While not addressed here, the costs and terms of natural-gas supply for an individual consumer need to be understood. Of special interest are projected savings and flexibility associated with interruptible service, balancing requirements, storage options, etc. Propane-system size and configuration depend on several factors. These include:

• size of the connected gas-consuming load,
  • maximum/minimum instantaneous flow rates
  • maximum consumption per hour and per day;
• pressure used for natural-gas distribution;
• form of standby fuel (undiluted propane, propane-air, or both) suited to the task;
• special gas applications, if any, requiring methane exlusively, such as atmosphere generators or CNG;
• expected changes in gas use (e.g., plant expansion);
• insurance requirements (e.g., FM, IRI);
• volume of propane storage needed - depending on:
  • maximum consumption rate and "number of days" backup desired;
  • requirements, if any, of the natural gas utility or other supplier;
  • available space and code or insurance constraints;
  • LP-gas sources and delivery vehicle size.

Other uses for propane - such as forklifts or vehicle fleets - should be evaluated to determine propane supply requirements and system hardware.

Use form 636EZ Confidential Gas Energy Profile in Appendix to get help with your standby system needs.