NORSOK R-002
ANNEX F Portable Units
Svein Harald Hetland, MSc,
Teknisk Kravsetter og Faglig leder løfteutstyr
BP Norge AS
Målet med presentasjonen:
• Bli kjent med krav i NORSOK R-002 Annex F
• Forstå hva som er årsaken til de høye
sikkerhetsfaktorene som benyttes i offshore
løfteoperasjoner.
Crane
accidents
NORSOK R-002 Annex F
• NORSOK R-003 pt. 8.2 Festeanordning på
komponent som skal løfte egenvekt skal være
beskrevet i produsentens bruksanvisning eller
dokumentert på annen måte. (Gruppe F5.)
Det kreves ikke sertifisering av
sakkyndigvirksomhet (eller DNV)
av innfestningspunkter (løfteører på gruppe F5) .
Standardisering gir en lettere
hverdag for oss alle.
Group
Description
Table F.1 – Groups of portable units
Subject to
NORSOK R-003
or R-005
Annex H and E
F1
Offshore
containers
DNV CN 2.7-1
EN 12079
Portable unit with a maximum gross mass not exceeding
25 000 kg,
for repeated use in the transport of goods or equipment, handled in open
seas, to, from or between fixed and/or floating installations and ships.
Unit and
lifting set
F2
Offshore service
containers
Unit and
lifting set
DNV CN 2.7-2
Portable unit built and equipped for a special service task, mainly for
temporary installation, e.g. are laboratories, workshops, stores, power
plants, control stations.)
F3
Offshore
portable units
DNV CN 2.7-3
Portable unit or package with a primary structure frame and maximum
gross weight not exceeding 100 tonnes, for repeated or single use, as
defined in DNV Standard for Certification No. 2.7-3 clause 1.1.5 Type A
Unit and
lifting set
F4
Heavy lift units
and units for
subsea lifting
DNV RMO Lifting
GL Noble Denton
Heavy lift units are portable units with a maximum gross weight equal to
or exceeding 50 tonnes planned to be lifted as suspended load onshore
or offshore.
Units for subsea lifting are portable units intended for lifting through
wave zone and lowering in deep water to landing on seabed.
Lifting set
only
F5
Lifted objects
NORSOK R-002
Annex F
This group includes any loads not belonging to the other groups, which
are not in themselves lifting equipment, but fitted with attachment points
for lifting accessories for lifting onshore, internally on an offshore
installation or between installation and vessel. Lifted objects also
includes objects with detachable transport skid/cradle.
Lifting set
only
Examples of lifted objects may be
1.machines, components or equipment with fixed or detachable dedicated lifting
points,
2.modules or structures with lifting point for intended for lifting during installation,
maintenance and decommissioning.
Typical unit weights from 2 tonnes to 50 tonnes but may be used for lifts up to 100
tonnes.
Annex F Protable Units
DNV CN 2.7-3
Risiko for fasthuking i fartøy
1. Permanent struktur eller utstyr som blir installert som en ny del,
flyttet/fjernet som del av modifikasjon eller fjerning
2. Objekter som ikke kan løftes i en lastbærer
3. Ofte usymmetriske løft
4. Hvis en transport krybbe er benyttet som support for utstyret, så kan denne
være boltet fast eller låst fast.
5. Løfteørene kan plasseres delvis på krybben eller på utstyret som blir løftet
1. Generelle krav er at toppløkken skal være lett tilgjengelig for anhukeren uten å
klatre på lasten. Maksimalt 1.3m fra dekk.
2. Store flyttbare enheter over 25t skal ha 2 separate topp-løkker som skal legges
ned på dekk 1.5m i fra slik at en slipper å løfte på tunge kroker og forløpere.
3. Bruk statisk bestemte løfte arrangement. Dvs. 2-3 stropper og flere enn 4 bør
unngås.
4. Arbeidsvinkelen fra vertikalen bør være mellom 15 grader og 45 grader. Hvis
den er mindre enn 15 grader skal hele lasten bli vurdert til å bli tatt av kun en
stropp alene.
5. Krok skal posisjoneres vertikalt over tyngdepunkt for å få et horisontalt stødig løft.
6. Relativt lik lengden på slings bør tilstrebes
7. Minimum diameter for wire skal være 13mm.
8. Minimum diameter for kjetting skal være 8mm.
WLLR-002 = W * WCF
WLL
W
WCF
= Inneholder egenvekt og usikkerhet i veiecelle eller vektestimat
= Vekten på løftet objekt (veiecelle eller estimat)
= Usikkerhetsfaktor “Weight contingency factor”
METHOD OF DETERMINING THE
WEIGHT
WCF
COMMENT
Weighing
1.03
Incl. weighing by platform crane with calibrated
loadcell within ±3% accuracy.
Detailed calculation, based on upto-date drawings
1.1
NOTE; possibility of significant weight
development during construction and
fabrication.
Detailed calculation, based on less
updated drawings/info
≥1.2
WCF to be assessed specifically.
A factor of 1.5 or more should be considered for
demolition lift.
(DAF)Dynamiske tilleggskrefter=
rykk og napp, eller lite elastisitet
DAF
Dynamisk faktor
Dynamic Amplification Factor
Shows typical DAF values for lifting between installations (fixed or floating)
and supply vessel, involving a typical offshore crane.
Feil tyngdepunkt, CoG
Centre of Gravity,
COG envelope factor WCOG
For objekter hvor CoG er kjent eller
objekter som er relativt symmetriske hvor en kan forutse CoG:
WCOG = 1.0
For komplekse strukturer med ukjent CoG:
WCOG = 1.1
SKL=Skew load factor
• SKL= 1.0 for en, to og tre løfteører
• SKL=1.25 for et firepunktsløft
DF=Design Faktor
:
DF
p = partial load factor
c = Consequence factor
= p · c
p
c
DF
(p · c)
Lifting points including attachments to object
Single critical elements supporting the lifting point
1.34
1.25
1.68
Lifting accessories (spreader bar, shackles, slings
etc)
1.34
1.25
1.68
Main elements which are supporting the lift point
1.34
1.10
1.48
Other structural elements of the lifted object
1.34
1.0
1.34
ELEMENT CATEGORY
Redundans og kritikalitet
Material resistance factor Rm
Check against Minimum Breaking Load (MBL):
•
•
•
•
Wire rope slings:
Chain slings:
Shackle and rings (incl master links)
Fibre slings
Rm = 2,0
Rm = 1,8
Rm = 1,8
Rm = 2,8
Check against yield strength for structural steel. Ref. NORSOK N-004:
•
Lifting lugs and structural parts
Rm = 1,15
•
Bolts and welds
Rm = 1,3
WIRE WS 6x36 IWRC
MBL=160 t

