225 205 260 7 6 80 25 25 80 80 150 25 300 96 285,87 410 410 69 323,8 175 175 250 230 230 270 220 175 260 250 230 265 10 8 80 32 32 80 80 150 32 A = L - 2 x (C-14,5) Effective tube length DN L (mm) Tube length 750 1000 1250 1750 2500 3000 100 661 911 1161 1661 150 911 1161 1661 2411 200 911 1161 1661 2411 2911 250 1161 1661 2411 2911 300 1641 2391 2891 3 Heat transfer surface m2 DN L (mm) Tube length 750 1000 1250 1750 2500 3000 100 0,23 0,32 0,42 0,58 150 0,88 1,12 1,61 2,33 200 1,68 2,14 3,07 4,45 5,38 250 3,27 4,68 6,79 8,19 300 6,93 10,10 12,21 L2 Baffle distance DN L (mm) Tube length 750 1000 1250 1750 2500 3000 100 92 103 108 94 150 85 95 104 109 200 130 125 122 121 120 250 170 141 156 146 300 192 186 196 N Baffle numbers DN L (mm) Tube length 750 1000 1250 1750 2500 3000 100 4 6 8 14 150 6 8 12 18 200 4 6 10 16 20 250 4 8 12 16 300 6 10 12 DN 100 DN 150 DN 200 DN 250 DN 300 14 1,5 26 Tube dimensions, layout and pitch 11 SCO Series With PTFE tube sheets N2 N7 N6 N4 Main flanged connection Fig. 1: Shell in glass-lined steel Fig. 2: Shell in carbon steel or stainless steel SD A N1 N5 N3 Dimensions Nozzles DN tube OTL A B1 B2 C D E1 E2 F1 F2 F3 F4 G1 G2 DN H1 H2 H3 L1 L2 LHTS N SD SG N1 N2 N3 N4 N5 N6 N7 no. mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm no. DN DN DN DN DN DN DN 100 13 94 260 260 70 114,3 125 125 130 125 125 130 130 110 100 135 125 125 160 5 5 40 25 25 40 25 50 25 150 31 136 290 290 80 168,3 135 135 165 150 150 165 160 135 150 170 165 150 200 7 5 50 25 25 50 50 80 25 200 55 180 330 330 94 219,1 150 150 190 180 180 190 180 145 200 200 190 180 210 7 6 50 25 25 50 50 100 25 250 85 225 400 400 102 273,0 170 170 225 205 205 225 220 170 250 225 225 205 260 7 6 80 25 25 80 80 150 25 300 139 294 410 410 120 323,8 175 175 250 230 230 270 220 175 300 260 250 230 265 10 8 80 32 32 80 80 150 32 LHTS (Effective tube length) DN L (mm) Tube length 750 1000 1250 1750 2500 3000 100 670 920 1170 1670 150 892 1142 1642 2392 200 864 1114 1614 2364 2864 250 1086 1586 2336 2836 300 1554 2304 2804 1 A 2 Heat transfer surface m2 DN L (mm) Tube length 750 1000 1250 1750 2500 3000 100 0,38 0,53 0,67 0,95 150 1,22 1,56 2,24 3,26 200 2,09 2,69 3,90 5,72 6,93 250 4,06 5,93 8,73 10,60 300 9,50 14,09 17,14 N Baffle numbers DN L (mm) Tube length 750 1000 1250 1750 2500 3000 100 4 6 8 14 150 6 8 12 18 200 4 6 10 16 20 250 4 8 12 16 300 6 10 12 A DN L (mm) Tube length 750 1000 1250 1750 2500 3000 100 684 934 1184 1684 150 910 1160 1660 2410 200 884 1134 1634 2384 2884 250 1112 1612 2362 2862 300 1584 2334 2834 L2 Baffle distance DN L (mm) Tube length 750 1000 1250 1750 2500 3000 100 102 110 112 96 150 87 96 105 110 200 125 123 120 120 120 250 157 136 152 144 300 184 182 193 DN 300 DN 250 DN 100 DN 150 DN 200 14 1,5 26 Tube dimensions, layout and pitch Worldwide Presence MEXICO USA UK FRANCE NETHERLANDS GERMANY SWITZERLAND ITALY INDIA SOUTH KOREA CHINA SINGAPORE BRAZIL GMM Pfaudler is a global leader in corrosion-resistant technologies, systems, and services for the chemical, pharmaceutical, food and energy industry. 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