Part  B  -  Verifications  and  approval  requirements

33

Corrosion  protection  is  an  important  factor  in  obtaining  approval,  in  particularly  the  following
aspects:
•  The  technical  aspect  of  corrosion  protection  that  ensures  that  the  verified  stability  and  integrity ­
  of  the  structure  remain  intact  for  the  expected  technical  life  cycle  of  the  structure
•  The  implementation  of  the  safeguards  shall  be  carried  out  with  the  lowest  possible  emissions ­
  so  as  to  be  accordingly  environmentally-friendly  and  nature-compatible  in  order  to  protect ­
  the  marine  environment
Both  the  above  are  subject  to  tests  and  inspection  by  the  authorities.
The  various  different  strategies  deployed  by  the  builders  of  the  structure  with  respect  to  corrosion ­
  protection  shall  be  differentiated  on  the  one  hand  according  to  the  location  (atmosphere, ­
  spray,  water  changes,  underwater  conditions)  and,  on  the  other  hand,  according  to
material  characteristics,  including  the  type  of  processing  involved.
Possible  strategies  include,  for  example:
•  Simple  coating
•  Coating  in  combination  with  a  cathodic  corrosion  protection  system  (CCP)
•  Impressed-current  systems  and/or
•  Corrosion  allowance,  mostly  in  combination  with  the  three  processes  described  above.
In  this  connection,  approvals  based  on  corrosion  protection  systems  (also  on  a  combination
of  different  systems),  corrosion  zones  and  suitability  tests  can  be  derived  from  the  BAW  lists
detailed  in  chapter  B2.3.1.  The  BAW  lists  are  of  a  recommendatory  nature.  What  is  decisive  is
that  the  technical  codes  of  practice  are  accordingly  fulfilled.
With  respect  to  the  local  areas  of  application,  one  must  differentiate  between  the  application
of  the  respective  corrosion  protection  system  to  the  parts  of  the  installation  which  are  located
above  the  water  line,  those  in  the  water  exchange  zone  and  those  which  are  under  water.
When  analysing  materiality,  as  much  attention  to  the  chemical  product  shall  be  paid  as  to  the
treatment  and  processing  of  the  specific  components  of  the  offshore  structure.

2.1.1  Structural  behaviour  in  the  case  of  a  collision  of  a  ship  with  an  offshore  station
When  assessing  structural  behaviour  in  the  case  of  a  collision  of  a  ship  with  an  offshore  station, ­
  stability  is  of  particular  importance  as  both  the  safety  of  individuals  and  the  security  of
supply  must  be  upheld.
A  collision  analysis  shall  be  conducted  based  on  the  information  contained  in  Appendix  1.
This  shall  include  documentation  stating  which  concept  is  planned  with  respect  to  a  collision
of  a  ship  with  the  operational  structure  and  its  respective  support  structure.  The  following  topics, ­
  for  example,  shall  be  discussed:
•  The  structure  shall  not  fail  and  appropriate  hull-retaining  measures  shall  be  accordingly  documented. ­

At  the  same  time,  this  analysis  shall  illustrate  how  the  best  possible  hull-retaining  design  can
be  achieved.