Tag:pipeline

№1|2012

WATER DISTRIBUTION NETWORKS AND WASTEWATER COLLECTORS

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UDC 628.147.2:65.012.2

Khramenkov S. V., Orlov V. А., Primin O. G.

Computerized support of the Moscow water pipeline renovation scheduling strategy

Summary

Comprehensive evaluation of the expediency criteria of pipeline relaying or renovating involves a lot of calculations, large bulk of operating and diagnostic data processing. It becomes possible only if computer-aided programs are available that provide for a basis for a valid assessment of the pipeline renovation project and scope of work. Scheduling Pipe Renovation program has been designed by MosvodokanalNIIproject OJSC in cooperation with Mosvodokanal MPUE and used for Moscow water pipeline maintenance.

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№1|2019

PIPELINE SYSTEMS

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UDC 628.144:532.542/.543

Prodous O. A., Terekhov L. D., Smolin E. S.

Analysis of the international and domestic computing dependencies for the calculation of the head loss in pipelines made of polymer materials

Summary

The computing dependencies regulated by the domestic and international standards for the hydraulic calculation of pressure pipes made of polymer materials are considered. The design values of hydraulic characteristics of 600 mm diameter pressure polyethylene pipes obtained at a test installation (600 mm diameter pipe lined with polyethylene, 35.04 m section length) were compared. The comparative analysis of the computing dependencies used both in Russia and abroad for calculating the head loss in the pipes made of polymer materials was carried out. The priority sequence of using the international and domestic dependencies for hydraulic calculations of pipelines made of polymer materials is recommended.

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№7|2014

WATER DISTRIBUTION NETWORK RELIABILITY

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UDC 628.144.62-192

Primin O. G.

Analysis of factors producing an effect on the integrity and environmental safety of water distribution networks

Summary

The environmentally safe construction and operation of public utilities facilitates to a large extent the sustainable deve­lopment of cities and communities. Pipelines of a water distribution network can be referred to the basic elements of the municipal water supply system and, as operational practice shows, are most vulnerable. Transition to market economy, reforming housing and public utilities under conditions of wear and aging of engineering life support systems of the Russian cities and communities, lack of material and financial resources for their renovation have significantly exacerbated the ecological situation in the country. Unsatisfactory condition of the water supplying pipelines in most of the cities, imperfect operation management result in numerous pipeline failures and, consequently, in material and environmental damages caused by the changing hydrogeological territorial regime, underflooding, raw wastewater discharge into water bodies and surface spills, increased soil corrosiveness etc. In that context supplying the population with sufficient amount of drinking water of the required quality and environmental safety of water use have been most urgent issues in Russia. The integrity and environmental safety have been the main requirements set to the public water supply pipelines. The results of studying the assessment and analysis of the factors effecting the integrity and environmental safety of the water distribution pipelines are presented. The assessment and analysis of the external factors (parameters, characteristics) that can produce a significant effect on both the pipe integrity and environmental safety and their efficient lifetime are the basis of developing the measures on improving the reliability of the municipal water distribution pipelines.

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№10|2012

WATER DISTRIBUTION NETWORKS

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UDC 628.147:62-192

Shushkevich E. V., Menshchikova O. A., Generalov N. S., Ivanov Ye. V.

Introducing innovative materials and technologies in the water distribution network

Summary

A review of the advanced innovative materials and technologies used in reconstruction and operation of the water distribution network is presented. The basic causes of pipeline failure are considered, the advanced technologies and equipment that contribute to extending the pipeline operational life are described. A comprehensive analysis of the newly developed corrosion-resistive coatings, socket joints is given alongside with the results of retrofitting energy-independent systems of monitoring water distribution network parameters based on multiparameter sensors and remote control of the shutoff and control valves. The experience of MPUE Mosvodokanal in using innovative trenchless technologies of pipeline repair and rehabilitation is systemized.

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№6|2014

WATER DISTRIBUTION NETWORKS

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UDC 628.14.001.57

Shishov S. Yu., Ivanov Vlad. Mikh., Bychkov D. A., Nezamaev E. A.

