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37

02 - FIBRE ROPE

SAMSON WIRE REPLACEMENT OPTIONS

6x36 EIPS IWRC

GRADE 1960

Same Size

up 4–6mm*

Same Strength

Same Strength

Same Strength

AMSTEEL

®

-BLUE

SATURN-12

QUANTUM-12

QUANTUM-8

TURBO-75

Diameter (mm)

32mm

32mm

34mm

36mm

36mm

34mm

Weight per 100 m (kgs)

449kg

62.2kg

67.0kg

66.5kg

77.1kg

71.4kg

ISO 2307 Strength** (t)

77.9t

83.5t

93.0t

86.6t

83t

83.9t

Diameter (mm)

35mm

34mm

36mm

40mm

40mm

36mm

Weight per 100 m (kgs)

538kg

67.0kg

76.9kg

74.4kg

90.3kg

88.5kg

ISO 2307 Strength** (t)

93.2t

93.0t

103t

103t

99.8t

95.3t

Diameter (mm)

38mm

36mm

40mm

44mm

44mm

40mm

Weight per 100 m (kgs)

637kg

76.9kg

97.0kg

90.5kg

105kg

99.7kg

ISO 2307 Strength** (t)

110.5t

103t

128t

120t

115t

113t

Diameter (mm)

42mm

40mm

44mm

48mm

48mm

44mm

Weight per 100 m (kgs)

774kg

97.0kg

117kg

118kg

137kg

120kg

ISO 2307 Strength** (t)

134.3t

128t

152t

158t

146t

138t

Diameter (mm)

44.5mm

44mm

48mm

48mm

52mm

48mm

Weight per 100 m (kgs)

867kg

117kg

129kg

118kg

155kg

138kg

ISO 2307 Strength** (t)

150.4t

152t

173t

158t

163t

166t

*For optimal performance, mitigating abrasion over a chock, Samson recommends AmSteel

®

-Blue in up 4–6mm over the wire rope you are replacing.

**This standard replaces BS EN 919 and ISO 2307:1995 and is for unspliced strengths.

SAMSON LINE SELECTION

FACTORS TO CONSIDER

A number of factors should be considered

when selecting a Samson line, such as

>

intended use or application,

>

potential abrasion issues,

>

surface preparation,

>

rope design/construction,

>

chafe protection,

>

proper installation procedures,

>

inspection schedule, and

>

retirement criteria.

Samson works with you to ensure that there

is a comprehensive understanding of each

of these considerations to en-sure a long

service life and mitigate unnecessary failure.

UNDERSTANDING ABRASION

Abrasion is one of the biggest culprits of line destruction. There are two types of abrasion:

internal abrasion caused by the relative movement of internal and external yarns; and external

abrasion caused by contact with external surfaces, such as roller and panama leads. External

abrasion is usually easy to see on any rope, while internal abrasion is easier to inspect in a

single-braid rope. When a rope moves over an abrasive surface, both factors contribute to

causing the outer surface to move slower, while the internal fibres continue along their original

path. Heat results from this type of friction and heat is an enemy of synthetic fibres.

MITIGATING THE EFFECTS OF ABRASION

Vessels and equipment that have traditionally used wire rope often

have sustained significant damaged caused by fishhooks, broken strands,

etc., which come in contact with the deck and other equipment. These

conditions can damage or significantly reduce the life expectancy of ropes

made with Dyneema

®

. However, preventative measures can be taken to

mitigate these issues by repairing all rope contact points to a smooth and

consistent surface.

The addition of chafe protection utilised on the areas of the line most likely to suffer from abrasion

is critical for the rope’s longevity. These are either sleeves that slide on the rope or spliced into a

line, depending on the construction of the rope and its use.

R

OPE DESIGN AND CONSTRUCTION

One of the best ways to combat unforeseen situations and prevent failure is to select the line

for the application. The advantages of nonjacketed lines are numerous: they are stronger than

jacketed lines size for size and they are easy to inspect and repair. Unlike jacketed lines, which

rupture in the areas that suffer the greatest abrasion and have to be replaced, only the chafe

protection on a nonjacketed rope has to be replaced, saving time and money. A 12-strand

mooring line system such as AmSteel

®

-Blue with Dynalene chafe protection provides the

ultimate in cut and abrasion resistance, and the rope maintains its strength for the long-term.

Dyneema

®

is a registered trademark of Royal DSM N.V.

Dyneema

®

is DSM’s high-performance polyethylene product.