Systems of pre-insulated pipelines

“SarmatTermoEngineering” construction company (subsidiary of “Sarmat” holding company) develops and manufactures effective heat insulation for utility and heat networks. Systems of pre-insulated pipelines help to minimize heat energy losses in utility and heat networks.

“SarmatTermoEngineering” construction company (subsidiary of “Sarmat” holding company) systems of pre-insulated pipelines include:


Pipes with polyurethane foam insulation which is protected by sheath (pre-insulated pipes)


Set of shaped objects necessary for complementing heat pipelines (pipe tees, pipe bends, females, sleeves for insulation of butt joints and so on)


Real-time Remote Control System (RRCS) for monitoring the insulation condition

Pre-insulated pipe is a “sandwich”-type construction which consists of “inner” steel or galvanized tube, polyurethane foam heat insulation layer and outer galvanized or high-density polyethylene covering (it depends on pipelining type).


In Belarus, pre-insulated pipelines have been applied for around 15 years while in Europe this type of pipelines has been applied for more than 40 years and has reached 80% from total amount of piped networks. According to the Resolution of the Council of Ministers of the Republic of Belarus dated 27.12.2002 all the economic entities should apply pre-insulated pipes while constructing, major repairing or reconstructing heat networks.


Application benefits of pre-insulated polyurethane foam pipes manufactured by “SarmatTermoEngineering” construction company (subsidiary of “Sarmat” holding company):
Reduction of heat loss on the line from 45 to 2 %
Increase of line endurance up to 30 years
Reduction of costs for current maintenance in 3 times
Reduction of working expenditures in 9 times


Pipeline pre-insulation technology with the use of polyurethane foam (PUF) is based on unique physical and mechanical properties of the material:


The lowest heat conductivity (in comparison with other heat insulants)
High durability of PUF
Operating temperature of PUF - up to 1300°˚ÑC
High moisture resistance of PUF
Good PUF adhesion with pipe surface
High mechanical strength
Resistance of PUF to alkaline and acid environments
Nontoxicity

Range of pre-insulated pipes

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Black pipe with polyethylene sheath

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Black pipe with galvanized sheath

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Galvanized pipe with polyethylene sheath

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Galvanized pipe with galvanized sheath

PI-pipes and shaped objects with polyethylene sheath are used for underground pipelining of heat networks. Pre-insulated pipes and shaped parts with galvanized sheath are used for above-ground pipelining.


Range of shaped objects
Pipe-bends

Parts of pipeline used for changing pipeline direction at an angle.

Piers

Devices used for pipeline installation in operational position and for load transmission to the basement or to the load carrying structure

PI -pipe tees

Shaped objects for pipe branches installment.

Heat-shrinking sleeves

Connecting devices used for butt insulation in PI-pipes. They are manufactured by unique technology on the basis of high-strength modified polyethylene. They hermetically shrink on the pipe casing under the influence of temperature.


Pulse type Real-time Remote Control System (RRCS)

Warning system

It is used for monitoring of PUF-insulation condition during all in-service time. It helps to define kind of damage, detect its location and repair it.

PI-pipe is reliable and effective but the effectiveness and reliability of the heat pipeline can be significantly lower if flashing of PI-pipe butt junctions is bad.


All practical questions of designing PI - pipeline systems are covered in “Sarmat” Ltd. publications:



“Recommendations for PI -pipeline designing”

“Catalogue of pre-insulated pipes manufactured by “SarmatTermoEngineering””

“Manual for system assemblage of pre-insulated with foam polyurethane pipelines of nominal size 25/90-630/800”

“Manual for designing, assemblage and operating of ROM system”


You can ask a question to get additional information about application of “SarmatTermoEngineering” pre-insulated pipeline systems.