Prepare a Tube Plugging Handover from NDT Results

A useful tube handover distinguishes the inspection finding, the authorized maintenance action and the evidence that the action was completed. Those are separate records even when they appear on one tube map. Do not convert every colored indication into a plugging instruction or mark a tube plugged because it appears on a proposed work list. The matrix should make the responsible decision and actual work status visible for each physical tube.

This guide addresses record transfer between inspection, engineering and maintenance teams. It does not select a plugging threshold, allowable tube count, plug type or installation method. Those decisions depend on the actual exchanger and responsible technical basis. Preserve their source instructions and approvals. The reporting task is to prevent a valid inspection result from being mistaken for a maintenance authorization or an unconfirmed work instruction from being mistaken for the final configuration.

Record the exchanger identifier and the actual bundle or component reference relevant to the work. A removable bundle may have its own identity and history. Do not assume that the shell tag alone uniquely identifies every tube record used across maintenance campaigns. Preserve the source drawing, map revision and actual installed or removed state so the handover refers to the physical assembly examined rather than a similar exchanger or an older bundle configuration.

If the bundle was exchanged or retubed, retain that event in the history. Old plugged-tube positions may no longer describe the current physical population. The final map should identify the actual configuration and reference the confirmed change record. Do not carry forward an old tube-status list simply because its row and column pattern resembles the current tubesheet. Similar geometry is not proof of unchanged material or maintenance history.

Identify the viewing end, orientation, row and column direction and actual numbering convention used by each team. A map viewed from the opposite end can reverse the apparent position of a tube. Preserve the source convention and any verified crosswalk before issuing work instructions. Do not rely on a verbal description such as left side or top row when the receiving team may be looking from a different face or using a differently rotated drawing.

Where tube numbers differ between inspection software and maintenance drawings, retain both identifiers with a confirmed relationship. The worker should be able to locate the intended tube without translating an ambiguous map at the point of work. A mapping conflict is a specific handover issue, not a reason to choose whichever identifier appears in the latest spreadsheet. Preserve the resolution and affected records so later review can reproduce the identification decision.

Preserve the actual method, result category, location and qualification from the reviewed inspection report. A relative indication, an estimated dimension and a directly measured quantity are different forms of evidence. Do not place them under a common defect-depth heading without the responsible interpretation. Where multiple methods contribute, retain their separate source references and the actual conclusion drawn from their combination rather than choosing the most convenient value for the maintenance table.

Eddyfi’s TubePro product description presents tubesheet mapping and inspection-data organization in its own software. A map is useful because it connects information to tube identity, but it does not eliminate the need to preserve the actual result meaning. NDT Connect does not analyze native TubePro or other tube-inspection datasets. Its worksheet records the reviewed information supplied by the responsible examination process.

Create a clear legend for the inspection categories and a separate legend for proposed or authorized actions. The same color should not silently change meaning between maps. For example, an inspection category may identify an item for review while a maintenance map uses a similar color for completed work. Preserve the actual definitions and map issue so recipients understand whether a symbol represents evidence, a decision or a physical configuration.

If a combined map is used, make each state explicit through labels or separate fields. Avoid a single status column that changes from indication to plug required to plugged without preserving the intervening decision. The handover record should retain the responsible instruction and completion evidence. This allows a reviewer to distinguish a changed assessment from completed work even when the final map uses a compact presentation.

Record the responsible instruction that selects the action for each tube or defined group. Preserve its revision and scope. Do not infer authorization from the presence of an engineer’s name elsewhere in the dossier or from a preliminary recommendation in an inspection report. The handover should identify the actual reviewed decision and any conditions attached to it, while keeping unresolved recommendations separate from authorized work.

The responsible team determines the implications of plugging, repair, further examination or other action for the exchanger. The worksheet does not establish an allowable percentage of plugged tubes or assess thermal and mechanical performance. Avoid adding a generic limit from another exchanger or a vendor example. Keep the project’s actual evaluation and decision retrievable so the maintenance team is acting on the correct basis for this physical configuration.

A tube that could not be examined is not automatically defective or satisfactory. Preserve the actual reason and scope of the limitation. Blockage, restricted access, incomplete probe travel and an unavailable record may require different follow-up. Do not combine them into one tested category or assume that a blocked tube is already plugged. The actual physical state and the examination state should remain separately identifiable.

Where the responsible team decides an action despite limited examination evidence, retain that decision and its stated basis. The report should not invent a missing inspection result to make the action list look complete. A transparent record of the limitation and authorized response is more useful than an apparently uniform dataset that conceals which tubes had no usable examination evidence.

Record the confirmed pre-existing plug population separately from newly authorized actions. Do not treat every plugged position observed during the outage as work completed by the current crew. Preserve the source of the historical status and any actual field confirmation. Where the old map and current observation disagree, identify the discrepancy for resolution rather than automatically accepting whichever population produces the expected total.

A historical plug record may also require a crosswalk if the numbering convention changed. Keep that relationship visible, including any uncertain identity. The final configuration should explain which tubes were already out of the active population and which changed during this work package. The matrix does not certify the condition or suitability of existing plugs merely because their positions have been entered or carried forward.