Rm
= 2,0
Forhold mellom flyt og bruddspenning
Materialfaktor for stål mot flyt:
• 1.15 for stål målt mot flyt
• 1,3 for sveis/bolt målt mot flyt.

Rm
= 1,15
Kjetting målt mot brudd:
• 1.3*1.2+x=1.56 + x=1,8
for kjetting
x=deformasjonsfaktor
Fiber stropper (Polypropylen, PP)
Rm = 2,8
Siging av plast og fiber
End termination factor e
Wire rope slings:
Ferrule secure termination EN 13411-3
Spliced terminations EN 13411-2
e = 0,9
e = 0,8
Chain slings EN 818-2
Fibre slings spliced termination EN 1492-4
Fibre, Soft/webbing slings EN 1492-1 and -2
e = 1,0
e = 0,9
e = 1,0
•
•
Sikkerhetsfaktor inneholder:
Load factors
Resistance
factor
DF = (p · n)
APPLICATION
TO FIND
W COG
SKL
DAF
1
Rm
p
n
e
X
X
X
1
e
Rm
= MBL
9%
20%
= 100%
Lifting accessories
Sling design
WLL
10%
MBL
WCOG
11%
X
SKL
12,5%
Rm
DAF
20%
X
X
DF
17%
X
”Sikkerhets”-faktor:
APPLICATION
TO FIND
W COG
SKL
DAF
p
1
p
n

Rm
e
Lifting accessories
Sling design
MBL
X
X
X
X
X
Shackle selection
MBL
X
X
X
X
X
Master link/
Forerunner
MBL
X
X
X
X
X
X
X
X
Check of structural capacity during lifting
Check of structure
capacity
Design Load
X
Padeye design
Design Load
X
Table 1: Factors relevant for lifting design
X
X
X
X
X
X
X
X
X
X
Sikkerhetsfaktor for wire, Portable Unit, F5, R-002 (10 tonn):
•
•
SF = WCoG * SKL* DAF * DF * e * Rm =
SF = 1.1 * 1.25 * 2 * 1.7 * 1.11 * 2 = 10
Løfteøre på portable unit F5 (10t)
•
•
SF = WCoG * SKL* DAF * DF * Rm =
SF = 1.1 * 1.25 * 2 * 1.7 * 1.15 = 5,4
SWL / WLL
(største tillatte
arb.last)
SWL
Arbeidsvinkel
30 grader
Sikkerhetsfaktor
4.5
WLL
Arbeidsvinkel 45
grader
Sikkerhetsfaktor 4.0
Dokumentasjon og merking
F.1.1
Testing and documentation of lifting sets
Lifting sets shall be tested and accompanied by documentation in
accordance with Annex C as required for groups R1, R2 or R3 as
applicable.
F.7.4 Marking of lifting sling sets
Lifting sling sets shall be marked with the following information:
 Manufacturer’s identifying mark;
 Numbers and/or letters identifying the sling with the certificate
required by Annex C;
 The working load limit (according to this standard);
 Any legal marking (e.g. CE-marking where Machinery Directive
applies);
 “Offboard lift”
 Reference to a rigging design drawing with specified sling angles for
the lift
F.7.2.4.1 Lifting arrangement drawing
A lifting arrangement in this context consists of the lifted load and its
dedicated lifting set. A lifting arrangement drawing shall be prepared.
The following information (not limited to) shall be stated on the lifting
arrangement drawing:











net/gross weight of lifted object;
GA-drawing of the lifting arrangement, showing the geometry of the
load, including location of centre of gravity, and the sling assembly;
WLLR-002F5 for the complete lifting set. Note that this particular WLL
shall not include DAF. Thus it will express the maximum allowed
weight of lifted object;
WLL and MBL for each individual component of the lifting
arrangement;
working angles (angle between vertical and sling leg);
sling and shackle type specification;
material specification;
certificate requirements;
operational limitations;
sling lengths and fabrication tolerances;
Reference to applicable standards.
Offboard
WLL......tonnes
ID mark
CoG
Instruction for Lifting : (Acc. to NORSOK R-002 Annex F5
Type of lift:
- Inboard or onshore only: ……………………YES/NO
- Offshore lift, inboard and onshore lift: ..……YES/NO
Gross Mass of lifted object all inclusive:
WLL=W*WCF =……………………..………metric tonnes
Dynamic Amplifying Factor used:
DAF=…….
Pre-use check list:
Lifting set certification included: ……………… YES/NO
Lifting set and lifting attachments acceptable: YES/NO
Dropped object potential checked: …………… YES/NO
Acceptable protection included ……………… YES/NO
Entanglement risk (>1.5m distance to other load): YES/NO
NORSOK R-002 Annex F
PORTABLE UNITS
SPØRSMÅL