The replacement valve is XV-1104
MOC-024 · completed changeXV-1102XV-1104Bypass valve replaced; references require updating.
HAZOP & process safety information
Get the plant information ready for your safety review.
Raven checks whether plant changes reached the drawings and procedures, connects safeguard records and prepares HAZOP node pre-reads.
The problem
The MOC is closed. The documents may still describe the old plant.
A completed change can reach the drawing without reaching the SOP or cause-and-effect sheet. Safeguard records and previous recommendations sit elsewhere. Before a revalidation or audit, the team has to establish which information still agrees.
- Closed changes with incomplete document updates
- Safeguards missing a linked basis or test record
- Recommendations without evidence of closure
The solutionProcess safety check · Illustrative example PID-1103 · Rev 7 SOP-1103 · Rev 3 · §4.2
Trace each change through the records it should have reached.
Raven compares the MOC trail with current drawings and procedures, checks safeguard references and collects open items. It then brings the relevant information together for the safety study.
The drawing changed. The procedure still names the old valve.
Bypass valve checks
4.2 Equipment reference
The bypass valve for this line is identified as XV-1102.
This tag was retired in MOC-024.
Raven’s finding
Flag SOP-1103 for an update.
XV-1102 remains in the procedure. The completed MOC and revised drawing identify XV-1104.
How it works
- 01
Read the changes and affected equipment
Identify the tags, lines and systems in each MOC, together with the change description, dates and closeout references.
- 02
Check the affected documents
Compare P&IDs, SOPs and cause-and-effect sheets with the change. List missing updates and conflicting descriptions with their source pages.
- 03
Connect safeguards and open actions
Link the safeguard register to design-basis and test records. Check temporary changes and recommendations for end dates and closure evidence.
- 04
Prepare the node information
Assemble drawings, limits, safeguards, prior incidents and unresolved items for each HAZOP node. Your facilitator leads the study and your engineers make the decisions.
Value for your team.
Catch changes the records missed.
Find procedures and drawings that still describe the plant before an MOC.
Spend the workshop on the hazards.
Bring the node’s drawings, safeguards, limits and open items together before the review.
Assess a proposed MOC
Bring affected equipment, procedures and prior changes into the impact review.
Prepare for revalidation
Reuse the linked node information and surface what changed since the last study.
Assemble audit evidence
Find the source records and closure evidence behind the items being examined.
Customers
In production on live process plants
Raven is deployed in production across operations, maintenance, HSE, and procurement.
MOC and PSI check
Send a year of MOCsStart with a year of closed MOCs from one unit.
01What to send
- A year of closed MOCs, as exported from your MOC system
- The unit's P&IDs and cause-and-effect sheets, scans are fine
- The SOPs those changes should have reached
- HAZOP worksheets and registers, if you have them
- The safeguard or interlock register, if one exists
02Findings back in days
- Changes that never reached a drawing, a procedure, or the C&E
- SOPs that still describe the plant before the change
- Safeguards on the drawing with no basis or no test record
- Temporary changes past their end date
- Recommendations open with no closure evidence
Each finding includes its source records. A fixed fee. Your team confirms the findings.
The first check identifies where the records disagree. Raven can then prepare the wider revalidation information, or your team can continue the checks in Raven.
