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5.1.7

5.1.7. Identifying Auxiliary Equipment Used With Propane Dispensers. Dispensers used to service portable cylinders require suitable scales for filling by weight. Motor fuel dispensers serving consumers’ vehicle-mounted ASME tanks need liquid meters with temperature correction features.

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5.1.7

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  1. 5.1.7 Identifying Auxiliary Equipment Used With Propane Dispensers Dispensers used to service portable cylinders require suitable scales for filling by weight. Motor fuel dispensers serving consumers’ vehicle-mounted ASME tanks need liquid meters with temperature correction features. In this module you will learn to: • Select dispenser support and mounting components • Select scales for cylinder filling dispenser applications • Select liquid meters for motor fuel dispensing • Identify dispenser vehicle (traffic) protection requirements

  2. Selecting dispenser support and mounting components Horizontal tank dispensers may use any of the following support systems: • Manufactured steel supports welded to the tank by an approved ASME code shop • Manufacturer-designed field assembled support system • Manufactured steel skid system • Installer-fabricated and assembled support system that does not involve welding on the ASME tank

  3. Courtesy Meeder Equipment Co. Figure 1. Manufacturer Supported (ASME Code Shop) Horizontal Dispenser With Pump & Meter Cabinet

  4. Courtesy Berquist, Inc. Figure 2. Manufacturer Designed, Field Assembled Support

  5. Courtesy Clean Fueling Technologies, Inc. Figure 3. Manufactured Steel Skid Horizontal Motor Fuel Dispenser

  6. Vertical tank dispensers, because of the wind loading design requirements of NFPA 58 or seismic design requirements that may apply, must utilize tank manufacturer support systems and strictly adhere to their installation instructions. Figure 4. Vertical Dispensers With Pump & Meter Cabinet Figure 5. Vertical Dispenser Installation Courtesy Meeder Equipment Co.

  7. After a vertical tank dispenser is installed, application of a specified fire retardant coating to support structures may be required. If so, the tank manufacturer should be contacted for retardant specifications and installation instructions.

  8. Selecting scales for cylinder filling dispenser applications Single-beam style scales are most frequently selected for their simplicity and durability. Figure 6. Single-Beam Scales

  9. Typical dispenser scales have 1,000 pound ratings; minimum counter poise weights up to 200 pounds should be provided that will allow the scales to properly weigh cylinders weighing up to 190 pounds when filled with propane. Figure 7. Scales & Transfer Hose Protection Courtesy Berquist, Inc.

  10. Selecting liquid meters for motor fuel dispensing Typically, weights and measures agencies’ minimum liquid meter requirements specify that the meter must be: • Designed so that the meter must be re-set to a “zero” reading prior to the start of each fuel sale • Designed to assure that liquid, and not vapor, is measured • Outfitted with a temperature compensator to assure the accuracy of the metered delivery at different temperatures adjusted to a standard temperature volume • Periodically calibrated and certified as accurate by a representative of the weights and measures agency, and usually required to be marked with a dated official calibration seal or decal

  11. Courtesy Berquist, Inc Figure 8. Liquid Meter With Delivery Re-Set Register

  12. 6.6.1.2 states that, “LP-gas containers or systems of which they are a part shall be protected from damage from vehicles.” NFPA 58 2004 • Factors affecting traffic protection requirements: • Specific requirements of state or local AHJ • Site features, including vehicular access • Type and location of dispenser supply tank(s) - AG or UG, etc. • Applicable company-specific standard operating procedures Identifying dispenser vehicle (traffic) protection requirements

  13. Typical vehicular protection methods • Concrete-filled steel crash posts set in concrete footings • Industrial (chain link wire mesh) fencing • Substantial guard rail and post barricades • Reinforced concrete barricades Figure 9. Vehicle Damage Protection Provided By Combination of Crash Posts & Industrial Fencing Courtesy Berquist, Inc.

  14. Time to See If You Got the Key Points of This Module… • Complete the Review on page 7. • See if you are ready for the Certification Exam by checking off the performance criteria on page 8.

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