1 THERMeX Bulletin CTCH -1. THERMeX Bolt-On Heating Systems Piping Valves Pumps Meters Instruments Tanks Vessels The THERMeX Bolt-On Heating system to the disadvantages cited for integral jacketing. I. ntegrally jacketed piping Systems and components have long been the preferred The Bolt-On system provides thermal perfor- method used with processes that require mance necessary to meet narrow-envelope elevated temperatures for efficient in-plant processing. The product Heating options are transfer of pro- versatile, rang- ducts such as ing from the sulfur, bitumens, primary function phthalic anhydride, of temperature DMT and poly- maintenance to mers. Pumpability, more thermally product quality, complex flow properties and applications of reliable equipment heat-up and operation for many melt-out, and, of these processes infrequently, depend on heat exchanger viscosity ranges duty of process controlled by Heating or temperature. cooling. Integral jacketing The THERMeX . offers the advan- Bolt-On Heating tages of unit system con- construction, high sists of two rates of heat basic product transfer from the groups which Heating medium to are discussed the process, and in more detail the ability to on subsequent maintain process- pages: ing temperatures within close tolerances.
2 ControHeat Bolt-On Jackets for valves, The disadvantages of integrally jacketed pumps, meters and other components. Systems are the limited selections available for ControTrace Heating Elements for jacketed components, relatively long deliveries piping, tanks and vessels. for these components, and inconsistencies of This brochure outlines the products and quality of the jacketed components due to the services offered by THERMeX to help designers lack of industry-wide fabrication standards. and engineers optimize performance and value The THERMeX Bolt-On Heating system is for specific Bolt-On Heating Systems . comprised of products that respond positively INTERNATIONAL. Benefits of the THERMeX Bolt-On Heating system There are several benefits that accompany the THERMeX Bolt-On Heating system . The major ones are: Component Selection Versatility. must be able to operate at elevated design Because components of the system temperatures. More than 3500 typical most often are line-size components, processing components are repre- project engineers can select from a sented in the ControHeat Jacket very broad range of standard pattern inventory.
3 Several new patterns products. The base are added to this inventory each week. component, of course, No Cross-Contamination. Defects in castings or cracks in core piping cause cross-contamination. The double-wall design of the Bolt-On Heating system eliminates the possibility Process of cross-contamination. The Heating fluid can't reach the process, and the process can't flood the Heating system . Heating Economical Temperature Control. Depending on the thermal requirements of the process, the THERMeX Bolt-On Heating system can offer significant cost savings compared to a fully jacketed processing system . In general, the cost of the Bolt-On system increases as the required temperature of the process approaches the temperature of the Heating fluid. When the design temperature envelope is very narrow, say 2-4 C, designers must carefully analyze potential chill spots to determine the optimum heat coverage. Low Maintenance Costs. Practically any piece of equipment or process component can be economically heated with a Bolt-On jacket.
4 Because standard line-size components can be used throughout the system , the replacement of individual components like a valve can be made without concerns for long lead times and crises expediting. 1. ControHeat Jackets Cover Valves THERMeX makes ControHeat Bolt-On Jackets for virtually any valve. Generally, there are two types of jacket construction offered: One-piece jackets, called UniJackets, for valves sizes 3-inch and smaller; and two-piece jackets for valves sizes 4-inch and larger. Very large valves like 20-inch gate valves may utilize more than two pieces to accommodate ease of installation. 4. 3. 2. 1. Here's How The ControHeat Jacket Works: 1. Pressurized Heating fluid enters the pressure chamber embedded in the aluminum pressure chamber may be either carbon steel or stainless steel. 2. The pressure chamber is designed, manufactured and tested in accor- dance with the ASME Boiler and Pressure Vessel Code, Sec. VIII, 3. The aluminum casting, which never contacts the pressurized Heating fluid, rapidly transfers heat from the pressure chamber to the external surface of the valve.
5 4. Normally, heat transfer cement is used with the jacket to minimize any air gap Typical Two-Piece between the casting and the valve ControHeat Valve Jacket body. The cement promotes efficient heat transfer. 2. Designed for hot-oil Control valves with vapor service, this integral jackets often two-piece require very long lead times ControHeat jacket for deliveries. Sometimes the long with flanged delivery times force instrument connections and engineers to sacrifice performance for extended coverage for availability. ControHeat Jackets allow you to select mating flanges is used in the optimum valve for the process without concern 350 C service on a 20-inch ball for the jacket. valve in a polymer reactor operation. Any ControHeat Valve Jacket can be designed to This UniJacket on an off-the-shelf sampling valve heat mating pipe flanges as shown on these plug keeps the valve plug-free, ready to operate valve jackets used in BPA service. at all times. UniJacket installed Three-way ball valves are easily heated with on ball valve.
