Regular operator safety training is an important management duty
Emptying Big-Bags (FIBC)
Type of dust
Plastic additive
Description of the plant and process
•The product was supplied in a conductive Big-Bag (FIBC type C).
•The Big-Bag (1) had conductive lifting handles (2) and was also fitted with earthing points (3) on the side.
•The lifting hooks (4) were made of metal and connected with a plastic cable (5) to the crane.
•A filling funnel (6) with sealing system (7) was used to empty the Big-Bag into the silo (8).
Course of the incident
•Dust leaked out of the improperly fitted sealing system (7) during the emptying of the Big-Bag forming a large dust cloud in the filling area.
•In order to solve the problem the operator called two further
colleagues for help.
•Shortly afterwards a dust explosion occurred in the vicinity of the filling funnel (6) and also in the Big-Bag (1).
Consequences
Due to the problem with the sealing system (7) and the formation of a large dust cloud three opera¬tors were exposed to a much greater hazard than would normally be present.
•The three operators suffered severe burns.
•Following litigation the firm had to pay tens of million Euro in
damages to the workers.
Causes
•The Big-Bag was not earthed (9) and became charged due to the emptying operation.
A spark discharge occurred from the Big-Bag (1) to the earthed metal filling funnel (6) which ignited the dust cloud formed by the leaking seal and also the dust cloud in the Big-Bag (1).
Measures
•The Big-Bag (1) must be earthed and monitored (9) before emptying starts.
•The sealing system should be improved to prevent the formation of a dust cloud in the filling area. Operators must be trained so that they are aware of the ignition hazards which arise from electrostatic charging.
You learn more comprehensive knowledge of industrial explosion protection in the latest BOSS (Booklet of Safety and Security).
Emptying Big-Bags (FIBC)
Regular operator safety training is an important management duty
Emptying Big-Bags (FIBC)
Type of dust
Plastic additive
Description of the plant and process
•The product was supplied in a conductive Big-Bag (FIBC type C).
•The Big-Bag (1) had conductive lifting handles (2) and was also fitted with earthing points (3) on the side.
•The lifting hooks (4) were made of metal and connected with a plastic cable (5) to the crane.
•A filling funnel (6) with sealing system (7) was used to empty the Big-Bag into the silo (8).
Course of the incident
•Dust leaked out of the improperly fitted sealing system (7) during the emptying of the Big-Bag forming a large dust cloud in the filling area.
•In order to solve the problem the operator called two further
colleagues for help.
•Shortly afterwards a dust explosion occurred in the vicinity of the filling funnel (6) and also in the Big-Bag (1).
Consequences
Due to the problem with the sealing system (7) and the formation of a large dust cloud three opera¬tors were exposed to a much greater hazard than would normally be present.
•The three operators suffered severe burns.
•Following litigation the firm had to pay tens of million Euro in
damages to the workers.
Causes
•The Big-Bag was not earthed (9) and became charged due to the emptying operation.
A spark discharge occurred from the Big-Bag (1) to the earthed metal filling funnel (6) which ignited the dust cloud formed by the leaking seal and also the dust cloud in the Big-Bag (1).
Measures
•The Big-Bag (1) must be earthed and monitored (9) before emptying starts.
•The sealing system should be improved to prevent the formation of a dust cloud in the filling area. Operators must be trained so that they are aware of the ignition hazards which arise from electrostatic charging.
You learn more comprehensive knowledge of industrial explosion protection in the latest BOSS (Booklet of Safety and Security).
For more information, please visit:
https://edir.bulk-online.com/oldedirredirect/205136.htm205136.htm
http://www.google.com/search?client=...UTF-8&oe=UTF-8search?client=safari&rls=de de&q=kersting+site:bulk online.com&ie=UTF 8&oe=UTF 8
Additional information:
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Attachments
kersting-1 (JPG)
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