Hydraulic model for monitoring and control of the Tumen public water supply operation

Summary

Geographic information technologies allow facilitating significantly the task of operating the public water supply of an urban. In Tumen designing a hydraulic model of the water distribution network operation on the basis of «Zulu» program-design package has been carried out since 2006. The system is aiming at improving the quality, reliability and energy efficiency of the water supply and distribution operation. At the initial stage an integrated design scheme of the major water mains was developed. This hydraulic model provided for developing and implementing a number of important measures for the optimization of the water distribution network operation mode in Tumen. To improve the accuracy the model was further detalized by adding pipelines to every customer into the design scheme. At the same time pipeline certification started with recording results in the geographic information system. Calibration of the detailed hydraulic model was carried out on the basis of the information obtained from 530 pressure gauges installed at the residential service connections. The carried out calculations were noted for high accuracy (to 0.3 atm deviation). With the help of the detailed hydraulic model the following tasks are being accomplished in «Tumen Vodokanal» LLC: changing the operation modes of the pumping stations, planning water mains outage, determining technical possibility of connecting new objects. Basing on the calculations in 2011 a project of installing 24 pressure control valves in the water distribution network was implemented. The geographic information system is noted for the function of using map layers of tile-servers in Internet, as well as for possible data storage and failure analysis. The information obtained in the process of using the detailed hydraulic model is widely used by the distribution network operating service of «Tumen Vodokanal» LLC for the team task description and determining gate valve closure pattern.

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№2|2014

PIPELINE NETWORKS

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UDC 621.644.2

Orlov V. А., Averkeyev I. A., Khrenov K. E.

Modeling strength properties of inner pipe protective linings

Summary

Lately polymeric spray applied protective linings have been widely used for rehabilitation of old water supply pipelines. Investigations of physical and mechanical properties of Scotchkote™ 169HB polymeric lining spray applied on the inner surface of old water pipes were carried out. In the process of experimental studies Instron 3345 electromechanical tensile testing machine and Ansys software package of finite element analysis were used. In the process of testing a stress model of two-layer pipe structure based on steel pipeline and polymeric lining the following results were drawn: maximum tensile strength of lining 14.95 MPa; flexural yield stress 13.92 MPa; maximum breaking extension 25.57 mm (~ 13%). The strength properties of a steel pipeline with perforation damage were investigated in the process of trenchless rehabilitation with the use of Scotchkote™ 169HB inner lining within the operation range of 0–50 years at 20 °С. With hole diameter enlargement over time to 20 mm the system strength criterion has the value more than 1; herewith the two-layer structure will be age-resistant while providing for the required strength properties for 50 year operation. If the hole diameter is more than 20 mm the strength criterion values less than 1 will be observed which does not ensure the required strength properties of the two-layer pipe structure. The relationships for calculating pipeline strength after the lining application as well as the model itself constructed in the system of Ansys finite element analysis are suggested. This will provide for predicting the behavior of «pipe + Scotchkote™ 169HB protective lining» two-layer structure for various pipeline opera­ting conditions.

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№1|2012

WATER DISTRIBUTION NETWORKS AND WASTEWATER COLLECTORS

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UDC 628.24:62-192

Alekseev M. I., Yermolin Yu. A.

Reliable operation of wastewater collection systems and ways of its improvement

Summary

Characteristics of the three constituents of a municipal wastewater collection system, i.e. structural, design and operational are presented. Their impact on the reliable operation of the entire wastewater collection system is discussed. The reasons of reliability degradation of each of the constituents are analyzed. Based on the analytical results the specific features are considered and a number of administrative and technical measures to improve the reliability of the wastewater collection system both at the design stage and in the process of operation are suggested.

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№05|2015

LAWS, STANDARDS, NORMATIVES

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УДК 628.17.001.4

Primin O. G., Aliferenkov A. D., Otstavnov A. A.

