The union design provides insulation against galvanic corrosion and also breaks current flow eliminating any … In this procedure, a high voltage electrical current is applied to the component. Dielectric union fittings provide a plastic bar between the two pipes, breaking the galvanized … Source(s): https://shrinke.im/a9Lsl. Why is the test voltage so high, i.e., more than 10 times the rated input voltage? A dielectric is used between the water supply inlet and hot exit … The … APPLICATIONS: Use EPCO dielectric unions wherever dissimilar metals occur in piping and plumbing systems or where an electrically insu-lated connection is required, such as Water Stor-age Tanks • Gas Piping • Air Conditioning • Water Conditioners • Oil Piping • Plating Tanks • Water Pumps • Steam Lines. [ 8 Answers ] Good morning speedball, I am very clear on the theory of electrolysis and such between dissimiliar metals in solutions. Black pipe is for gas and a dielectric union is a plumbing fitting to join to dissimilar metal pipes. Author: e-plumber (NY) A 5" or 6" brass nipple will work but why not ask him to be sure? One side is made of copper; the other, steel. Thus, active dielectrics are the dielectrics, which can easily adapt themselves Swagelok Dielectric fittings and adapters protect the accuracy of monitoring instruments by isolating the instruments from the effects of electrical currents and maintaining full fluid flow. Brass is a copper/zinc alloy, so a brass nipple qualifies as a type of “copper alloy fitting” that is cited as acceptable by the code. … Both unions and brass are approved for use throughout water distribution and piping systems, but brass is used … (3) They shall be clean for oxygen where … You use an ordinary Black Iron "union" in the line running directly to heater and a "valve cock" shutoff right in that line and a "T" and a 4 inch drip pipe below which is capped. Molded thermoplastic insulation with excellent electrical, chemical, and … Watts Regulator Company Dielectric Unions. i. Q. I work for a commercial HVAC company. Call 877-690-4996 For Pricing and Availability . Between the two sides, there is a non-conducting washer, usually made of rubber, which prevents the metals from interacting. Dielectric Unions: Should Not Be Used Any Hot water Systems Use industrial cold to feed your water heater or boiler to transition fittings are required. It calls for an insulating material suitable for the system fluid, pressure and temperature application. Detailed info about Dielectric Unions, Couplings & Fittings. Dielectric testing is necessary to ensure that the insulating mechanism of an electrical component will withstand voltage variations under normal operating conditions. But I have read that one can use brass fittings in leiu of a dielectric device. The paragraph on dielectric fittings describes dielectric fittings as a combination fitting of copper alloy and ferrous materials with threaded, solder joint, plain or weld-neck end connections that match piping system materials. "In my experience they are better than dielectic unions because the union only has a thin … With a copper and an iron pipe, this is necessary as the combination of metals under solder could produce galvanization, leading to corrosion and failure of the pipe. To stop this type of corrosion, a fitting called a dielectric union is used to connect the two different metal pipes. Copper Water Heater Connectors Copper Water Heater Connectors DESIGN … When using such a pigtail, dielectric protection would still be required where the piping system comes up from the ground and prior to a second stage regulator, vapor meter, and/or the penetration into a building. Generally speaking, dielectric materials deteriorate more quickly at higher temperatures and the deterioration can reach a point at which the insulation ceases to perform its required function. The thermometer wells, gauges, flow meters, etc Dielectric unions: Should not be used in any hot water systems. Molded thermoplastic insulation with excellent electrical, chemical, and … For example, is it possible to screw a black malleable nipple into a threaded … Dielectric Unions: DU. To avoid this plumbers use a special coupling called a dielectric union. 1 decade ago. The black pipe will run steam from a low pressure boiler to the … Dielectric Unions Stop Galvanic Corrosion. No special tools are required and the Philmac UTC ... Dielectric (insulating) fitting ® fittings are insulating and are a “Dielectric” fitting for use between dis-similar metals. When galvanized water is exposed to certain water qualities, rust is produced and to prevent that from corroding, brass fittings can be used. Brass fittings and nipples are also commonly used as a great alternative to dielectric unions for water distribution systems. Browse Dielectric Union in the Mueller Industries Inc. catalog including Dielectric Union The relative activity of the metal is determined by … 762L Dielectric Fittings 762L Dielectric Fittings Example to create a part number:- 762L-SS-1/4-DIELECTRIC SS = 316L STAINLESS STEEL 762L-B-1/4-DIELECTRIC B = BRASS 762L-M-1/4-DIELECTRIC M = ALLOY 400 (MONEL®) 762L-HC-1/4-DIELECTRIC HC = ALLOY C-276 (HASTELLOY®) Please contact us on 0191 489 1810 or by email at sales@vfs-ltd.com to … Although they are usually used to attach pipe and fittings to mechanical supports in buildings, … Thanks for the replies. Fasteners join, or affix, two or more objects. We connect copper to steel using dielectric unions typically. Black steel pipe and dielectric unions are two words that seldom come together. James M. Lv 6. Dielectric fittings shall comply with the following requirements, and shall only be permitted where required by the manufacturer of special medical equipment to electrically isolate the equipment from the system distribution piping: Be of brass or copper construction with an approved dielectric. Feb 11, 2008, 10:14 PM. This voltage potential varies from approximately +3.0 volts to a –3.0 volts. There is an electrically non-conductive washer, usually rubber, between the two sides of the fitting which prevents the two metals from reacting. You dont need any flex line or copper or dielectric. The dielectric tester monitors the amount of … Made from advanced thermoplastic