Inspection of Chain Slings

8/10/2019 Inspection of Chain Slings

1/30

As per BS EN 818 -1, -2, -3, -4, -5, -6, -7


2/30

An assembly consisting of chain or chains

joined to upper and lower terminals suitable

according to the requirements of this

European Standard for attaching loads to

the hook of a crane or other lifting machine.

CHAIN SLING:-


3/30

TERMINOLOGY:-

Master Link :- A link forming the upper terminal of a chain by means

of which the sling is attached to the hook of a crane.

Length Of A Leg :- For a finished sling, the length from the lower

bearing point of the lower terminal to the upper bearing pointof the upper terminal.

Intermediate Master Link :- A link used to connect one or two legs

of a sling to a master link.

Lower Terminal :- A link, hook or other device fitted at the end of aleg of a sling, remote from the master link or upper terminal.


4/30

Mechanical Joining Device :- A means of connection which does not

depend on welding.

Joining Link :- A welded link fitted to the end of a chain to connect

it either directly or through an intermediate link to an upper orlower terminal or intermediate master link, or in the case of an

endless slug to the other end of the chain.

Intermediate Link :- A welded link used to form a connection

between the terminal and the joining link fitted to the chain.

TERMINOLOGY:-


5/30

COMPONENTS OF CHAIN SLING:- (Single Leg)


6/30

COMPONENTS OF CHAIN SLING:- (2 Leg)


7/30



8/30



9/30

Sections Of Slings To Which M.P.F. Is Applied


10/30

1) The chain should articulate freely.

2) The maximum permissible wear is 8% reduction in material

diameter for the chain, components and fittings.

3) The max. elongation, mainly due to seating and interlink wear, is 5%.

4) Unless the sling is specifically designed otherwise, the legs of multi-

leg slings should be of equal length so that the seat of hooks, or

bearing point of other fittings, is equal. This is an important matter to

check, particularly if a leg of chain has been replaced, as the pitchmay vary from the original grade and type of sling.

VISUAL INSPECTION


11/30

5) There should be no signs of bending, twisting or other distortion tothe chain, master link or other fittings. Particular attention is

necessary at the point of choke.

6) There should be no signs of nicks, cracks, corrosion or chemical

attack.

7) Hooks should show no signs of opening or of distortion and, where

fitted, safety catches should be undamaged and operate freely.

8) Marking should be clear and legible; it must give all of thenecessary information for the particular.

VISUAL INSPECTION


12/30

VISUAL INSPECTIONCHAIN & MASTERLINK


13/30

VISUAL INSPECTIONCHAIN ELONGATION

USABLE NON USABLE

The elongation is normal

and the Gauge shows

the elongation is

normal / under control

The elongation is not

normal and the Gaugeshows the elongation

is more


14/30

VISUAL INSPECTIONCHAIN ELONGATION


15/30

COMMON CHAIN SLING ACCESSORIES


16/30

COMMON CHAIN SLING ACCESSORIES

Usage of proper device at proper application is important


17/30

IMPROPER LOADING PRACTICES

Table 1Table 2


18/30

GRADES OF CHAIN

Table 1

Table 2

Table 1

Table 2


19/30

GRADES OF CHAIN

Grade M = the metric equivalent of grade 40Grade S = the metric equivalent to grade 60 (actually 63)

Grade T = the metric equivalent to grade 80.

where d wasthe nominal

diameter of the

chain in mm


20/30

GRADES OF CHAIN


21/30

GRADES OF CHAIN


22/30

GENERAL POINTS - FACTS


23/30

GENERAL POINTSAPPLICATION


24/30

GENERAL POINTS - MARKING


25/30

GENERAL POINTS - DAMAGES


26/30

GENERAL POINTS - DAMAGES


27/30

GENERAL POINTSASSEMBLING & REMOVING OF CONNECTING LINK


28/30

GENERAL POINTSLATCH OF HOOK


29/30

GENERAL POINTS - CHAIN

CARE FOR CHAINC

HEATH

APPLY CORRECT WLLA

IDENTIFICATIONI

NEVER USE DAMAGE CHAINN


30/30

THANK YOU

Inspection of Chain Slings

Documents

Transcript of Inspection of Chain Slings