SIET

What SIET does

SIET S.p.A. (tagline: Sperimentiamo le tue idee) is a privately held Italian consulting and technical services company founded in 1983 and headquartered in Piacenza, Italy. The company provides thermo-hydraulic and mechanical testing, accredited metrology and calibration, product and management system certification, nuclear R&D, and engineering/training services to industrial clients across the energy, nuclear, manufacturing, and HVAC sectors. Its core assets are unique physical experimental facilities, most notably the SPES (Simulatore Pressurizzato per Esperienze di Sicurezza) — a full-height pressurized water reactor (PWR) simulator approximately 30m tall, scaling 1:400 by volume, delivering 7 MW of thermal power, and described as unique worldwide for its size and power output — and the GEST-SEP steam separator test facility, operational since 1984 with capabilities up to 200 kg/s water flow and 500°C superheated steam.

The company operates as an ACCREDIA-accredited body across three functions: testing laboratory (LAT N. 096), calibration laboratory, and certification body (unified accreditation number 00124 effective October 2025). It is the only Italian laboratory authorized for hydraulic disconnectors testing under the UNI mark and is a CEN KEYMARK-accredited body for EN 215 thermostatic valves. Revenue streams are entirely professional services, organized into five service lines: laboratory testing, metrology and calibration, innovation and research, engineering and training, and certification. Pricing is custom quote-based, with multi-year contracts typical.

Ownership is concentrated among state-controlled and institutional shareholders: ENEA (Italian National Agency for New Technologies, Energy and Sustainable Economic Development) holds 44.146%, ENEL Innovation Hubs holds 41.549%, with the remainder held by TECTUBI RACCORDI (6.417%), Politecnico di Milano (3.576%), Mare Engineering Group (2.156%), and Ansaldo Energia (2.156%). Named customers include Westinghouse, EDF, AREVA, ENEL, ENI, SNAM, Saipem, Brembo, Bardiani Valvole, Giacomini, ENEA, and IAEA. SIET served international markets across Europe, North America, and Asia Pacific, and disclosed FY2025 revenue of €6.3 million. Leadership includes President Giorgio Graditi (recipient of the 2024 European Excellence Award) and CEO Alfredo Luce.

Name

SIET

Legal name

SIET S.p.A.

Website

https://siet.it

Company type

Private

Founded year

1983

Operating status

Operating

Headcount range

11–50 employees

Short description

SIET is a privately held Italian technical services firm providing thermo-hydraulic testing, ACCREDIA-accredited metrology and certification, and nuclear R&D from its Piacenza headquarters, serving enterprise customers across the energy, nuclear, and manufacturing sectors worldwide.

Ownership category

akta.pro rank

Product category

Industrial Testing & Certification Services

NAICS

Testing Laboratories and Services (54138), Engineering Services (541330), Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515)

SIC

Services-Testing Laboratories (8734), Instruments For Meas & Testing Of Electricity & Elec Signals (3825), Services-Commercial Physical & Biological Research (8731)

akta.pro primary industry

Component Qualification, Testing & Certification (Seismic, Environmental, EMI/EMC) (EUAKADAO)

akta.pro secondary industries

Third-Party Certification, Code Compliance & Regulatory Inspection (ASME/API/ISO) (EUAEAHAN), Pressure Equipment, Boilers & Heat Exchanger Inspection (EUAEAHAB), Tank, Vessel & Pipeline Inspection/Cleaning/Repair (API/ASME) (IMAIACAH), Non-Intrusive Inspection (NII) & Advanced NDT (PAUT, TOFD, RT/DR) (EUAEAHAK)

Keywords

• Thermo-hydraulic testing
• Nuclear component testing
• Accredited calibration services
• Industrial valve certification
• Engineering training services

Headquarters

HQ city

Piacenza

HQ country

Italy

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Infrastructure, Operations, Technology or R&D, Marketing or Sales, Others

