Gases in The Media - October 2008 Archive

23/10/2008

Summary of the following articles by Will Roberts; 

‘Highly likely’ that blast could have been prevented

8:27am Thursday 23rd October 2008

For the sake of a few pounds

7:38am Friday 24th October 2008

Acetylene gas expolosion: hundreds could have died

7:56am Friday 24th October 2008

TRAGEDY:

The wreckage of Andy Herd’s van burns in Wolsingham town centre after gas exploded as the welder drove to work

 

A FEW pounds could have saved the life of a welder killed when leaking gas cylinders in the back of his van exploded, a lawyer representing the man’s widow claimed last night.

Andy Herd died almost instantly when acetylene gas leaking into the back of his van ignited as he was driving through Wolsingham, County Durham, on May 26 last year.

The blast caused widespread destruction in the town’s market place, badly damaging shops and houses and leaving debris spread around the area.

Recording a verdict of accidental death at 33-year-old Mr Herd’s inquest yesterday, coroner Andrew Tweddle, who saw the scene of the accident first-hand, said “The evidence you have heard has revealed certain issues that we are now more aware of. It is beyond belief that we are talking here about the death of just one person, and if it was in Darlington high street, we could have been talking about 200 deaths, a massive inquiry and public outcry.” and called for more detailed advice to be made available to companies transporting dangerous gases. 

At the inquest Peter Dawson, a Health and Safety Executive specialist inspector, told jurors it was “highly likely” that the explosion could have been prevented if Mr Herd’s van had been modified by his employers, Ward Brothers, of Langley Moor, Durham City.

Mr Dawson said that guidelines laid down by the British Compressed Gases Association (BCGA) suggested that an enclosed van should have ventilation equivalent to two per cent of the van’s floorspace. 

Mr Ken Irwin of BOC, which owns the gas cylinders used by Ward Brothers, attended the scene of the accident in the centre of Wolsingham. He said that both the valve on the acetylene cylinder and the knob on the welding lance were in an open position when he inspected them.

Mr Dawson said the gas could have gradually escaped overnight while the van was parked outside Mr Herd’s home in Millrace, Wolsingham. Mr Dawson said that had more ventilation been fitted, much of the gas would have had chance to escape. Since the accident, Ward Brothers has modified three of the company’s vehicles to meet the standards set by the BCGA.

Giving evidence, John Hodges, senior scientist at the Health and Safety Laboratory, said the build up of gas may have been ignited by one of the van’s components. 

Joseph O’Brien, acting on behalf of Mrs Herd, also told jurors at yesterday’s inquest that Ward Brothers had not carried out the necessary risk assessments in relation to the Health and Safety Act.

Richard Bulmer, head of the HSE’s North-East investigation team, said: “Mrs (Melony) Ridgeway- Buckley, HM Inspector of Health and Safety, has conducted her own Health and Safety at Work investigation and has been assisting the coroner at this inquest. She will now finalise her report in the light of the inquest and we will then be considering whether or not health and safety charges should be laid.”

23rd October 2008, 08.27


19/10/2008

Oil storage tanks involved in fire and explosion at MAR Oil.

Note: Incident from 'Lessons to prevent death during hot work in, around tanks'

MAR Oil

La Rue, Ohio, October 19, 2008

2 workers killed

An explosion killed two contract workers while they were welding above a series of three interconnected crude oil storage tanks at a MAR Oil site. The explosion occurred when the workers attempted to weld a bracket on top of one of the tanks, near an atmospheric vent. Because the tanks were interconnected, oil flowing into an adjacent tank likely displaced flammable vapor into the tank being welded. The vapor escaped through the vent and was ignited by welding sparks.

The CSB investigators found that combustible gas monitor­ing was not performed prior to or during the welding. There is conflicting evidence as to whether or not the welding job was authorized by the host company. MAR Oil lacked a formal hot work program that required the hot work be identified in a written permit and be authorized by a person responsible for hot work management. The company had no formal program to select or oversee contractors, and the two contractors lacked documented training on safe hot work practices.

Applicable key lessons: Use alternatives; analyze the hazards; monitor the atmosphere; test the area; use written permits; train thoroughly; supervise contractors.

07/10/2008

View of Philip Services Corporation following a October 7, 2008, waste oil storage tank explosion.

Note: Incident from 'Lessons to prevent death during hot work in, around tanks'

Philip Services Corporation14

Kapolei, Hawaii, October 7, 2008

1 worker killed, 3 injured

A contract welder was killed while welding on a catwalk located over a 9,300-gallon waste oil storage tank at the Philip Services Corporation (PSC). Following an investigation, the Honolulu Fire Department (HFD) concluded that, during the welding, sparks dropped in and around the vent area of the tank. The contents of the tank ignited, resulting in an explosion and fire. The force of the explosion hurled the contract welder about 120 feet, fatally injuring him. Three others were injured, and the tank was thrown about 30 feet.

According to the HFD investigation, a PSC official asserted that the contractors were not authorized to weld within the dike area surrounding the tank, a hot work permit had not been issued for the welding, and combustible gas monitoring was not conducted. Conversely, the contracting company’s personnel asserted that they believed that the work was authorized and that PSC had conducted combustible gas monitoring prior to the welding activity.

Applicable key lessons: Use alternatives; analyze the hazards; monitor the atmosphere; test the area; use written permits; supervise contractors.