Tank Design

Tank Components

1.     Internal Ladder                                          6.    Ball Valve Housing

2.    External Ladder                                          7.    Top Access Hatch

3.    Ladder Safety Cage                                    8.    Side Access Hatch

4.    Handrailing                                                 9.    Divider

5.    Handrailing Kick Plate

With regard to addressing Health and Safety Issues related to accessing a tank top at height and confined space working to conduct normal tank installation, inspection and maintenance duties, each tank or tank compartment is to have the following recommended components:

  • One Internal Ladder per compartment on tanks 1.5m deep or greater.
  • External Ladder where top of tank is 1.5m or greater from finished floor level to BS 4211:2005.
  • Ladder Safety Cage to be included where top of tank is 2m or greater from finished floor level to BS 4211:2005.
  • Handrail Cage enclosing all access points to tank roof where tank top is 2m or greater from finished floor level to BS4211:2005.
  • Lockable Man Access Hatches of minimum size 600mm sq. or dia. On tanks of 1000L capacity or greater.
  • Side Access hatches to be installed where practical on each tank / compartment of 1000L capacity or greater situated at the lowest level.
  • In twin compartment tanks no storage of Wholesome Water adjacent to Non Wholesome Water.
Note: The above information is advisory only.
Author:    Ian McCrone     BSc.     CEng.     M I Mech E
Past Chairman of ATCM
Copyright ATCM
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