I read a nice article on high integrity overflow protection. In the article there is a statement that one of the key requirements of a high integrity overfill protection self certification program is "Acknowledged competency to review the design aspects of both mechanical- and/or electrical-components including component failure modes, fail-safe vs. fail-danger, any claimed automatic diagnostics, and internal redundancy in order to produce a quantitative failure rate (This number will eventually plug into calculations that determine if a particular design meets its defined SIL requirements".
I have observed many SIL (Safety Integrity Level) studies where the above competency becomes suspect. Many organisations think that just because they have completed a SIL study, they are safe. A SIL study starts from a good PHA (Process Hazard Analysis) study and here itself, if the competency of the people participating in the study is inadequate, then "garbage in, garbage out".
In many cases, there has been an overkill of recommendations from a SIL study, leading to the organization spending money unnecessarily.
Read more of the article in this link
April 28, 2010
Process Safety in LPG storage
At Vishakapatnam, the storage of LPG is being done in underground caverns as well as mounded storage. The underground storage facility is an engineering feat by itself.
"A safe method for the storage of large quantities of LPG is Cavern storage. In this method, LPG is stored in mined/artificial caverns at a depth of 160 m to 200 m below the sea level. Cavern is subjected to an external pressure by the saturated rock around the surface, which facilitates in the containment of LPG. The cavern storage is economical only for storage capacities above 50,000 mt and is feasible subject to the suitability of the rock, proximity to the ports with infrastructure for LPG receipt".
A nice description of the cavern is given by the company in this link.
For a draft paper on its construction and other details, please see this link.
HPCL, Visak has also constructed mounded storage of LPG. An article mentions that "Mounded storage of LPG i.e. creating a sand mound around the LPG storage vessels, which are placed above the ground level, is now increasingly being considered by HPCL as the best solution for protecting LPG vessels from BLEVE.
The mounded storage system provides the following advantages:
LPG stored in the form of mounded storage totally eliminates the possibility of BLEVE. The sand cover of 1 metre, which provides natural insulation from external heating, is adequate to outlast any fire in the surrounding areas. Water cooling systems are not required.
In addition, the mounding material provides good protection against most of the external influences like flying objects and pressure waves from explosions".
Read more of the article in this link
"A safe method for the storage of large quantities of LPG is Cavern storage. In this method, LPG is stored in mined/artificial caverns at a depth of 160 m to 200 m below the sea level. Cavern is subjected to an external pressure by the saturated rock around the surface, which facilitates in the containment of LPG. The cavern storage is economical only for storage capacities above 50,000 mt and is feasible subject to the suitability of the rock, proximity to the ports with infrastructure for LPG receipt".
A nice description of the cavern is given by the company in this link.
For a draft paper on its construction and other details, please see this link.
HPCL, Visak has also constructed mounded storage of LPG. An article mentions that "Mounded storage of LPG i.e. creating a sand mound around the LPG storage vessels, which are placed above the ground level, is now increasingly being considered by HPCL as the best solution for protecting LPG vessels from BLEVE.
The mounded storage system provides the following advantages:
LPG stored in the form of mounded storage totally eliminates the possibility of BLEVE. The sand cover of 1 metre, which provides natural insulation from external heating, is adequate to outlast any fire in the surrounding areas. Water cooling systems are not required.
In addition, the mounding material provides good protection against most of the external influences like flying objects and pressure waves from explosions".
Read more of the article in this link
April 26, 2010
Process Safety Information
I was reading an article where it mentions that a company in the USA was penalized for not having proper process safety information. Specifically the article mentions the following:
"The piping system was not provided with labels to indicate the contents or direction of flow. The proposed penalty is $5,600.
• The process safety information pertaining to the equipment in the process did not include the piping and instrument diagrams. The proposed penalty is $5,600.
• The process hazard analysis did not address the hazards of the process. The proposed penalty is $5,600.
• The standard operating procedures for the anhydrous ammonia rail car offloading rack did not address how the operator was to inspect the coupling or ensure that the coupling was serviceable. The proposed penalty is $5,600.
• The employer did not establish and implement written procedures to maintain the ongoing mechanical integrity of process equipment. The proposed penalty is $5,600.
• The ammonia offloading rack, including the coupling on the liquid ammonia offloading arm, had threads that were worn, resulting in the coupling coming apart, releasing more than 8,000 pounds of ammonia.
• The alarm system for evacuation voice alert was unintelligible in all locations within buildings on the plant site. The proposed penalty is $2,400".
Read the complete article in this link.
"The piping system was not provided with labels to indicate the contents or direction of flow. The proposed penalty is $5,600.
