5.1.7 Student Book © 2005 Propane Education & Research Council Page 1

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:

5.1.7Identifying Auxiliary Equipment

UsedWith Propane Dispensers

1. Select dispenser support and mounting components

2. Select scales for cylinder filling dispenser applications

3. Select liquid meters for motor fuel dispensing

4. Identify dispenser vehicle (traffic) protection requirements

5.1.? Student Book © 2005 Propane Education & Research Council Page 1

Selecting dispenser support and mounting components

Horizontal tank dispensers may use any of the following support systems:

1. Manufactured steel supports welded to the tank by an approved ASME code shop

2. Manufacturer-designed field assembled support system

3. Manufactured steel skid system

4. Installer-fabricated and assembled support system that does not involve welding on the ASME tank

5.1.7 Student Book © 2005 Propane Education & Research Council Page 1

Courtesy Meeder Equipment Co.

Figure 1. Manufacturer Supported (ASME Code Shop)Horizontal Dispenser With Pump & Meter Cabinet

5.1.7 Student Book © 2005 Propane Education & Research Council Page 2

Courtesy Berquist, Inc.

Figure 2. Manufacturer Designed, Field Assembled Support

5.1.7 Student Book © 2005 Propane Education & Research Council Page 2

Courtesy Clean Fueling Technologies, Inc.

Figure 3. Manufactured Steel Skid Horizontal Motor Fuel Dispenser

5.1.7 Student Book © 2005 Propane Education & Research Council Page 3

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.

Courtesy Meeder Equipment Co.

Figure 4. Vertical Dispensers With

Pump & Meter Cabinet

Figure 5. Vertical Dispenser

Installation

5.1.7 Student Book © 2005 Propane Education & Research Council Page 3

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.

5.1.7 Student Book © 2005 Propane Education & Research Council Page 4

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

5.1.7 Student Book © 2005 Propane Education & Research Council Page 4

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.

Courtesy Berquist, Inc.

Figure 7. Scales & Transfer Hose Protection

5.1.7 Student Book © 2005 Propane Education & Research Council Page 5

Selecting liquid meters for motor fuel dispensing

Typically, weights and measures agencies’ minimum liquid meter requirements specify that the meter must be:

1. Designed so that the meter must be re-set to a “zero” reading prior to the start of each fuel sale

2. Designed to assure that liquid, and not vapor, is measured

3. Outfitted with a temperature compensator to assure the accuracy of the metered delivery at different temperatures adjusted to a standard temperature volume

4. 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

5.1.7 Student Book © 2005 Propane Education & Research Council Page 5

Courtesy Berquist, Inc

Figure 8. Liquid Meter With Delivery Re-Set Register

5.1.7 Student Book © 2005 Propane Education & Research Council Page 6

NFPA 582004

6.6.1.2 states that, “LP-gas containers or systems of which they are a part shall be protected from damage from vehicles.”

Factors affecting traffic protection requirements:

1. Specific requirements of state or local AHJ

2. Site features, including vehicular access

3. Type and location of dispenser supply tank(s) - AG or UG, etc.

4. Applicable company-specific standard operating procedures

Identifying dispenser vehicle (traffic) protection requirements

5.1.7 Student Book © 2005 Propane Education & Research Council Page 6

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 ProtectionProvided By Combination of

Crash Posts & Industrial Fencing

Courtesy Berquist, Inc.

5.1.7 Student Book © 2005 Propane Education & Research Council Pages 7 & 8

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.