Our services Emergency service Flushing of sewer networks Mechanical method Thermo-chemical method Hydrodynamic method Cleaning of ventilation and air conditioning systems Hydrodynamic method Dry cleaning of ventilation systems Disinfection of ventilation systems Bacteriological examination Diagnostics of engineering systems Video diagnostic examination of communications Trace, search for communications Search for places of depressurization, leaks Assessment of the residual resource of communications Collection and disposal of household and industrial waste Flushing heating systems Disinfection of hot water, cold water systems Plate heat exchanger flushing Flushing technology for systems and equipment Installation of engineering systems Trenchless pipeline replacement Replacement by the method of destruction of the old pipe Tube-in-tube replacement Horizontal directional drilling Industry solutions Industrial enterprises Confectionery production Meat processing plants Dairy industry Bakery production Waste incineration plants Catering Shopping and entertainment complexes Cinemas, theaters, museums and concert halls Boarding houses, sanatoriums, rest houses Hotels Business centers Athletic facilities Housing and communal services Transport Road transport enterprises Railway transport enterprises Airports Embassies and representations Medical institutions Helpful information Site Map About company Corporate code Client references Basic licenses Vacancies Equipment Emergency service Trenchless pipeline replacement Waste collection and disposal Ventilation Heating Diagnostics Pricing Contacts Trenchless pipe-in-pipe installation Pipe-in-pipe replacement technology This method allows for the reconstruction of household water supply systems, fire water supply systems, pressure sewerage communications. The main principle of the method is to lay a new low-pressure polyethylene (HDPE) pipeline into the cavity of the old one, while the diameter of the new pipeline is reduced by 10-15%. Despite the reduction in such cases of the inner diameter of the repaired section of the pipeline, its throughput in some cases practically does not decrease due to the low hydraulic resistance of the new plastic pipe. В рамках подготовительных работ для выполнения замены вся протяженность заменяемого трубопровода разбивается на прямые участки, производится демонтаж запорной арматуры, которая при необходимости в дальнейшем заменяется на новую. В местах поворота трубопровода выполняются локальные вскрытия грунта, участок поворота демонтируется. Перед протяжкой нового трубопровода выполняется гидродинамическая очистка полости участков ремонтируемого трубопровода от отложений, а также проводится видеинспекционный контроль. With the help of special welding equipment, sections of the required length are prepared on the surface, a special head is welded on one side, and a cable is fixed to the head. Pulling is carried out using a special pipe pulling device installed above a well or foundation pit. The laid sections of the new HDPE pipeline are connected using couplings and fittings for electrofusion welding. Diagram of the pipe-in-pipe pipe replacement process. 1.The head is connected with a cable; 2. Traction device; 3.New HDPE pipe. © 2017 - Engineering Service Company