• The process safety information pertaining to the equipment in the process did not include the piping and instrument diagrams. The proposed penalty is $5,600.
• The process hazard analysis did not address the hazards of the process. The proposed penalty is $5,600.
• The standard operating procedures for the anhydrous ammonia rail car offloading rack did not address how the operator was to inspect the coupling or ensure that the coupling was serviceable. The proposed penalty is $5,600.
• The employer did not establish and implement written procedures to maintain the ongoing mechanical integrity of process equipment. The proposed penalty is $5,600.
• The ammonia offloading rack, including the coupling on the liquid ammonia offloading arm, had threads that were worn, resulting in the coupling coming apart, releasing more than 8,000 pounds of ammonia.
• The alarm system for evacuation voice alert was unintelligible in all locations within buildings on the plant site. The proposed penalty is $2,400".
Read the complete article in this link.
April 22, 2010
Process Safety - Effects of a Natural gas line rupture
Belgium's worst ever industrial disaster occurred on on July 30, 2004. At about 8:30am local time, people felt a strong smell of gas. The gas was leaking from an underground natural gas pipeline. Emergency responders arrived and were clearing the area when the gas caught fire and exploded. The official death toll was reported as 24. Please see graphic descriptions of the incident and its effects in this link.
Process Safety - oil rig explosion
An explosion has been reported at an oil rig contracted by BP. It appears that the CSB is considering investigating this incident. Please read full article in this link.
April 18, 2010
Process Safety and the Union's view
I read an interesting article about Process Safety and behaviour based safety and the unions perspective on it.In India, behaviour based safety is being bandied about by many as the ultimate solutions to all problems. Organisations have to understand that not only is the worker's behaviour responsible, it is also the behaviour of the top management that is also responsible for process safety!
Read the full article by the Steelworkers union in this link
Read the full article by the Steelworkers union in this link
April 10, 2010
Process Safety and Albert Einstein!
I read an interesting quote by Albert Einstein - " Only two things are infinite - the universe and human stupidity. And I am not so sure about the former."
Now how does this apply to Process Safety? Time and again, we see human errors and human factors being the root cause of incidents! The incidents I investigate tell me that Einstein is laughing in his grave! Will we ever learn from our past mistakes?
Lets wait and keep our fingers crossed.
Now how does this apply to Process Safety? Time and again, we see human errors and human factors being the root cause of incidents! The incidents I investigate tell me that Einstein is laughing in his grave! Will we ever learn from our past mistakes?
Lets wait and keep our fingers crossed.
Process Safety - Fire at Ankleshwar plant
A fire occurred at a pharma company in Ankleshwar. "The blaze at pharmaceutical major Wockhardt Ltd’s factory in Ankleshwar on Saturday was brought under control today. Additional fire tenders had to be called in from Vadodara, Ahmedabad and Surat and kept on standby.
“The fire was almost brought under control last night, but due to leakage of certain chemicals, there was re-ignition in some parts of the factory. The fire was completely extinguished by Sunday evening,” said Manoj Kutariya, Manager, Fire Safety, Disaster Prevention and Management Centre. . Read more in this link.
Just last month, there was a fire in another unit at Ankleshwar. I had visited the Disaster Prevention and Management Center about 6 months back and I was very impressed with the facilities and the team headed by Mr Manoj. Kudos to them.
“The fire was almost brought under control last night, but due to leakage of certain chemicals, there was re-ignition in some parts of the factory. The fire was completely extinguished by Sunday evening,” said Manoj Kutariya, Manager, Fire Safety, Disaster Prevention and Management Centre. . Read more in this link.
Just last month, there was a fire in another unit at Ankleshwar. I had visited the Disaster Prevention and Management Center about 6 months back and I was very impressed with the facilities and the team headed by Mr Manoj. Kudos to them.
Process Safety - OSHA penalises plastics plant
OSHA has penalized a plastics plant for deficiencies. The article says "The violations include the company's failure to properly contain polyvinyl chloride dust particles; evaluate contractors' safety programs and procedures; properly inspect process equipment; provide fire retardant clothing for employees; require employees to wear adequate eye protection with side shields; provide proper training; and provide employees with an infirmary, clinic, or person trained in first aid. Additionally, inspectors identified hazards involving a lack of machine guarding; a deficient process safety management program; inadequate lockout/tagout procedures for energy sources; and unguarded machinery, floor holes, and walkways. OSHA issues a serious citation when there is substantial probability that death or serious physical harm could result and the employer knew, or should have known, of the hazard".
It is interesting to note that the investigation was launched on the basis of a complaint of an employee! Read the full article in this link.
It is interesting to note that the investigation was launched on the basis of a complaint of an employee! Read the full article in this link.
