MARINE & OFFSHORE - 2 Pages

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MARINE & OFFSHORE

Catalog excerpts

Arboriculture Accessories Split Tails Enhances bending performance Reduces yarn on yarn abrasion and heat generation by a factor of 2 Applied at rope manufacture stage Diameter Colour Min Break Load (kN) Weight (g/m) Lengths Marlow Arborist Ropes are designed as a general purpose tree surgery rope. It is to be used in combination with ascending, descending and safety devices for work positioning only and not as a fall arrest system. It is designed for use in normal climatic conditions. Before undertaking and during a tree surgery operation, consideration should be given about how the action could be safely and efficiently carried out. In particular, care should be taken in selection of the anchor regarding it’s possible failure under load. When working on a tree limb where a fall or swing may be possible, the climber is required to use a supplementary anchor rope. Immediately before use, the user shall: • Make a visual inspection of the rope to ensure that it is in a serviceable condition and will operate correctly. • Ensure that the recommendations for use as advised in this sheet are followed. Performance The recommended terminations for any of the ropes covered in the table are either a Figure 8 Knot, or a Spliced Eye. The Gecko may also be sewn. All terminations should be carried out by a suitably qualified person. This rope may be used with any appropriate item that has a corresponding CE mark. If in doubt about compatibility, particularly diameter suitability, check with an instructor or a competent person before proceeding with the activity. This rope has been CE marked and therefore meets the criteria of MR 10-82 : 2005 and relevant parts of EN 1891 : 1998 as approved by the awarding body. Sewn Tree rigging, Work positioning Hardwearing, Strong Adjustable, CE Certified If the rope becomes soiled by mud or grit, wash in warm water of domestic supply (maximum 40° centigrade) and pure soap. Then immediately rinse and allow to dry in a warm environment away from direct heat. Maintenance You should inspect the whole length of this rope before each use to ensure its continued serviceability. Use visual and tactile inspection to identify cuts, tears, abrasion damage and powdering due to ageing, contact with heat, acids, alkalis and other corrosives. If any of these are present, discretion should be used and if in doubt, the rope should be withdrawn from service. Supplied on handy 50m mini spools, our 2mm Throwline has a smooth and hardwearing polyester cover giving it excellent handling characteristics and longevity. Storage Store in a dry, cool, well ventilated and dark place away from direct sunlight. Sources of ultra violet light, excessive heat, high humidity, sharp edges, corrosives or other sources of damage should be avoided. Ensure that no part of the rope is subjected to unnecessary stress or pressure. Obsolescence Diameter Colour Min Break Load (kN) Weight (g/m) Length Dyneema Throwline ArmourCoat GripCoat Specially formulated polyurethane coating Improves abrasion resistance and durability Increases friction, aids handling & splicing Provides colour coding (Black as standard, other colour options available on request) Placing ropes over sharp edges is extremely dangerous. No rope can be expected to perform to its rated strength and fall holding capacity when positioned in this type of situation. Specific care should be taken when using a chainsaw or handsaw with Arborist Rope as the rope has very little resistance to being cut by these tools. This rope conducts electricity, especially when damp or wet, if there is ever a risk of rope coming into contact with overhead cables, the advice of the appropriate local authority should be sought. This product should not be used during electrical storms where there is a risk of a lightening strike. Marlow Split Tails are made from our CE certified climbing rope and finished with strong sewn eye termination. Available in 2 lengths. Termination: Applications: Features: The following information is not exhaustive. Marlow Ropes Limited reserve the right to amend specifications according to them meeting CE Regulations. These products should be used only by trained and/or otherwise competent persons or the user should be under the direct supervision of such a person. The system used should incorporate a reliable anchorage point above the user, and any slack rope between the user and the reliable anchorage point should be avoided. It may become worn and damaged during normal use. Factors such as the following will reduce its safe working life: exposure to chemicals, temperatures greater than 40° Centigrade, prolonged exposure to ultra violet light, abrasion, high impact loads, contact with cutting tools or failure to maintain as recommended. In extreme circumstances the life of the product may be limited to one excursion. Everyday “wear and tear” during use can accelerate the deterioration of this rope. Extreme circumstances may severely limit the safe use of this rope. Professional users should be guided by their own industry practices or their own working procedures regarding obsolescence. If in doubt about a ropes’ condition, replace it immediately. A log should be kept to uniquely identify each rope and the hours of use it has had to help in making redundancy