concrete mattresses flysheet

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  • 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 - sps@sps.gb.com

    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 worlds 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 worlds 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 clients individual requirement.

    Subsea Protection Systems Product Flysheet : +44 (0)1493 600 700; sps@sps.gb.com

    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 clients 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 clients individual requirement.

  • Subsea Protection Systems Product Flysheet Contact: +44 (0)1493 600 700; sps@sps.gb.com

    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

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