Oct 25, 2012 ... ISGOTT 5th edition – Chapter 10 Enclosed space entry. Confined spaces ...
Tankers - ISGOTT regulations to be observed. • International safety ...
Personal Safety / Confined spaces Gothenburg, 25th October 2012 Donald WERNER
Overview of the presentation
1. Presentation of the Bureau Veritas Group 2. General precautions 3. Confined spaces
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The Bureau Veritas Group
Creation of Bureau Veritas
►
1828 : creation at Antwerp of the « Bureau de renseignements pour les assurances maritimes » by 3 marine insurers
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Aim : to keep underwriters informed of the premiums in use in various commercial centres and at the same time to provide« a detailed description of the good and bad qualities of vessels calling at the main ports of the Netherlands »
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Bureau Veritas at a Glance Broad Geographical Presence ► A global leader in conformity
assessment and certification services in the areas of quality, health and safety, environment and social responsibility (QHSE)
2011 revenue: €3.2bn
More than 900 offices in 140 countries
► Over 50.000 skilled employees ► Seven global businesses providing
Revenue breakdown
Inspection, testing, audit, certification, risk management, outsourcing, consulting and training services
► Servicing 370,000 customers across a
wide range of end markets
France 26%
EMEA* 34% * EMEA includes: • Europe – excluding France • Middle-East • Africa
Seven Global Businesses Revenue breakdown
a complete set of services
The Americas 15%
Asia Pacific 25%
Government Services & International Trade 6%
Marine 12%
Consumer Products
14%
Industry 23%
Certification
11% Construction
18%
In-Service Inspection & Verification
16% 5
Marine international network 20 local technical centres & plan approval offices
3 Regional training Centres
1500 marine technical staff: naval architects, marine engineers and surveyors
330 marine survey stations in more than 140 countries
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The BV fleet per ship type (gt)
Cargo 9,6% Other 8,5%
Bulker 34,4%
Passenger 5,4%
Container 11,9%
Gas 8,4%
Tanker 21,8%
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Some ships within Bureau Veritas register
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Role of a classification society
1. Classification of ships : a private mission of providing a level of reference standard for ship quality
2. Certification of ships : a public mission on behalf of governments and marine authorities 3. Technical assistance & consulting 9
Our Profession : QHSE Compliance
Reference Standard
Action
Deliverable
Assessment
Full Independence from any Design / Manufacturing / Contracting / Insurance
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General precautions
General precautions ►
Read carefully the personal safety instructions which are available in the work instructions and the Mini Survey Handbook.
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The surveyor must be suitably dressed for the space to be inspected
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This includes shoes, gloves & hard hat. The shoes should not give rise to a spark.
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The surveyor should carry a suitable torch, depending on the space to be inspected, an explosion-proof torch may be required
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General precautions ► Watch for :
Deck openings open or unguarded Surveying below men working overhead or beneath loads being handled Surveys of tanks or compartments during ballasting or heavy lifting of cargoes Electric welding without proper eye protection
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General precautions ► Watch for :
Badly fixed, unsteady or unguarded scaffolding
Timber of scaffolding in poor condition or overhanging
Wooden hatch covers badly secured or missing
Ladder rungs missing or in poor condition
Decks, platforms etc., slippery or icy.
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General precautions ► Do not conduct surveys alone or when workers have departed ► Internal inspections, particular care when:
Inadequate lighting
Slippery surfaces
Open manholes in stringer plates
Corroded handrails & ladders
Doubt about ventilation and atmosphere
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General precautions ► Engulfment Hazards
Loose, granular material stored in holds or tanks, such as grain, sand, coal, or similar material can engulf and suffocate a worker. The loose material can crust or bridge over and break under the weight of a worker
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Confined spaces
Confined spaces ► Definitions *)
Enclosed space means a space which has any of the following characteristics: 1. limited openings for entry and exit; 2. inadequate ventilation; and 3. is not designed for continuous worker occupancy
*) Reference: IMO MSC89/25 Appendix 23
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Confined spaces
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General precautions ► Spaces poor in oxygen include :
Spaces that contain less than 20.8%
Heavily corroded spaces : the corrosion process consumes O2
Enclosed spaces partially filled with sea or fresh water experience a reduction in O2 & the possible generation of toxic gases. Void spaces, M/E crankcases, edible oil tanks, etc.
