Inline Services Is Your Trusted Resource for Pipe Freezing Services

Inline’s Pipe Freezing services are an viable choice for applications where pressurized line isolation is needed, but using the Hot Tapping method isn’t ideal.  This safe and efficient method of line isolation also permits pipeline operators to perform hydro-tests with lower volumes of water saving discharge/filtration costs.

What is Pipe Freezing?

Pipe Freezing is the method of applying liquid nitrogen onto the external surface of the pipe, lowering the temperature of the pipe, which lowers the temperature of the pipe fluid below its freezing point, thus creating a freeze plug capable of withholding pressures up to 4000psi.  This method is ideal for pipe sizes 1/2″ to 30″.

The Pipeline Freezing method is often used for valve/pump replacement, pressure testing and for HVAC system repairs.

Why Choose Pipe Freezing?

Pipe Freezing can often be a better solution when needing to repair or replace pipeline systems. This is because it is both a safer and faster alternative to hot tapping, when the uses call for it. There are many advantages of using the Pipeline Freezing method.  Pipe Freezing methods are a non-intrusive alternative to developing temporary piping isolations. Pipe Freeze Plugs require no special welding or setup costs often associated with Line Stop Fittings.

Another advantage of using the Pipe Freezing method is that the the freeze time can be predicted based on pipe size, system conditions, and ambient temperatures. This allows for efficient time and resource planning.

Examples of typical pipe freezing times:

  • ½” – 6 minutes
  • 6” – 48 minutes
  • 8” – 90 minutes
  • 12” — 3 hours
  • 20” – 4 hours

Other benefits of using the Pipe Freezing technique include:

  • Eliminates need for bulk fluid transfer or storage
  • Eliminates need for draining down systems and venting procedures
  • Enhances safety when working on lines containing hazardous liquids.

What Are The Limitations of Using The Pipe Freeze Method?

Pipe Freezes can only be accomplished if there is no flow and the line is full as well as allowing for adequate
expansion space for collar, safe distance from welds, transitions, and dissimilar metallurgy.

  • Refineries
  • Petrochemical Plants
  • Transmission Pipelines
  • Power Generation
  • Conventional & Nuclear
  • Fire Protection Systems
  • Hotels & Apartment Complexes
  • Office Buildings
  • Hospitals & Institutions
  • Schools
  • Malls & Shopping Centers
  • Pipe sizes ½” to 30”
  • Typical Pipe Freezing Times
  • ½” – 6 minutes
  • 6” – 48 minutes
  • 8” – 90 minutes
  • 12” — 3 hours
  • 20” – 4 hours

General Info needed:

  • Scope of Job
  • HOLD TIME
  • Pipe Material & Size
  • Pipe Contents
  • Pipe Temperature & Operating Pressure
  • Water
  • Sewage
  • Slurries
  • Brine
  • Fuel Oil
  • Glycol
  • Heavy Hydrocarbons
  • Oils
  • Static line
  • Adequate expansion space for collar
  • Safe distance from welds
  • Transitions & dis-similar metallurgy