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Services

Site construction

Practical on-site support for every EPC project — from planning to a clear and precise handover.

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Our site construction team provides practical on-site support for every project. It is the focal point for every aspect of each EPC project, including the careful execution of the installation phase. Our construction crews deliver well-coordinated installation and, when the work is ready, a clear and precise handover. As a client, you receive comprehensive planning and seamless coordination of every aspect of site construction.

A SEMAC team member in a high-visibility jacket at a pipeline site, with cranes and an open trench

Our on-site activities

  • Project site management
  • Effective planning
  • Site safety and environmental impact management
  • Detailed engineering follow-ups and updates
  • Site fabrication, assembly and installation — structural, piping, mechanical, electrical and instrumentation
  • Site acceptance test (SAT)
  • Technical documentation, as-built updates (red-marked documents, manuals, literature) and post-completion installation support
Aerial view of a station under construction: above-ground piping and a mobile crane on sitePipelaying machines and an excavator at work on a pipeline site

How we work

  1. Planning

    Comprehensive planning and coordination of every aspect of the work on site.

  2. Site management

    Project site management, site safety and environmental impact management, and follow-ups and updates of the detailed engineering.

  3. Installation

    Site fabrication, assembly and installation: structural, piping, mechanical, electrical and instrumentation.

  4. Site acceptance test

    The site acceptance test (SAT) of the completed installation.

  5. Handover

    A clear and precise handover, with technical documentation, as-built updates and post-completion installation support.

In practice

What this service covered in some of our projects, as described in each project’s scope.

  • DESFA Compressor Station in Komotini

    Civil, mechanical and E&I works: erection of static and rotating equipment, piping prefabrication and erection, non-destructive testing, installation tests such as pressure tests, and assistance during pre-commissioning, commissioning and start-up.

  • Construction of Thessaloniki Metro Stations

    Installation, connection and testing of the stations’ electrical systems — from the traction and auxiliary substations to lighting, fire detection and signalling — and installation of the mechanical equipment.

  • Skouries K102 Project

    Prefabrication and installation of HDPE piping, erection of steel piping, and electrical works through to the testing and commissioning of the electrical installations.

Terms explained

EPC
Engineering, procurement and construction: a contract under which one contractor delivers the design, the supply of equipment and materials, and the construction of a facility.
SAT
Site acceptance test: tests on site, after installation, that confirm a system works as specified before it is handed over.
As-built documentation
Drawings and documents updated to show the installation exactly as it was built, including the changes marked up on site.
Pressure test
A test in which piping is filled with water (hydrostatic) or air (pneumatic) above its design pressure, to confirm that it is strong and leak-tight.

Projects with this service

Projects where this service was part of our scope.

Oil & Gas

HELLENiQ PETROLEUM Thessaloniki Industrial Installations: Mechanical & Electrical Works

Multi-year framework agreements with HELLENiQ PETROLEUM for mechanical, electrical, instrumentation and fire-protection works at the Thessaloniki refinery.

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Oil & Gas

DESFA Kardia Metering Station (U-9430): Detailed Engineering, Procurement & Construction

EPC of the Kardia metering station (U-9430) for DESFA: accurate gas metering, system integration and reliable operation in the national transmission network.

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Oil & Gas

Altbach HKW3: Fabrication and Installation of Alloy Steel Piping and Supports

Prefabrication, installation and testing of high-pressure alloy steel piping systems and supports (P91, P92, P22) for the Altbach HKW3 power plant in Germany.

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Infrastructure

Skouries K102 Project

Prefabrication and installation of HDPE piping, erection of steel piping and electrical works, with stations and substations, for the Skouries K102 project.

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Metering systems

New Metering System for the 4th Metering Train at U-3020 Aghia Triada

A new metering system for the 4th metering train at the U-3020 Aghia Triada station, for accurate gas flow measurement across the full operating range.

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Oil & Gas

DESFA Compressor Station in Komotini

Civil, mechanical and E&I works for the DESFA compressor station in Komotini: equipment, piping and steel erection, building finishes and control systems.

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Oil & Gas

Gas Interconnector Greece–Bulgaria (IGB)

Prefabrication and field mechanical works for DESFA and TAP facilities at the IGB station in Komotini, with system installation, cabling and common utilities.

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Infrastructure

Construction of Thessaloniki Metro Stations

Electrical and mechanical works in Thessaloniki Metro stations, from traction power substations to signalling and access control.

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Oil & Gas

Trans Adriatic Pipeline (TAP)

Civil, mechanical and E&I works for BVS 9, BVS 10 and GCS 01, and the engineering and fabrication of launchers, receivers and hydrotest heads.

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Metering systems

Expansion & Upgrade of the DESFA East (U-2220) and North (U-2240) M/R Stations in Thessaloniki

Detailed design, procurement, installation and commissioning of a third regulating/metering line at each station, with full equipment supply.

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Infrastructure

Extension of Line 2 — Agios Dimitrios–Elliniko Section

Electrical and mechanical works for the Agios Dimitrios–Elliniko extension of Athens Metro Line 2.

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Let’s talk about your project

Contact our team in Sindos, Thessaloniki, by phone or email.