Regulatory support of ductile iron pipe use in Russia

Summary

The integrity and environmental safety are among basic requirements imposed to the municipal water and wastewater systems. An appropriate choice of pipe material is of primary importance for ensuring water transportation pipeline integrity. For many years steel and cast iron have been the main pipe materials used in public water supply in Russia. Lately ductile iron pipes widely used overseas and in Russia, in the Moscow water supply system, in particular, have been competing with steel (metal) pipes. The wider use of ductile iron pipes in drinking water supply until recently was restrained by the lack of the proper regulatory framework, including general lack of instructions on the use of ductile iron pipes in Construction Rules 31.13330.2012 «Water supply. Public utilities» (Revised edition of Construction rules and regulations 2.04.02-84*). The information on these pipes and on the introduction of amendments to Construction Rules 31.13330.2012 related to the use in water supply systems, and also amendments to Construction Rules 66.13330.2011 «Design, construction pressure water pipelines and sewers with the use ductile iron pipes» in relation to their use in soft and subsi­ding soil is presented. The amendments were approved by the Ministry of Housing and Construction of Russia and put into force on April 30, 2015.

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№11|2013

PIPELINE SYSTEMS

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UDC 628.214:532.595.2

Primin O. G.

Ensuring reliable and environmentally safe operation of pressure sewers

Summary

Surge in a pipeline is a significant factor that is affecting the environmental safety and reliability of the public wastewater disposal system. In case of an emerging surge noticeable pressure fluctuations occur that could cause pipeline burst and damage of the related hydraulic and mechanical equipment (pumps, valves etc.). It results in sewage spills, material and environmental losses. The main causes of an emerging surge in municipal pressure sewers can be as follows: mains fai­lure, imperfections of the control schemes of the main pumping units at the sewage pumping stations. To ensure reliable operation of the pumping stations the use of hydromechanical devices as well as of high-speed emergency switching on automatic and protection devices including controlled electric drives and softstarters is provided. It was determined that in wastewater disposal practice hydromechanical fittings that reduce the surge effect shall be used. To prevent from surge water discharge through bypasses with installing safety valves and hydraulic tanks is used. In addition to wastewater discharge from pumping stations pressure sewers of intricate shape shall be equipped with air intake and relief devices at the intermediate points. It is found that surges in operation of sewage pumping stations can be eliminated by improving the reliability of external power supply by establishing truly independent power sources, designing combined power supply schemes, high-speed automatic switchover devices in 6–10 kV switchboards of big stations.

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№10|2010

POTABLE WATER SUPPLY

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UDC 628.156

Khrenov K. E., Bogomolov M. V., KOZLOV M. N., Shushkevich E. V., Khramenkov S. V., Menshchikova O. A.

Experience of Introduction of Innovation Technique for Prevention of a Water Hammer

Summary

The water hammer is a serious threat to pipeline systems and pumping equipment. This phenomenon constitutes a special hazard to the systems of water supply and sewerage of a big city. Emergencies and interruptions in the operation of water supply and sewerage networks may lead to grave consequences for the whole of municipal services. Examples of such situations making it possible to assess the scales of possible consequences are given. Basic reasons for generation of the water hammer are described; a brief excursus into the history of study of this phenomenon is presented. A considerable part of the article is devoted to measures aimed at prevention of the water hammer in the systems of water supply and sewerage of Moscow and to the use of energy efficient innovation technique.

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№6|2014

EQUIPMENT OPERATION EXPERIENCE

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UDC 628.24:621.397

Shchavelev A. S., Tsvilii S. V., Slivenko K. B.

The experience of introducing TV-inspection of sewers

Summary

Sustainable operation of utility distribution systems is an essential condition of ensuring comfortable life in megacities. Integrity and long operational life are the main requirements to the different-purpose pipelines (gas and water supply, sewers etc.). Regular TV-inspections of sewer condition provide for more efficient distribution of operation and repair expenditures, reduction of emergency repairs. The practical experience of establishing a TV-inspection laboratory in «Tumen Vodokanal» LLC and the results of its activities during 2011–2013 are presented. TV-inspection is an advanced technology of evaluating technical condition of underground utility distribution pipelines and engineering structures. The efficiency of the pipeline TV-inspection method when introduced into the flow process is shown. For the entire period of operation the TV-inspection laboratory specialists have investigated more than 350 objects, i. e. more than 46 kilometers of sewers, among them 30 kilometers of newly built networks. By means of using TV-inspection the time for determining the causes and locating blockages, leaks and other sewer pipe failures is reduced. Therefore, the amount of excavating and hence the general cost of repair works is reduced. Significant improving the culture and quality of construction works is an unconditional success of the laboratory activities. During two and a half years of the laboratory operations the number of facilities approved for operation on the first try increased more than 10-fold, whereas the number of defects to be eliminated with relaying or repair of pipe sections reduced more than 20-fold.

