SAS LCT Brochure

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A digital version of the brochure: SPREAD MOORING EQUIPMENT

Text of SAS LCT Brochure

  • W I N C H E S

    Underwater Fairleads

    Chain Tensioners

    SPREAD MOORING EQUIPMENT

  • Chain Tensioner CharacteristicsThe SAS double, inverted cylinder PUSH style,

    reciprocating, vertical acting Linear Chain Tensioner

    (LCT) is a fixed style, intended for applications where

    one permanent tensioner per mooring leg is required.

    The integral primary chain stopper is designed to

    withstand the full Minimum Breaking Load of the chain

    without damage.

    The primary chain stopper arrangement supports and

    aligns the tensioning cylinders and is intended for a

    bolted connection to a customer designed and supplied

    foundation. All tensioners will be supplied with full product

    certification by Classification societies such as DNV or ABS.

    Tensioners will carry Design Review Approval and FAT Witness

    Certificates from the designated Classification Society.

    BenefitsThe SAS Linear Chain Tensioner technology has evolved

    from 45 years of experience and know-how in the design

    and manufacture of offshore pipe-lay tensioners com-

    bined with more recent experience and familiarity in the

    field of Spread Mooring Equipment for Offshore Produc-

    tion Platforms. In addition to our already comprehensive

    product line has been designed from the ground up by first

    applying innovative design to improve existing technology,

    materials and manufacturing methods then seeking and

    implementing customer input to optimize installation and

    operation based on field experiences.

    The philosophy behind our approach is to offer a product that:

    Is user friendly with functional simplicity and long-term

    reliability

    Does not require additional below deck support structure

    Requires low maintenance with minimal set-up

    Does not incorporate complex and sensitive operating

    technologies

    Minimizes investment and operational costs

    Modular ConceptIn order to minimize front-end engineering and optimize

    delivery lead time, SAS Linear Chain Tensioners are offered

    in 9 standard modules each based on a chain size range.

    These standard modules are outlined in tabular form overleaf

    and cover mooring chain sizes between 100 and 180mm.

    Of course models covering chain sizes above and below this

    standard range are also available.

    Product ConfigurationsAlthough SAS has opted for the simpler and more straight-

    forward PUSH style of tensioner for our base product

    range, other styles and configurations are available:

    Deck penetrating PULL vertical style where low

    overhead clearance is available

    Movable vertical tensioner with integral primary stopper

    Movable vertical tensioner with integral secondary

    stopper separate primary stopper

    Fixed horizontal tensioner / stopper combination

    Movable horizontal tensioner with separate primary

    stopper

    Additional ProductsIn addition to our Linear Chain Tensioner line, SAS offers

    a comprehensive range of mooring and installation

    equipment:

    Riser Pull-In and Mooring Line Installation Rotary Drum

    and Traction Winches

    Installation and Line Tensioning Chain Winches

    Vertical and Horizontal Windlasses

    Underwater Chain Fairleads and Wire Rope Sheaves

    Overboarding Chutes and Chain Guides

    Underwater Combination Swivel Fairlead Primary Chain

    Stopper (under development)

    ApplicationsSAS equipment can be configured to suit the particular

    requirements of the full spectrum of offshore production

    vessels and platforms:

    Mono-Hull FPU and FPSO

    Ship-Shape FPU and FPSO

    Standard and Deep Draught Semi-Submersible FPU

    Seagoing Platform (SPAR) type FPU

    Classic, Truss or Cell Type SPAR

    Standard Features Rugged Modular Construction

    Load Path Custom Designed to Suit Deck Structure

    Non-Corrosive Stainless Steel Primary Stopper

    Load Pin Replacement under Full Line Tension

    Ratchet Style Self-Closing Pawl Action

    Control Features PLC based with Local (Station) Control Console

    Self Synchronizing Hydraulic Tensioning Cylinders

    Fully Sealed Zone Rated HPU and LCT Control Console

    Multi-Mode Operator Selectable Control Functions

    Continuous Load Monitoring

    Reliable Spread Mooring Systems

    Linear Chain Tensioners

  • Push Type LCT range

    www.saswinches.nl

    Chain

    diameter

    mm.

    Pre

    tension

    kN

    Stall

    tension

    kN

    Speed

    in/out

    m/min

    MBLPrimarystopper

    Based on Chain R4S

    kN

    Hydraulic PressureWorking condition

    Hydr.eff. 0,85Stall condition

    HydraulicFlow

    Based on real stroke

    liters (gal.)

