Piping systems

Interenergo LLC has extensive expertise in managing integrated pipeline supplies: to date, the total tonnage of projects implemented by the company exceeds 15,000 tonnes. Our products are applied in more than 50 major facilities, including 11 NPPs in the Russian Federation, the Republic of Belarus, Bulgaria, India and Bangladesh.

High, medium and low pressure pipelines are manufactured in accordance with Russian and foreign standards from seamless and welded pipes, sheet steel and steel forgings. The materials used are the customary carbon, low-alloy and stainless steel grades manufactured under GOST, TS, OST, DSTU, EN, DIN, ASTM and ASME standards, as well as specialised heat-resistant steels P91, P92 and their analogues.

In our work, we adhere to the principles of occupational health and safety, personnel health and safety, and environmental protection. The quality management system complies with the requirements of the ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018 standards.

Our suppliers’ production and welding equipment, operators and processes, as well as our own testing laboratory are certified for compliance with national and international standards and regulations, such as the Pressure Equipment Directive (PED) 2014/68/EU and German AD2000 standards, Technical Regulation TR TC 032/2013, standards EN10253-2, EN10253-4, ISO3834-2, SNT-TC-1A and ISO 9712, ISO 17025, Section IX of ASME BPVC, Indian Boiler Regulation (IBR), as well as PB 03-273-99, RDS 03-495-02, PNAE G-7-003-87, RD 03-615-03, PNAE G-7-010-89 and RD 03-614-03.

The company has already completed over 130 projects for customers in Russia and abroad.

Our advantages:

• End-to-end quality assurance system, professionalism and extensive expertise at all stages of project implementation, from development of design documentation to acceptance of equipment at the site
• Licences of the Federal Service for Environmental, Technological and Nuclear Supervision for constructing and operating nuclear power plant units
• Production processes, the quality management system and personnel certified in accordance with national and international standards
• Corporate testing and non-destructive testing laboratories
• Experience in manufacturing and supplying pipelines from heat-resistant steels P91 (10CrMoVNb9-1) and P92 (10CrMoVNb9-2), unique for Russia

Pipelines for NPPs

Interenergo LLC specialises in module deliveries for nuclear power plants, which helps minimise assembly and welding works on site.

Monitoring procedures applied to production of units for nuclear power facilities feature an advanced system of destructive and non-destructive testing, including use of certified stationary X-ray cameras produced by Comet Yxlon.

Considering the individual parameters of each facility and the non-serial nature of production, special attention is paid to assessing the qualifications and experience of design offices, as their work is an integral part of the production process.

Licence No. CO-(U)-02-101-11109 of 15 March 2019 for constructing nuclear power plant units, in particular for performing works and providing services to the operating organisation during NPP construction, and Licence No. CO-(U)-03-101-11108 of 15 March 2019 for performing works and providing services to the operating organisation during repair, reconstruction and modernisation of NPPs authorise Interenergo LLC to perform the following activities:

• hydraulic testing of pipelines and equipment,
• non-destructive testing of welded joints of pipelines and equipment,
• quality assurance of works,
• development of production and technological documentation for the above types of works, and
• all core technological operations, i.e. gas plasma cutting of pipes and rolled metal, bending, heat treatment, welding and control – these operations are automated and performed using state-of-the-art European equipment, which guarantees high performance and consistently high quality.

At every stage of the pipe manufacturing process we comply with the following norms, regulations, and standards:

• Federal norms and rules for atomic energy use:
  1. NP 001-15 ‘General safety provisions for nuclear power plants’
  2. PNAE G-7-008-89 ‘Rules of arrangement and safe operation of equipment and pipelines for nuclear facilities’
  3. NP-086-12 ‘Rules for arrangement and operation of actuating mechanisms of reactivity modification devices’
  4. NP-044-18 ‘Rules for arrangement and safe operation of pressure vessels for nuclear facilities’
  5. NP-045-18 ‘Rules for design and safe operation of steam and hot water pipelines for nuclear facilities’
  6. NP-068-05 ‘Piping armature for nuclear power plants. General engineering
  7. requirements’
  NP-071-18 ‘Federal rules and regulations in the field of nuclear energy use. Conformity assessment rules for products subject to statutory requirements related to safety in the field of atomic energy use, as well as the processes of its design (including survey), production, construction, installation, maintenance, operation, storage, transportation, realisation, disposal, and burial’
  8. GOST R 50.07.01-2017 ‘Conformity assessment system for use of nuclear energy’
• National standards:
  1. GOST 2.102-68 ‘Unified system for design documentation. Types and sets of design documents’
  2. GOST 2.106-96 ‘Unified system for design documentation. Textual documents’
  3. GOST 2.501-2013 ‘Unified system for design documentation. Registration and storage rules’
  4. GOST R 15.005-86 ‘System of product development and launching into manufacture. Development of single and small-scale production units assembled at the place of use’
  5. GOST R 15.201-2000 ‘System of product development and launching into manufacture. Products of industrial and technical designation. Procedure for product development and launching into manufacture’
• Guidelines, regulations and standards of the operating company:
  1. RD EO 1.1.2.01.0713-2019 ‘Regulation on conformity assessment in the form of acceptance and testing of products for nuclear power plants’
  2. POR 1.1.3.19.1870-2021 ‘Regulation on nonconformity management during manufacturing and entry control of products for nuclear power plants’
  3. RG 1.1.3.21.1705-2020 (including amendments 1-3) ‘Approval of technical requirements and decisions on employment of imported products intended for use at nuclear power plants’

Pipelines for TPPs

Interenergo LLC supplies and installs turbine and station pipelines for thermal generation facilities. Our company’s competitive advantage in supplying pipeline systems for CCPP and thermal power plants is the option to use P91 (10CrMoVNb9-1) and P92 (10CrMoVNb9-2) steels, which are utilised in construction of power units with combined cycle gas turbines.

Our products have been used to equip key Russian power facilities, including Nizhnevartovsk Power Station, Yuzhnouralsk-2 Power Station, Verkhniy Tagil Power Station and Perm Power Station.

The main product range comprises steam and hot water pipelines, including the following items:

• bent and sharp-bent pipes
• stamped, stamp-welded and drawn bends (elbows)
• stamped, forged, welded and extended T-joints
• fittings and manifolds
• stamped, stamp-welded and welded transitions
• flat plugs and stamped elliptical bottoms
• welded and flanged flow measuring devices
• various flanges and fasteners

Pipelines for oil & gas facilities

Interenergo LLC supplies pipelines for refineries, petrochemical and gas processing plants in the form of fittings, assembly units, and pipeline modules (blocks). Such modules consist of two or more fittings or straight pipe sections joined by welding in accordance with design documentation (block drawings).

The main product range includes the following items:

• assembly units (blocks)
• welded segmented elbows
• forged, welded and turned (formed) T-joints, Y-pieces
• welded, sheet, stamped and turned reducers/increasers
• fittings, fitting connections
• flanges
• caps and bottoms
• welded-in orifice plates, flange connections, leak restrainers
• other components

Boiler equipment

Turnkey supply of boiler equipment is one of the core business areas of Interenergo LLC. The company provides integrated engineering of boiler islands, including design, manufacturing, installation and commissioning. At further stages of the facilities’ operation, we provide warranty and post-warranty service of boiler units and boiler auxiliary systems.

The company’s technological solutions are based on the following types of boiler units:

• Tower-type boilers, including supercritical boilers running on solid, liquid and gaseous fuels;
• Traditional power boilers producing steam for steam turbines, with pressure and temperature of superheated steam varying from 1.2 MPa and 250°C to supercritical 28 MPa and 600-620°C;
• Hot water boilers and heat recovery steam generators (HRSGs) for supplying hot water and heating for industrial, residential and public buildings, as well as for heating heat line water at TPPs;
• HRSGs that operate as part of combined cycle plants or CCGT additions at existing TPPs, covering the entire range of available gas turbine capacities from 8 to 370 MW;
• Industrial boilers producing steam both for steam turbines and for process needs of the facility. Boilers of this kind use industrial low calorific gases as fuel, e.g. coke oven gas, blast furnace gas and converter gas from metallurgical plants, as well as sorted municipal solid waste, and gases from chemical and petrochemical industries.