In a fictional exchanger handover, the reviewed inspection identifies tube R8-C12 for engineering consideration. A later instruction authorizes a defined maintenance action, and the planning map labels it for plugging. Before the crew completion record is received, a draft final report calls the tube plugged. Review restores the distinction between authorized and completed work and keeps the final state pending until the actual evidence is available for the correct tube identity.

The example does not prescribe whether R8-C12 should be plugged, what hardware to use or how to install it. It demonstrates the evidentiary gap between a decision and its execution. If the actual work differs from the instruction, the handover should preserve the discrepancy and responsible resolution rather than simply changing the final map to whichever status seems most likely.

Use the actual exchanger arrangement and work instruction to identify which tube ends or connections are involved. Do not assume that a count of work points equals a count of tubes. A tube identity can relate to more than one end-specific record, and a U-tube arrangement requires an appropriate physical correspondence. Preserve the actual drawing relationship rather than applying a universal counting shortcut to every exchanger type.

Where completion is recorded separately at different locations, retain those records and reconcile them against the authorized scope. A completed entry at one location should not automatically close another required task. The worksheet does not specify how many plugs or actions a tube needs. It records the actual instruction and evidence so the final tube status follows the supported work package rather than an assumed relationship between counts.

If the authorized response is something other than plugging, retain that actual action type. A repaired or replaced tube is not the same configuration as a plugged tube. Do not force all maintenance outcomes into a single closed category that obscures their physical differences. Preserve the relevant work instruction and examination or verification records for the actual intervention. The final map should describe what is installed, not merely that some action occurred.

Where an initial action is later changed, retain the sequence and responsible revision. A tube initially selected for plugging may receive another authorized disposition, but the earlier instruction should not remain active in a separate crew list. The handover process needs a clear current version and confirmation that conflicting work instructions have been resolved. The report editor does not automatically recall printed lists or notify every recipient of a change.

Record the actual evidence that the maintenance task was performed, then identify any separate verification or testing required by the responsible instruction. Do not infer completion of the latter from the crew’s work-complete entry. The required process may involve other records and responsible parties. This worksheet does not prescribe test pressure, duration, method or acceptance criteria; it provides fields that keep the actual tasks and results distinct.

Where a verification remains open, retain that status in the final handover even if the physical action is complete. A project can need an accurate progress record before every closeout task is finished. The report should state that boundary clearly instead of using issued as a substitute for final technical release. Operational authorization remains a separate responsible decision supported by the complete applicable evidence.

Define the units used in the final totals. Count distinct tube identities separately from end-specific work points, inspection events and maintenance tasks. Keep pre-existing plugs, newly completed work, canceled instructions and unresolved items in their appropriate categories. A grand total assembled from incompatible counts can look consistent while misrepresenting the actual exchanger configuration. Preserve the underlying list so another reviewer can reproduce each reported measure.

If the report presents a fraction or percentage, identify its denominator and purpose. Do not calculate an engineering acceptability limit from the administrative population. The responsible assessment determines how the actual configuration affects the exchanger. The handover matrix should provide reliable evidence for that process without claiming that a numerical percentage alone establishes thermal capacity, mechanical integrity or suitability for continued service.

The TEMA support page offers free specification-sheet downloads and an exchanger nomenclature chart. These can help teams identify the equipment description and units used in source records. They are not a plugging authorization, a substitute for applicable controlled requirements or an endorsement of NDT Connect. Use the actual project documentation to establish the work basis and preserve its effective revision.

Do not assume a downloaded form can be imported into a report editor without review. Complex layouts and calculations can have meanings that a simple table does not preserve. If preparing a supported DOCX or XLSX table for import, retain the original file and inspect the preview carefully. The reporting workspace does not execute spreadsheet formulas or reproduce every feature of an external specification form. Transfer only the reviewed information needed for the handover.

The digital reporting workspace can hold tube identities, inspection references, authorized actions and completion statuses. Keep native tube maps, acquisition files and examination images in the agreed external package and reference them in text. The workspace does not analyze tube data, generate plugging decisions or attach technical images through its company and client logo controls. Draft and issued are user-declared document states, not engineering approvals.

The equipment tracker organizes entered instrument references, and the procedure draft tool can help structure proposed handover responsibilities for review. The quote comparison tool compares actual included work and exclusions. The tube-map software guide supports selecting suitable source deliverables. None of these tools supplies a universal maintenance threshold or verifies that the crew acted on the correct physical tube.

Choose a tube marked complete and trace its map identity, inspection finding, authorized action and actual completion evidence. Confirm that any required verification and responsible disposition are identifiable. Then choose an unresolved tube and check that its limitation remains visible in the summary. This paired review catches the common error of treating a populated action list as a fully completed maintenance record.

Replace the fictional worksheet row with actual evidence and use the report buyer-review guide for broader delivery checks. A dependable plugging handover shows what was found, what was authorized and what was actually done. It preserves the current physical configuration without converting inspection colors into work instructions or suggesting that a free report generator independently approves exchanger performance or operation.