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Confined spaces ► Dangerous spaces
Note - associated areas are considered as dangerous spaces
Gas free certificate - safe for access
Date / time of last verification - usually checked every 3 hours, assuming normal ventilation The certificate should be valid for the duration of the survey
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Confined spaces ► Toxic spaces
Spaces designed to contain toxic material
Loading areas also included as dangerous spaces
The space must not be entered if breathing apparatus is required
Special equipment for testing for toxic substances - Draeger tubes
Testing for oxygen
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Confined spaces ► Boilers
Enter when both manholes have been opened
After ventilation & cooling
If other boilers are in service check that boiler is properly isolated on steam, water and smoke sides • At least two valves between the boiler under survey and the boiler under steam
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General precautions ► The surveyor must observe the safety requirements of third
parties (shipyard, terminal, owners, authority, etc.) ► Slightest dizziness or lack of balance is a warning & the surveyor
should leave the compartment immediately
Optimum oxygen level to be 20.8 to 21%
Combustible gases less than 10% of the lower explosive limit.
Toxins within acceptable limits
Maximum hydrogen sulphide level 10ppm
Maximum benzene level 10 ppm
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Confined spaces
O2 Enriched
22
Normal
20.8 19.5
Oxygen Deficient Atmoshere
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Impaired judgement & breathing
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Faulty Judgement, Rapid Fatigue Difficult breathing, death in minutes
% OXYGEN
11 0
5
10
15
20
25 25
Confined spaces ► Flammable atmospheres
Two things make an atmosphere flammable: the oxygen in the air and a flammable gas, vapor or dust in the proper mixture Different gases have different flammable ranges. If a source of ignition is introduced into a space containing a flammable atmosphere, an explosion will result An oxygen enriched atmosphere (above 22%) will cause flammable materials, such as clothing or hair, to burn violently when ignited.
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Confined spaces ► Over 50% of workers who die in confined spaces are attempting to
rescue other workers
Rescuers must be trained in and follow established emergency procedures and use appropriate equipment and techniques (lifelines, respiratory protection, standby persons, etc) Steps for safe rescue should be included in all confined space entry procedures. Unplanned rescue, such as when someone instinctively rushes in to help a downed co-worker, can easily result in a double fatality, or even multiple fatalities if there are more than one "rescuer"
•Remember, an unplanned rescue will probably be your last
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Confined spaces ► Prior to enter a confined space, check :
When opened & how long ventilated Ventilation arrangements and means of verifying atmosphere during the survey
Whether surrounding compartments are full &, if so, with what
Nature of last cargo, if applicable
Condition of the compartment (ballast tk. Rust)
•On average, there are 200 deaths per year in the Marine Industry as a result of confined space entries
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Confined spaces Never trust your senses to determine if the air in a confined space is safe ! You can not see or smell many toxic gases and vapours, nor can you determine the level of oxygen present.
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Confined spaces ► Check the isolation of the compartment :
IG lines blanked, valves closed & marked
P/V lines blanked, valves closed & marked
Cargo / ballast lines, at least 2 valves closed & marked
Drainage / flushing of cargo pipe lines passing through the tank
Adjacent compartments not filled with toxic material
Heating coils shut off
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Confined spaces ► Ventilation arrangement
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Confined spaces Supporting documents:
► IMO - MSC89/25 Appendix 23
► IACS - Confined space safe practise
► ISGOTT 5th edition – Chapter 10 Enclosed space entry
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Confined spaces ► Prior to enter a confined space, check :
Safety & communication arrangements •
External to the compartment being surveyed
•
Internal, during the survey
Review the entry certificate / permit •
When was it issued and its validity (incl. times)
•
By whom & when next verification will be made
Tankers - ISGOTT regulations to be observed •
International safety guide for oil tankers & terminals
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Check-list for entering confined spaces ► A check-list is available in the surveyors work instructions.
Do not enter a confined space until you have considered every item of the check-list, as well as any other item of concern, and have determined the space to be safe. ► The check-list covers the following topics :
Confirmation that you will be accompanied during entry
Verification of testing equipment and qualification of testers
Testing of the atmosphere for oxygen level, toxic or flammable gases
Continuous monitoring of the atmosphere during survey
Ventilation of the confined space
Isolation of the confined space
Use of adequate clothing and safety equipment
Standby and rescue procedures
Entry permit
•Remember, the final decision is yours. If you are not confident that the space is safe for entry, do not enter it. 34
Veristar Info
www.veristar.com
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