Download - Concrete Mattresses Flysheet
Subsea Protection Systems Contact: +44 (0)1493 600700
Subsea protection:
Concrete Mattresses
world, for all of the major subsea construction companies. We carry a large number of
standard mattresses in stock, and can also
requirements. Quality and safety are
strive to provide the best products to ensure safe and efficient outcomes for cl
in offshore environments.
Applications
• Protection from dropped objects
• Added weight and stabilization
• Protection from fishing trawl
• Scour prevention;
• Support for pipeline and cable crossings;
• Supports or foundations for other
• River bank erosion control.
seabed to effect and increase in stability and overtrawlability.
Subsea Protection Systems Datasheet 700 - [email protected]
Subsea protection:
Concrete Mattresses
Concrete mattresses provide a recognised
cost-effective engineering solution to
subsea assets. They have been used for over two
decades in protecting subsea pipeline
against impact, dropped objects and scour.
Installation of mattresses is a straightforward and
safe procedure with the appropriate equipment,
using either divers or ROVs.
SPS is one of the world’s leading manufacturers of
concrete mattresses. We manufacture a
range of mattresses, in the UK and around the
world, for all of the major subsea construction companies. We carry a large number of
standard mattresses in stock, and can also design and manufacture mattresses to specific
afety are central to the way SPS works, and we continually
strive to provide the best products to ensure safe and efficient outcomes for cl
Protection from dropped objects;
Added weight and stabilization;
trawler impact;
for pipeline and cable crossings;
Supports or foundations for other Subsea activities; and
River bank erosion control.
The flexi-mat is a standard SPS product. It
provides a high degree of flexibility,
and longitudinal, allowing it to closely follow
the contours of a pipeline / umbilical and
seabed. It is constructed using high strength
concrete profiled blocks and U.V. Stabilised
polypropylene rope. The SPS f
pattern reduces the open line effect thus
offering additional protection and stability.
Once installed the flexi-mat may scour into the
seabed to effect and increase in stability and overtrawlability.
attresses provide a recognised and
engineering solution to protecting
subsea assets. They have been used for over two
subsea pipelines and cables
against impact, dropped objects and scour.
Installation of mattresses is a straightforward and
safe procedure with the appropriate equipment,
is one of the world’s leading manufacturers of
manufacture a wide
in the UK and around the
world, for all of the major subsea construction companies. We carry a large number of
design and manufacture mattresses to specific
central to the way SPS works, and we continually
strive to provide the best products to ensure safe and efficient outcomes for clients working
mat is a standard SPS product. It
provides a high degree of flexibility, both lateral
allowing it to closely follow
the contours of a pipeline / umbilical and
nstructed using high strength
concrete profiled blocks and U.V. Stabilised
SPS flexi-mat matrix
reduces the open line effect thus
offering additional protection and stability.
mat may scour into the
Subsea Protection Systems Contact: +44 (0)1493 600 700
Standard dimensions and configuration
Concrete mattresses can be manufactured to a range of sizes and densities to suit the
particular application. Table 1 sets
carry in stock for immediate delivery. Other sizes, densities and configurations can be
supplied to order.
Mattress size
Length Width Height
6.00 3.00 0.15
6.00 3.00 0.15
6.00 3.00 0.30
6.00 3.00 0.30
Tapered (Wedged) flexi-mats
Extreme seabed, current and wave conditions may determine that additional stability is
required beyond that provided by the standard flexi
mats with enlarged tapered (wedged) edge elements. This tapered (wedged) element also
offers an improved overtrawlability profile.
extreme environmental loadings, buoyancy forces, or lo
Pipelines may require additional weight beyond that provided by the fleximat.
SPS Logmats are construted using high strength, reinforced concrete logs and U.V. stabilised
polypropylene rope. Logmats can be quickly and accurately
lifting equipment. Logmat lengths are supplied to meet a client’s individual requirement.
Subsea Protection Systems Product Flysheet : +44 (0)1493 600 700; [email protected]
Standard dimensions and configuration
Concrete mattresses can be manufactured to a range of sizes and densities to suit the
particular application. Table 1 sets out the standard sizes of SPS Flexi-mat, which SPS will
carry in stock for immediate delivery. Other sizes, densities and configurations can be
Mattress type
Height Density
0.15 SG 2,400 kg / m3 Standard Flexi-
0.15 SG 2,400 kg / m3 Tapered (Wedged)
Fleximat on long edges
0 SG 2,400 kg / m3 Standard Fleximat
0 SG 2,400 kg / m3 Tapered (Wedged)
Fleximat on long edges
mats
seabed, current and wave conditions may determine that additional stability is
required beyond that provided by the standard flexi-mat. In this case SPS can provide flexi
mats with enlarged tapered (wedged) edge elements. This tapered (wedged) element also
offers an improved overtrawlability profile.
Logmats
The Logmat is a standard SPS product, and
is flexible in only one plane. This provides an
engineering solution to t
challenges:
(1) Load bearing -
conditions exist a logmat may provide a
foundation base for supporting a pipeline or
other subsea construction
(2) Stabilisation -
extreme environmental loadings, buoyancy forces, or loss of weight coat, Subsea
Pipelines may require additional weight beyond that provided by the fleximat.
Logmats are construted using high strength, reinforced concrete logs and U.V. stabilised
polypropylene rope. Logmats can be quickly and accurately deployed using
fting equipment. Logmat lengths are supplied to meet a client’s individual requirement.
Concrete mattresses can be manufactured to a range of sizes and densities to suit the
mat, which SPS will
carry in stock for immediate delivery. Other sizes, densities and configurations can be
-mat
Tapered (Wedged)
Fleximat on long edges
Standard Fleximat
Tapered (Wedged)
Fleximat on long edges
seabed, current and wave conditions may determine that additional stability is
mat. In this case SPS can provide flexi-
mats with enlarged tapered (wedged) edge elements. This tapered (wedged) element also
The Logmat is a standard SPS product, and
is flexible in only one plane. This provides an
on to two particular
where soft soil
conditions exist a logmat may provide a
foundation base for supporting a pipeline or
other subsea construction;
In conditions of
ss of weight coat, Subsea
Pipelines may require additional weight beyond that provided by the fleximat.
Logmats are construted using high strength, reinforced concrete logs and U.V. stabilised
deployed using standard SPS
fting equipment. Logmat lengths are supplied to meet a client’s individual requirement.
Subsea Protection Systems Product Flysheet Contact: +44 (0)1493 600 700; [email protected]
Higher/lower Density Mattresses
The density of concrete used in the manufacture of standard mattresses is generally
between 2.3 and 2.5 tonnes per cubic metre. Under certain conditions where there may be
a requirement for additional or less weight in a mattress (or other SPS product). SPS can
design and supply a concrete mix with a higher or lower density than the standard.
Protection Pads
Under certain operating conditions
when a low-friction or anti-abrasion
material between the concrete
mattress and the asset that it may
be stabilising or protecting. SPS can
provide this by affixing a range of
materials to its Mattress Segments.
Fronded Concrete Mattresses
Fronded concrete mattresses are used to prevent seabed scour. Natural seaweed reduces
water velocity locally and correspondingly reduces scour; the frond mattress replicates this
natural phenomenon. Over 1000 buoyant fronds per square metre at nominally one metre
high are built into the mattress and properly deployed they will stop scour rapidly by
forming a sand berm from particulate matter in the sea
• Industry-standard products for subsea construction
• Cost-effective and reliable
• Easy and safe installation
• Available in a range of sizes and configurations