decisions. For easier handling and higher breaking strength, Dyneema Throwline is over 3 times as strong as our standard polyester product, but is 43% lighter. Supplied on 50m mini spools, Dyneema Throwline is light, strong and exceptionally hardwearing. Diameter Colour Min Break Load (kN) Weight (g/m) Length Transportation Under normal circumstances, no special packaging is required for transportation Markings The CE accreditation is awarded after meeting suitable technical standards such as those already described. The manufacturer meeting suitable Quality Assurance procedures such as in house testing and traceability is also a requirement. Ferrules - The ferrule on the end of each rope shows the following information: • • • • • the nominal diameter of the rope the number of the relevant standard the CE logo and the registration number of the approved body the manufacturing batch code the individual rope serial number • Improves flex fatigue experienced in continuous cyclic bending • Reduces yarn on yarn abrasion and heat generation by a factor of 5 • Applied at yarn manufacture stage – can be used in conjunction with any of the above coatings Synthetic Polymer Anionic Coating Prevents ingress of dirt and abrasive particles Provides “self healing” properties Increases coefficient of friction Significantly improves core/cover adhesion Dyneema is a registered Trade Mark of Royal DSM N.V. Made in the United Kingdom Tree surgery is potentially dangerous. The consequences of incorrect selection and use of equipment can result in damage, serious injury or death. Marlow Arborist Rope should be used only by trained and competent persons, or the user should be under the direct supervision of a trained and competent person. Robust and hardwearing, the Marlow throw bag is long lasting and ergonomically designed for ease of use. Available in 250g and 350g, in black only. Film & Theatre Rigging ca ifi pe gn ro si s ed er as off E b P pes M ro UH re of fib e ic ng et ra nth s a sy er ith off t w es en op m R ce low ns. pla ar io re M at pe d plic ro ts an ap g ire W enefi in b inch w Physical Properties Extension and Elasticity Synthetic fibre load-extension characteristics are non-linear and time dependent. These characteristics are important as they will determine rope behaviour. Over all extension is made up of several elements: Leisure Marine Industrial & Utility Our experienced Technical Team are able to help specify and design ropes and rope assemblies for specific projects and applications. Please contact technical@marlowropes.com or call +44 (0)1323 444444 for more information. A wide variety of factory finished rope terminations are available to suit strength and usage requirements. Technical Information Physical Properties Rope Termination and Assemblies Specific gravity (buoyancy of a rope / material) Specific gravity is a measure of the density of a material; a Specific Gravity of 1.0 is equivalent to a density of 1g per cm3 (i.e. a Specific Gravity <1 means the material floats). The following table shows the specific gravity of some of the materials commonly used in fibre ropes. Most Marlow ropes can be spliced, this is normally the preferred method of termination. A good splice using the recommended method should not reduce the strength of a rope by more than 10%. A knot will reduce the strength of the rope, sometimes very significantly. This loss is caused by the tight bends and compression found in any knot. The amount a rope will be weakened will depend on the knot, type of rope and the material from which it is made but can be up to 60% Ultra Violet Radiation Resistance Some ropes cannot be spliced and in these situations a sewn termination offers a considerably stronger option than a simple knot. However, for all ropes a sewn termination offers the consistency of a computer controlled process and easy inspection. However, a sewn termination will not normally be as strong as a good splice. Wherever possible the angle formed at the throat of a splice or sewn termination when it is loaded should be 30 degrees or less. This means that the length of the eye when flat must be at least 2.7 times the diameter of the object over which the eye is to be used and the distance from the bearing point to the throat when in use should be at least 2.4 times the diameter. All materials are affected by UV radiation to some extent. The following table attempts simply to rank different materials in line with their resistance to UV radiation Some materials like Aramids and HMPEs will require a larger eye with an angle at the throat of 15 degrees or less. The images below represent a small selection of the 100’s of different terminations and finishes available. Melting point The table below shows the typical melting or decomposition temperature of some common rope making materials. Material Polyester HMPE (Dyneema®) Nylon (UV treated) Aramids (Technora®, Nomex®, Kevlar®, Twaron®) Vectran® Polypropylene Zylon® Material Melting Point (Degrees C) Zylon® 650 (decomposition) Aramids (Technora®, Nomex®, Kevlar®, Twaron®) 500 (decomposition) Vectran® 330 Polyester 260 Nylon 6.6 250 Nylon 6 220 Polypropylene 170 150 HMPE (Dyneema®) Rope Strengths and Weights First loading Higher loads will experience a higher degree of bedding-in and increase the “stiffness” of the rope. This is often known as “Storm Stiffness” versus the normal loads of “Tidal