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Helping to Protect National Assets, Transport Infrastructure and Public Places
rhinodoors.com
We provide free advice, site surveys and a comprehensive after-sales service, with 24-hour emergency call-out and planned maintenance contracts, backed by extended warranties.
Our doors are installed and maintained by Health & Safety trained and security cleared staff
operating from fully equipped vans.
We are experts in the design and manufacture of door control systems.
We are a NIC EIC Approved contractor.
National Inspection Council forElectrical Installation Contracting
APPROVED CONTRACTOR
OffshoreBlast-Resistant Walls
& Escape Tunnels
Rhino Doors (North)
Martland MillMart LaneBurscoughLancashireL40 0SD
T: +44 (0)1704 898584
Rhino Doors
Rhino DoorsMaritime Road,
Llewellyns Quay,Port Talbot,SA13 1RF
Tel: +44 1639 888119
THE STRENGTH TO PROTECT
THE STRENGTH TO PROTECT
RHINO SYSTEMS LTD PATENTED ARCH PROFILE CORRUGATED BLASTWALLS FOR OFFSHORE
Services Zone
Bottom Reaction level
Top Reaction level
Vertical reaction
Support cantilever beam
External access route
Bottom level of MSF
Internal escaperoute
Blast
Blast
Blast
Blast
TOS Main deck
No Blast
RHINO SYSTEMS LTD OFFSHORE ESCAPE TUNNELS
Applications:
• Offshore wall Panels• Cross – deck walls on
FPSO’s and FLNG• Escape tunnels• A, H & J rated
Design basis, standards and verification:
• ISO 19903• Fabig Technical Note 5 (stainless
steel blastwalls) applies also for carbon steel (referenced in ISO 19903)
• Eurocode 3• SDOF and code check and added
dynamic explicit NLFEA (LSDYNA or ABAQUS)
• Design verification by classification society LR, DnV, ABS
Buckling modes with trapezoidal profile that are avoided or postponed with arch profile:
Overall bending
Web
Out of plane buckling and crushing collapse
Trough
Harsh environment FPSO
Cross Section
Fixed platform tunnel support and fire-expansion joint system
Design Standards and verificationFeatures
• FABIG technical Notes 4, 5 , 6 & 13• Eurocode 3• SDOF and code check and added
dynamic explicit NLFEA (LSDYNA or ABAQUS)
• Design verification by classification society LR, DnV, ABS
• Double carcass construction with ceramic fibre insulation between the two. • Light weight duplex stainless steel outer carcass has with arch profile walls and stiffened
plate roof and bottom.• RHS ring frames at supports.• Inner truss for carcass support when H/J rated fire softens outer carcass.• Strong support bearing system to cater for uneven blast and fire loads.• Expansion joints every 20-35m• Strong through draft of exhaust air from accommodation keeps interior cool.
rhinodoors.com
With arch profile:– compression panel width is halved– web has lower Sw / t ratio– out of plane pressure resistance
increased
Chevron stiffner moves neutral axis up, reducing compressed width of web and stiffening it
Neutral axis
Compression side
Trapezoidal profile Key to support types: B = Bearing, BR = Bearing with vertical release, F = Fin plate
Connection to compliant wall
BB BF B B
BFBR BR BR BR
Flexible seals
6000800080008000 7000 7500 10000 12000 13500
T250 T300 T500 T600 T700 T750 T800
Fire performance comparison of bulkhead and non-load bearing prefabricated blastwalls(Ref : Advances in the use of high strength carbon and stainless steels offshore, Fabig TM80 2014)
Reproduced by permission of the Fire and Blast Information Group - www.fabig.com
200m long Escape Tunnel. 2–3 bar resistance on inboard side. Intermediate air lock entrances
Increasing capacity for ductility ratio Ym/Yel from 1 to 3 substantially reduces required wall quasistatic strength, weight and support reactions
00.1 0.25 0.5 1.0
td / T
zone of interest for offshore blastwalls
1.5 2.0 3.0 5.0 100.75
0.8
0.4
1.2
DLF
0.2
1.0
0.6
1.4
1.6
0.5 td
P MAX
0 td
Elasti
c res
ponc
e1.25
1.50
2.0
3.05.0
10.0
YmYe1
=
Escape tunnel for fixed platform for cantilever-over drilling
Strength retention (strength at 2% strain)
Temperature ºC
Stre
ngth
at 2
% s
trai
n re
tent
ion
fact
or0
0.00
0.40
0.80
1.20
0.20
0.60
1.00
1.40
200
316
k2% = f2% (T) / f0.2%p
2205
2304
Carbon steel
600 1000400 800 1200
Zone of interest for load bearing bulkhead walls 500-700C, generally needs PFP
Zone of interest for non-load bearing corrugated blastwalls 800-1100C, hence PFP generally not required
Features
• Used for blast 0.5 to 4 bar (7 to 60psi), spans up to 14m (45ft)• Fire resistant• Carbon steel S355 or duplex stainless steel • Widely used offshore UK, Norway, Azerbaijan, SE Asia and Australia• Ductile bending capacity to ductility ratio 3 or more thinner, lighter
weight wall allows economic use of duplex stainless steel• Bi-directional option offered• Compliant supports with controlled moment carry over to deck
simplifies deck design • Corrugated blastwalls typically have half the depth of bulkhead walls
(space saving) and are lighter
