Liquefied%20Petroleum%20Gases

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Liquefied Petroleum Gases
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Hazards of LP gas

• Flammable
• Asphyxiant

1a
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Hazards of LP gas

• Can freeze tissue on contact
• Exposure limits
• Butane - 800 ppm
• Propane - 1000 ppm

1b
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Hazards of LP gas

• Container markings
• Markings to identify compliance
• Name and address of supplier on container
• Water capacity of the container
• Designed pressure in psig

1c
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Hazards of LP gas

• Container markings
• Wording
• Tare weight
• Markings indicating maximum fill level
• Outside surface area in square feet

1d
6
Storage and handling requirements

• Odorization
• Containers, equipment, systems must be
  DOT-approved
• Welding procedures for containers

2a
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Location of containers and regulation equipment

• Containers and first-stage equipment must be
  located outside of buildings
• Location of containers with respect to nearest
  important building

3a
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Location of containers and regulation equipment

• Containers installed for use cannot be stacked
• Ignitable materials within 10 feet of containers
  must be removed

3b
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Location of containers and regulation equipment

• Minimum separation distances
• Use dikes, diversion curbs, grading to prevent
  accumulation of flammable liquids

3c
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Location of containers and regulation equipment

• LPG containers cannot be located in diked areas
  for flammable liquid tanks

3d
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Container valves, accessories, safety devices

• Valves, fittings, and accessories connected
  directly to the container must be rated to a
  working pressure of 250 p.s.I.g.
• Must be suitable for LP-gas service - cant be
  made of cast iron

4a
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Container valves, accessories, safety devices

• Connections to containers must have shutoff
  valves
• Piping must be wrought iron or steel, brass,
  copper, aluminum alloy
• Piping must met ANSI standards

4b
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Container valves, accessories, safety devices

• Vapor piping and pipe joints must be suitable for
  operating pressures
• Tubing must be seamless
• Fittings must be appropriate for the operating
  pressures

4c
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Container valves, accessories, safety devices

• The use of threaded cast iron pipe fittings is
  prohibited
• Strainers, regulators, meters, compressors, and
  pumps are not to be considered pipe fittings

4d
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Container valves, accessories, safety devices

• Hose must be made of materials resistant to
  liquid and vapor LP-gas
• Hose subjected to container pressure must be
  marked LP-Gas or LPG within 10-foot intervals

4e
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Container valves, accessories, safety devices

• Hose and hose connections must meet bursting
  pressure requirements
• Containers and vaporizers must be provided with
  safety relief valves

4f
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Container valves, accessories, safety devices

• Safety relief valves must be spring-loaded type

4g
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Container valves, accessories, safety devices

• Valves must allow free venting to the outer air
  at least 5 feet away from any building opening
• The rate of discharge must meet the
  specifications of the regulation

4h
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Container valves, accessories, safety devices

• Safety relief valves must be marked with
  information about discharge pressures, rates
• All piping and hose must be tested after
  assembly

4i
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Vaporizers and vaporizer housings

• Indirect-fired vaporizers using steam or water
  must meet ASME codes

5a
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Vaporizers and vaporizer housings

• Vaporizers must be marked with
• code of the construction specifications
• allowable working pressure and temperature
• sum of the outside surface area
• inside heat exchange surface area
• name and symbol of the manufacturer

5b
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Filling densities

• Defined as the percent ratio of the weight of the
  gas in a container to the weight of water the
  container will hold at 60 degrees F

6a
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Requirements for LPG in buildings

• Restrictions exist for piping vapor at pressures
  in excess of 20 p.s.i.g into buildings
• Liquid may be permitted in buildings only when
  the buildings meet certain construction
  requirements

7a
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Transferring liquids

• One attendant must remain close to the transfer
  connection
• The owner of the container must authorize filling
  and use
• Single-trip containers and Non-refillable
  containers can not be refilled or reused

8a
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Transferring liquids

• Maintain required distances between filling point
  and nearest building
• Charging and gauging of fuel supply containers
• Maximum vapor pressure

8b
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Transferring liquids

• Transfer equipment
• Shutting down equipment
• Shut down open flames prior to refueling

8c
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Loading and unloading

• Tank car sidings must be level
• Tank Car Connected signs must be in place at
  active ends
• Block the wheels of the tanks car

9a
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Loading and unloading

• Have an attendant present at all times
• Equipment used during loading/unloading

9b
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Loading and unloading

• Loading/unloading factors
• Proximity to railroads/highways
• Nearby buildings
• Nature of occupancy
• Topography
• Construction type
• Number of cars that can be loaded/unloaded at one
  time
• Frequency of loading/unloading

9c
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Electrical equipment

• Must meet requirements of 29 CFR 1910 Subpart S
• Review Table H-28
• Keep open flames away from vaporizer rooms,
  pumphouses, charging rooms

10a
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Liquid-level gauging devices

• Containers are equipped with a fixed liquid-level
  gauge
• Gauges must have a design working pressure of 250
  p.s.i.g.

11a
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Appliances

• Appliances must be properly converted, adapted,
  and tested
• Unattended heaters must have automatic shut off
  device
• Appliances must be installed in accordance with
  NFPA standards

12a
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Cylinder systems

• Containers must be marked in accordance with DOT
  regulations

13a
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Cylinder systems

• Cylinder systems include
• Containers
• Container valves
• Connectors
• Manifold valve assembly
• Regulators
• Relief valves

13b
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Systems that use other-than-DOT approved
containers

• Watch service is necessary for systems that have
  a water capacity of 2,000 gallons or more
• Watch service must be trained in basic LPG
  requirements

14a
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LPG as a motor fuel

• Passenger-carrying vehicles may not be fueled
  with passengers on board
• Industrial trucks with permanently mounted
  containers must be charged outdoors

15a
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LPG as a motor fuel

• Shut down engines while fueling
• Secure fuel containers

16a
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Storage of containers awaiting use or resale

• Locate so as to minimize exposure to
• excessive rise of temperature
• physical damage
• tampering
• Do not locate near exits, stairways

17a
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LPG systems installation

• Applies to
• LPG system installation on vehicles used for
  commercial and construction operations
• exchangeable container systems with container
  capacities greater than 105 pounds water capacity
• systems using containers permanently mounted on
  vehicles

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LPG service stations

• Design pressure
• Classification of storage containers

19a
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LPG service stations

• Container valves, accessories, relief valves
• Capacity of liquid containers

19b
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LPG service stations installation of storage
containers

• Minimum distances
• Remove ignitable material within 10 feet of
  containers
• Separation distances

19c
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LPG service stations installation of storage
containers

• Diking, diversion curbs, grading
• Do not locate LPG containers near diked areas for
  flammable liquid containers
• Contraction, expansion, vibration, settling

19d
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LPG service stations installation of storage
containers

• Flotation
• Aboveground containers
• Underground containers

19d
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LPG service stations installation of storage
containers

• Protection of container fittings, piping, valves
• Transport truck unloading points
• Equipment used for pumps and dispensing devices

19e
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LPG service stations installation of storage
containers

• No smoking in fueling areas - post signs
• Shut off motors when fueling
• Electrical equipment requirements
• Approved fire extinguishers

19f
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Summary of main points

• Hazards of LPG
• Basic requirements
• Equipment and systems
• Transferring of liquids

20a
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Summary of main points

• Loading/unloading of tank cars and transport
  trucks
• DOT container systems
• Non-DOT container systems

20b
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Summary of main points

• LPG as motor fuel
• Storage of containers awaiting use or resale
• LPG installation on commercial vehicles
• LPG service stations

20c