1. The logo of the company will be independent from the name of the company. I.E. the Logo will be a shape that can stand on its own. It could relate to the SwissChemGas name, but in a very abstract way (not state the SCG initials).
2. A flame related logo is a very convenient idea, but all similar companies have a flame in their logo. LPG is what you use at home for cooking, so the flame is a very obvious idea. We need to be more unique. It could be something that resembles a flame, but we should avoid a direct link
3. As mentioned earlier, the logo should be traditional considering the industry we are in, but have a more modern/youthful touch. It needs to be related to energy, creativity, and something global
4. The company will have to do a lot with shipping, because the commodity will be mostly transported over sea. So any link to merchant ships would also be useful...
UPDATE AS OF JANUARY 2017:
Thank you very much for all your designs and your efforts. After a brief update from the management, they have advised that they want to see more logos that are not related to a flame or an oil droplet. The problem is that most oil & gas companies have a similar logo, which does not make us very unique. Therefore we need to play around with more abstract, more creative shapes. The logos that have been submitted so far are very much in line with what we are looking for and I would encourage you all to work with a similar approach, but think of different shapes or images that can be used.
Bear in mind the company has nothing to do with Switzerland, despite the name. If anything it is based in Greece, but being a global company we dont want the logo to be associated a specific country. Feel free to get creative!
Hope this helps :)