Category
Inspection & Process Safety
Subcategory
Offshore
Applicable standards
3
Issuing bodies
2
Description
Analysis, design, installation and testing of safety systems for offshore production.
Applicable Standards (3)
API — 2 standards
API RP 14C
Analysis, Design, Installation, and Testing of Safety Systems for Offshore Production Facilities
SAFE chart methodology for offshore process safety system design.
Key requirements (7)
- Analysis, design, installation and testing of safety systems for offshore production platforms.
- Safety Analysis Function Evaluation (SAFE) chart approach.
- Two levels of protection: primary (process control) + secondary (shutdown).
- ESD (Emergency Shutdown) levels: Tier 1 (process), Tier 2 (platform).
- Mandatory safety devices: PSH, PSL, LSH, LSL, TSH, USV, BSDV.
- Required testing intervals: monthly to quarterly depending on device.
- Companion to API 754 for performance metrics.
API RP 754
Process Safety Performance Indicators for the Refining and Petrochemical Industries
Tier 1–4 leading and lagging process safety indicators (PSE, LOPC, etc.).
IEC — 1 standard
IEC 61511
Functional safety — Safety instrumented systems for the process industry sector
SIS lifecycle, SIL, application of IEC 61508 in process industries.
Key requirements (9)
- Safety Instrumented Systems for the process industry.
- Safety lifecycle: H&RA → SIL allocation → design → operate → modify → decommission.
- SIL levels (by PFDavg): SIL 1 (10⁻²–10⁻¹), SIL 2 (10⁻³–10⁻²), SIL 3 (10⁻⁴–10⁻³), SIL 4 (10⁻⁵–10⁻⁴).
- Risk reduction factor RRF = 1/PFDavg.
- SIL determination: LOPA, risk graph, risk matrix.
- Architectures: 1oo1, 1oo2, 2oo3, 2oo4 — voting + redundancy for SIL.
- Proof test interval (PTI) drives PFDavg: PFDavg ≈ λDU·PTI/2 for 1oo1.
- MooN voting requires hardware fault tolerance (HFT) per Tables 3/4.
- Cybersecurity: refer to IEC 62443 for SIS.