April 4, 2010
Process Safety - Another day, another blast!
On Good Friday, another blast occurred in a refinery in the USA. The CSB will be investigating the incident but it appears that the CSB is now having its hands full with its investigators currently investigating other incidents. If this is the trend in the USA where PSM is mandatory, we must be very careful in India!
"A Washington state oil refinery hit by a deadly blast and fire early Friday was recently fined for safety violations amid what federal watchdogs call a troubling trend of serious accidents at refineries.
Three men died at the scene and two women died later at a Seattle hospital. Two other men were hospitalized with major burns over the majority of their bodies. It was the largest fatal refinery accident since a 2005 explosion at a BP American refinery in Texas killed 15 people and injured another 170.The Good Friday holiday blast rattled windows more than a mile away and has the most recorded fatalities since 15 workers were killed in a BP Plc incident in 2005 at that company’s Texas City, Texas, operations.
The Tesoro incident occurred as members of a seven-person crew were cleaning a heat exchanger in a unit handling naphtha, a volatile liquid chemically similar to jet fuel, Westfall told reporters.
The blast shook houses and woke people miles away, shooting flames as high as the refinery’s tower before the blaze was extinguished about 90 minutes later.
The blast occurred in a unit that was in the dangerous process of returning to operation, turning up heat and pressure, said Tesoro spokesman Greg Wright".
CSB Chairman and CEO John Bresland said, “The CSB has eighteen ongoing investigations. Of those, seven of these accidents occurred at refineries across the country. This is a significant and disturbing trend that the refining industry needs to address immediately.”
Read the complete article in this link
"A Washington state oil refinery hit by a deadly blast and fire early Friday was recently fined for safety violations amid what federal watchdogs call a troubling trend of serious accidents at refineries.
Three men died at the scene and two women died later at a Seattle hospital. Two other men were hospitalized with major burns over the majority of their bodies. It was the largest fatal refinery accident since a 2005 explosion at a BP American refinery in Texas killed 15 people and injured another 170.The Good Friday holiday blast rattled windows more than a mile away and has the most recorded fatalities since 15 workers were killed in a BP Plc incident in 2005 at that company’s Texas City, Texas, operations.
The Tesoro incident occurred as members of a seven-person crew were cleaning a heat exchanger in a unit handling naphtha, a volatile liquid chemically similar to jet fuel, Westfall told reporters.
The blast shook houses and woke people miles away, shooting flames as high as the refinery’s tower before the blaze was extinguished about 90 minutes later.
The blast occurred in a unit that was in the dangerous process of returning to operation, turning up heat and pressure, said Tesoro spokesman Greg Wright".
CSB Chairman and CEO John Bresland said, “The CSB has eighteen ongoing investigations. Of those, seven of these accidents occurred at refineries across the country. This is a significant and disturbing trend that the refining industry needs to address immediately.”
Read the complete article in this link
Process Safety – “Aging pipe fittings and plant mismanagement – a lethal combination”
An article mentions about aging pipe fittings and mismanagement. It mentions “Even the highest specification pipe fittings will fail, if they are not backed up with competent system management and the correct hardware. Too often, flanges are expected to carry more than their fair share of responsibility in preventing leaks and accidents”.
I have investigated a number of incidents where this exact reason has been the cause of a failure. This is a disturbing trend and it will help if plant management revisit their mechanical integrity program.
Read more of the article in this link
I have investigated a number of incidents where this exact reason has been the cause of a failure. This is a disturbing trend and it will help if plant management revisit their mechanical integrity program.
Read more of the article in this link
Process Safety – Shades of Bhopal?
“Bayer CropScience has agreed to pay a $143,000 fine to resolve safety citations stemming from a fatal explosion at its Institute plant in 2008.
A congressional committee report said the explosion came close to compromising a tank holding methyl isocyanate, or MIC. An MIC leak from a former Union Carbide plant in Bhopal, India, in 1984 killed thousands of people.
Union Carbide once operated the West Virginia plant, now owned by Bayer CropScience. MIC is used in the manufacture of insecticides at four different units at the sprawling 465-acre plant. One unit, the methomyl unit, was damaged in the explosion”.
Read the full article in this link
A congressional committee report said the explosion came close to compromising a tank holding methyl isocyanate, or MIC. An MIC leak from a former Union Carbide plant in Bhopal, India, in 1984 killed thousands of people.
Union Carbide once operated the West Virginia plant, now owned by Bayer CropScience. MIC is used in the manufacture of insecticides at four different units at the sprawling 465-acre plant. One unit, the methomyl unit, was damaged in the explosion”.
Read the full article in this link
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