DNVGL-ST-0358
Certification of offshore gangways for personnel transfer
| Organization: | DNVGL |
| Publication Date: | 1 December 2015 |
| Status: | inactive |
| Page Count: | 61 |
scope:
General
This standard for certification describes the procedures and requirements for obtaining certificates for offshore gangways.
The following topics are covered:
- design approval
- materials
- welding
- production
- testing.
Requirements for operational procedures and training as required for type 3 gangways (see [1.4.3]), are not part of the scope.
Passive and active systems
The scope of this standard covers both passively and actively motion compensated gangways.
- The design of passive motion compensated gangways incorporates features that allow the gangway to accommodate the relative motions between vessels without making use of any external systems or equipment.
- Active motion compensation implies a system powered by an external power supply that reduces or cancels (compensates) the effect of the vessel motions (from one degree of freedom to all 6 degrees of freedom) on the gangway structure.
Types of gangways
The standard covers the following types as related to the operation of the gangway:
Type 1 - Uncontrolled flow of people, routine personnel transfer
- people move freely between the connected units
- connection time: indefinite
- gangway is supported in X, Y and Z axis directions at both ends
- gangway shall not be permanently connected to at least one of the units
- gangway shall contain means to self-detach at one end and move away in a safe manner and short time.
Type 2 - Controlled flow of people, routine personnel transfer.
- People do not move freely between the connected units; the
flow of people is controlled/regulated
- Connection time: usually less than 24 hours; the control of the flow of people shall be ensured throughout the entire connection time.
- At least one end of the gangway is supported in the X, Y and Z axis directions
- Gangway shall contain means to self-detach at one end and move away in a safe manner and short time.
Type 3 - Controlled flow of people, engineered personnel transfer.
- Gangways of more simplistic design to be used only in "Marine Operation" type personnel transfers.
Document History
