Pipe retention slings

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Pipe retention slings

Temporary restriction system for high pressure lines.

IZT retention slings are designed for use in retention or containment systems in order to minimize the risks and damages caused by a breakage or failure of a pressurized pipeline in temporary lines. Developed for use in the Oil Industry, in heads, temporary pipelines, high pressure accessories, among others.

This product line is divided into: 

  • RED: for low pressure. SLING TPR RED.
  • BLUE: for medium pressure. SLING TPR BLUE.
  • ORANGE: for high pressure. SLING TPR ORANGE.
SLING COLORCODEø PIPE/PRESSURERECOMMENDED SHACKLE
RED5-PES-TPR-ROJO-4M2” Maximum Pressure 15K psi7-GRI-0650-G2130 6.5 Ton
  3” Maximum Pressure 8K psi 
  4” Maximum Pressure 5K psi 
BLUE5-PES-TPR-AZUL-4M2” Maximum Pressure 20K psi7-GRI-0850-G2130 8.5 Ton
  3” Maximum Pressure 15K psi 
  4” Maximum Pressure 10K psi 
ORANGE5-PES-TPR-NARANJA-4M2” Maximum Pressure 20K psi7-GRI-1200-G2130 12 Ton
  3” Maximum Pressure 15K psi 
  4” Maximum Pressure 15K psi 

Use

  • Slings are connected as a bow to the pipeline at strategic points, and they are assembled with other slings through shackles.
  • The use of shackles simplifies system assembly and disassembly; speeds up localized disassembly, eventual reparations or stamps changes; thus, reducing operational times. Every IZT retention sling has its own identification tag with the relationships between pipe diameters and maximum pressures allowed. Tested in dynamic scenarios that recreate a pressure pipelines failure situation.
data-sheet-pipelines-retention-slingsDownload

IZAJES Y TRANSMISIONES S.A is the only manufacturer with its own testing center in the country compliant with IRAM regulations.

Recommendations

Unwinding

The coil should be breaked while unwinding so that the wire rope comes out with a certain pressure and does not turn on its axis. This prevents bumps and kinks. If the coil is not equipped with brakes, then an operator should stop it..

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Transport between coils

When the wire rope is carried from a full coil to an empty one or to a machine drum, this should be done from the upper or lower part of both, but never from the upper part of one coil and the lower part of the other, or vice versa.

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Wire rope winding

The wire rope winding on the machine drum must be carried out correctly so that there are no spires overlapping and cross-linking, which would crush and distort the cords. The following figures represent the four cases that could effectively take place:

  1. Right torsional wire winding at the upper part of the drum.
    The mooring point should be located on the left side of the drum.
  2. Right torsional wire winding at the lower part of the drum.
    The mooring point should be located on the right side of the drum.
  3. Left torsional wire winding at the lower part of the drum.
    The mooring point should be located on the right side of the drum.
  4. Left torsional wire winding at the lower part of the drum.
    The mooring point should be located on the left side of the drum.

We do not recommend winding the wire around the drum in several layers, but if so, this technique is applied for the first layer of winding.

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Deflection angle

The deflection angle is that formed by the wire from the first fixed pulley on the edge of the winding drum. It should not exceed 1º 30'.

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Wire cutting

Cutting with shears or scissors. Before cutting, wires are to be tied together on both sides of the cutting area. The number of ties, the width and the distance between them depend on the wire diameter (see table). It is key to avoid longitudinal tilts among the different cord layers, since, in that case, those which have moved the least will bear the greatest part of the load, and there is the risk of breakage.

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Tie characteristics
Wire rope diameterNo. of ties
on each side
of the cut		Tie
length		Distance
between ties		Wire diameter
rec. iron piece to be
used (mm)
Up to 12312150,5 to 0,8
13 to 20325401 to 1,5
21 to 30440501,2 to 2,2
31 to 40450501,8 to 3
41 to 50475502,2 to 3,2

Recommended cuttings

To cut antitwisting wire ropes, we recommend cutting by electric resistance or by welding.

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Calibration

For calibration, the measuring device must be properly used.

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