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I-Cover Tube Sleeves

Introduction to I-Cover Tube Sleeves

I-Cover Tube Sleeves are designed and fabricated to seal the gaps between individual tube penetrations through the wall or the roof of fired heater systems.

They prevent cold air ingress through the resultant gaps and at the same time are flexible enough to absorb tube or header movements that are expected between cold (shut down) and hot conditions.

As a result, quilted sleeves prevent the phenomenon of metal dusting or catastrophic carburization caused by thermal quenching on the tubes.

These I-Cover Tube Sleeves are made of high-temperature resistant cloths which can withstand temperatures up to 900°C and are tailor-made with respect to site conditions and specifications to ensure a perfect fit every time.

Features of I-Cover Tube Sleeves

Comparison between I-Cover Tube Sleeves and Conventional Method

I-Cover Tube Sleeves Conventional
Close the gap between the tube and the opening in the roof or floor of a furnace reformer, heater or boiler. Utilizes insulation blanket around the tube.

Conventional method is ineffective as the gaps are not sealed fully allowing the flow of air through and around the heater/ reformer furnaces/process heaters.

Using I-Cover Tube Sleeves is ideal due to its unique characteristic to absorb great axial and lateral movement of the tubes when it expands and contracts. As a result, it prevents the cold air ingress into the reformer furnace, heater or boiler.

I-Cover Tube Sleeves Design and Installation

Firstly, some details are considered, which includes:
  • Process temperature
  • Required cold face temperature
  • Diameter of tubes
  • Minimum and maximum movement of tubes

The data are then used to design & fabricate I-Cover Tube Sleeves in our factories and shipped to the clients.

I-Cover Tube Sleeves are wrapped around the tube and fixed with one stainless steel clamp at the tube and another stainless-steel clamp is fixed permanently at the collar of the roof.

Key Benefits

  • Prevent cold ingress air through the resultant gaps thus preventing furnace efficiency reduction.
  • Flexible to absorb multi-axial and lateral movements.
  • Withstand temperatures up to 1370°C.
  • Reduce the possibility of tube damage due to rapid quenching.
  • Improve burner operation as proper stoichiometric air control can be achieved.
  • Decrease heat loss from exposed tube surfaces.
  • Cost effective with very fast payback on investments
  • Personnel safety enhancement.