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№6|2013

PIPELINE NETWORK REHABILITATION

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UDC 621.644

Ishmuratov R. R., Stepanov V. D., Orlov V. А.

The experience of applying trenchless spiral wound technology of pipeline rehabilitation at the Moscow projects

Summary

The specific features of the advanced spiral wound technology of trenchless rehabilitation of water and sewage pipelines based on the use of PUF coating that forms a new pipe inside the old one are presented. The operation sequence during the implementation of separate modifications of this technology (with and without filling pipe space) is stated by the example of a 420 mm diameter sewer section rehabilitation. The projects of rehabilitating old municipal and storm water sewers of different diameters and length by using trenchless spiral wound technology are presented.

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№10|2010

POTABLE WATER SUPPLY

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UDC 628.152

Shushkevich E. V., Bastrykin R. I., Aleshina E. V.

Features of Operation Mode of Water Supply and Distribution System under the Conditions of Decrease in Water Consumption

Summary

In connection with considerable decrease in volumes of water consumption influencing on an operation mode of water supply facilities of a city, optimization of hydraulic operation mode of all links of the system of water supply and distribution is necessary. These links are treatment facilities, pumping stations of the 2nd lift, regulating centres and pumping stations of the 3rd and 4th lifts situated within the precincts of the town as well as a distribution system and a consumer who should receive a qualitative product meeting the specified requirements. In the issue of assessment of influence of water consumption decrease on the operation mode of facilities, specialists of the MCUE Mosvodokanal have developed the complex of immediate and long-term measures aimed at optimization of conditions of water supply and distribution, conservation of some water supply facilities.

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№7|2010

PROBLEMS, PERSPECTIVES

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UDC 628.17.08:681.121

Lurie M. S., Lurie O. M.

Assessment of a Random Error of Vortex Flow Meters in the Course of Their Operation

Summary

Methods of the assessment of a random error of vortex flow meters and water meters in the course of their operation are considered. This methodology is based on the statistical treatment of measurements of instantaneous values of vortex formation of the flow meter placed in the working pipeline. The scheme of connection of the vortex flow meter implemented in the submerged variant reducing the cost considerably and making it possible to use these instruments for measurement of a flow rate in large diameter pipelines and open canals is presented.

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№3|2016

DRINKING WATER SUPPLY

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UDC 627.84

Sal'va A. M.

Prospects for the development of public water supply in the regions  on the other side of the river in the Central Yakutia

Summary

A brief description of the natural environment in the regions on the other side of the river in the Central Yakutia is presented. Based on the analysis of the ecological situation in these regions and on the results of the long-term medical monitoring of the public health a special program of ensuring water supply of the region was developed. The construction of public water supply systems was launched. The process flow schemes of three water mains are presented. The water supply systems include head floating pumping stations, water reservoirs, water basins, transfer pumping stations, pipelines and canals.

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№8|2017

PIPELINE SYSTEMS

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UDC 628.1/.2:621.644.075

Prodous O. A., Terekhov L. D.

