{"id":3071,"date":"2026-10-12T02:00:00","date_gmt":"2026-10-12T02:00:00","guid":{"rendered":"https:\/\/yiyizk.com\/?p=3071"},"modified":"2026-10-12T02:00:00","modified_gmt":"2026-10-12T02:00:00","slug":"heat-exchanger-fat-checklist","status":"publish","type":"post","link":"https:\/\/yiyizk.com\/id\/blog\/heat-exchanger-fat-checklist\/","title":{"rendered":"Checklist Perubahan Panas FAT: Uji Tekanan, Kebersihan, dan Dokumen"},"content":{"rendered":"

A heat exchanger FAT checklist should connect every inspection and test to an approved requirement before shipment. Confirm equipment identity, drawings, material records, dimensions, pressure boundaries, cleanliness, preservation, and document completeness; then record deviations and release conditions. A factory acceptance test cannot prove site performance unless the contract includes a representative thermal test. For a shell-and-tube exchanger, the shell circuit and tube circuit require separate attention because their pressures, fluids, and contamination consequences may differ. This guide helps purchasing and engineering teams prepare an evidence-based acceptance package without inventing a universal test pressure or claiming that an exterior photograph proves internal quality.<\/p>\n

Define the FAT boundary before booking the visit<\/h2>\n

Start with the purchase order, approved datasheet, general arrangement, inspection and test plan, and agreed construction standard. These documents define what is supplied and what the purchaser is entitled to witness. Establish the revision of every document. A checklist completed against an obsolete drawing can look thorough while accepting the wrong nozzle orientation or connection size.<\/p>\n

Describe whether the factory test covers a bare exchanger, an assembled skid, insulation, instruments, valves, or controls. A component certificate does not automatically cover the final assembly. Similarly, a skid test does not necessarily verify every pressure boundary if some items have been isolated or replaced with temporary fittings. Identify exclusions explicitly and assign them to another inspection or site activity.<\/p>\n

The purchaser should agree notice periods, witness points, hold points, record format, and responsibility for resolving deviations. A witness point and a hold point are different contractual controls: the release process must follow the approved inspection plan. Do not treat an unattended test as accepted merely because a timestamped photograph exists. Ask which tests may proceed without a representative and what documentary evidence must replace direct witnessing.<\/p>\n

Build a requirement-to-evidence checklist<\/h2>\n

The following table is a planning checklist rather than a construction code. Actual acceptance values come from the approved design, contract, and applicable requirements. The HSE pressure-testing guidance<\/a> explains why written controls, segregation, and suitable test connections matter. The ASME certification overview<\/a> describes certification of construction quality systems; it does not establish that a particular supplier or unit is certified.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n
Checkpoint<\/th>\nEvidence to request<\/th>\nAcceptance question<\/th>\nUnresolved issue handling<\/th>\n<\/tr>\n<\/thead>\n
Equipment identity<\/td>\nSerial number, tag, approved datasheet<\/td>\nDo records describe this exact unit and revision?<\/td>\nCorrect traceability before release<\/td>\n<\/tr>\n
Materials<\/td>\nRequired certificates and component mapping<\/td>\nCan pressure-contact components be connected to specified materials?<\/td>\nResolve missing or inconsistent records<\/td>\n<\/tr>\n
Dimensions and nozzles<\/td>\nApproved arrangement and measured results<\/td>\nAre installation-critical dimensions within agreed tolerances?<\/td>\nRecord deviation and obtain disposition<\/td>\n<\/tr>\n
Pressure boundaries<\/td>\nApproved procedures and test records<\/td>\nWere the required circuits and connections covered?<\/td>\nReview exclusions and schedule missing work<\/td>\n<\/tr>\n
Cleanliness<\/td>\nAgreed inspection method and cleaning record<\/td>\nIs each relevant surface ready for the specified service?<\/td>\nReclean and reinspect using the same criterion<\/td>\n<\/tr>\n
Instruments<\/td>\nCalibration records and device identification<\/td>\nWere readings produced by suitable identified instruments?<\/td>\nAssess affected test validity<\/td>\n<\/tr>\n
Preservation<\/td>\nDrying, closure and packing records<\/td>\nWill accepted condition survive transport and storage?<\/td>\nRepair protection before shipment<\/td>\n<\/tr>\n
Release documents<\/td>\nSigned report and deviation register<\/td>\nAre open items closed or formally accepted?<\/td>\nWithhold release where required by the contract<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Verify identity and material traceability<\/h2>\n

Read the equipment tag and serial number directly, then compare them with the datasheet and reports. For a unit with two pressure circuits, check that the data presented clearly identify each circuit. Avoid assuming that one pressure or temperature on a summary sheet applies to both sides. Any discrepancy should be resolved by the responsible design authority before testing or shipment.<\/p>\n

Material review should follow the actual purchase specification. Record which components require certificates, positive material identification, or other verification, and how the records link to the unit. A generic certificate for stainless steel is not enough when it cannot be connected to the specified pressure-contact component. Conversely, do not impose a test that was never required without agreeing its scope and consequences.<\/p>\n

For hygienic or corrosion-sensitive service, pay attention to the product-contact boundary, gasket specification, weld treatment, and cleaning compatibility. A material designation alone does not prove suitability for the process. Temperature, concentration, contaminants, mechanical stress, and cleaning chemistry all influence service selection. Use the separate tube-material selection guide<\/a> when reviewing the operating environment; this FAT checklist focuses on evidence that the ordered unit matches its approved specification.<\/p>\n

Inspect accessible construction and installation dimensions<\/h2>\n

Check nozzle orientation, connection type, accessible flange faces, supports, lifting features, overall envelope, and required maintenance clearance against the approved drawing. Measure features that affect installation rather than relying on photographs with no scale. Confirm that temporary shipping brackets are identified and that installation instructions explain what remains in place.<\/p>\n

