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3.3.4

3.3.4. Operating a Dispenser to Fill DOT Cylinders by Volume . DOT cylinders are designed to be transported filled to their maximum permitted filling limits. NFPA 58, LP-Gas Code , states that large DOT cylinders having water capacities of 200 pounds or more may be filled by volume. .

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3.3.4

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  1. 3.3.4 Operating a Dispenser to Fill DOT Cylinders by Volume DOT cylinders are designed to be transported filled to their maximum permitted filling limits. NFPA 58, LP-Gas Code, states that large DOT cylinders having water capacities of 200 pounds or more may be filled by volume. • In this module you will learn to identify: • NFPA code requirements for filling cylinders by volume • Volumetric filling procedures that apply to dispenser transfer operations

  2. NFPA 58 NFPA 58 2001 2004 NFPA Code Requirements for Volumetric Filling 4.4.3.2 The volumetric method shall be limited to the following containers, where they are designed and equipped for filling by volume: • Cylinders of less than 200-lb water capacity that are not subject to DOT jurisdiction • Cylinders of 200-lb water capacity or more 7.4.3.1 (1) & (2)

  3. NFPA Code Requirements for Volumetric Filling Three points should be understood concerning 4.4.3.2: • DOT cylinders must have properly operating fixed maximum liquid level gauges and correct length dip tubes before they can be filled by volume. • Provision (1) of 4.4.3.2 means that DOT cylinders of less than 200 pounds water capacity transported in commerce (subject to DOT jurisdiction) must be filled by weight. (See footnote) A DOT motor fuel cylinder used on forklift operated only within the bulk plant can be filled by volume, because it will not be transported in commerce. Similarly, motor fuel cylinders filled at a dispenser at commercial customer locations may be filled by volume, if the cylinders are not transported off-site.

  4. NFPA Code Requirements for Volumetric Filling Three points should be understood concerning 4.4.3.2: • Provision (2) of 4.4.3.2 means that large cylinders (in excess of 200 pounds) designed for stationary installation may be filled by volume at any location. Figure 1. Stationary DOT Cylinder

  5. Procedures for Volumetric Filling

  6. Procedures for Volumetric Filling

  7. Procedures for Volumetric Filling

  8. Procedures for Volumetric Filling

  9. Time to See If You Got the Key Points of This Module… • Complete the Review on page 4. • See if you are ready for the Certification Exam by checking off the performance criteria on page 5.

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