6 THERMeX . ControHeat Jackets. Various styles of actuator insulated flexible jumpovers brackets can be accommodated. connect the jacket to ControTrace Elements Heating adjacent piping. 3. ControHeat Jackets for Pumps ControHeat Bolt-On Jackets are widely used cavity pumps may need to be heated for food- throughout the processing industry to improve stuffs such as chocolate, syrups and dairy pump efficiencies, prevent motor burnout products. In some and promote uniform batch-type operations, processing temperatures. pump jacketing may be Some critical metering needed during start-up pump applications only. In pumping require jacketing to applications like sulfur, assure accurate phthalic anhydride, or DMT, throughput. Certain not only does the pump gear pump applications casing need to be heated at all require jacketing to times, the backplate also may need minimize degradation Heating . When pump manufacturers do not of polymers and other offer jacketed backplates, THERMeX offers products that are shear both fabricated Bolt-On Heating jackets as well sensitive.
7 The barrels of progressive as ControHeat Jackets. Two Metering Diaphragm Pumps with ControHeat Jackets. The jackets cover four High-Pressure pump heads Piston Pump with as well as check 3-phase electric valve assemblies. ControHeat Jacket. Gear Pump with Mag Drive and External Relief Valve totally jacketed for hot-oil application. ControHeat Progressive Cavity Pump for use in CIP service for Jacket on mag drive used for Heating . foodstuffs. 4. ControHeat Jackets for Meters & Instruments Accurate process data and integral jackets. The ControHeat Jacket has a process performance often history of successful service with these depend on instruments, components. In fact, several meters and safety devices manufacturers of these products operating at elevated process have standardized on the temperatures. THERMeX makes ControHeat Jacket to jackets for many types of meters, complement their instruments and related equipment: product DP cells, vortex shedding meters, rupture lines.
8 Discs, coriolis flow meters, viscometers, tank vents, level indicators and chemical tees. Few of these components are available with Pulsation Dampeners with ControHeat Jackets in high- temperature applications provide Liquid Level critical service for downstream Coriolis Meter used in high tem- Indicator used in palm oil instruments and meters. The jacket perature service of pre-polymer storage application. Jacket keeps the stagnent process fluid process. Jacket is hot-oil heated completely covers all process- under the dampener's gas pad and maintains meter at 325 C. wetted surfaces. molten. Condensables in gas streams can collect and ControHeat Jacket on a Brookfield Viscometer choke the flow in flame arrestor passages. increases the instrument's operating range and longevity, ControHeat Jackets keep the passages clear. as well as improving accuracy of data collected. 5. ControTrace Elements Heat Pipe ControTrace Heating Elements have performed The most popular size of ControTrace is a very well in diverse applications from chocolate Process Piping 1 x 2 rectangular shape to polyester resin.
9 Numerous plants have with the pipe-side surface drastically curtailed their use of jacketed formed to match the out- pipe, preferring to use ControTrace side diameter of the pipe on on process piping for DMT, rosins, which it will be placed. sulfur, cyanuric chloride, acrylic Normally, a non-drying heat- acid, hot melts and numerous transfer cement is used to bottoms recirculating lines. Process promote heat transfer between Some of these plants fabricate the element and the pipe wall. the elements in the field. Others For nominal pipe sizes of 11/2 . depend on THERMeX for the and less, a smaller size of complete service of design, ControTrace ( 3/4 x11/2 ) is available. fabrication and installation of the Heat Other element sizes Bolt-On Heating system . Transfer may be ordered on ControTrace Elements are Heating Medium Cement a custom basis. formed from carbon steel, SA178 Stainless steel Gr. A boiler tubing. The elements ControTrace ControTrace is also are pressure rated in accordance Heating Element offered for very aggressive environ- with the ASME Boiler and ments.
10 Pressure Vessel Code, Section VIII, Custom Fabrication Options: Customers may opt for one of three methods to use when installing a heated piping system that utilizes ControTrace Elements. 1. THERMeX can turnkey the complete heated piping system . THERMeX provides the front-end engineering and drawings, supplies the pipe and ControTrace (securing the ControTrace on the pipe), and installs the system in your plant. Another frequently used option is the supply by THERMeX of both the piping and ControTrace Elements, installing the elements on the pipe, insulating the finished assemblies, and shipping the system to the field for installation by others. We have the flexibility, of course, to provide only specified portions of the project. 2. Based on isometric drawings provided by the customer, THERMeX spools the elements and, with the customer's approval, supplies finished ControTrace pieces, tests them, and ships them to the field, ready for installation on the pipe by others.