Connection to storm drainage networks. Technical requirements for wedge type valves used at the facilities of JSC Mosvodokanal Technical requirements of Mosvodokanal for design

TECHNICAL REQUIREMENTS FOR THE APPLICATION OF PIPES AND MATERIALS

1. Technical requirements on the use of pipes and materials for the construction and reconstruction of drinking water supply pipelines at JSC facilities" Mosvodokanal "

GENERAL TERMS

selection of pipes and materials for the construction and reconstruction of water supply pipelines

at the facilities of Mosvodokanal JSC
1. At the design stage, depending on the laying conditions and the method of work, the material and type of pipe are selected (pipe wall thickness, standard dimensional ratio (SDR), ring stiffness (SN), the presence of external and internal protective coating of the pipe), the issue of strengthening the laid pipe is resolved. pipes using a reinforced concrete clip or steel case. For all pipe materials, it is necessary to carry out a strength calculation on the influence of internal pressure of the working environment, soil pressure, temporary loads, the own mass of the pipes and the mass of the transported liquid, atmospheric pressure during the formation of a vacuum and external hydrostatic pressure of groundwater, determination of the axial pulling force (punching).

2. Before choosing a reconstruction method, technical diagnostics of the pipeline are carried out in order to determine its condition and residual life.

3. The choice of pipeline material must be justified by comparative technical and economic calculations. The calculation is carried out taking into account the requirements of Mosvodokanal JSC. When crossing with existing utilities or locating the pipeline in their security zone, the requirements of third-party operating organizations are taken into account. A feasibility study and strength calculations of the pipeline are included in the design and estimate documentation and are presented when considering the project.

4. All materials used for laying water supply networks (pipes, thin-walled liners, hoses and internal spray coatings) must undergo additional testing for the general toxic effect of constituent components that can diffuse into water in concentrations hazardous to public health and lead to allergenic, skin-related irritating, mutagenic and other negative effects on humans.

5. When laying polyethylene pipes without reinforced concrete casing or steel casing in urbanized and industrial areas, the environmental safety of the surrounding soil along the design route must be confirmed. If there are unacceptable contaminants in the soil and groundwater (aromatic hydrocarbons, organic chemicals, etc.), soil reclamation is carried out.

6. Steel pipes that were not previously used for drinking water supply pipelines are not allowed for the installation of water bypasses.

7. Restored previously used steel pipes are not allowed for new installation and reconstruction of water pipelines (pipes for the working environment). They can be used to make cases.

8. Steel spiral-welded pipes (according to GOST 20295-85 with volumetric heat treatment) can be used when constructing cases and bypass lines.

9. When laying pipes in cases, the interpipe space is backfilled with cement-sand mortar.

10. During the new construction of open steel water supply pipelines (without steel cases and reinforced concrete clips), if necessary, provide for simultaneous protection of the pipe from electrochemical corrosion in accordance with GOST 9.602-2005.

11. When reconstructing steel pipelines (without steel casings and reinforced concrete cages) without destroying the existing pipe and when promptly restoring local and emergency sections of pipelines using methods that do not have load-bearing capacity, provide, if necessary, for simultaneous protection of the pipe from electrochemical corrosion in accordance with GOST 9.602 -2005.

12. It is allowed to use cast shaped parts made of ductile iron with internal and external epoxy powder coating, approved for use in drinking water supply systems (certificate of state registration, expert opinion on product compliance with the Unified Sanitary-Epidemiological and Hygienic Requirements for Goods Subject to Sanitary-Epidemiological supervision).

13. Specialists of Mosvodokanal JSC have the right to visit factories supplying pipes and get acquainted with the conditions for organizing production and quality control of products, as well as inspect the supplied products.

14. Tests of polyethylene pipes are carried out on samples made from pipes.

14.1. The characteristics of the pipe material must correspond to the following values:

Thermal stability at 200 o C – at least 20 minutes;

Mass fraction of carbon black (soot) – 2.0-2.5%;

Distribution of carbon black (soot) or pigment – ​​type I-II;

Relative elongation at break of a pipe sample is not less than 350%.

