Download Dow Caustic Soda Manual

XOM Exxon Mobil Corp GE General Electric Com. MSFT Microsoft Corporatio. C Citigroup, Inc. BAC Bank Of America Corp. BP Bp Plc HBC HSBC Hldgs Plc PG. Issuu is a digital publishing platform that makes it simple to publish magazines, catalogs, newspapers, books, and more online. Easily share your publications and get. How do I specify a metallic storage tank for bulk storage of 5. Soda Na. OH and what special features must be included in the distribution piping system Chemical plant design operations FAQThe following discussion is a composite of information available from manufacturers on the internet and personal experienceStorage and transfer systems for 5. Bulk storage tanks for receipt of truck or railcar delivery typically incorporate the following features         TANK LOCATION  Careful consideration should be given to locating the bulk tank. Tank bottom elevation is important. Download Dow Caustic Soda Manual' title='Download Dow Caustic Soda Manual' />Ideally, the best location is at the same elevation as the delivery vehicle and within 2. An area that is heated and has potable water and drains for washdown available is best. If caustic soda is to be maintained and stored at 5. TANK SIZING  Storage Tanks should be sized for 1. View and Download Hyundai I30 owners manual online. I30 Automobile pdf manual download. This extra capacity is required due to the swelling experinenced on delivery. For tank truck deliveries of 4. USgallons, a 6. 00. USgallon tank is acceptable. Busan Subway Map Pdf. TRICHLOROACETIC ACID is a strong acid used as a protein precipitant in clinical chemistry and also as a caustic for removing warts. DOW Caustic Soda Solution System Design Considerations and Storage Guidelines. President Donald J. Trump has decided to advance his bogus ban on trans individuals openly serving in the US military beyond tweeting vague dictates on the matter. Download Dow Caustic Soda Manual' title='Download Dow Caustic Soda Manual' />For larger capacity, a 1. For railcar deliveries,A balance must be struck between delivery that is too frequent and the cost of continuous heating of caustic. For most users of 5. MATERIALS OF CONSTRUCTION Bulk Storage tanks of 5. Stainless steel and other alloys can also be used. Tanks of mild steel with internalexternal epoxy coatings have been used in cases where iron pick up is unacceptable. Tanks made from mild steel must not exceed 1. F to prevent caustic corrosion cracking. Polypropylene can also be used for smaller day tanks. FRP is not recommended without PEPVC or PTFE linings. TANK DESIGN General. Tanks should be specified, designed and constructed to API 6. API 6. 20 or ASME Section VIII. Because tanks in caustic soda service will have a specific gravity greater than 1. UL 1. 42 code is not acceptable. For 5. 0 caustic storage, a design specific gravity of 1. Because caustic soda is difficult to pump when the temperature gets to 6. F, Storage tanks must be heated or kept in a warm room. Electric pad heaters set at 8. F are easy to control and maintain. A shell mounted temperature gauge is useful. A periodic cleaning schedule of 2 to 4 years is suggested. Calciummagnesium hydroxide and other compounds will collect as sediment inside the tank. ShellRoof and Bottom thickness A shell and roof thickness not less than 0. A bottom thickness of 0. Aspect ratio and freeboard The configuration that typicaly yields the cheapest tank is a vertical tank with a flat bottom. Tanks that have an aspect ratio shell height to diameter of between 0. A freeboard of three inches is acceptable Anchorage and foundations Bulk tanks set on a pad are typically easier to maintain and keep clean. The pad should be a minimum of six inches high and can incorporate a leak detection configuration. Anchor bolts are not always required on flat bottomed tanks. They are only required where the tank is subject to sinificant wind or seismic loading See reference 1Foundation design should consider the incorporation of a flush clean out nozzle in the tank design Nozzle design and Sizes The inlet piping and nozzle should incorporate a dip tube a dip tube is a braced, internal pipe that prevents foaming and local erosion of the tank shellA dip tube that runs to within 1. The dip tube should discharge onto a square plate welded to the tank floorA clean out nozzle not less than 4 inches NPS, flush to the bottom of the tank will facilitate maintenance and inspection. This nozzle can be either blinded or fitted with a valve and hose connection. A spare nozzle outlet and spare vent on the roof is a good investment Venting Bulk caustic storage tanks should have a generously sized vent. Indoor tanks should be piped so that they are vented outdoors. Use a stainless steel mesh bird screen on the vent to prevent blockage. Because caustic soda is non flammable, no emergency vent system is required Overflow Bulk caustic storage tanks should have a weir type overflow that is seperate from the vent. If possible, the overflow should flow to a sump location that is obvious to the person filling the tank. Outlet Pump Suction The tank outlet should be no smaller than 3 NPSFor vertical tanks, the centerline of the pump suction nozzle should be located no closer than 1. This is to ensure that iron rich caustic and any debris stays in the tank. For horizontal tanks, the pump suction nozzle should protrude 3 inches into the tank Level Indication Gauge glasses are not recommended due to clogging and difficulty keeping warm. Ultrasonic level detection has been widely used. Some companies install a small gauge hatch on the tank roof for manual gauging Alarms A high level alarm float switch mounted on the tank shell at the 9. Some companies tie the level alarm to automated closure of a control valve on the inlet Manways As a minimum, a roof mounted 2. Tanks larger than 1. Consider a tank mounted ladder to the tank roof for manwaytank roof access Insulation Two inches of polyurethane or cellular glass is acceptable for keeping the tank below 1. F             PIPING SYSTEMS Piping systems should be seamless carbon steel, but stainless steel and other materials are acceptable, but more expensive. The entire piping system should be sloped to be free draining. Consider adding valved air purge connections to promote easy cleaning Flanges and pipe joints Butt welded and socket welded joints are recommended. Flanges and uniouns should be kept to a minimum. Flange guards splash shield inserts should be used. Valves and trim flanged, quarter turn, Plug or ball valves are recommended with PTFE trim. Ductile iron, cast iron and stainless steel have been used successfully. Dow Chemical recommends Alloy 2. PUMPS Centrifugal pumps with packing or mechanical seals are often used. Pumps with packing will become a maintenance item as the packing will allow buildup of Na. OH at the shaft. Mag drive pumps have also been used. Rotary pumps are an acceptable alternative. Pump motor sizing must consider the higher specific gravity of the liquid. OTHER CONSIDERATIONS 1    Document the tank thickness upon installation for use later. Ensure that all personnel protective equipment is used during offloading and maintenance. Safety showers,eyewash stations and potable water supply are recommended at the offload location and at transfermetering pumps. R E F E R E N C E S 1    API 6. Welded Steel Tanks for Petrolum Storage American Petroleum Institute. Aboveground Storage Tanks Phillip Myers Mc. Graw Hill Publishing. Caustic Soda OLIN Corp Chlor Alkali products Division. Dow Chemical Company various papers and guidlines. PPG Na. OH Caustic Soda Handbook 1. PPG Industries, Inc   W E B S I T E S www. PPGSBUChlor. Alkalidefault.