Slide background




Confined space safe practice / IACS

ID 20836 | | Visite: 2234 | Documenti Sicurezza EntiPermalink: https://www.certifico.com/id/20836

Confined space safe practice  IACS

Confined space safe practice / IACS Rec 72 - Rev. 2.0 2007

ID 20836 | 24.11.2023 / Attached

Confined space means a space that has any of the following characteristics:

- limited openings for entry and exit; 
- unfavourable natural ventilation;
- not designed for continuous worker occupancy.

It includes, but is not limited to, boilers, pressure vessels, cargo holds, cargo tanks, ballast tanks, double bottoms, double hull spaces, fuel oil, lube oil, sewage-tanks, pump-rooms, compressor rooms, cofferdams, void spaces, duct keels, inter-barrier spaces and engine crankcases.  
...

Oxygen-deficient atmosphere.

The health effects and consequences because of lack of oxygen in a confined space are listed in the table below. These effects will take place without any warning such as odour or physical symptoms.

Health effects from lack of oxygen
O2 level Effects
22 % Oxygen enriched atmosphere
20.8% Normal level – Safe for Entry (± 0.2%)
19.5%  Oxygen deficient atmosphere
16% Impaired judgement and breathing
14% Rapid fatigue and faulty judgement
11% Difficult breathing and death in a few minutes

Lack of oxygen leads very quickly to unconsciousness and death. Lack of oxygen may be a problem in all kinds of confined spaces, it is therefore considered as the most dangerous factor when considering dangers in a confined space.

The oxygen level in a confined space can decrease because of work being done, such as welding, cutting, or brazing; or, it can be decreased by certain chemical reactions like: rusting, paint drying or through bacterial action (fermentation).

In tanks and/or voids of complicated geometry with high possibility of "pockets of atmosphere" with low O2-content, and where rescue operations may be difficult, the use of a portable oxygen meter with audible alarm is strongly recommended.

Inert gas, N2 and exhaust

Inert gas is a non-reactive gas used to prevent possible explosive atmosphere from different cargo vapours.
On Oil Tankers the most common inert gas is the exhaust from oil fired boilers, main- or auxiliary engines. On Chemical Tankers the most common inert gas is nitrogen.
Pure nitrogen is not poisonous itself, but it causes displacement of the natural breathing environment.
Exhaust contains hundreds of chemical compositions. Main components are: carbon monoxide, oxygen, nitrogen, water vapour, sulphur dioxide, nitrogen oxides and hydrocarbons. The exhaust as described above may cause reduced lung capacity and increased respiratory in addition to irritating mucous membrane in eye, nose and throat.
Total dilution of oxygen by another gas, such as carbon dioxide, will result in unconsciousness, followed by death.

Bulk Cargoes

A number of bulk cargoes may cause low level of oxygen in the cargo hold. This is mainly with cargoes like vegetables, grain, timber, forestry products, iron metals, metal sulphide concentrates and coal.

Some bulk cargoes may oxidize which may result in reduced level of oxygen, poisonous gases, or self ignition. Other bulk cargoes may produce poisonous gases without oxidation, especially when they are wet.
....

Contents

1. Definitions
1.1 Confined Space
1.2 Competent person
1.3 Responsible person
1.4 Marine Chemist

2. General Hazards

3. Confined space – Safe entry policy
3.1 General
3.2 Entering confined spaces adjacent to loaded tanks
3.3 Entering confined spaces adjacent to inerted tanks

4. Confined space - Safe entry procedure
4.1 General
4.2 Entering confined spaces adjacent to loaded tanks on double hull tankers – additional requirements

5. Permit-to-work and permit-to-enter

6. Testing of the atmosphere
6.1 General 
6.2 Testing for oxygen
6.3 Testing for flammable atmosphere
6.4 Testing for toxic atmospheres 
6.5 Testing instruments 

7. Preparation for Entering Confined Spaces
7.1 Ventilation
7.2 Isolation of Space
7.3 Standby / rescue

8. Personal Protection Equipment (PPE)  ANNEX Guidelines for safe entry of Confined Spaces
...

add attached

IACS

La International Association of Classification Societies (Associazione internazionale delle società di classificazione) o IACS è l'associazione internazionale delle società di classificazione navale, nata l'11 settembre 1968; appartengono ad essa le dodici più affidabili società di classifica al mondo.

La sua attività si svolge principalmente in coordinamento con l'Organizzazione marittima internazionale (IMO) e seguendo i criteri stabiliti nella convenzione internazionale SOLAS per garantire al massimo le condizioni di sicurezza della navigazione.

L'Italia è associata con il Registro italiano navale (RINA).

Collegati

Descrizione Livello Dimensione Downloads
Allegato riservato Confined space safe practice - IACS 2007.pdf
IACS 2007
321 kB 105

Tags: Sicurezza lavoro Rischio ambienti confinati Abbonati Sicurezza

Articoli correlati

Ultimi archiviati Sicurezza

Flammability Safe working with industrial solvents ESIG 2022
Feb 27, 2024 87

Flammability Safe working with industrial solvents

Flammability Safe working with industrial solvents / ESIG 2022 ID 21433 | 27.02.2024 / In allegato Solvents are crucial in many industrial processes and provide key properties for products such as paints, adhesives, inks, plastics and surface coatings. Many hydrocarbon and oxygenated solvents are… Leggi tutto
RISC 501 2023   Fire Safety Assessment Test for External Cladding Systems
Feb 26, 2024 83

RISC 501:2023 - Fire Safety Assessment Test for External Cladding Systems

RISC 501:2023 - Fire Safety Assessment Test for External Cladding Systems / FPA ID 21426 | 26.02.2024 Dal 1990 è in aumento il verificarsi di incendi nei sistemi di rivestimento di grandi dimensioni particolare preoccupazione in quanto il sistema di rivestimento di un edificio ha il potenziale di… Leggi tutto
Salute e sicurezza sul lavoro   Informativa del Ministro al CdM n  70 del 21 febbraio 2024
Feb 23, 2024 174

Salute e sicurezza sul lavoro - Informativa del Ministro al CdM

Salute e sicurezza sul lavoro - Informativa del Ministro al CdM n. 70 del 21 febbraio 2024 ID 21411 | 23.02.2024 Il Ministro del Lavoro e delle Politiche Sociali Marina Calderone ha svolto oggi una informativa al Consiglio dei Ministri in merito alla salute e alla sicurezza nei luoghi di lavoro,… Leggi tutto
Guida Sicurezza Industria Cavallo
Feb 20, 2024 126

Guida Sicurezza Industria del Cavallo

Guida Sicurezza Industria del cavallo ID 21394 | 20.02.2024 / In allegato Guida non vincolante alle migliori prassi per l’applicazione delle norme in materia di protezione della salute e della sicurezza dei lavoratori nell’industria del cavallo di Luigi Aversa. All'interno introduzione… Leggi tutto
Guida valutazione e gestione del rischio elettrico INAIL 2019
Feb 19, 2024 267

Guida valutazione e gestione del rischio elettrico - INAIL 2019

Guida valutazione e gestione del rischio elettrico / Quadro generale legislazione - INAIL 2019 ID 21388 | 19.02.2024 / In allegato A. Guida alla valutazione e gestione del rischio elettricoB. Il quadro generale della legislazione per la protezione dal rischio elettrico________ A. Guida alla… Leggi tutto

Più letti Sicurezza