2 - Cleaning of Storage Tanks [PDF]

Zitiervorschau

Cleaning of Storage Tanks Shell HSSE & SP Control Framework Personal Safety Manual

Mandatory Restricted Version 2, December 2009

Purpose To manage the Risks associated with the cleaning of Storage Tanks.

Who is this for?  

Managers; and Contract Holders.

What situations are/are not covered This manual section applies to:  Storage Tanks for hydrocarbons, chemicals and effluent, including underground and refrigerated tanks. This manual section does not apply to:  Cavern storage; and  Pressure vessels.

Requirements The Manager is Accountable for requirements 1 to 3: 1. Apply the Hierarchy Of Control as follows: First: Minimise the need for or reduce the frequency of tank cleaning. Second: Use Online Cleaning methods that do not require the opening of, or entry into, tanks. Third: Use mechanical cleaning options that do not require people to enter tanks. Fourth: Allow personnel entry and manual cleaning of tanks where supported by a documented Risk Assessment. Reference Confined Space Work. 2. Establish and maintain Procedures for tank cleaning in accordance with Internationally Recognised Standards. 2.1. Procedures must include: 2.1.1. Pre-cleaning inspection to assess the tank contents and roof condition. 2.1.2. Precautions during gas freeing to include vehicle and personnel access restrictions, control of ignition sources and weather conditions. 2.1.3. Emergency Response arrangements during tank cleaning. 3. Apply the Permit to Work for all tank cleaning and recognise, as a minimum, the Hazards: o fire and explosion; o toxic substances and asphyxiation; o static electricity due to steam and water jetting and grit blasting; and o pyrophoric scale. The Contract Holder is Accountable for requirement 4: 4. Select a specialist Contractor for tank cleaning in line with Contractor HSSE Management.

Implementation Deadlines Businesses must now implement requirements of this manual section as soon as practicable, with risk-based prioritisation against other activities. Gap assessment and closure plan: Developed by the Businesses Latest date: June 30, 20010 Requirements into effect: Latest date:

Developed by the Businesses December 31, 2013

Assurance Protocol Requirement in manual section

Purpose To manage the Risks associated with the cleaning of storage tanks. Who is this for?  Managers; and  Contract Holders. What situations are/are not covered? This manual section applies to:  Storage tanks for hydrocarbons, chemicals and effluent, including underground and refrigerated tanks. This manual section does not apply to:  cavern storage; and  pressure vessels.

Key Words

Cleaning tanks

Survey Questions

Field Observatio ns & Document ation, Testing Review tank cleaning records Contractor documentat ion Interview Managers, Contract Holders

The Manager is Accountable for requirements 1-3 below: Requirement in manual section

1. Apply the Hierarchy of Control as follows: First: Minimise the need for or reduce the frequency of tank cleaning. Second: Use Online Cleaning methods that do not require the opening of, or Entry into, tanks. Third: Use mechanical cleaning options that do not require people to enter tanks. Fourth: Allow personnel Entry and manual cleaning of tanks where supported by a documented Risk Assessment. Reference Confined Space Work. 2. Establish and Maintain Procedures for tank cleaning in accordance with Internationally Recognised Standards. 2.1. Procedures must include: 2.1.1. Pre-cleaning Inspection to assess the tank contents and roof condition. 2.1.2. Precautions during gas freeing to include vehicle and personnel access restrictions, control of ignition sources and weather conditions. 2.1.3. Emergency Response arrangements during tank cleaning. 3. Apply the Permit to Work

Key Words

Control Hierarchy Application

Survey Questions

How have you assessed Risks during tank cleaning operations and applied the Hierarchy of Control to minimise them?

Field Observatio ns & Document ation, Testing Inspect planned maintenanc e schedules Tank cleaning Risk Assessment documents Method Statements / Job Hazard Analysis

Tank cleaning Procedures

Procedures Standards

What are the local Procedures for tank cleaning operations, what do they cover and how are they documented? How do you know that your local Procedures comply with all appropriate Internationally recognised standards?

Inspect gas free certificates Review Emergency Response Plans and equipment

PTW

How does your Permit to Work

Review

Requirement in manual section

Key Words

for all tank cleaning and recognise, as a minimum, the Hazards: o fire and explosion; o toxic substances and asphyxiation; o static electricity due to steam and water jetting and grit blasting; and o pyrophoric scale.

Survey Questions

(PTW) system cover work on tank cleaning operations? What Hazards are recognised and what Controls does the PTW require?

Field Observatio ns & Document ation, Testing actual PTW to ensure compliance with requirement s outlined in section 3

The Contract Holder is Accountable for requirement 4 below: Requirement in manual section

4. Select a competent Contractor for tank cleaning, in line with Contractor HSSE Management.

Key Words

Contractor selection

Survey Questions

How do you select your tank cleaning Contractors and assess their Competence?

Field Observatio ns & Document ation, Testing Review contract documentat ion Preselection assessment s and Competenc e documentat ion, including licences