For a fixed-tubesheet shell-and-tube exchanger<\/a>, an exterior view can support checks of accessible heads and supports. It cannot establish baffle spacing, tube attachment quality, or inaccessible weld condition. Request the specified inspection records and drawings for those features. Use the shell-and-tube maintenance overview<\/a> for the basic arrangement, then keep this acceptance checklist tied to the purchased construction.<\/p>\n

\"Exposed
Reference-based accessible tube-face illustration; required internal examination follows the approved inspection plan.<\/figcaption><\/figure>\n<\/p>\n

Record the method, equipment identification, measured result, acceptance basis, and inspector for every required dimensional check. If an apparent mismatch is found, distinguish a drawing error from a fabrication deviation. Both need resolution, but their corrective actions differ. Avoid changing a drawing after measurement simply to make a nonconforming unit appear compliant without an approved technical disposition.<\/p>\n

Review pressure-test readiness without prescribing a shortcut<\/h2>\n

Pressure testing introduces stored energy and belongs under a competent, written safe system of work. The approved procedure should define the test boundaries, medium, temperature, pressure, duration, venting arrangements, instruments, temporary fittings, exclusion zone, and acceptance method. Review these details before witnessing the activity. This article is a purchasing checklist, not a procedure for conducting a pressure test.<\/p>\n

Never select test pressure by copying a multiplier from another article or another exchanger. The applicable construction requirements, material behavior, design conditions, circuit combination, and test arrangement must be considered by the responsible engineer. The weakest temporary connection can be critical even when the exchanger itself is correctly designed. Confirm the rating and condition of test fittings and the method used to prevent trapped pressure.<\/p>\n

Ask how the shell and tube boundaries are tested and how potential cross-circuit leakage is evaluated where required. A pressure-holding result from one circuit does not answer every question about the other circuit. Document whether the opposing side was open, pressurized, or otherwise configured, following the approved procedure. Missing configuration details can make a report difficult to interpret later.<\/p>\n

Separate strength, leak tightness and thermal performance<\/h2>\n

These are different acceptance questions. A strength test addresses the specified pressure boundary under an approved test condition. A leakage inspection concerns unintended fluid escape under the defined method. A thermal-performance test addresses heat transfer under representative measured conditions. Passing one does not automatically establish the others.<\/p>\n

If a factory thermal test is included, agree the fluids, flow measurements, temperatures, stabilized operating condition, measurement uncertainty, and acceptance calculation beforehand. A short run with convenient workshop water may be useful as a functional check but may not reproduce the viscosity, fouling allowance, phase behavior, or utility conditions of the intended duty. Label the test honestly and avoid converting it into an unsupported performance guarantee.<\/p>\n

Installation and commissioning introduce additional variables, including piping strain, air removal, instrument setup, flow direction, and control behavior. Assign these to the heat exchanger commissioning checklist<\/a> rather than duplicating its site-startup scope in the FAT record. This boundary keeps responsibilities clear and prevents a factory signature from concealing unfinished site work.<\/p>\n

Check cleanliness, drying and preservation<\/h2>\n

Agree what cleanliness means for the actual service. Visual inspection, specified rinse assessment, particulate checks, or another approved method may be appropriate; the method and acceptance condition must be recorded. A shiny outer shell is not proof of clean internal passages. Likewise, a cleaning certificate with no equipment identity or procedure reference provides weak evidence.<\/p>\n

Review the cleaning medium and its compatibility with specified materials and subsequent service. Confirm drainage, drying, and closure arrangements where required. If water remains in inaccessible areas, the purchaser needs an agreed preservation decision rather than an assumption that transport will dry the unit. Do not invent a universal allowable residue, chloride level, or drying time; these belong in the approved service specification.<\/p>\n

\"Bolted
Reference-based dimensional inspection view; this illustration does not demonstrate a completed pressure test.<\/figcaption><\/figure>\n<\/p>\n

After inspection, protect flange faces and openings, identify removable closures, and ensure lifting and transport instructions match the delivered configuration. Packing should preserve the accepted condition. If the equipment is reopened after cleaning or testing, decide whether the inspection must be repeated. Capture that decision in the release record, especially when shipment is delayed or storage conditions change.<\/p>\n

Use a deviation register and controlled release package<\/h2>\n

Write deviations as specific differences between an observed condition and an identified requirement. Include the affected component, evidence, proposed action, responsible person, target date, and disposition authority. Avoid vague entries such as \u201cquality issue\u201d or \u201cdocuments pending\u201d that do not explain their significance. A photograph may support an entry but cannot replace a written acceptance basis.<\/p>\n

Distinguish corrections from accepted concessions. Replacing a damaged closure can be verified by reinspection. Accepting a different material or geometry requires an approved technical assessment and contractual disposition. Preserve the original observation and the subsequent decision; do not erase the first record after the issue is closed.<\/p>\n

The release package should identify the exact unit, final approved revisions, completed tests, calibration references, material records, inspection findings, deviation closure, preservation, and shipping instructions. Give the receiving team enough information to confirm that delivery matches the accepted equipment. For double-tubesheet construction, also connect the records to the design features described in the double-tubesheet guide<\/a>, without assuming that this construction eliminates every contamination risk.<\/p>\n

Further learning: pressure-testing principles<\/h2>\n

The following neutral engineering explanation from Piping Mantra introduces hydrostatic and pneumatic testing. Use it to understand the distinction in test media and stored-energy hazards; the approved project procedure and competent personnel remain essential. It is not a demonstration of testing performed on YIYI equipment, and the generic example does not set this exchanger’s acceptance conditions.<\/p>\n