Immersion Electric industrial heating element

Mar 9, 2023
4 min read

Flanged & Screw Plug Tubular Immersion Heaters

Industrial Electric Immersion Heaters - Flange Mount and Screw Plug Mount

Product Overview

This product line covers tubular sheathed immersion heaters used to heat liquids, fluid directly inside tanks, vessels, and pipelines. Each heater consists of a bundle of hairpin-bent tubular heating elements attached to a mounting base, which can be a round flange, screw plug (threaded boss), or a customized shape such as square or triangular. The heater is inserted through an opening in the tank or vessel wall so the tube bundle sits inside the liquid ,fluid being heated, while the terminal end remains outside for electrical connection.

Tube material, tube count, flange or thread size, voltage, and wattage can all be customized according to the customer's tank design and heating requirements.

Mounting Types

Two main mounting styles are available:

• Flange Mount - the tube bundle is welded or brazed to a round, square, triangular, or custom-shaped flange, which is bolted to a matching flange on the tank or vessel. Suitable for medium to large tanks and pressure vessels.

• Screw Plug Mount - the tube bundle is fitted into a threaded brass or stainless steel boss, which screws directly into a threaded coupling on the tank. Suitable for smaller tanks and compact vessels where a bolted flange connection is not practical.

Both mounting types use the same internal tubular heating elements and differ only in how the heater attaches to the vessel, so the same core element design can serve either connection style.

Tube (Sheath) Material Options

• Stainless Steel (304 / 316L/321) - general purpose, food-grade compatible, suitable for water, mild chemicals, and most process liquids.

• Copper - excellent thermal conductivity and lower cost, suitable for clean water and non-corrosive, non-chlorinated liquids. General the copper heating elements are used for electric water heater ,non-food grade

• Incoloy (800 / 840) - high temperature resistance and oxidation resistance, suitable for higher-temperature liquids, thermal oils, and dry-fire-resistant applications.

• Titanium - superior corrosion resistance, suitable for seawater, chlorinated water, and aggressive chemical solutions.

It has good performance for anti-corrosion

Specifications

Item	Description	Options Available
Heating Element	Tubular sheathed element, hairpin (U) bent, multi-tube bundle	3, 5, 6, 7, 9, 12 tubes (custom tube count on request)
Tube / Sheath Material	Determines corrosion resistance and max working temperature	Stainless steel 304/316L/AISE321, Copper, Incoloy 800/825, Titanium
Mounting Type	Attachment to tank / vessel wall	Round flange (ANSI / DIN / customized), Screw plug (threaded boss), Square flange, Triangular flange, Custom bolt pattern
Flange / Thread Size	Common sizes; other sizes on request	NPS 1", 1-1/4", 1-1/2", 2", 2-1/2", 3"; BSP 1", 1-1/2", 2"; NPT equivalents; DIN/ANSI round flange
Flange Material	Material of mounting flange or screw plug boss	Stainless steel, Carbon steel, Brass
Voltage	Single or three phase,DC ,AC	110V, 220V, 230V, 380V, 400V, 415V (custom voltage on request), 24V,48V
Power Rating	Wattage scales with tube count and length	0.5KW - 60KW (custom wattage on request)
Terminal / Wiring	Threaded stud terminals with ceramic insulators	Standard stud terminal, sealed terminal box on request
Gasket / Sealing	Sealing between flange and vessel nozzle	PTFE gasket, asbestos-free gasket (included) Silicone rubber

Applications

This type of immersion heater is widely used across the following industries and equipment types:

Water Heating & Storage

• Commercial and industrial water heaters

• Hot water storage tanks / calorifiers

• Solar thermal storage tank backup heating

• Heat pump backup heater

Food & Beverage Processing

• CIP (clean-in-place) systems

• Brewing kettles

• Dairy pasteurizers

• Cooking oil / frying oil heating

• Sugar syrup and honey processing tanks

• Commercial coffee machine

Chemical & Process Industry

• Acid and alkali bath heating

• Electroplating and anodizing tanks

• Degreasing tanks

• Paint, ink, and resin mixing tanks

• Wax melting tanks

• Industrial washing machine , industrial washer

Textile Industry

• Dyeing baths

• Bleaching tanks

Water Treatment & Desalination

• Pretreatment tank heating

• RO feedwater heating

Other Industrial Uses

• Industrial boilers

• Washing machines and industrial laundry equipment

• Car wash and cleaning equipment hot water systems

• Aquaculture tank / pond temperature control

• Marine calorifiers and hot water systems

• Semiconductor wet-bench chemical baths and ultrapure water heating

• Mould water heater , temperature controller , oil heater for injection mould

Oil & Gas Industry

• Wellhead / flowline freeze protection for paraffin-prone crude

• Crude oil storage tank heating to keep crude above its pour point

• Produced water treatment tank heating

• Pipeline heating stations for viscous / waxy crude

• Tank farm heating for crude, fuel oil, and bitumen storage

• Refinery process heating and heat transfer fluid (hot oil) systems

• Asphalt / bitumen storage and blending tanks

Offshore platform fuel oil and produced water heating

Custom Flange / Connection Options

In addition to standard round flanges (NPS / BSP / DIN sizes) and screw plug thread connections, custom flange shapes are available, including square and triangular flanges, and custom bolt-hole patterns to match an existing vessel opening. This allows the heater to be supplied as a retrofit / OEM-compatible replacement for an existing installation.