14.2. When checking a weld, failure of the sample should occur when the relative elongation reaches more than 50% and be characterized by high ductility. The break line must run along the base material and not intersect the welding plane. The test results are considered positive if, during the axial tensile test, at least 80% of the samples have a plastic type I fracture. The remaining 20% ​​of the samples may have a type II fracture pattern. Type III failure is not allowed.

for the construction and reconstruction of sewerage systems at the facilities of JSC Mosvodokanal

JOINT-STOCK COMPANY

"Mosvodokanal"

TECHNICAL REQUIREMENTS

to the design of water supply and sanitation facilities in Moscow during new construction and reconstruction

Moscow, 2016
CONTENT

I. GENERAL REQUIREMENTS

TO THE DESIGN OF PIPELINES AND STRUCTURES

WATER SUPPLY AND WATER DISPOSAL

1. These requirements are applied to the development of technical solutions when designing water supply and sanitation facilities.

2. Design solutions are developed taking into account regulatory requirements
but-technical documents (Resolutions of the Moscow Government, GOST, SP, SNiP, MGSN, etc.), approved standard albums and requirements of the operating organization JSC Mosvodokanal.

3. Design solutions are carried out in full accordance with the issued technical conditions (TS) and design assignments (TOR).

4. If the specifications (TOR) provide for construction stages, projects may be carried out in stages.

5. When designing water supply and sewerage systems for complex developments or objects with large water consumption and large volumes of wastewater, as well as transport highways, Schemes are developed, on the basis of which Mosvodokanal JSC issues technical specifications.

6. For consideration, Mosvodokanal JSC accepts design documentation in the amount of 2 copies (water supply), 2 copies (electrical protection), 3 copies (gravity sewerage), 4 copies (gravity-pressure sewerage), approved by all performers indicated in the project stamp.

II. WATER SUPPLY

1. COMPOSITION OF DESIGN DOCUMENTATION

Project documentation should include:

1 .1. For highways and networks:

Explanatory note (including the composition of the project);

Engineering-geological conclusion;

Situation plan M 1:2000 with the design of structures;

Detailing with specification;

Longitudinal profile M 1:100 (vertical) / M 1:500 or 1:200 (horizontal) with geological section;

Constructive drawings of individual chambers, wells, stops, etc.

1. 2. For inputs and on-site networks:

Common data;

Geodetic plan M 1:500 (1:200) – a consolidated plan of networks with landscaping elements;

Situation plan M 1:2000;

Detailing with specification;

Profile M 1:100/M 1:500 (1:200);

Floor plan, placement and diagram of the water metering unit;

Plan, diagram of the central heating point, ITP, UATP with the arrangement of water metering units;

Structural drawings of individual wells, stops, etc.

2. REQUIREMENTS TODESIGN DOCUMENTATION

2.1. Sheet "general data" (for house inputs) should include:

• 
  list of main sets of working drawings;
• 
  list of working drawings of the main set;
• 
  list of attached and reference documents;
• 
  symbols adopted on the general plan;
• 
  section "general instructions";
• 
  engineering-geological conclusion;

JOINT-STOCK COMPANY

"Mosvodokanal"

TECHNICAL REQUIREMENTS

to the design of water supply and sanitation facilities in Moscow during new construction and reconstruction

Moscow, 2016
CONTENT

I. GENERAL REQUIREMENTS

TO THE DESIGN OF PIPELINES AND STRUCTURES

WATER SUPPLY AND WATER DISPOSAL

1. These requirements are applied to the development of technical solutions when designing water supply and sanitation facilities.

2. Design solutions are developed taking into account regulatory requirements
but-technical documents (Resolutions of the Moscow Government, GOST, SP, SNiP, MGSN, etc.), approved standard albums and requirements of the operating organization JSC Mosvodokanal.

3. Design solutions are carried out in full accordance with the issued technical conditions (TS) and design assignments (TOR).

4. If the specifications (TOR) provide for construction stages, projects may be carried out in stages.

5. When designing water supply and sewerage systems for complex developments or objects with large water consumption and large volumes of wastewater, as well as transport highways, Schemes are developed, on the basis of which Mosvodokanal JSC issues technical specifications.

6. For consideration, Mosvodokanal JSC accepts design documentation in the amount of 2 copies (water supply), 2 copies (electrical protection), 3 copies (gravity sewerage), 4 copies (gravity-pressure sewerage), approved by all performers indicated in the project stamp.

II. WATER SUPPLY

1. COMPOSITION OF DESIGN DOCUMENTATION

Project documentation should include:

1 .1. For highways and networks:

Explanatory note (including the composition of the project);

Engineering-geological conclusion;

Situation plan M 1:2000 with the design of structures;

Detailing with specification;

Longitudinal profile M 1:100 (vertical) / M 1:500 or 1:200 (horizontal) with geological section;

Constructive drawings of individual chambers, wells, stops, etc.

