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Terminal loading failure data

Introduction
Petroleum product distribution terminals subject to both lower and upper tier requirements of the Control of Major Accident Hazards (COMAH) Regulations (1999) (as amended) need to identify representative major accident scenarios and assess their likelihood and severity. At distribution terminal loading racks these include product loss to the ground following loading hose detachment caused by road tanker drive-off. Whilst generic data has been published on the frequency of some major accident scenarios relevant to petroleum product distribution terminals, there is no comparable published data for this scenario.

Purpose
This page summarises terminal loading failure data collated by the Energy Institute from petroleum product distribution terminals operated by both oil companies and third party storage companies. It has been published on the website at to assist duty holders needing frequency data that is representative of the petroleum industry.

Scope
Data reported is derived from UK terminals (but not distributor depots) handling petroleum products, whatever their COMAH status. It provides mean frequencies of product loss to the ground following loading hose detachment caused by road tanker drive-off.

The sector comprises around twenty-five top tier terminals hence the data is considered representative.

Petroleum product distribution terminal loading failure data

Mean frequency per compartment loaded 

2000

2001

2002

Failed loadings due to loading hose detachment with product
loss to the ground

 1.75E-07

 8.68E-07

2.52E-07

Terminals contributing to survey

16

16

29