Highly flammable liquids, regulations

Correct storage facilities for full/empty cylinders Segregation of combustible from oxidizing gases Compliance with HFL (highly flammable liquids) Regulations where applicable ... 

LPG (liquefied petroleum gas) Petroleum gas stored or proeessed as a liquid in equilibrium with vapour by refrigeration or pressurization. The two LPGs in general use are eommereial propane and eommereial butane supplied to produet speeifieations, e.g. BS 4250. (These, or mixtures thereof, eomprise LPG for the purpose of the Highly Flammable Liquids and Liquefied Petroleum Gas Regulations 1972.)... 

C, except a liquid which when tested at 55°C in the manner described in Schedule 2 to the Highly Flammable Liquids and Liquefied Petroleum Gases Regulations 1972 does not support combustion. 

Highly Flammable Liquids and Liquefied Petroleum Gases Regulations 1972... 

Herbicides, See also Pesticides, 160 Highly Flammable Liquids and Liquefied Petroleum Gas Regulations, 198, 199, 595 Hot work ... 

In most industrialized countries regulations exist governing the storage, in bulk or in drums, of highly flammable liquids. The storage of solvents which are not flammable (e.g. most chlorinated hydrocarbons) or which have a flash point above normal ambient temperature (e.g. DMF) are imHkely to be regulated imless they pose a very serious environmental hazard. 

Requirements for their safe use and storage were contained in the Highly Flammable Liquids and Liquified Petroleum Gases Regulations 1972 which have been revoked by the Dangerous Substances and Explosive Atmospheres Regulations 2002. However, they did lay down sound precautions to be taken where highly flammable materials are used and potentially explosive atmospheres arise. Their contents are summarized below ... 

The standard tests for determining the combustion characteristics of a flammable liquid are described in Schedules 1 and 2 of the Highly Flammable Liquids and Liquefied Petroleum Gases Regulations 1972V The properties of some flammable substances are given in Table 25.1. 

Made under the FA 61, the Highly Flammable Liquids and Liquefied Petroleum Cases Regulations 1972 (HFL Regs) apply to factories where... 

The Regulations define a highly flammable liquid as one which has a flash point of less than 32 C when tested by the Abel method and supports combustion when tested according to Schedule 2. 

Other important definitions of flammable substances can be found in the Classification, Packaging and Labelling of Dangerous Substances Regulations 1984 where an extremely flammable liquid is defined as one with a flash point of less than 0°C and a boiling point less than or equal to 35°C, a highly flammable liquid as one with a flash point of less than 21 °C, and a flammable substance as one with a flash point between 21°C and 55°C which when tested in accordance with Schedule 2 of the HFL Regulations does not support combustion. 

Mineral-insulated, metal-sheathed (MIMS) cable is suitable for use in most environments, but it is not so suitable for use where there may be vibration. In an old paint spray booth which predated the Highly Flammable Liquids and Liquefied Petroleum Gases Regulations, a spider-frame-mounted, electrical extractor fan had been positioned at the mouth of the extract duct and connected by MIMS cable. The fan motor was totally enclosed and explosion-protected as the paints used were flammable. The maintenance was poor and paint accumulations were allowed to build up on the fan blades causing an imbalance and vibration. This led to embrittlement of the copper sheath of the cable, which cracked and broke. Then one of the conductors fractured and sparking occurred between the ends. Ignition of the spray started a fire in the paint accumulations on nearby surfaces and the factory was burnt down. 

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