MID presentatie 4 October 2010 R1 [Read-Only] Lloyds 4-10-2… · Energy (ModuSpec, Scandpower)...

4-10-2010

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Lloyd s Register: Business unit MarineLloyd s Register: Business unit Marine

Hangt de bagger industrie aan een (zijden) draadje

Door:Cor DekkerSenior SpecialistMarine Equipment & Lifting Components

MID 4 October 2010

Lloyd s Register: Business unit: MARINE

The Group at a glance

278 offices delivering services in 100 countries

Some 7,500 employees of 90 nationalities

80 companies

Celebrating our 250 year anniversary this year

Four business divisions:

Marine

Transportation (rail sector)

Energy (ModuSpec, Scandpower)

Management Systems (LRQA)

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Steel wire ropes

PRODUCTION SCHEME STEEL WIRE ROPE

ROPE TERMINOLOGY

CONSTRUCTION OF A STEEL WIRE ROPE

LAY DIRECTION

TYPE OF LAY AND THEIR APPLICATIONS

TYPES OF STEEL WIRE ROPE IN USE

ROTATING RESISTANCE

REQUIREMENTS FOR ROPES USED IN LR CLASSED CRANES

DISCARD OF ROPES




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Production scheme steel wire rope

MID 4 October 2010MID 4 October 2010Hangt de baggerindustrie aan een (zijden) draadje


ROPE TERMINOLOGY


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Rope

Strands

Wires

Construction

Warrington Seale

Core

6 x 36 + IWRCWS SUMMARY

EXAMPLE




SIX STRANDS

41 Wires in each strand

Warrington-Seal

Independent wire rope core

1

2

3

4

5

6

IWRC

Warington layer

Seal layer

16

16

8

1

41MID 4 October 2010

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LAY DIRECTION

ORDINARY OR REGULAR LAY

LANG S LAY

Lay direction of strands

Lay direction of rope



LAY DIRECTION

LEFT HAND ORDINARY (OR REGULAR) LAY

RIGHT HAND ORDINARY (OR REGULAR) LAY

OF THE ROPE


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LAY DIRECTIONORDINARY LAY

LANG S LAY

sZ RHOLzS - LHOL(Strand / Rope)

zZ RHLLsS - RHLL(Strand / Rope)



ROPE LAY DIRECTION

RULE OF THE THUMBPOINT YOUR THUMB IN THE DIRECTION OF FIXED ROPE PART ON THE DRUM

POINT YOUR FINGERS IN THE UNREEVING DIRECTION

THE HAND WHICH MATCH IS THE LAY DIRECTION OF THE ROPE

ON DRUMS

Right hand lay ropeLeft hand lay rope


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ORDINARY LAYLifting guided loadsLifting unguided loads on several fallsLifting loads with right and left handed ropes in pairs

Ordinary constructions have:

High internal tensions during bendingLow sheave surface contactPoor wear resistance

LANG S LAYLifting constant tensioned guided loads (boom wires)

Lang s lay constructions have:

Low internal tension during bendingHigh sheave surface contactGood wear resistancePoor resistance for deterioration of the rope

TYPICAL CONSTRUCTIONS




ORDINARY LAYFor almost all applicationsGood resistance for deterioration of the rope

Ordinary constructions have:

High internal tension during bendingLow sheave surface contactPoor wear resistance

ROTATING RESISTANCE CONSTRUCTIONS

LANG S LAYFor constant tensioned applications (boom wire)Poor resistance for deterioration of the rope

Lang s lay constructions have:

Low internal tension during bendingHigh sheave surface contactGood wear resistance


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TYPES OF STEEL WIRE ROPE IN USE

DIE-FORMED

Conventional produced rope compressed by rollers

DIE-SHAPED

Strands produced from shaped wires



ROTATING RESISTANCEIn a conventional rope, an external load creates a moment which tries to untwist the rope and to rotate the load.

A rotation-resistant Wire Rope has a steel core which is an independent rope, closed in the opposite direction to the outer strands.

Single fall operation:

The use of non- rotating ropes is mandatory for the lifting of unguided loads with a single fall of rope.

Multiple fall operation:

Traditional ropes achieve a higher service life than rotation-resistant ropes when operating under identical conditions in multiple falls.

Providing there are no other special conditions that require the use of rotation- resistant ropes, traditional ropes should be used in multiple fall conditions.


