New EU Energy Label for home appliances

With the New EU Energy Label for home appliances – which will come into force in March 2021 – the existing labelling system will be replaced by a uniform energy consumption scale from A to G, with a seven step color scale.

The new labelling system will not represent a one-to-one conversion of the current energy classification, as a new measurement method will be applied, making it more difficult for products to be classified with the best energy ratings: a challenge to push the market towards increasingly resource-efficient appliances.

source: Whirlpool Corporation on LinkedIn

New EU Energy Labels

Automatic enameling plant for water heaters

Depending upon the annual production volume, it might be interesting to reduce labor cost by integrating all equipment of an enameling plant for water heaters and/or solar boilers.

Such integration may be done with traditional monorail conveyors in combination with automatic transfer devices, like on the picture below.

Automatic transfer unit for large boilers
Automatic transfer unit for large boilers

Alternatively a so-called power & free conveyor system may be used.

This conveyor type consist of two conveyor tracks above each other.

Example of power and free conveyor

On the lower level free cars may run, while via the power chain at the upper level the free cars may be (dis)connected and transported.

Nowadays there are P+F systems, which thanks to a very special transfer system even include the transport of products within the enameling furnace.

Furnace with Power & Free conveyor
Enameling furnace with Power & Free conveyor

DTC may assist with the evaluation, which solution is most suitable for your vitreous enameling project.




Homepage for enamelers of water heaters

Welcome to our homepage for (future) enamelers of water heaters, hot water tanks and boilers.

Perhaps the following topics are interesting for you :

FAQ about boiler enameling

What is a porcelain enamel coating ?

Porcelain enamel is a durable glass alike coating, which is fused on a metal substrate. More >>

How about corrosion resistance ?

Studies showed that the expected lifetime of enameled boilers is much longer then alternative coatings. More >>

Is our tank suitable for powder enameling ?

Tanks should be made of  mild steel, which is suitable for enameling, and constructed in accordance with ISO 4753-3. More >>

What type of equipment is required ?

A boiler enameling plant has typically three process steps; metal pretreament, enamel application and firing. More >>

How much cost a boiler enameling plant?

The required capital investment for a modern boiler enameling plant depends on a variety of aspects.More >>

How can DTC assist ?

DTC may provide independent advice & support during all stages of your enameling plant project. More >>

Looking for a durable corrosion protection of your hot water tanks ?

Porcelain enamel provide a robust “glass-lining” to warm water tanks to protection them against corrosion caused by boiling water and is therefore used by leading manufacturers of electrical boilers, solar water heaters and/or other warm water containing applications.

Enameled mild steel tanks are typically used to eliminate expensive water tanks, made of copper and/or stainless steel, which are less suitable for operation in area’s with “poor water”.

Industrial enameling technology for boilers & hot water tanks

Porcelain enamel is used  by leading manufacturers of electric boilers, solar water heater and/or water storage tanks worldwide to protect their tanks  against corrosion.

This website describe the available technologies, plant concepts & equipment for applying a durable & cost effective porcelain enamel coating inside various types of hot water tanks.

Please make your selection below based on your primary interest :

Enameling Technology

Enameling Plant Concepts

Enameling Equipment
Wet enamel Online solution

Offline wet solution

PicklingEnamel preparation

Wet application & drying


Powder enamel Online powder solutions

Offline powder solutions

Shot blastingPowder application


Ditmer Trading & Consulting BV assist companies worldwide by providing knowledge and independent advice about porcelain enameling technology,  plants & equipment.

Related topics :

  • FAQ about boiler
  • Enameling glossary
  • Process &
    quality control equipment


Introduction to boiler enameling technology


Hot water tanks, which are typically used for (solar) boilers and water heaters, may be manufactured from either stainless steel, copper or mild steel.

The selection of the appropriate substrate depends on many factors, such as the annual production volume, the average dimensions of the tanks, expected water quality, desired product life and raw material cost.

Due to the ongoing price increases of stainless steel & copper, there is nowadays a worldwide trend towards manufacturing hot water tanks from mild steel.

HWT’s made of mild steel need to be coated internally, either with zinc, powder coating, nylon or enamel to protect it against corrosion.

According to a publication by the CISP, in which the various corrosion protection methods were compared, porcelain enamel provide the best protection (read longest life) against corrosion by boiling water.
Continue reading “Introduction to boiler enameling technology”