High-pressure pipeline systems
Working documentation: from 22 days
Price from 50000 roubles
A pipeline rupture under operating pressure above 1,6 MPa is not just an accident, it is a shutdown of production, environmental pollution and criminal liability for violating industrial safety requirements. High-pressure pipeline systems operate under extreme conditions: aggressive environments, cyclic loads, water hammer, extreme temperatures - and designer error has no right to exist here. AYU-Project develops design and working documentation for high-pressure pipeline systems for industrial enterprises, water supply facilities, oil and gas, chemical and food industries - with strength calculations, protection against water hammer, selection of fittings and compensators for specific operating parameters. SRO approval, standard control, fixed contract price and free edits based on expert comments - the AYU-Project standard of work at all stages.
What is involved in the design of high-pressure piping systems?
The design of high-pressure pipeline systems covers the design documentation and working documentation stages and includes technological, construction, mechanical and automated solutions - from calculating operating pressure and pipe wall thickness to water hammer protection schemes and detailed drawings of compensators.
Design documentation stage includes:
- explanatory note justifying the technical decisions taken: operating and design pressure, medium temperature, pipeline category according to GOST 32569-2013 And TR TS 032/2013;
- schematic flow diagram of the pipeline system (P1/P2) indicating connection points, shut-off and control valves, instrumentation;
- strength calculations: pipeline wall thickness, permissible stresses, choice of steel class (welded, seamless pipes according to GOST 8731, GOST 8732, GOST 10705);
- calculation of compensation for thermal expansion and justification of the type of compensators (bellows, lens, U-shaped);
- justification for protecting the system from water hammer: hydraulic accumulators, pressure relief valves, throttle washers;
- diagram of a pressure boosting pumping station with justification for the choice of pumping units;
- assignments to related sections: KM (supporting structures), EOM (power supply for electric drives), automation and telemechanics (automation and pressure control).
The WD Stage Includes:
- working drawings of pipelines: plans, sections, sections with reference to the axes of the building and structures (grade TX according to GOST 21.401-88);
- installation diagram of connections (isometric) indicating diameters, wall thicknesses, slopes, drainage points and vents;
- detail drawings of pipeline blocks, expansion joints, supporting structures;
- list of pipelines indicating the working environment, pressure, temperature, category, material and standard sizes;
- specifications of equipment, fittings, pipes, fittings and insulating materials;
- calculation of hydraulic losses in the network with selection of diameters of pipelines and pumping units;
- scheme and program of hydraulic tests for strength and density;
- statement of quantities.
Comparison of pipeline categories by operating parameters
| Category | Pressure, MPa | Ambient temperature, °C | Typical facilities |
|---|---|---|---|
| I | over 10,0 | over 450 | Energy, high pressure boiler houses |
| II | 2,5 - 10,0 | 300 - 450 | Petrochemicals, steam pipelines |
| III | 1,6 - 2,5 | to 300 | Industrial water pipelines, heating networks |
| IV | up to 1,6 | to 250 | Public water supply, HVAC |
| V | any | any | Others, according to individual calculation |
Classification by GOST 32569-2013 And TR TS 032/2013.
What types of high-pressure piping systems does AYU-Project design?
AYU-Project designs pipeline systems for a wide range of media and operating pressures - from drinking water supply pipelines with pressures up to 2,5 MPa to process pipelines for petrochemical plants with design pressures up to 32 MPa.
- External high pressure water pipes. Supply and distribution pipelines of centralized water supply systems of the second and third rise, transit water pipelines between pumping stations. Designed in accordance with SP 31.13330.2021 (updating SNiP 2.04.02-84) and SP 129.13330.2019. Materials - steel pipes with external and internal insulation, high-strength cast iron (VChShG), fiberglass for aggressive environments.
- Technological pipelines of industrial enterprises. Pipelines for transporting water, steam, process liquids, gases at chemical, oil refining, food and energy industry facilities. The main standard is GOST 32569-2013. The pipeline category, environment group and type of welded joints determine the requirements for material and installation quality control.
- Field pipelines. Systems for transporting produced media at oil and gas production facilities, including water pipelines for reservoir pressure maintenance (RPM) systems. Designed according to GOST R 55990-2014 taking into account operating pressure, medium composition and route topography.
