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Rope Types and Characteristics

Rope Types and Characteristics. Serim PAKER 2004, İzmir. Rope Types and Characteristics. Why do we use ropes ? We use ropes to keep a ship in position or To hold two material together. Rope Types and Characteristics. Rope construction

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Rope Types and Characteristics

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  1. Rope Types and Characteristics Serim PAKER 2004, İzmir

  2. Rope Types and Characteristics Why do we use ropes ? • We use ropes to keep a ship in position or • To hold two material together

  3. Rope Types and Characteristics Ropeconstruction • There are many types of rope construction. A rope's construction determines its operating characteristics and cost. Rope construction topics include the material the rope is made of as well as how the material is manufactured into rope.

  4. Rope Types and Characteristics Natural Fibre Ropes Synthetic Fibre Ropes Steel Wire Rope

  5. Rope Types and Characteristics Fibre Rope ? • The process of manufacture entails combing selected fibre into long ribbons known as sliver, which are later twisted up into yarns. These yarns are then twisted into strands, three or four of the latter being finally laid up into the finished rope.

  6. Rope Types and Characteristics Fibre Rope • Laid Rope; Natural and Synthetic Fibers are often twisted into yarns, the yarns into strands, and then the strands twisted into ropes in such a way that the twists are equalized so that the rope is stable but flexible. This is called "laying."

  7. Rope Types and Characteristics Fibre Rope

  8. Rope Types and Characteristics Fibre Rope • Standart Lay • Soft or Long Lay • Hard, Firm, or Short Lay

  9. Rope Types and Characteristics Fibre Rope • Hard-fibre Ropes • Manila • Sisal • Coir

  10. Rope Types and Characteristics Fibre Rope • Soft-fibre Ropes • Hemp • Jute • Flax • Cotton

  11. Rope Types and Characteristics Natural Fibre Ropes • Manilla (Manila) • Sisal (Sizal or Sisal) • Hemp ( Kendir ) • Coir ( Hintkeneviri ) • Cotton ( Pamuk ) • Flax ( Keten )

  12. Rope Types and Characteristics Synthetic-fibre Ropes • Polypropylene • Polythene • Nylon and Terylene

  13. Rope Types and CharacteristicsNatural Fibre Ropes Manilla • is obtained from the abaca • exports especially Philippine Islands • more pliable and soft • is very expensive • it swells when wet • but it is the strongest natural rope

  14. Rope Types and CharacteristicsNatural Fibre Ropes Sisal • is obtained from the Agave Sisalana • comes largerly Russia, America, East Africa, Italy, etc. • needs a tropical climate • costs of production better suit than manilla • When wet, it swells up more than manilla, as the water absorbed more quickly, and it becomes slippery to handle

  15. Rope Types and CharacteristicsNatural Fibre Ropes Coir • is obtained from the fibres os coconut husks. • comes mainly from Sri Lanka and ports of India • very rough, coarse and hairy rope • Very light and floats, possessing great elasticity • isn’t popular for the seafarers.

  16. Rope Types and CharacteristicsNatural Fibre Ropes Hemp • is obtained from the stem of the plant Cannabis Sativa (Canvas or Cannabis = Hemp) • New Zealand, Russia, China, India, USA, etc… • The advantage of hemp rope is that it is impervious to water and does not shrink or swell when wet. • Sailing vessel…

  17. Rope Types and CharacteristicsSynthetic-fibre Ropes Polypropylene • most popular of the man-made fibres at sea • cheap, light to handle, • same strenght whether wet or dry, and float • used for mooring ropes • permanently damaged and weakened • affects acids, alkalis, and oils • fibrefilm, a by-product from polypropylene, is a very cheap version of the fibre

  18. Rope Types and CharacteristicsSynthetic-fibre Ropes Polythene • It’s strenght lies midway between manilla and nylon • It absorbs only 0.01 % water • It’s unaffected by most industrial chemicals and microorganisms. • It’s used mooring tails and mooring ropes • It’s disadvantages are very similar to nylon’s

  19. Rope Types and CharacteristicsSynthetic-fibre Ropes Nylon and Terylene • is the strongest of all the man-made fibre ropes • good elasticity, stretching up to 30 per cent and returning to its original lenght • used for such functions as shock-absorbing required • Light to handle, • do not float and in cold climates they tend to stiffen up and become difficult to handle.

  20. 3 Strand Matt Polyester 3 Strand Polyester Some nylone and polypropilene ropes 3 Strand Matt Polyester White 3 Strand Multifilament Polypropylene

  21. Super Nylon Braidline 3 Strand Monofilament Polypropylene Some nylone and polypropilene ropes 3 Strand Nylon 8 strand nylon

  22. Rope Types and Characteristics Characteristics of Ropes We need a some characteristic specifications about the ropes: • Breaking off force • Ex.: • Force of breaking; • Manila KK=2Ç2 : Polythene KK= 3Ç2/300 • Terilene KK=4Ç2/300

  23. Rope Types and Characteristics Characteristics of Ropes We need a some characteristic specifications about the ropes: • Breaking off force • Stretching • Shock-absorved • Breaking off effect effects • Friction specification • Float

  24. Steel Wire Rope

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