Instrumentation

We support you in your instrumentation projects (modernization, expansion, or new facilities) and across all engineering disciplines, from design through to commissioning. Our expertise ensures compliance with technical and regulatory standards.

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This expertise covers all instruments used to measure and control industrial processes (sensors, control valves, actuators, analyzers). ​

We support our clients in all their instrumentation and general construction projects—whether they involve revamping, capacity expansion, or new units—from design through commissioning. Our expertise ensures they remain compliant with technical standards, industry standards (API, IEC, ISO, ISA), and regulations.

Our expertise

  • Site surveys and inspections, ​

  • Project management for revamping or new unit projects, ​

  • Turnkey projects,

  • Definition, selection, and procurement of instrumentation,

  • Cost analysis (CAPEX, OPEX), ​

  • Studies and project management for control system migration,​

  • Participation in risk studies (HAZOP, LOPA), ​

  • ATEX expertise,

  • Process control loop calculations, ​

  • Preliminary sizing calculations for instruments (temperature wells, control valves),

  • Interfaces with process packages, general installation, electrical systems, and automation,

  • Calculation of the suitability of existing instrumentation for new process conditions, ​

  • Instrumentation procurement management (requisition & inspection, analysis, clarification, and comparison of technical bids, vendor follow-up),

  • Detailed design, ​

  • Construction supervision,

  • Pre-acceptance operations, commissioning.

Our deliverables

  • Instrumentation list, ​

  • Specifications for instruments, analyzers, control valves, etc.

  • Interconnection diagrams, ​

  • Installation diagrams,

  • Pneumatic actuator control diagrams ​

  • Layout plan for instruments, cable routing, control cabinets, etc.

  • Loop diagrams,

  • Instrumentation suitability report, ​

  • Preliminary sizing calculation sheets,

  • Request and data sheet for inspection, ​

  • Technical analysis report of bids from instrumentation equipment vendors, ​

  • Work sheets for work permits, ​

  • Synchronization list and sheets, ​

  • First-level functional analysis, ​

  • Specifications for instruments, analyzers, etc. ​

  • Technical specifications (preliminary design, detailed design), study report, budget estimate, schedule, etc. ​

  • Special Technical Specifications for the construction project ​

  • Calculation notes, sizing (SI loops, SIL loops, etc.),​

  • List and synchronization sheets;​

Standards and regulations

  • NFC 15100​

  • ATEX Directive 2014/34/EU and 1999/02/EC

  • EMC Directive 2014/EU

  • NF EN 61508

  • NF EN 61511

Industries

  • Chemical / Petrochemical ​

  • Energy & Environment ​

  • Nuclear ​

  • Oil and Gas ​

  • Paper Industry ​

  • Life Sciences ​

  • Glass ​

Group presence

The Snef Group operates across four continents—the Americas, Europe, Africa, and Oceania—in 30 countries and 80 cities, with a network spanning more than 100 international locations.