- Fire-fighting high-pressure water pipes. External and internal fire-fighting water supply systems with booster pumping stations, where the pressure in the network exceeds 0.45 MPa. Designed together with sections IFWS and NPV.
How is a high-pressure pipeline calculated?
The calculation of a high-pressure pipeline includes three mandatory stages: calculation of static strength, analysis of compensation for thermal expansion and calculation of water hammer. Skipping any of them leads to system failure.
Calculation of strength and selection of wall thickness
The thickness of the pipe wall is determined from the condition of strength under the influence of internal pressure, taking into account an increase for corrosion, erosion and a minus tolerance for sheet thickness. The maximum operating pressure under normal process conditions is taken as the design pressure; for steam pipelines from steam generators - according to GOST 32569-2013 - nominal pressure at the outlet of the superheater. A short-term excess of the design pressure is allowed when the safety valve is activated within the limits of 10%.
AYU-Project engineers perform calculations in specialized software with verification using analytical formulas; the results are drawn up as an appendix to the explanatory note of the DD and submitted to the normative inspector for verification.
Water hammer protection: what is being designed?
Water hammer in a high-pressure system can create pressure in a split second that is tens of times higher than the working pressure, which leads to rupture of the pipeline or fittings. AYU-Project calculates water hammer pressure and designs a protection system that includes:
- hydraulic accumulators (hydraulic air boilers) to dampen pressure waves;
- water hammer compensators (dampers) in critical areas;
- Automatically controlled pressure relief valves;
- throttle washers to limit the rate of pressure build-up;
- Variable frequency drives of pumps for smooth start and stop.
Compensation of thermal expansions
The thermal elongation of a steel pipeline with a diameter of 300 mm in a section of 100 m with a temperature difference of 100°C is about 120 mm - without compensation, this creates stresses that destroy supports and flange connections. AYU-Project selects the type of compensator (axial bellows, U-shaped, lens) and calculates its parameters based on the amount of thermal expansion, operating pressure and permissible force on supporting structures.
Design specifics for certain types of objects
Industrial enterprises: explosive and aggressive environments
At petrochemical, gas and chemical industry facilities, high-pressure pipelines transport explosive, fire-hazardous and toxic environments of groups A and B according to GOST 32569-2013. This imposes additional requirements on the material of pipes (alloy and high-alloy steels, austenitic stainless steels), the type of welded joints (only butt joints with full penetration), the scope of non-destructive testing (100% radiographic or ultrasonic testing for category I) and the design of the fittings (explosion-proof, with remote control).
AYU-Project coordinates technical solutions with Rostekhnadzor when designing objects subject to Federal Law No. 116-FZ “On Industrial Safety of Hazardous Production Facilities”.
Water supply facilities: transit water pipelines and pumping stations
For transit water pipelines of centralized water supply systems, the key design tasks are the choice of pipe material taking into account the aggressiveness of soil and water, the calculation of water hammer pressure when starting and stopping pumping units, and the design of pressure regulators at relief breaks. AYU-Project also designs second lift pumping stations with frequency control equipment that ensures the maintenance of constant pressure in the network with variable water consumption.
Typical mistakes when designing high-pressure pipelines
Most accidents on high-pressure pipelines occur not due to random equipment failures, but due to errors inherent at the DD or WD stage.
- Underestimation of water hammer. The calculation is performed only for static pressure; Transient modes (start, stop, emergency closure of valves) are not modeled. The result is a rupture of the pipeline during the first regular shutdown of the pump.
- Incorrect selection of pipeline category. Downgrading leads to the use of pipes with insufficient wall thickness and inadequate inspection of welds - a direct violation GOST 32569-2013.
- No compensation for thermal expansion. It is especially critical for steam pipelines and hot water pipelines with an ambient temperature above 100°C.
- Incorrect selection of pressure fittings. The use of fittings with a nominal pressure PN lower than the calculated one is a direct violation TR TS 032/2013 And GOST 356-80. A similar error often occurs when copying a specification from a standard project without recalculating it to the specific parameters of the object.
- Ignoring corrosion allowance. For pipelines with aggressive media, the calculated wall thickness without an increase for corrosion is initially underestimated; over 5-7 years of operation, the wall thins to a critical point.