1. 2. For inputs and on-site networks:

Common data;

Geodetic plan M 1:500 (1:200) – a consolidated plan of networks with landscaping elements;

Situation plan M 1:2000;

Detailing with specification;

Profile M 1:100/M 1:500 (1:200);

Floor plan, placement and diagram of the water metering unit;

Plan, diagram of the central heating point, ITP, UATP with the arrangement of water metering units;

Structural drawings of individual wells, stops, etc.

2. REQUIREMENTS TODESIGN DOCUMENTATION

2.1. Sheet "general data" (for house inputs) should include:

• 
  list of main sets of working drawings;
• 
  list of working drawings of the main set;
• 
  list of attached and reference documents;
• 
  symbols adopted on the general plan;
• 
  section "general instructions";
• 
  engineering-geological conclusion;

Mosvodokanal is one of the most demanding water utilities in Russia. It is one of the first to introduce new technologies and high demands on the quality of the materials and equipment used, which it accepts on its balance sheet. High requirements for water quality and pipeline service life force Mosvodokanal to tighten its requirements for introducing materials and equipment into project documentation. Only reliability and only high quality.
In this publication, we will tell you what requirements Mosvodokanal puts forward for pipeline shut-off valves, namely, for cast iron valves with a non-retractable spindle and a rubber-coated wedge, used in Moscow water supply networks. Our company has extensive experience in cooperation with developers in the Moscow region. Since 2001, we have been following all trends and changes. We carry out a strict selection of the products offered in our assortment list. The valves supplied by our company fully comply with all the stated requirements of Mosvodokanal. The entire range can be found in the catalog section, or by requesting information from our managers by phone or by mail.

We invite you to familiarize yourself with an excerpt from the Technical Requirements of Mosvodokanal dedicated to cast iron valves:

They are used as a shut-off device on pipelines to block the flow of the working medium.

1. Classification, main parameters valves used in drinking and technical water supply networks, or installed on pipelines transporting wastewater, must comply with the requirements of GOST 5762-2002:

Gate type: wedge, the design of which, when fully open, should not reduce the flow area of ​​the gate valve;

Spindle type: non-retractable;

Type of seal of moving elements (spindle seal):

• O-rings (seals) made of EPDM elastomer (water drinking quality) or NBR (waste and process water) – for valves with rubber wedge;
• PTFE seal (stuffing box) as a basic option or O-rings (stuffing boxes) made of elastomer (EPDM and NBR) upon customer request – for valves with wedge/body seal – metal/metal.

Flange seal type: EPDM (for drinking water), NBR (for sewerage).

The degree of tightness of the shut-off valves must correspond to class A according to GOST 9544-2015 and be reflected in the questionnaire;

Type of connection to the pipeline: flange. The design, dimensions and general technical requirements for flanges must comply with GOST 33259-2015. Supply of counter flanges is carried out at the customer's request. Also, at the customer's request during justification, valves for welding, with coupling, trunnion, or fitting connections are supplied;

Type of design of the flow part of the body: full bore section;

Drive type: with manual control, with electric drive (delivery of drives at the customer’s request), with hydraulic drive or pneumatic drive (at the customer’s request upon justification);

The maximum torque on the valve flywheel is not more than M max = 1xD y (N m);

Installation position of the valve: horizontal on a vertical pipeline, vertical with the drive up on a horizontal pipeline;

The distinctive color is blue-blue.

The manually operated gate valve is supplied complete with a steering wheel (please indicate in the questionnaire).

Type of main connector "body - cover": bolted or solid body design.

1. Conditional passages(nominal dimensions) DN - according to GOST 28338-89. The flow area must correspond to DN.
2. Nominal pressures - PN2.5 kgf/cm2, PN10 kgf/cm2, PN 16 kgf/cm2 according to GOST 26349-84.
3. Security requirements– according to GOST 12.2.063-2015 and “Technical Regulations on the Safety of Machinery and Equipment” TR TS 010/2011, approved by Government Decree Russian Federation dated October 18, 2011 No. 823.
4. Construction length of the hull:

Wide – row 1 according to GOST 3706-93, series 15 according to EN558.

Medium - row 2 according to GOST 3706-93, series 3 according to EN 558.

Narrow - row 3 according to GOST 3706-93, series 14 according to EN 558.

