Liquefied Petroleum Gases Hazards of LP gas v

Liquefied Petroleum Gases

Hazards of LP gas v Flammable v Asphyxiant 1 a

Hazards of LP gas v Can freeze tissue on contact v Exposure limits • Butane - 800 ppm • Propane - 1000 ppm 1 b

Hazards of LP gas v Container markings • Markings to identify compliance • Name and address of supplier on container • Water capacity of the container • Designed pressure in psig 1 c

Hazards of LP gas v Container markings • Wording • Tare weight • Markings indicating maximum fill level • Outside surface area in square feet 1 d

Storage and handling requirements v Odorization v Containers, equipment, systems must be DOT-approved v Welding procedures for containers 2 a

Location of containers and regulation equipment v Containers and first-stage equipment must be located outside of buildings v Location of containers with respect to nearest important building 3 a

Location of containers and regulation equipment v Containers installed for use cannot be stacked v Ignitable materials within 10 feet of containers must be removed 3 b

Location of containers and regulation equipment v Minimum separation distances v Use dikes, diversion curbs, grading to prevent accumulation of flammable liquids 3 c

Location of containers and regulation equipment v LPG containers cannot be located in diked areas for flammable liquid tanks 3 d

Container valves, accessories, safety devices v Valves, fittings, and accessories connected directly to the container must be rated to a working pressure of 250 p. s. I. g. v Must be suitable for LP-gas service - can’t be made of cast iron 4 a

Container valves, accessories, safety devices v Connections to containers must have shutoff valves v Piping must be wrought iron or steel, brass, copper, aluminum alloy v Piping must met ANSI standards 4 b

Container valves, accessories, safety devices v Vapor piping and pipe joints must be suitable for operating pressures v Tubing must be seamless v Fittings must be appropriate for the operating pressures 4 c

Container valves, accessories, safety devices v The use of threaded cast iron pipe fittings is prohibited v Strainers, regulators, meters, compressors, and pumps are not to be considered pipe fittings 4 d

Container valves, accessories, safety devices v Hose must be made of materials resistant to liquid and vapor LPgas v Hose subjected to container pressure must be marked “LPGas” or “LPG” within 10 -foot intervals 4 e

Container valves, accessories, safety devices v Hose and hose connections must meet bursting pressure requirements v Containers and vaporizers must be provided with safety relief valves 4 f

Container valves, accessories, safety devices v Safety relief valves must be spring-loaded type 4 g

Container valves, accessories, safety devices v Valves must allow free venting to the outer air at least 5 feet away from any building opening v The rate of discharge must meet the specifications of the regulation 4 h

Container valves, accessories, safety devices v Safety relief valves must be marked with information about discharge pressures, rates v All piping and hose must be tested after assembly 4 i

Vaporizers and vaporizer housings v Indirect-fired vaporizers using steam or water must meet ASME codes 5 a

Vaporizers and vaporizer housings v 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 5 b

Filling densities v 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 6 a

Requirements for LPG in buildings v Restrictions exist for piping vapor at pressures in excess of 20 p. s. i. g into buildings v Liquid may be permitted in buildings only when the buildings meet certain construction requirements 7 a

Transferring liquids v One attendant must remain close to the transfer connection v The owner of the container must authorize filling and use v “Single-trip containers” and “Non-refillable containers” can not be refilled or reused 8 a

Transferring liquids v Maintain required distances between filling point and nearest building v Charging and gauging of fuel supply containers v Maximum vapor pressure 8 b

Transferring liquids v Transfer equipment v Shutting down equipment v Shut down open flames prior to refueling 8 c

Loading and unloading v Tank car sidings must be level v “Tank Car Connected” signs must be in place at active ends v Block car the wheels of the tanks 9 a

Loading and unloading v Have times an attendant present at all v Equipment used during loading/unloading 9 b

Loading and unloading v 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 9 c

Electrical equipment v Must meet requirements of 29 CFR 1910 Subpart S v Review Table H-28 v Keep open flames away from vaporizer rooms, pumphouses, charging rooms 10 a

Liquid-level gauging devices v Containers are equipped with a fixed liquid-level gauge v Gauges must have a design working pressure of 250 p. s. i. g. 11 a

Appliances v Appliances must be properly converted, adapted, and tested v Unattended heaters must have automatic shut off device v Appliances must be installed in accordance with NFPA standards 12 a

Cylinder systems v Containers must be marked in accordance with DOT regulations 13 a

Cylinder systems v Cylinder systems include: • Containers • Container valves • Connectors • Manifold valve assembly • Regulators • Relief valves 13 b

Systems that use otherthan-DOT approved containers v Watch service is necessary for systems that have a water capacity of 2, 000 gallons or more v Watch service must be trained in basic LPG requirements 14 a

LPG as a motor fuel v Passenger-carrying vehicles may not be fueled with passengers on board v Industrial trucks with permanently mounted containers must be charged outdoors 15 a

LPG as a motor fuel v Shut down engines while fueling v Secure fuel containers 16 a

Storage of containers awaiting use or resale v Locate so as to minimize exposure to: • excessive rise of temperature • physical damage • tampering v Do not locate near exits, stairways 17 a

LPG systems installation v 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 18 a

LPG service stations v Design pressure v Classification containers of storage 19 a

LPG service stations v Container valves, accessories, relief valves v Capacity of liquid containers 19 b

LPG service stations: installation of storage containers v Minimum distances v Remove ignitable material within 10 feet of containers v Separation distances 19 c

LPG service stations: installation of storage containers v Diking, diversion curbs, grading v Do not locate LPG containers near diked areas for flammable liquid containers v Contraction, expansion, vibration, settling 19 d

LPG service stations: installation of storage containers v Flotation v Aboveground containers v Underground containers 19 d

LPG service stations: installation of storage containers v Protection of container fittings, piping, valves v Transport points truck unloading v Equipment used for pumps and dispensing devices 19 e

LPG service stations: installation of storage containers v No smoking in fueling areas post signs v Shut off motors when fueling v Electrical equipment requirements v Approved fire extinguishers 19 f

Summary of main points v Hazards v Basic of LPG requirements v Equipment and systems v Transferring of liquids 20 a

Summary of main points v Loading/unloading of tank cars and transport trucks v DOT container systems v Non-DOT container systems 20 b

Summary of main points v LPG as motor fuel v Storage of containers awaiting use or resale v LPG installation on commercial vehicles v LPG service stations 20 c