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Pipe Insert Heaters, Asphalt Storage Tank Heaters, Industrial Oil Tank Heaters, Flanged Dry Well Heaters for High Viscosity Material Heating:

 Pipe Insert Heaters-Pipe Insert Flanged/Screw Plug Heaters for Asphalt Storage Tanks


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.
 Pipe Insert Heaters Tips: Both flanged and screw plug models can be used to heat a "dry well" in a tank and  are a great choice for applications requiring low watt densities such as for asphalt storage tanks and other substances having a high viscosity. In addition, removal is convenient not requiring the operator to empty the contents of their tank(s)/vessels in order to replace a failed or possibly a higher wattage heater. Pipe insert immersion heaters are designed for installation into a pipe body using standard pipe size. These heaters are available in a wide selection of rates, sizes and sheath materials suitable for the heating requirements of very viscous materials like bunker C fuel oil, temperature sensitive materials like glucose & liquid sugars, and bulk storage of corrosive materials. Pipe insert heaters are very efficient since all energy that is generated is dissipated via conduction and radiation to the inside of the pipe wall then directly through the pipe body and subsequently into the medium which is being heated. All pipe insert heater models incorporate tubular heater construction welded or brazed into a carbon steel pipe flange. Nema 1 terminal enclosures are supplied with all standard units. Moisture resistant ( Nema 4) and explosion proof  (Nema 7) models are also available. A number of sheath materials like Titanium, Incoloy, Stainless Steel, Steel, and Copper can be used as required for specific applications.

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-Flanged Style-Construction Components
Screw Plug Style-Pipe Insert-Construction Components
 Pipe Insert Heaters: Specifications, Manuals, Technical Letters & Tips:
 Flanged Immersion Heaters-Installation, Operation and Maintenance Instructions Pipe Insert Heaters Specifications.pdf
 Flanged Immersion Heaters-Installation, Operation and Maintenance Instructions How to Extend the Life of Your Pipe Insert Heater-2.pdf
 Flanged Immersion Heaters-Installation, Operation and Maintenance Instructions Pipe Insert Immersion Heaters Wiring Diagrams.pdf
 Flanged Immersion Heaters-Installation, Operation and Maintenance Instructions
Applications Guide: Pipe Insert Heaters
  • Hot Water Storage Tanks   
  • Asphalt Storage Tank Heaters   
  • Heating & Preheating All Grades of Oil
  • Food Processing Equipment   
  • Cleaning and Rinsing Tanks  
  • Heat Transfer Systems
  • Process Air Equipment   
  • Boiler Equipment   
  • Freeze Protection of Fluids   
  • Petro-Chemical
  • Oil Heating Loops   
  • Sewage Processing/Recycling/Water  Purification   
  • Caustic Solution

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:

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


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.
How To Order Pipe Insert Heaters-Flanged/Screw-Plug:
UL World Globe CSA US
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