1. Accommodation categories: open air, chambers and wells with high humidity, in the ground, in enclosed spaces (nominal values ​​of climatic factors according to GOST 15150 for UHL 5 conditions, at ambient temperatures from 0 to 40 o C). At the customer's request, a valve with an electric drive (hydraulic drive, pneumatic drive) with a maximum moisture and dust protection rating of IP68 is supplied. The valves can be ordered in a version for non-drain installation.
2. Working environment: drinking water, process water, sewage.
3. Body and cover material– high-strength cast iron with nodular graphite ductile iron(grades not lower than VCh-40 according to GOST 7293-85), other material (at the customer’s request upon justification).
4. Wedge material– high-strength cast iron with nodular graphite VChShG (not lower than VCh-40 according to GOST 7293-85). For potable water and industrial water, the wedge should be covered with a vulcanized EPDM elastomer (with the appropriate sanitary and epidemiological permits). For domestic wastewater, use a wedge/body seal – metal/metal, metal seal material – bronze/bronze, stainless steel/stainless steel).
5. Spindle material- stainless steel. Spindle nut: for drinking water - brass or bronze, for domestic waste water - bronze, grade not lower than BrAZh9-4 (specify in the questionnaire).
6. Anti-corrosion coating housings and covers (internal and external), eliminating corrosion during the entire service life of the product. Coating characteristics: epoxy powder coating, layer thickness of at least 250 microns, absence of pores, high adhesion to metal (at least 12N/mm2), smooth surface (enamel coating of the body and lid can be provided when justifying the order).
7. Hardware products(bolts, nuts, washers, studs) – carbon steel with thermal diffusion zinc coating, stainless steel.
8. Marking on the product must comply with the requirements of GOST 4666-2015 and contain the following information: name of the product and (or) designation of the series or type, serial number of the product, name of the manufacturer and (or) its registered trademark, case material, nominal operating pressure, nominal diameter, date of manufacture, compliance standard number. The marking is applied by casting to the front and/or back side housings. It is allowed to put some information on a plate securely attached to the body. Signs are not allowed on the tag. All markings must be repeated and explained in the operating documentation for the valve.

At the customer's request, indicate on the steering wheel an arrow with the direction of closing and opening the valve.

1. Packaging, transportation and storage. The packaging must ensure the safety of the valves during transportation and storage. Transport vehicles - boxes in accordance with GOST 2991, GOST 9142, GOST 10198. Marking of transport containers - in accordance with GOST 14192. Conditions for transportation and storage of valves in accordance with GOST 15150. Method of fastening valves in vehicle- at the discretion of the manufacturer. Valves are transported by all types of transport in accordance with the rules of cargo transportation. In this case, the manufacturer or supplier must provide installation and fastening that eliminates the possibility of mechanical damage and contamination of the internal surfaces of the valves and sealing surfaces of the flanges. It is allowed to transport valves in packages in accordance with GOST 26663. It is allowed to transport valves with the mating flanges removed, placing them together with fasteners in a common container with the valve. The actuator must be installed on the valve and adjusted at the factory.
2. Life time valves - at least 50 years.
3. Warranty period valves 10 years or 2500 opening/closing cycles (for valves with electric drive, hydraulic drive, pneumatic drive) and 250 opening/closing cycles (for manually operated valves) without maintenance. Confirmation of warranty - provision of a letter of guarantee from the manufacturer signed by an authorized person and stamped by the manufacturer.
4. The quality control system of the manufacturing enterprise must be certified according to the QMS ISO 9001 in relation to the production of the supplied products, for which the manufacturer must submit a certificate from an accredited organization indicating the exact name of the plant and its address. Serially produced valves must undergo acceptance, periodic, qualification, certification, and type tests at the manufacturing plant in accordance with GOST R 53402-2009 "Pipeline fittings. Methods of control and testing." For foreign-made wedge valves, the supplier must provide factory test reports with a list of serial numbers of the supplied products.
5. A domestic or foreign-made engine must have a certificate of conformity, a sanitary and hygienic conclusion or a certificate of state registration and an expert opinion on the product’s compliance with the uniform sanitary, epidemiological and hygienic requirements for goods.
6. The slider and components must be accompanied by a passport, technical description and operating instructions in Russian. The information on the label is repeated and explained in the instructions. In addition, the instructions specify requirements for ensuring the safety of equipment
   during transportation and storage, for packaging, for preservation.
7. Before the start of bidding, the offered products must undergo preliminary incoming inspection to assess their quality for compliance with the technical requirements of Mosvodokanal JSC.