Selection of polyethylene pipe grades for trenchless rehabilitation of water and wastewater pipelines

Summary

In the world practice different methods of trenchless rehabilitation of water and wastewater pipes are used. Selecting a method of trenchless rehabilitation is recommended solely after having compared the cost of the set of process equipment, its payback period and hydraulic characteristics of the pipeline before and after the rehabilitation. A method of substantiating the selection of polyethy­lene pipe grades for trenchless rehabilitation of water and wastewater pipelines is presented. The method of selecting the diameter of polyethylene pipes is as follows: for a certain pipe material the inner diameters of the pipeline under rehabilitation and pulled through polyethylene pipe are determined according to the existing standards; the ratio between the inner diameter of the pipeline of the section under rehabilitation and the outer diameter of the polyethylene pipe pulled through (by any method) should differ by only one standard size by grades; for comparison the hydraulic characteristics of the pipeline before and after the trenchless rehabilitation are determined by tables (handbooks); the cost of the process equipment, payback period and the hydraulic characteristics of the pipeline before and after the rehabilitation are compared. Thereafter the diameter of the pulled through polyethylene pipes is accepted. A comparative analysis of the hydraulic parameters for two methods of trenchless rehabilitation with the use of 160–400 mm diameter polyethylene pipes was carried out. The results of comparing the hydraulic characteristics of a pipeline in the process of rehabilitation with and without host pipe destruction are presented.

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№6|2017

PIPELINE SYSTEMS

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UDC 628.144:621.644.073

Primin O. G., Aliferenkov A. D., Ten A. E.

The use of ductile iron pipes in karsted areas

Summary

In providing for the integrity of water and wastewater pipelines the correct choice of pipe material is very important. For many years the main pipe materials in the public water supply systems in Russia have been steel and cast iron. Lately ductile iron pipes have competed with polymer and steel pipes. The wide use of ductile iron pipes in drinking water supply systems until later has been inhibited because of the lack of an adequate regulatory environment. Introducing amendments to Construction Rules 66.13330.2011 «Design, construction of pressure water and wastewater networks with the use of ductile iron pipes» related to the use of ductile iron pipes in karsted areas will enhance the volume of drinking water pipeline construction in difficult geological environment. The amendments have been adopted by the RF Ministry of Construction and will be put in force starting from August 5, 2017. Reducing the cost of constructing new and reconstructing the existing utility systems in karsted areas with the use ductile iron pipes is ensured by improving their life cycle, integrity, environmental safety and reducing water losses.

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№7|2018

SEWERAGE NETWORKS

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UDC 628.27

Vasilyev V. M., Morozov G. V., Zhukov S. V.

Problems in sewer network operation and ways of their elimination

Summary

The main problems arising during the operation of sewer networks – blockages, network deterioration and odors are highlighted. The causes of their occurrence are considered and methods of their elimination are proposed. Under the conditions of Russia blockages are most likely to occur as a result of errors in design and erection. These are violation of the pipe turnout grade, pipe diameter mismatch, turnout grade fault because of soil movement, unsatisfactory state of sewer and pipeline failure. Design and erection errors and low cultural level of the users of the sewer system can lead to the emission of high concentrations of hydrogen sulfide. Any blockage in the sewerage system is accompanied by foul odor above ground that is explained by the emission of hydrogen sulfide. By using advanced computer aids it is possible to keep account of all the factors that affect the useful life of sewers. Systematization of the obtained data and its further use provide for extending the pipe life and reduce the expenditures for renovation and maintenance of sewers. The paper is written on the basis of designing and operating the sewer networks in Saint-Petersburg.

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№6|2010

RESOURSES SAVING

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UDC 628.147.2

Emelin V. I., Azeev A. A.

Productivity of a Complex of Equipment for Trenchless Repair of Pipelines by Means of a Combined Sleeve Drawing

Summary

Methods of the determination of productivity of the complex of equipment for trenchless repair of pipelines by means of composite covering in the course of drawing the combined sleeve with due regard for influence of basic constructive and technological features is offered. Reserves of the productivity increase owing to enlargement of the bay’s length, combination of some operations, taking into account characteristics of covering and other factors are determined. Five conditions of the equally effective designing of details of the complex of equipment are formulated.

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№9|2012

PIPELINE NETWORK REHABILITATION

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UDC 628.143.004.67

Shaikhadinov А. А., Аvdeyev R. M., Kouznetsov A. V.

The efficiency of the equipment for trenchless repair of the pipelines

Summary

The impact of various parameters on the efficiency of the equipment set for trenchless pipeline repair is considered. A work tool is suggested that provides for the efficiency improvement by saving the efforts for its moving.

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