Pipe Insert Heaters, Asphalt Storage Tank Heaters, Industrial Oil Tank Heaters, Flanged Dry Well Heaters for High Viscosity Material Heating:
Product Description Guide-Pipe Insert Heaters/Indirect Immersion Heating:
Pipe Insert immersion heaters (also known as "indirect immersion heating") are ideal for applications where direct contact of the liquid (eg. heavy oil, bitumen/ashphalt etc.) and the heating element are to be avoided; or in large storage tanks/degreasing tanks where draining the tank, in the event a heater needs replacing, is difficult...These heaters require the installation of separate pipes inside a tank. A pipe, welded into the tank, capped at the end inside the tank, and having a flange or screw plug fitting on the open end, is ready to receive a pipe insert heater.
American National Standards Institute (ANSI) pipe insert heaters have a standard 150 lb flange but 300 lb and 600 lb flanges are also available. Screw plug pipe insert heaters are available in NPT (National Pipe Thread) and British sizes BSP, BSPP, 1"- 2 ½ " NPTand British sizes are available. To guarantee sheath material and watt density compatibility with material or process being heated consult NPH. All pipe insert heaters we offer you including heaters for hazardous locations are CSA/NRTL and UL approved.
Construction-Pipe Insert Heaters:
Pipe Insert Heaters: Specifications, Manuals, Technical Letters & Tips:
Standard Construction Features - Pipe Insert Heaters:Elements Materials — Copper, Steel, 304/316 Stainless Steel, Incoloy
Number of Elements in Flanges — 3, 6, 9, 12, 18, 21, 27, 36, 45 plus
Element Diameter — 0.315" – 0.430"
Watt Density — 6.5, 15, 23, 45, 75W/in2
Flange - Materials - Carbon Steel, Stainless Steel,
Flange Rating - 150 lb. Pressure Class per ANSI B16.5
Flange Sizes - 3", 5", 6", 8" 10", 12", 14", 150 lb.
High Conductivity Elements -
Filled with highest purity blends of magnesium oxide refractory (MgO) compacted to rock hard density to insure maximum thermal conductivity and maximum electrical resistance, and assure long element life.
Heavy Coil Construction - Watt density on the heating coil is designed for low watt density operation by increasing the coil diameter and length to give maximum coil surface area and limit coil surface temperature, providing longer coil life.
Common Industrial Heater Terminal Enclosure -Types:Safe operation of heaters equipped with these enclosures depends on employment of electrical wiring meeting National Electric Code and limiting maximum operating temperatures (including temperatures on outside of vessel, piping, flanges, screw-plugs, enclosures and other heat conducting parts) as dictated by flammable liquids, vapors, or gases present. Approved pressure and/or temperature limiting controls must be used to assure safe operation in the event of system malfunction.
Common Nema Enclosure Types – See Link Below:https://www.nphheaters.com/quote/industrial_process_heaters/technical_resource.htm#nema_enclosure
Terminal Enclosure Types - General purpose, sheet metal, (NEMA-1) painted with enamel. Moisture Resistant-Nema 4, Nema 4X, Explosion Proof Nema 7.
Grounding Connector Standard - A solid terminal connector is standard on all NPH immersion heaters insuring positive ground and personal safety.
Special Features Available:Kilowatt Ratings - 500 KW and above available
Flanges:Materials - 316, 321, 347 stainless steel. Inconel, Incoloy
Ratings - 300 lb. up to 2500 lb., pressure classes available
Sizes - 10" , 12", 14", 16", and 18" available. Please contact NPH for other materials or ratings.
Elements Materials - 316, 321, 347 stainless steel. Inconel. Other materials available, please contact NPH
Other Features - ASME Sections I, IV, and VIII designed and certified. Baffles on elements to distribute flow. Passivation on stainless steel. Immersion lengths up to 240". Underwriters Laboratories U.L./CSA listing available. Consult NPH.
National Plastic Heater Corrosion Policy:NPH cannot warrant any electric immersion heater against failure by sheath corrosion if such failure is the result of operating conditions beyond the control of the heater manufacturer. It is the responsibility of the purchaser to make the ultimate choice of sheath material based on his knowledge of chemical composition of corrosive solution, character of materials entering the solution, and controls which he maintains on the process. * Not intended for use in hazardous locations.