Boiler auxiliary equipment designed and supplied by our company includes:

• fuel treatment and fuel supply systems
• combustion systems, including industrial furnaces and burner devices
• draught equipment
• water treatment systems
• fuel oil and/or gas systems
• plant control systems, instrumentation, automation and control systems
• flue gas cleaning systems
• flue gas heat recovery systems
• flues
• other boiler auxiliary equipment, available upon request

In order to achieve optimal performance, high efficiency, and minimal carbon footprint of industrial facilities, we use the best available technologies. Moreover, we co-operate with manufacturers of gas cleaning equipment and offer integrated solutions for boiler plants, including cleaning flue gas from emissions of harmful substances, e.g. NOx, SOx and CO, as well as particulate matter. We give due attention to both primary and secondary cleaning procedures, such as improving the combustion system and cleaning exhaust flue gases.

Depending on the type and composition of the burned fuel, we develop and select a customised set of measures aimed at cleaning flue gas to match the standard values. Here are some of the methods that are most frequently used at Interenergo’s projects:

• Selective catalytic reduction of NOx, one of the main methods of flue gas purification from nitrogen oxides. The process is based on the ability of ammonia to selectively reduce nitrogen oxides in the presence of a catalyst at 200-500°C.
• Use of electrostatic filters. The technology is based on electrification of dispersed phase particles suspended in the gas and their subsequent deposition on an electrode with a charge opposite to that of the contaminant particles.
• Integration of absorbers of flue gas desulphurisation plants. The underlying principle of this method is the reaction between sulphur dioxide SO2 and slaked lime Ca(OH)2 under humid conditions.
• Installation of bag filters. The most widely used variety is filters with a cylindrical bag, which collect dust with a 99–99.9% efficiency.

Gas treatment systems

Interenergo provides integrated gas treatment and compression solutions for the oil & gas and power generation industries. Our equipment is used to treat any type of gas: natural gas, flare gas, hydrogen gas, coal mine gas, shale gas, and biogas.

Since each type of gas has distinctive physical and chemical properties, gas treatment at different stages of its use varies and, therefore, is carried out taking into account its particular type, composition and application.

Gas of any kind must be rid of solid particles, its flow rate must be monitored, and the pressure and temperature must be increased or decreased depending on the consumer’s needs.

We implement projects of any complexity starting from connecting to the gas pipeline all the way to the end consumer, including integrated deliveries of all necessary equipment, such as:

• automatic gas distribution stations of high factory readiness
• gas treatment facilities
• commercial and technological gas metering units
• gas reduction units
• booster compressor stations
• closed cooling systems
• gas heaters
• emergency and shut-off valves

Interenergo LLC performs the following range of works related to implementation and management of projects in the gas treatment sector:

• engineering and development of design solutions
• production
• delivery
• assembly
• pre-commissioning
• testing
• maintenance and warranty service

As systems are put into operation, our specialists provide routine and emergency technical support, along with equipment maintenance, modernisation and reconstruction services, ensuring end-to-end assistance at all stages of the equipment’s lifecycle.

In partnership with leading Russian and foreign manufacturers, we deliver projects of any complexity using natural and petroleum gas treatment and processing plants, compressor equipment, gas treatment and booster compressor units supplying fuel gas to gas turbine plants, turboexpanders, refrigeration units, air separation equipment, nitrogen air stations, pumping equipment, gas regulators and automated control systems.

Key services for gas treatment systems

Gas treatment units

Integrated multifunctional units are designed for pre-treating gas before it is supplied to gas equipment, i.e. gas turbines, gas piston units, compressor stations, boiler houses and gas pumping units.

Applications:

• Capturing liquid discharges
• Filtering gas from solid particles and the liquid fraction
• Gas reduction and heating
• Dampening pulsations in the gas mixture
• Commercial or technological gas metering

Booster compressor stations

Booster compressor stations are sets of equipment and systems designed for increasing gas pressure during its extraction, transportation and storage; they have a wide range of applications in the energy sector, as well as in oil & gas.

Applications:

• Channelling gas to gas turbine plants
• Channelling gas to gas piston generators
• Supplying fuel for turbines on test benches
• Treating, compressing and pressurising gas during production, transportation and storage
• Treating flare gas to be used as fuel at power supply centres for the fields’ own needs
• Pumping flare gas into reservoirs to increase oil production