Frequently asked questions

We answer all your questions about our products and services.

What is propane gas?

Propane is a hydrocarbon, composed of hydrogen and carbon, extracted from oil in refining operations or from natural gas and associated gases, in oil fields.

In its natural state, propane gas is gaseous, but liquefies when exposed to room temperatures and under low pressure, reducing its volume up to 250 times, making it possible to handle, store and transport.

Propane gas, in its gaseous state, weighs twice as much as air; and in liquid state, half that of water. It is an energy source that has a higher calorific power and can reach a flame temperature of about 1,900ºC in air and 2,800ºC in oxygen.

For combustion to be optimal, propane must always remain in its gaseous state. As it liquefies starting at 44º below zero, it is ideal for outdoor installations and in cold areas, where it never liquefies.

Because propane gas is odorless and colorless in its natural state, as a security measure sulfur derivatives are added to it to detect possible leaks, due to its characteristic odor.

Another important characteristic of propane is that it is not toxic, it burns clean. It does not produce smoke or soot in combustion and it thereby preserves the environment.

What differences are there between butane gas and propane gas?

The main differences between the two energies lie in their liquefied temperatures; their transition from the gaseous state to the liquid state. While propane liquefies at 44º below zero, butane liquefies at 0º.

Thus, environmental conditions influence the storage of each product. Propane is ideal for cold areas or outdoor facilities, and butane, for indoor installations or warmer areas.

How are LPGs (Liquefied Petroleum Gases) supplied?

Liquefied Petroleum Gases can be supplied in bulk or bottled.

  • Bulk and piped
    1. Tankers load the product at the refinery or storage plants.
    2. By means of a pre-established route and depending on the orders requested, the gas containers of the customers are filled.
  • Bottled, with various sizes of packaging or bottles
    1. The bottles are filled with gas in bottling plants.
    2. According to the client's order, the bottles are replaced as they are consumed.

What advantages does Cepsa's bottled propane offer?

At Cepsa, we give you the option of having a qualified installer carry out the inspection of the installation, at a reasonable price, so that you and your family can enjoy complete peace of mind.

Is inspection of the butane bottle installation mandatory?

The owners, or failing that, the current users of the receiving facilities are responsible for commissioning a periodic inspection of their installation, using for that purpose the services of a gas installation company authorized in accordance with Royal Decree 919/2006.

What should be done with old cylinders?

If you request it, Cepsa offers you a free gas cylinder pick-up service. Your regular dealer will also return the deposit when returning the used cylinders.

How can I procure my bottles?

For the procurement of Gas cylinders, you must contact your area distributor, which will vary according to your zip code, who will be able to register you and send bottles to your home.

How can I request replacement of bottles?

To order Gas cylinders, you must call the order telephone line (+34 902 124 900), where they will take note of your home shipping request.

How do I register for e-billing?

To register, you must sign up in the Reserved Area of our website, and register for the online billing service.

To unsubscribe, you can contact us by calling +34 902 416 416 or via the email

How can I download bills?

Sign up in the reserved area of our website, and by registering for the online bills service, you can download the bills issued beginning from the time of your registration.

How can I change my bank account?

You must send the SEPA Direct Debit form by mail to: Paseo de la Castellana 259A, 19th floor. C.P. [Zip Code] 28046, Madrid (Madrid). To speed up the process, we would ask you to send us a scanned document to

How is procurement done?

The procurement is carried out through the signing of a policy that will be provided to the client by the distributor once the first supply (bottle) is delivered to the client.

Can I change the email for my user profile?

You can make this change, but not via the website. To do so, please send the old details and those you want to replace them with to

What requirements do I need for procurement?

The customer fills out and signs the policy. The customer must submit the current internal installation inspection certificate.

Can the customer use the same butane and propane installation as they currently have?

Yes, the same installation he/she has at present can be used.

What is the validity period of the inspection of the installations?

The period of validity of an inspection of the installation varies between 4 and 5 years depending on the Autonomous Community. Cepsa sends a letter to its customer reminding them when the expiration of the inspection of their installation is approaching.

Cepsa bottles weigh half as much. Does it contain half the gas?

The amount of gas is the same as in a conventional cylinder, it is the bottle that weighs half.

Where can I buy bottled butane and propane?

You can acquire it through our website, from the Cepsa app at Cepsa Service Stations.

What do you recommend to do in case of any questions?

If you detect any smell of gas or any possible malfunction in your installation, our emergency 24-hour phone line is: +34 900 100 225.