PLEXUS EXAMPLE · 02

P&ID revision comparison

Rev 1 against Rev 0: every added, removed and modified tag listed with before and after values, checked against the registers.

Input

DOCUMENT REFERENCEACD-300-001

Effluent Cooling & Gas/Liquid Separation

Revision: Rev 0 (IFD)
Sheet: 1 of 1

DOCUMENT REFERENCEACD-300-001

Effluent Cooling & Gas/Liquid Separation

Revision: Rev 1 (AFD)
Sheet: 1 of 1

The source P&ID is not shown: client drawings stay inside your project. The registers below come from a hypothetical plant (ACD), presented the way extraction results arrive.

What Plexus does

01Aligns both revisions tag by tag: equipment, instruments, valves and lines.
02Lists every change with its before and after values.
03Checks each change against the current registers.
04Flags missed or partial carry-overs; the engineer confirms each one.

Output

0 / 10 changes foundrun first, then export

This animation illustrates the Plexus workflow on a hypothetical plant (ACD). In the product, revision alignment runs server-side and every change keeps provenance to both source documents; an engineer reviews and confirms.

Source documents: ACD-300-001 Rev 0 (IFD) and Rev 1 (AFD), hypothetical plant

Tag	Class	Change	Field	Rev 0	Rev 1	Reason	Carried into registers
PSV-3001	Valve	modified	Set pressure	425 kPa(g)	430 kPa(g)	V-301 design pressure recalculated at vessel order stage; the set pressure follows it.	carriedValve register row updated in the same issue.
TI-3011	Instrument	added	New instrument	-	E-302 CW outlet temperature, Pt100 RTD, 0-100 deg C, DCS	CW balance monitoring requested at HAZOP.	carriedInstrument register row added.
TV-3001	Valve	modified	Size (DN)	DN150	DN100	Control valve resized after the cooling water balance.	not carriedValve register still shows DN150. Register update missing.
DN25-SCW-3013-1SS1	Line	added	New line	-	T-301 bottoms sample connection to sample point	Product sampling requirement from operations review.	checkLine register row added without an insulation class. Confirm N or ET.
LSHH-3006	Instrument	removed	Instrument deleted	V-301 level HH alarm, vibrating fork, DI/DCS	-	HH alarm function moved to LT-3004 (LICA-3004).	checkRegister row removed. Alarm philosophy document still lists the fork switch.
DN80-CAC-3004-1SS1-C	Line	modified	Size (DN)	DN80	DN100	C-401 feed hydraulics at design margin flow.	carriedLine register updated, line number reissued as DN100-CAC-3004-1SS1-C.
P-301A/B	Equipment	modified	Motor rating	1.1 kW	2.2 kW	New duty point after scrub water circulation increase.	carriedEquipment register updated.
CV-3002	Valve	added	New valve	-	Demin make-up backflow protection, swing check, DN25	Backflow scenario raised at HAZOP close-out.	carriedValve register row added.
PSHH-3005	Instrument	modified	Trip setpoint	450 kPa(g)	440 kPa(g)	SIF-104 response time review.	carriedInstrument register and SRS both updated.
TRV-3003	Valve	removed	Valve deleted	E-303 thermal relief, TRV, DN15	-	Blocked-in case removed by locked-open isolation philosophy.	carriedValve register row removed; flare tail line 3014 kept for PSV-3001 only.

Manual: 2-4 hours
With Plexus: 10-20 min review (estimate, hypothetical single-sheet exercise)

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