About Lifting Sling

Veltkamp focuses with lifting equipment under the hook especially on the professional market.

On the website are the standard dimensions and types.

Different types, size and project specific products are available on  request.

All delivered products comply with the EN 1492-1, EN 1492-2 with safety factor SF 7:1.

Exception are the One Way Endless Slings (type ESO):

 

  • for single use only (transport) = according to DIN 60005 = SF 5:1


All products also conform to Machinery Directive 2006/42/EC and are therefore provided with a CE mark.
 

 

Type of Products

Roundslings
professional
Roundslings
with Jacket
Endless Slings SF 7 :1
1 or 2 layers
Endless Slings SF 5 :1
only one way use
Lifting Slings with loops
2 or 4 layers
Coil Slings
heavy duty
Sleeves for
Protection

 

 

Type of Covers

STE
Single Polyester
STD
2-Layers Polyester
Pro
2-way woven Techlon
Pro-C
Polyester and Cordura
Pro-Ultra
2-way woven Dyneema
Protection covers and Edge Pads
4-way woven Dyneema




 

 

Ratios in wear resistance =

Techlon : PES = 2 : 1  /
Cordura : PES = 5 : 1  /
Dyneema : PES = 50 : 1

 


Round Slings

Type: WLL-standard: Expandable to: Material core / cover: Article Numbers:
STE 1 - 10 tons - polyester / 1 layer polyester 30200001 – 30200080
STD 1 - 10 tons - polyester / 2 layers polyester 30202001 – 30202080
Pro 1 - 120 tons 250 polyester / 2 together woven layers Techlon 30210001 – 30200192
Pro-C 10 - 120 tons 250 polyester / 1 layer polyester + 1 layer Cordura 30220001 – 30220144
Pro-X 10 - 120 tons 250 Dyneema / 1 layer polyester + 1 layer Cordura 30230001 – 30230144
Pro-Ultra 2 - 180 tons on request Dyneema / 2 together woven layers Dyneema 30240001 – 30240190

        

Lifting Slings with Loops

Type: WLL-standard:   Material core / cover: Article Numbers:
SLS 1 - 12 tons   2 layers polyester 30050001 – 30050500
Prolift-S 2 - 40 tons   4 layers polyester 30100001 – 30100144
Prolift-TT 1 - 10 tons   2 layers polyester 30072001 – 30072064
Prolift-TT 10 - 25 ton   4 layers polyester 30074001 – 30074044
Prolift-TD 1 - 10 tons   2 layers polyester 30082001 – 30082044
Prolift-TD 10 - 25 tons   4 layers polyester 30084001 – 30084044

   

Regulations textile lifting equipment:

  1. Technical requirements:
    1.  Lifting Slings = EN1492-1
    2.  Round Slings = EN1492-2
    3.  Endless Slings 7:1 = EN1492-2
    4.  Endless Slings 5:1 = DIN 6005
    5.  Machinery Directive 2006/42/EG
    6.  CE-mark
  2.  Inspection: at least 1x per year or depending on operational conditions
  3.  Inspections: only by expert
  4.  Damage: repair by the manufacturer only

 

 
WLL

The Work Load or maximum load (Working Load Limit - WLL) is the maximum permissible payload that may be hoisted during law lifting work.

This is significantly lower than the theoretical tensile strength (Minimum Breaking Load - MBL), depending on the lifting equipment and the work.
The usage factor or safety factor SF at lifting with steel cables is 5, whereas slings on 7.

In the past, instead of WLL uses SWL or Safe Working Load. Today is also still used. This must be a value that has been adapted to the specific situation, if there is not,
for example right is hoisted.

 

Working Load Limit =    minimum breaking strength
              safety factor - 7

 

Inclination Angle (outside corner) ß

 


The inclination angle (outside corner) is of paramount importance in the use of lifting attachments.
 

Larger inclination angle (outside corner) ß = higher load (force) in each part.


Inclination angles (outside corners) greater than 60 ° are forbidden!
 

Note: The load must withstand the horizontal forces!

 


Lifting Chart = Load rating with inclination angle (outside corner) ß

ß = 0 - 7º ß = 0 - 7º ß = 0 - 7º ß = 7 - 45º ß = 45 - 60º ß = 7 - 45º ß = 45 - 60º ß = 7 - 45º ß = 45 - 60º ß = 7 - 45º ß = 45 - 60º
WLL = 100% WLL x 0,8 WLL x 2 WLL x 1,4 WLL = 100% WLL x 0,7 WLL x 0,5 WLL x 1,4 WLL = 100% WLL x 1,12 WLL x 0,8


 

Bending Radius D/d

Keep in hoisting in pants form (also known as basket) always consider the ratio diameter / bending radius of the hoisting tool to select suitable hoist (D/d = 6 : 1 = 100% WLL).


 

 

Sharp Edges

A sharp edge occurs when the radius of the edge is smaller than the diameter of around sling or lifting belt.

Use Dyneema and/or protective covers.

Periodic inspection for damage = at least 1 x per year.

 

 

Avoid wet and ice formation.

 

Right type crane hook:

  1. The minimum length of the loop must be at least 3.5 x the thickness of the crane
    hook. 
  2. The inside corner of the loops on the hook, must not be greater than 20 degrees.

 

 

Dyneema®

  • A super strong synthetic fiber based on high-density polyethylene (UHMWPE = ultra high molecular weight polyethylene).
  • Replacement of chain and wire rope.
  • Also extremely light.

 

 

Apply when:

  • high abrasion resistance is required
  • high cut resistance is required (at static lifting)
  • flexible handling is necessary (flexible and lightweight)
  • it is important that the sling floats
  • resistance against chemicals and micro-organisms is
    necessary
  • reduction of damage to the charge must be of importance


Product properties:

  • elongation at WLL = 0.3%
  • 8 to 15 x stronger than steel
  • 5 x stronger than polyester
  • 40% stronger than Aramid
  • 60% stronger than glass fiber
  • high tensile strength: 3.5 Gpa
  • E-modulus: 98 GPa
  • low specific gravity: 0.97 g/cm³
  • temperature sensitive: melting point 144 - 152 °C.
    Not use for extended periods of time above 100 °C;
    it is brittle at temperatures below -150 °C
  • resistant to friction, sunlight (UV), (sea) water,
    chemicals, micro-organisms
  • scours or not cutting
  • scope = ca. 400 km
  • covers with indicator

 

 

Rejection criteria:

  • No or unreadable label
  • Cuts
  • Melt Seeds by sparks
  • Damaged stitching
  • Chemical attack
  • Where slings the core is visible
  • Distorted metal parts slings
  • When lifting straps at the edges damaged

 






 



Recognition cause breakage

Breakage due to overload

Breakage due to incision

 

Warnings

Avoid overload of the
WLL and Temperature
Avoid knots
and twisting
Use corner protection at
sharp edges and corners
Inspect the equipment
for use
for damage
Avoid excessive
 lifting angle
Avoid contact
with chemicals
Avoid use of
damaged equipment
Prevent the load
rests on the slings