- Errors in the placement of supporting structures. The absence of fixed supports at the “anchor” points when installing compensators leads to axial displacements, depressurization of flange connections and destruction of equipment pipes.
Standard control in AYU-Project checks each of these parameters at the internal approval stage before transferring the documentation to the customer or for examination.
Why choose AYU-Project for designing high-pressure piping systems?
AYU-Project provides a full engineering cycle - from process diagram to installation drawings and expert review support - with a guarantee of compliance with current requirements TR TS 032/2013, GOST 32569-2013 and industry codes of practice.
- SRO Authorization for the design of industrial and civil construction facilities, including technological pipelines of hazardous production facilities.
- Fixed contract price - the cost is not revised; all iterations based on the comments of the examination and Rostechnadzor are included in the initial budget.
- Free Revisions in Response to Expert Review Comments - AYU-Project eliminates comments from state and independent expert review procedures without additional bills.
- Standard control - the documentation undergoes internal verification for compliance with the current editions of GOST, SP and technical regulations before being transferred to the customer.
- Integrated approach - AYU-Project simultaneously manages the technological section, KM (supporting structures), EOM (power supply for valve drives) and ATM (pressure automation), eliminating contradictions between sections.
- Experience Across Projects of Various Scales - from local high-pressure water pipelines to branched technological pipeline systems of industrial enterprises with environmental pressure up to 32 MPa.
What standards govern the design of high-pressure pipeline systems?
The regulatory framework covers technical regulations EAEU, interstate standards, codes of practice and industry documents - depending on the type of medium, pressure and purpose of the pipeline. Compliance with the entire regulatory vertical is mandatory when undergoing state expert review and inspections by Rostechnadzor.
- Technical Regulations of the Customs Union TR CU 032/2013 “On the safety of equipment operating under excess pressure” - fundamental document for pipelines with pressure above 0,05 MPa; specifies requirements for design, materials, welding and testing.
- GOST 32569-2013 “Technological steel pipelines. Requirements for design and operation in explosion-, fire- and chemically hazardous industries" - classification by category, requirements for strength calculations, welded joints and quality control.
- GOST R 55990-2014 “Oil and gas-oil fields. Field pipelines. Design standards" - for pipelines of oil and gas production systems, including water pressure pipelines.
- SP 31.13330.2021 “Water supply. External networks and structures" (updating SNiP 2.04.02-84) - design of water pipelines and pumping stations for centralized water supply systems.
- SP 129.13330.2019 “External networks and structures of water supply and sewerage” - construction and reconstruction of external pipeline networks.
- GOST 21.401-88 “SPDS. Production technology. Basic requirements for working drawings" - preparation of working documentation for process pipelines (brand process solutions).
- GOST R 21.1101-2020 “SPDS. Basic requirements for design and working documentation" - composition and rules for drawing up design documentation and working documentation.
- GOST 356-80 “Fittings and pipeline parts. Nominal, test and working pressures" - selection of fittings based on nominal pressure PN, taking into account the medium temperature.
- GOST 8731-74, GOST 8732-78 - seamless hot-deformed steel pipes for high-pressure systems.
- GOST 10705-80 - electric-welded steel pipes; Applications with pressure and medium restrictions.
- Government Decree of the Russian Federation No. 87 dated 16.02.2008 (ed. 2022) - composition of DD sections, including technological and design sections.
- Federal Law No. 116-FZ “On Industrial Safety of Hazardous Production Facilities” (ed. 2023) - requirements for the design of pipelines for hazardous production facility with registration in Rostechnadzor.
Cost and terms of design of high-pressure pipeline systems
The cost and development time of design documentation and working documentation are determined by a combination of factors specific to this class of objects: pipeline category according to GOST 32569-2013 (I-V) and the scope of mandatory strength calculations, the type and aggressiveness of the transported medium (water, steam, oil products, chemicals of groups A and B), the length and ramification of the system, the need to calculate water hammer and design a system for its damping, the complexity of the pumping station and the presence of variable-frequency drives, as well as the requirement for coordination with Rostekhnadzor at the stage of industrial safety examination. Approximate calculation - through the online calculator on the website.