materials: The Philmac UTC® is manufactured from lightweight high performance thermoplastic materials with outstanding impact, UV, chemical and corrosion resistance. A dielectric union pipe fitting is designed to hold two types of metal pipe together, without actually soldering them. The … ... or specialized skills and professional licensure may be legally required. Using Brass or Bronze Fittings for a dielectric break 2005. The most common type of testing is the dielectric breakdown test. When your hot water heater hooks up to your water pipes, it actually creates a problem. Dielectric unions, with dielectric insulation, separate dissimilar metals (such as copper and galvanized steel) to prevent galvanic corrosion. Swagelok Dielectric fittings and adapters protect the accuracy of monitoring instruments by isolating the instruments from the effects of electrical currents and maintaining full fluid flow. It also covers factory fabricated dielectric unions … An example is shown at the top of the page. 0 0. The Hogtails are available in 12, 20, 30, 36, 48inch length with the M. POL x M. POL ends. The purpose of the dielectric withstand (hi-pot) test is to determine whether the insulation from the primary circuit to grounded or accessible parts has sufficient electric strength to withstand the normal overvoltages which could occur in service. Similarly, where are dielectric unions required? kbrotherman. Molded thermoplastic insulation with excellent electrical, chemical, and ultraviolet resistance and low water absorption maintains dielectric strength and integrity over a wide range of operating … This characteristic is known as ageing , and for each material it has been usual to assign a maximum temperature beyond which it is unwise to operate. A … While a dielectric union (shown above) provides a break in electrical conductivity that theoretically would be best, most plumbers prefer a brass fitting. Contact Taiwan Plumbing Hose supplier-CO-BILLION INDUSTRIES CO., LTD. for on Taiwantrade. What are you putting together. Series: Bolt Insulator Kits Size Range: For Pipe Sizes 1 1/2 to 12 in. Swagelok Dielectric fittings and adapters protect the accuracy of monitoring instruments by isolating the instruments from the effects of electrical currents and maintaining full fluid flow. Therefore, dielectric fittings are not required when following the uniformity of piping material. The campus shuts all … Retrieve Doc. Active dielectrics When a dielectric material is kept in an external electric field, if it actively accepts the electricity, then it is known as active dielectric material. I am wondering if using a brass and/or cast bronze fitting or valve can effectively prevent electrolysis from happening. Electric current in an inductor creates a … (40 to 300mm) Bolt Insulator Kits consist of bolt insulators that are used with flanged fittings (Watts Models 3100, 3110, and 3200) to insulate each bolt in the flange. Be permitted to be a union. Dielectric fittings that comply with the following shall be permitted only where required by the manufacturer of special medical equipment to electrically isolate the equipment from the system distribution piping: (1) They shall be of brass or copper construction with an appropriate dielectric. I find that hard to be true. Thanks. But, when stainless steel is joined to copper (in a domestic water system) will a dielectric union still be required? Dielectric Fitting. A gasket sepa-rates the two tailpieces pre-venting an electric current from passing. e-plumber----- "The society which scorns excellence in Plumbing as a humble activity and tolerates shoddiness in … The dielectric materials can be classified into active and passive dielectric materials. Re: dielectric unions on waterheaters- code required? It’s a coupling that acts as an electrical barrier between the two metals. There is some controversy as to the effectiveness of dielectric unions, but the bottom line is that if you connect a copper pipe to a galvanized one, some plumbing inspectors are going to require one. Email This Page Download PDF Download PDF Printable Page. Username Invalid characters This field is required Password Invalid ... Dielectric Fittings and Adapters. PRESSURE RATINGS: EPCO dielectric unions–250 pounds per square … Actually, in some cases it just reduces the pace of the galvanic … Certain municipalities consider a brass fitting a suitable dialectic union, but others do not. Browse Dielectric Tube Fittings in the Hoke Inc. catalog including Dielectric Unions: DU,Dielectric Male Connectors: DCM Be clean for oxygen where used for medical gases. Screw on the galvanized half of the dielectric union and tighten it, using a wrench. Username Invalid characters This field is required Password Invalid ... Dielectric Fittings and Adapters. Other available dielectric fittings include female pipe thread unions, male pipe by … • No maintenance: Once initial seal is made, no further tightening required HART Dielectric Polymer Composite Coating Hart Industrial Dielectric O-ring Unions are engineered to provide the most effective and efficient method of preventing electrolytic deterioration. (2) They shall be permitted to be a union. RE: Dielectric union requirements PEDARRIN2 … The HOKE Gyrolok Dielectric Tube Fittings are for use in applications where electrical current fl owing through a pipe or tube line must be interrupted to protect … Series 3000 Dielectric Pipe Fittings and Unions are durable, corrosion resistant fittings and unions that con-sist of a union nut and two tailpieces. One insulator is required for each bolt in a flange. Does anyone know of a reference guide which indicates which common piping materials require dielectric unions at their joints, and which metals can be joined safely without dielectric unions? Purchase Swagelok dielectric fittings in a range of sizes for direct connection to tubing or piping systems Internet Explorer 8 or 9 is not supported by this website. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. The theory that is in practice is described as follows: All metals when immersed in an electrolyte, such as water, have a voltage potential. Is brass an alternative to dielectric union?! I'm in the midst of building a micro-brewery. Fasteners and supports.