Revenue model

1. Laboratory Testing Services: Testing services for industrial components including valves, heat exchangers, piping, sealing devices, and automotive components. Services include development testing, commissioning, qualification, and certification. The company has over 30 years of experience in this area.
2. Certification Services: Product and system certification services including ISO 9001 quality management systems, ISO/IEC 27001 information security, thermostatic valves (Keymark), and hydraulic disconnectors (UNI mark). Operates as an ACCREDIA-accredited certification body.
3. Metrology and Calibration: Accredited calibration services for temperature, pressure, flow, dimensional, electrical, force, torque, mass, volume, density, noise, time, humidity, and velocity measurements. Issues calibration certificates and reports.
4. Innovation and Research: Research and development services for nuclear power plant components and systems, including experimental campaigns, thermal-hydraulic calculations, and engineering support.
5. Training and Engineering: Training courses on metrology, quality management, ISO standards, and engineering services including experimental facility design and data acquisition systems.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels6 records

Core offering

SIET is an Italian technical-scientific consulting and testing services company that operates five integrated service lines: (1) Laboratory Testing Services for development, qualification, and certification of mechanical and thermohydraulic components (valves, heat exchangers, piping, sealing devices, automotive parts); (2) ACCREDIA-accredited Metrology and Calibration Services for temperature, pressure, flow, and other physical quantities; (3) Innovation and Research Services focused on nuclear power plant components, operating unique experimental facilities including the SPES nuclear simulator and GEST-SEP steam separator test rig; (4) Engineering and Training Services for experimental plant design, data acquisition systems, and professional courses; and (5) Certification Services as an ACCREDIA-accredited body for ISO 9001, ISO/IEC 27001, and product certifications (Keymark, UNI mark).

Product overview

SIET (Sperimentiamo le tue idee) provides a comprehensive portfolio of technical-scientific services organized into five core offerings: Prove di Laboratorio (Laboratory Testing Services) for component certification and development; Metrologia e Taratura (Metrology and Calibration Services) for instrument calibration; Innovazione e Ricerca (Innovation and Research Services) for nuclear power R&D; Ingegneria e Formazione (Engineering and Training Services) for plant design and professional training; and Certificazioni (Certification Services) for management system and product certification. The laboratory testing division covers industrial valves, hydraulic disconnectors, thermostatic valves, heat exchangers, piping/fittings, sealing devices, and automotive components. The metrology division provides ACCREDIA-accredited calibration for temperature, pressure, flow, and other physical quantities. The innovation division operates unique experimental facilities including the SPES nuclear simulator and GEST-SEP steam separator test facility. The engineering division offers experimental plant design, test bench construction, and thermofluidodynamic calculations. The certification division provides ACCREDIA-accredited ISO 9001, ISO/IEC 27001, and product certification services.

Differentiator

Problem solved

Functional benefit

Products and services

• Prove di Laboratorio (Laboratory Testing Services) Laboratory testing services for development, verification, qualification, and certification of mechanical and thermohydraulic components including industrial valves, hydraulic disconnectors, thermostatic valves, heat exchangers, piping/fittings, sealing devices, and automotive components. Target customers: industrial manufacturers, valve producers, HVAC/heating component makers, automotive suppliers.
• Metrologia e Taratura (Metrology and Calibration Services) ACCREDIA-accredited metrology laboratory providing calibration services for temperature (-40°C to 1100°C), pressure (0.2 mbar to 600 bar), flow, dimensional, electrical, force, torque, mass, volume, density, noise, time, humidity, and velocity measurements, with accredited calibration certificates available online via e-commerce portal.
• Innovazione e Ricerca (Innovation and Research Services) Research and development services for components and systems for nuclear power plants and other energy production facilities, including nuclear plant simulators (SPES), steam separators, safety systems, jet pumps, reactor fuel rod bundles, and high-flux heat exchange for fusion reactors. Target customers: nuclear OEMs, utilities, reactor designers, and SMR developers.
• Ingegneria e Formazione (Engineering and Training Services) Technical-scientific engineering services including experimental plant design, test bench and educational bench construction, thermofluidodynamic calculations, measurement uncertainty calculation, instrumentation management, data acquisition system development, and professional training courses on metrology, quality management, and ISO standards.
• Certificazioni (Certification Services)

Quantifiable outcome

• Test conditions up to 500°C, 20 MPa, 200 kg/s achievable for valve testing
• +3 more outcomes

Named customers17 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Seven partnerships are on record, tiered core, strategic and minor.