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ROTATING RESISTANCE

Outer strands - LHIWRC - RH

Outer strands

Outer strands

Wire Strand Core

IWRC

12 (1+6)

6 (1+6)1 (1+6)

12 (1+6)6 (1+6)1 (1+6)

16 (1+6)



Requirements for ropes used in LR classed cranes

For ropes intend to be used in lifting appliances two important documents are involved

1. Code for Lifting Appliances in a Marine Environment

2. Rules for the manufacture, testing and certification of materials


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3. Marine Survey Procedure Manual

Surveyors have to deal with another

important document

Which can be found on surveyors laptop and/or on

the hub



Requirements for ropes used in LR classed cranesCODE LAME Ch.6 - Section 6 6.3 Construction and application

6.3.4 Wire ropes for running rigging are to be constructed

of not less than six strands over a main core.

Each strand is, generally, to consist of not less than 19 wires

and may have a fiber or a wire core.

Where the strand has a fiber core, the wires are to be laid round it in not less than two layers.

6.3.5 Wire ropes for standing rigging, guy pendants and

similar applications are generally to be constructed of six

strands over a wire core.

6.3.6 Lang's lay rope will not normally be accepted for

any part of a ship's cargo handling gear.

6.3.8 Consideration will be given to the use of other constructions and nominal strengths and to the requirements for particular applications


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Equipment for Mooring and AnchoringChapter 10

Section 6Steel wire ropes6.1 Scope6.1.1 Provision is made in this Section for the requirementsfor the manufacture, testing and certification of steel wire ropesintended to be used for general marine purposes, as well aspermanent anchoring, mooring and marine lifting applications.

6.2 General requirements6.2.1 For general marine purposes, such as stream wires,towlines and ship mooring lines, the construction is to be inaccordance with Table 10.6.1. The construction, diameterand strength of steel wire ropes for permanent offshoreapplications, such as mooring, anchoring and lifting, arecovered by other LR Rules.Alternative applications of wire ropes may be accepted, subject tospecial consideration.




4.3 Deck cranesd) The crane is to be reeved with certified hoist and luffing ropes from an approved manufacturer. The surveyor is to ensure that ropes of the correct diameter, construction and minimum breaking load, as stated on the approved plans, are fitted

e) Running wire ropes will normally be of a 6-strand or multi-strand non-rotating construction with either independent wire rope or fibre cores. They should be galvanised

MSPM


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Question:Question:

Are these constructions allowed?Are these constructions allowed?

YESYESYES

WHY?WHY?

Rules for materials:6.2.1 Alternative applications of wire ropes may be accepted, subject to special consideration .

MSPM:4.3 Deck cranesAs stated on the approved plans

Code LAME6.3.8 Consideration will be given to the use of other constructions and nominal strengths and to the requirements for particular applications





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DISCARD OF ROPES ISO 4309:2004 (E)

3.5Discard criteria

3.5.1 General

a) The nature and number of broken wiresb) Broken wires at the terminationb) Localized grouping of wire breaksc) The rate of increase of wire breaksd) The fracture of strandse) Reduction of rope diameter, including that resulting from core deteriorationf) Decreased elasticityg) External and internal wearh) External and internal corrosioni) Deformationj) Damage due to heat or electric arcingk) Rate of increase of permanent elongation


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DISCARD OF ROPES ISO 4309:2004 (E)P

aral

lel-c

lose

d ro

pes



DISCARD OF ROPES ISO 4309:2004 (E)

Rot

atin

g re

sist

ant r

opes


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QUESTIONSQUESTIONS



INSPECTION OF ROPES

Is a serious business

THINK SAFETY

STOP Where you are in a position of safetyTHINK About where you are and what you are about to doOBSERVE What is going on around youPLAN Your safe way in to your task site

LIFE MATTERS

Don t take things for grantedDon t take a risk

REMEMBER there is no redundancy in a crane!!


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For more information, please contact:

Cor Dekker

Lloyd s Register EMEA

Weena zuid 170

3012 NC Rotterdam

T +31 (0)10 4145 088F +31 (0)10 2140 190E [email protected]

LIFTING APPLIANCES


MID presentatie 4 October 2010 R1 [Read-Only] Lloyds 4-10-2… · Energy (ModuSpec, Scandpower)...

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