To receive an accurate commercial proposal, please indicate in your application: the type and parameters of the transported medium (pressure, temperature, chemical composition), the category of the pipeline or the purpose of the facility, the length and diameter of the pipeline system, the design stage (DD, WD or DD+WD), as well as the availability of initial technological documentation or technical specifications. The initial consultation is free, and we work across Russia remotely.
How to order the design of high-pressure pipeline systems from AYU-Project?
- Application Submission
Fill out the form on the website or contact by phone. Indicate the type of object, the transported medium, operating pressure and approximate pipeline diameters. If there is a technological task or initial data, attach them immediately. - Initial consultation and terms of reference
Engineer AYU-Project clarifies the system parameters, determines the category of the pipeline according to GOST 32569-2013, the need to calculate water hammer and a list of related sections. Based on the consultation, a technical specification is formed. Consultation is free. - Commercial Proposal and Contract
AYU-Project prepares a proposal with a fixed cost and indicating the composition of the documentation by stages. After approval, an agreement is signed with clearly defined deadlines and a list of sections to be developed. - Design Documentation (DD) Development
AYU-Project engineers perform strength calculations, compensation for thermal expansion and water hammer, develop basic technological diagrams, design a pumping station and a water hammer protection system. Interim versions are agreed upon with the customer. - Expert review support and Rostechnadzor
AYU-Project accompanies DD in state or independent expert review, and, if necessary, in the industrial safety examination of Rostechnadzor. Comments will be corrected without additional payment. - Working Documentation (WD) Development
After receiving a positive expert opinion, AYU-Project develops installation drawings of pipelines, detailing of expansion joints and supporting structures, statements and specifications, and a hydraulic test scheme. - Transfer of documentation
The finished set DD and/or WD is transmitted electronically (PDF and source formats) and, if necessary, on paper with signatures and seals of AYU-Project.
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How We Work
Frequently Asked Questions
Yes, when laying underground water pipelines in communications protection zones, near water protection zones or on agricultural lands, approval is required from the relevant authorities. A specific list of approvals is determined based on the results of the analysis of the route and cadastral data at the design documentation stage. AYU-Project creates a list of necessary approvals and prepares sets of documents to obtain them.
Yes. AYU-Project performs strength calculations, thermal expansion compensation calculations and water hammer calculations as independent services - for example, to check previously developed documentation or to respond to expert comments. The result is presented in the form of a calculation note with conclusions and recommendations for changing design solutions.
The pipeline schedule is a consolidated detailed-design document listing the conveyed medium, operating and design pressures, temperature, category, pipe and fitting materials, diameter and wall thickness for every pipeline item. It forms the basis for material procurement, incoming inspection and commissioning of the installed system. Without it, the installation contractor may not begin work at a hazardous production facility (HPF).
After installation, hydraulic tests for strength and density must be carried out at a pressure exceeding the operating pressure by 1,25-1,5 times - in accordance with the requirements of TR CU 032/2013 and GOST 32569-2013. During operation, periodic technical inspections are carried out in accordance with the regulations of the owner of the hazardous production facility, but at least once every 4 year for external inspection and at least once every 8 years for hydraulic tests. The specific timing and testing program are being developed by the AYU-Project as part of the WD.
Yes. For pipelines subject to the CU TR 032/2013, a pressure equipment passport is issued. The passport is filled out on the basis of design and as-built documentation and is kept by the owner of the facility throughout the entire period of operation.
Polymer pipes (PVC, uPVC, ductile iron, fiberglass) are used in high-pressure water pipelines at pressures up to 2,5 MPa, depending on the size and grade of material. For process pipelines with ambient temperatures above 60°S, aggressive chemical environments or classes I-III according to GOST 32569-2013, only alloy steel pipes are used.
There is no single universal border: different standards use different criteria. According to GOST 32569-2013 pipelines of categories I-III operate at pressures from 1,6 MPa and above; According to the classification for industrial water pipelines, pressure above 1,6 MPa is considered high. For steam and chemical pipelines, classification is carried out simultaneously by pressure and temperature of the medium.
An industrial safety examination by Rostekhnadzor is mandatory for pipelines located at hazardous production facilities (HPFs) registered in the HPF register. If the pipeline is not part of a hazardous production facility, state or non-state construction expertise is sufficient. The affiliation of a facility to a hazardous production facility is determined at the stage of initial consultation in the AYU-Project.
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