• ENEAcoreStrategic or Co-development PartnerENEA (Agenzia Nazionale per le nuove tecnologie, l'energia e lo sviluppo economico sostenibile) is the largest Italian shareholder at 44.146% and key strategic partner. Collaborates on nuclear research, simulator development (SPES campaigns), and is the primary public research partner for SIET's nuclear testing activities.
• ENEL INNOVATION HUBS S.r.l.coreStrategic or Co-development PartnerENEL Innovation Hubs holds 41.549% stake as the second largest shareholder. Strategic partnership for energy sector innovation and nuclear technology development, leveraging ENEL's position as major electricity producer in Italy.
• Nuscale PowerstrategicStrategic or Co-development PartnerNuscale Power (Small Module Reactor innovative technology company) partners with SIET for SMR testing and development support. SIET has conducted experimental campaigns for Nuscale's small modular reactor technology.
• Assoservizi Piacenza - CONFINDUSTRIAminorGTM or Marketing PartnerService company of the Piacenza Industrialists Association providing industry networking, training events, and local business development support. SIET participates in association activities including Confindustria in Campo charity sports events.
• N.I.N.E.minorStrategic or Co-development PartnerNuclear and Industrial Engineering company providing engineering services for nuclear sector. Partnership for collaborative projects in nuclear testing and engineering.
• Politecnico di MilanostrategicStrategic or Co-development PartnerPolitecnico di Milano holds 3.576% stake and is a key academic partner. Provides engineering student internships, collaborative research, and test bench development (e.g., control rod test bench for new generation nuclear reactors).
• ANSALDO ENERGIA S.p.A.coreStrategic or Co-development PartnerAnsaldo Energia holds 2.156% stake and is a major Italian nuclear reactor manufacturer. Long-standing partnership for nuclear component testing including heat exchanger prototypes for nuclear power plants.

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Tecnatom: Spanish nuclear services company providing inspection, training, and engineering services to nuclear power plants worldwide — directly comparable in service offering and customer base to SIET's nuclear R&D and training services.
• Tractebel (ENGIE): Belgian engineering consultancy with a dedicated nuclear division providing engineering, safety analysis, and testing support to nuclear operators and OEMs — overlaps directly with SIET's nuclear R&D and engineering services portfolio.
• NRG (Nuclear Research and Consultancy Group): Dutch nuclear research and consultancy operator of the HFR reactor and thermal-hydraulic test facilities, providing irradiation and nuclear testing services — comparable to SIET's operator-of-specialized-facility business model.
• Studsvik: Swedish nuclear services company providing fuel and materials testing, software, and decommissioning services — directly comparable to SIET's nuclear testing and engineering services for European utilities and OEMs.
• Framatome: France-based global nuclear reactor and services company that designs, builds, and services nuclear steam supply systems, and provides engineering and testing services for nuclear components — directly comparable to SIET's nuclear component qualification and engineering offering.
• Wood (Nuclear business): UK-based engineering services firm with a nuclear division providing testing, inspection, and engineering support to nuclear operators globally — comparable to SIET's combination of laboratory testing and engineering services.
• Kiwa: Dutch TIC (testing, inspection, certification) company operating accredited laboratories and certification bodies across Europe — directly comparable to SIET's ACCREDIA-accredited testing, calibration, and certification service portfolio outside the nuclear niche.
• VTT Technical Research Centre of Finland: Finnish state-owned technical research center operating nuclear safety and thermal-hydraulic test facilities — closely comparable to SIET's specialized experimental facility model and public-research ownership structure.

Broad incumbents

• Bureau Veritas: French-listed global TIC leader with testing, inspection, and certification services across energy and industrial markets — a broad incumbent overlapping with SIET's industrial testing, calibration, and certification service lines.
• Applus+: Spanish-listed global TIC group operating testing, inspection, and certification laboratories across energy, industrial, and infrastructure sectors — a broader incumbent competitor in the industrial testing/certification space where SIET competes.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/siet-s.p.a.

Compliance10 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles11 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about SIET