Stiffness”. Multiple Continuous Loadings Rope strengths are tested according to Marlow’s QA25 and 26 quality procedures. Generally these procedures are in line with BS EN ISO 2307, however, a number of other internationally recognised test standards are used including EN 1891, EN 1892 and EN 564 Rope mass is determined be weighing a sample of rope whose length has been measured at a reference load. For most ropes this load is calculated as: Reference Load (kg) = D2/8 Where D is the rope nominal diameter (mm) Working Loads: Marlow Ropes specify a minimum breaking load (or sometimes an Average Breaking Load). It is the responsibility of the user to determine an appropriate factor of safety and safe working load. This factor of safety must be determined after considering all the risks, the strength reducing factors, and the expected life of the rope. The following table shows some of the factors that may affect the determination of the factor of safety. Rope strengths in this catalogue are given in Kilonewtons (kN).which is the correct measure of force or breaking strength. However most people are more familiar with kilograms (kg) so below are conversion factors from one to the other: kN to kg Kg to kN Dyneema is a registered Trade Mark of Royal DSM N.V. Extension due to “Bedding-In” will continue over subsequent multiple loadings until a “plateau” is reached. If the load is released, over time some of this further extension will be recovered. This is known as Visco-Elastic Extension. Ropes subjected to occasional high loads will be influenced by this element of extension. Material Specific Gravity Polypropylene 0.91 0.98 HMPE (Dyneema®) Fresh Water 1.0 Sea Water 1.03 Nylon 1.14 Polyester 1.38 1.41 Vectran® 1.44 Aramids (Technora®, Nomex®, Kevlar®, Twaron®) 1.54 Zylon® Steel 7.85 g, tin lif g, s, in al n ch n io in itio ruct , w ad st ng tr n lli es co pu ud ed cl id ble in ra b r ca so d fo e al an g d ned n te ig e ra is des Th th tw s . ct g bo du ggin in pro ri ble e al la ud er ai cl en av in d g es p pes an ro e s. ro y lines en n io tilit y pyl at U gu & t, pro plic ly rial en o ap st m d p ed du ce an vari In pla n ’s re lo y w e ny an m lo p ar ro r, r M ire este fo w oly able p it su Made in the United Kingdom Rope Length Permanent Extension Recoverable Extension Elastic Extension Total Extension Elastic Extension occurs with a “BeddedIn” or “Worked” rope and is immediately recoverable upon the release of the load. Elastic extension will dominate a rope’s behaviour in a continuously working / cycling environment. Creep is also permanent, non-recoverable extension and occurs at the yarn molecular level when the rope is under continuous load. Creep can have a significant impact on a rope’s behaviour in situations of continuous load. The graph (right) compares the load-extension characteristics of worked ropes but does not include permanent extension. Elongation of Worked Ropes Load Extension Characteristics s, . rig l a na it er io su m it to ca trad urs lo 3D l t gs, ore ui. a ri na co rd i o an r m ms me foti oto 2D sad urs st ca tr lo pe ith re cu w3D ro co nd mo m in ae f r tod te or s 2D es us r us pe cplie h fo ly i p po en wit rro edsu te pes rd li use yes b ro da sop or l up a® an s sf d po al p st n me l r be ro da so ee el lca a® w a myn asan but D lst can de s l ck ne we ut an asm la Dy te bb n® ems lidk ac nd Sys l ®a n ra y l b d ct st iso ra ry er e Ve enSy so ,ct ne ear ® at ar pes raVe ®, C s a d te e no d Ca p or an lloro ch s lr chn san A Te m g.Al Te em ing. h c stte in ech ys gg -te l S gg i-t lly Sy ri Hi oly t eri re tr Do D ea For further information on all Marlow products, including construction, physical properties, elongation characteristics and termination options, please see the relevent technical data sheets. Permanent extension is non-recoverable and will occur when a rope is first used. Individual fibre components of the rope will “Bed In” to their preferred position. ned ig g des in ly er al w ific lo ec gs, sp slin e ar l as pes wel ro as ur . O pes ro pes ro ssik re ru ltu d p cu an ori g rb bin f A im r o cl d ure ie ct rtif . ufa ce es an E ori m C K e ss U ud ce ly cl ac on d in d an e th an es is s w rist wlin lo o ar rb hro M rA ,T fo es lin Sussex BN2 arbo rist@ 7 3GU, marlow Unit ropes.c ed King dom om Marlow’s Cambium Saver helps prevent bark damage to trees and to reduce friction and wear on climbing ropes. Designed to be used with both spliced and sewn terminated climbing ropes. Ropema T : +44 ker Par ww w.m (0) 132 k, Diplock 3 arlowro 444 444 s Way pes.com F : +44 , Hail (0) 132sham, Eas 3 444 t 455 Cambium Saver Manufactured from 30mm wide, high tenacity polyester webbing with a circular steel ring one end and steel quick link the other end. Arborist Rope Abrasion and heat generation can often be the enemy of synthetic fibre ropes. To that end, Marlow have a range of options to protect single and double braided fibre ropes, reduce fatigue and extend life. These include: Width Length Minimum Break Load (kN) Unit Weight (g/m) Colour Nylon Polyester Ropemaker Park, Diplocks Way, Hailsham, East Sussex BN27 3GU, United Kingdom T : +44 (0) 1323 444444 F : +44 (0) 1323 444455 offshore@marlowropes.com www.marlowropes.com 10 Cordage Park Circle, Suite 239, Plymouth, MA 02360 United States T : +1 (339) 933 0963 salesusa@marlowropes.com ww

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