    Dimensions

    in meter

    Weight

    in

    ton H W Df

    LCT-PH0007

    100102105107

    2167224523632442

    2600269328352931

    2,002,002,002,00

    12335

    176 (2552)182 (2643)192 (2782)198 (2876)

    207 (3002)214 (3110)226 (3273)233 (3384)

    248 (3603)257 (3732)271 (3928)280 (4061)

    248 (3603)257 (3732)271 (3928)280 (4061)

    50,593 (13,366)51,422 (13,585)52,874 (13,968)53,91 (14,242)

    LCT-PH1117

    111114117

    260427282854

    312532743425

    1,751,751,75

    14415211 (3067)222 (3213)232 (3361)

    249 (3609)261 (3780)273 (3955)

    254 (3681)266 (3856)278 (4034)

    299 (4330)313 (4537)327 (4746)

    55,984 (14,79)57,435 (15,173)58,887 (15,557)

    Contact SAS

    Contact SAS

    Contact SAS

    Contact SAS

    Contact SAS

    Contact SAS

    2.95

    3.10

    3.50

    3.60

    4.05

    4.25

    10

    13

    16

    19

    23

    28

    2.00

    2.15

    2.35

    2.50

    2.72

    2.94

    1.15

    1.25

    1.37

    1.46

    1.59

    1.70

    LCT-PH3037

    130132137

    341835073733

    410142094479

    1,501,501,50

    18852212 (3082)218 (3162)232 (3366)

    250 (3626)257 (3720)273 (3960)

    255 (3698)262 (3795)278 (4039)

    300 (4351)308 (4465)328 (4752)

    86,866 (22,948)88,24 (23,311)91,539 (24,182)

    LCT-PH7175

    171172175

    533653795530

    640464556636

    1,001,001,00

    27930212 (3080)214 (3104)220 (3191)

    250 (3623)252 (3652)259 (3755)

    255 (3696)257 (3725)264 (3830)

    300 (4348)302 (4383)311 (4505)

    181,875 (48,047)182,752 (48,278)186,258 (49,204)

    LCT-PH7780

    177178180

    562756765773

    675368116927

    1,001,001,00

    29155224 (3247)226 (3275)230 (3331)

    263 (3820)266 (3853)270 (3919)

    269 (3897)271 (3930)276 (3998)

    316 (4585)319 (4624)324 (4703)

    188,449 (49,783)189,325 (50,015)191,517 (50,594)

    LCT-PH4247

    142147

    39624193

    47545032

    1,501,50 21179

    195 (2822)206 (2988)

    229 (3321)242 (3515)

    234 (3387)247 (3585)

    275 (3985)291 (4218)

    121,392 (32,069)125,614 (33,184)

    LCT-PH5257

    152157

    44284665

    53135598

    1,501,50 23559

    218 (3155)229 (3323)

    256 (3711)270 (3910)

    261 (3786)275 (3988)

    307 (4454)323 (4692)

    129,836 (34,299)134,059 (35,415)

    LCT-PH2027

    120122124127

    2982306831543285

    3578368137853942

    1,501,501,501,50

    16592

    185 (2689)191 (2766)196 (2844)204 (2962)

    218 (3163)224 (3254)231 (3346)240 (3485)

    222 (3226)229 (3319)235 (3413)245 (3555)

    262 (3796)269 (3905)277 (4015)288 (4182)

    80,268 (21,205)81,368 (21,495)82,742 (21,859)84,666 (22,367)

    LCT-PH6268

    162165167168

    4903504751435192

    5884605761726230

    1,251,251,25 1,25

    26221

    195 (2830)201 (29113)205 (2968)207 (2996)

    230 (3329)236 (3427)241 (3492)243 (3525)

    234 (3396)241 (3495)246 (3562)248 (3595)

    275 (3995)284 (4112)289 (4190)292 (4230)

    172,672 (45,615)175,74 (46,426)177,493 (46,889)178,807 (47,236)

    Cylinder port

    Cylinder port

    bar (psi) bar (psi) bar (psi)

    System incl. hydr. eff.

    System incl.

    hydr. eff.

    SAS

    Model

    ref. bar (psi)

    Fixed LCT

    W WDf Dm

    Movable LCT

  • Chain Tensioner Unique Design Features

    -E- The structurally stiff, high tensile steel casting crosshead is operated by two

    mechanically synchronized hydraulic cylinders

    such that no complex, sophisticated,

    electronic motion control equipment is

    required. This renders the SAS system user

    friendly, offers ease of operation and

    simplified set-up and maintenance.

    -F- The custom designed, marine quality hydraulic cylinders are rigidly flange and spigot mounted to

    the stopper frame. The rod ends are

    fitted with a shrink fit insert bushing that has a tight

    location fit in the traveling crosshead. There are

    no stressed threaded connections or

    compliant joints that present possible

    failure points or require maintenance.

    -G- The primary stopper pawls and their base inserts are precision machined from

    high tensile stainless steel castings to

    prevent corrosion over the life of the

    equipment. As the pawls lay flat at 90

    to the chain center line a very stable

    foundation is provided with the

    induced mooring loads transferred

    from the critical chain link through

    the stopper and insert over a

    wide flat surface.

    -A- Tensioning of the chain is performed using a traveling crosshead fitted with two horizontally

    opposed ratchet type pawls engaging the lower

    radius of the chain link. Each pawl is offset

    from