Deviations Log Template

This Deviations Log Template is a cryogenic digital download designed for nitrogen plant and ASU teams to record abnormal events, deviations from expected operating behavior, commissioning irregularities, and non-conformance observations. It provides a structured format for documenting deviations, identifying contributing factors, assigning corrective actions, and maintaining traceability across commissioning, start-up, and troubleshooting phases.

What This Deviations Log Template Covers

• Deviation description and operating context

• Time-stamp, system tag, and equipment reference fields

• Impact assessment (purity, pressure, temperature, load, start-up progress)

• Immediate actions taken by operator or commissioning team

• Root cause notes for preliminary analysis

• Corrective and preventive action assignment

• Closure confirmation and verification section

• Signature block for accountability and audit readiness

Who This Deviation Log Is For

• ASU & nitrogen plant operators

• Commissioning and start-up engineers

• Troubleshooting teams

• Reliability engineers

• EPC and QA/QC teams

When To Use This Template

• During commissioning and start-up stages

• When abnormal readings or process behavior occur

• For logging unexpected events in cold box, purification, compressor, or analyzer systems

• Before performing RCA and CAPA documentation

• During audits and shift handovers

You may also find these cryogenic digital downloads helpful:

• RCA Templates Pack

• Alarm interpretation guide

• Trend reading pattern guide