plating, anodizing, & finishing Q&As since 1989
Gas Ovens Okay for Powder Coating
I am doing Powder/PTFE coating on industrial parts, for textile/chemical industries on job work basis. At present I have electrical oven, I want to switchover to Gas Fired oven. Please suggest whether LPG gas will serve my requirement or not? I heard that CNG Gas contains some humidity which is harmful for curing Powder/PTFE for final stage.
Kindly suggest.Harshad M. Trivedi
- Surat, Gujarat, India
Dear Harshad M. Trivedi,
Powder coatings as a primer coat is a normal process in the automotive industry. The oven usually consist of a 10 min. black wall radiant zone followed by 20 to 26 min. convection zone. Many of the paint finishing companies or paint finishing consulting companies can evaluate your requirements and help you design an appropriate oven.
- Sterling, MI, USA
Using gas (natural or LPG) for a powder-oven is no problem as long as you keep following points in mind:
- When using gas, always use indirect heating system e.g. an heat exchanger. This is to prevent the flame residues to come into the oven itself
- For small ovens, especially small chamber type ovens, temperature control with gas is less accurate than with electric heating.
- Enschede, The Netherlands
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