Potential bidders must provide:

• passport details with technical characteristics, drawings of a general view of the product indicating the full configuration and list of materials used in the design (for foreign-made goods in Russian);
• certificates of conformity, sanitary and hygienic conclusions or certificate of state registration and expert opinion on compliance

products to uniform sanitary-epidemiological and hygienic requirements for goods;

• a letter from the manufacturer confirming the warranty period and service life of the fittings in accordance with paragraphs. 15 and 16 technical requirements (for foreign-made goods in Russian);
• for foreign-made goods, certificates of compliance with international standards issued by accredited independent organizations in accordance with clauses 17, 18 of the Technical Requirements;
• for goods of foreign or non-own production, authorization of a potential tender participant from the manufacturer for the supply of goods (certificate of a dealer, official representative or other authority);
• The Customer's specialists have the right to visit factories and familiarize themselves with the conditions for organizing production and quality control of products.

1. By prior agreement, it is possible to conduct an on-site inspection of the manufacturing plant, carried out by specialists from Mosvodokanal JSC, to determine the possibility of manufacturing high-quality products that meet technical requirements.
2. Valves installed on pipelines of chemical reagents, aeration systems, etc., at the customer’s request, are made of other materials that are resistant to the media used (as reflected in the questionnaire).

In 2012, at Mosvodokanal JSC, in order to ensure the safe operation of hatches, unification of ordered products when new installation or replacement, it was decided to stop purchasing gray cast iron hatches and switch to installing ductile iron hatches that meet the requirements approved by the water utility. Considering the volume of demand for high-quality hatches, the task was set to develop an optimal original design and further mass production of ductile iron hatches that can withstand a load of 40 tons.

After studying the regulatory and technical documentation, aspects of production, implementation, design, installation of hatches, accumulated domestic and foreign experience, five batches of the best samples of hatches (50 pieces in total) from different global manufacturers with different design features. The hatches were subjected to comparative tests for compliance with regulatory and technical documentation and declared characteristics. Then the purchased hatches were tested under real operating conditions.

The work carried out made it possible to develop the technical requirements of Mosvodokanal JSC for a new hatch model. Prototypes of the model were manufactured and its technical and operational tests were carried out.

Based on the innovative research and production work carried out, specialists from Mosvodokanal JSC developed technical requirements for heavy main manholes for wells of water supply and sewerage networks. The design is different increased level safety during traffic on city roads and highways at any intensity and speed of traffic flow. The service life of metal structure elements is determined to be at least 50 years.

Specialists from Mosvodokanal JSC proposed a new name for manholes - support-cover element OUE-600 (when installed on the neck of a well) and OUE-SM-600 (with a “floating” type body of a self-supporting structure supported on the road surface).

OUE-600 with housing regular type, resting on the well neck (or additional rings), are intended for installation in urban areas without asphalt pavement, in areas covered with paving stones or paving slabs (when installed on the roadway, courtyard areas, in areas of pedestrian paths, sidewalks, in green areas plantings). It is possible to produce round and square shapes of the upper part of the body.

OUE-SM-600 with a “floating” body of a self-supporting structure supported on the road surface, designed for installation in urban areas with asphalt pavement (when installed on the roadway of urban roads, in parking lots, courtyard areas, sidewalks, pedestrian paths). Supporting and covering elements can be of two types depending on the height of the body: 140 and 200 mm.

The use of a “floating” casing makes it possible to reduce the specific load on the reinforced concrete structure of the well by 85%, i.e. the well structure will take on only 15% of the load that was created when using a conventional flange body, the remaining 85% will be evenly redistributed over the general surface of the roadway. Another important advantage of hatches with a “floating” body is that during its installation the body itself is pressed into the asphalt surface. The “floating” design of the hatch does not protrude above the road, but “breathes” along with road surface. This allows you to maintain the quality of the road surface and ensure a constant stable position of the hatch in line with the road surface, regardless of various temperature fluctuations and loads. OUE-SM-600 is ideal for replacing old hatches with new ones due to its fairly simple and in a fast way installation, ensuring a stable position of the hatch in line with the road surface.

Technical requirements for supporting and covering elements are included as an appendix to the approved “Technical requirements of JSC Mosvodokanal for the design of water supply and sanitation facilities in Moscow during new construction and reconstruction.”

Work on the production of the first model of the domestic support-covering element was carried out at the Tyazhpressmash plant in Ryazan. OUEs are produced from high-strength nodular cast iron (ductile iron) and comply with the requirements of GOST 3634-99 and the European standard EN 124. Serial production of OUE-600 and OUE-SM-600, which meet the technical requirements of Mosvodokanal JSC, has currently been mastered at several Russian enterprises, which made it possible to significantly reduce their initial cost.