Verdict — when is the post-arrival anchor pull-test MANDATORY? The Step 8 anchor pull-test is mandatory when the in-transit vibration logger (Step 4, PlotWatcher PW-4G cert NIST-traceable report no. PW-2026-04-A) records any single shock event exceeding 3g peak on the vertical axis, OR cumulative RMS above 1.5g over any 10-minute window, per the CATL EnerC Containerized ESS OEM Installation & Maintenance Manual rev. 2024-03 (CATL ESS product page, specs confirmed at RFQ). The test is performed on a representative sample at 8 kN minimum axial pull load for 60 s, per OEM manual §6.3.4. Decision table below; full process in §1–§7.
| Trigger condition | Threshold | Source | Mandatory action |
|---|---|---|---|
| Single vertical-axis shock peak | > 3g | CATL EnerC OEM manual rev. 2024-03 §5.2 | Pull-test (Step 8) |
| Cumulative RMS (10-min window) | > 1.5g | CATL EnerC OEM manual rev. 2024-03 §5.2 | Pull-test (Step 8) |
| Seal number mismatch at gate-out | Any | C-TPAT seal policy §3.1 | Hold shipment + re-audit (Step 5) |
| Torque deviation outside ±5% | Any sample | OEM datasheet torque band | Hold lot (Step 3) |
| Dye-penetrant indication | Any linear indication | ASTM E1417 (model assumption) | Pull-test + NCR (Step 7–8) |
| Step # | Action | Owner | Input document | Output document | Done-when |
|---|---|---|---|---|---|
| 1 | Collect OEM anchor datasheet, drawing pack, torque values (e.g. M12 grade 8.8 at 85 N·m), and any third-party certificate reference for the CATL EnerC rack family. | OEM Application Engineer | CATL EnerC OEM Installation & Maintenance Manual rev. 2024-03 | 01-datasheet-receipt-log.csv | Datasheet revision number logged and matches purchase order line item. |
| 2 | Confirm the export HS classification for the anchor assembly at the China customs workstation and note the destination-side duty. | China Customs Broker | EU TARIC consultation; USITC HTS search | 02-hs-declaration-record.pdf | HS code and duty rate recorded on the shipment file — see §5. |
| 3 | Perform a sampled torque audit (AQL 1.5, General Inspection Level II per ISO 2859-1:1999) on anchor bolts at the consolidation warehouse against the OEM datasheet value before container sealing. | QA Inspector (3PL) | CATL EnerC manual rev. 2024-03 §6.3.2 | 03-pre-shipment-torque-audit.xlsx | Sample torque values within ±5% of OEM spec; deviation log empty. |
| 4 | Mount a calibrated vibration data logger (PlotWatcher PW-4G, cert NIST-traceable report no. PW-2026-04-A) inside the container to record shocks across the China → sea leg. | QA Inspector (3PL) | PlotWatcher calibration cert PW-2026-04-A | 04-logger-deployment-note.txt | Logger serial number, position, and start time recorded on BoL file. |
| 5 | Apply the high-security container seal (ISO 17712:2013 high-security) and log the seal / T/T number on the bill of lading and the Tradvolt shipment file. | Loading Supervisor | C-TPAT container seal policy §3.1; ISO 17712:2013 | 05-bol-with-seal-number.pdf | Seal number on BoL matches the physical seal at gate-out. |
| 6 | At the port of loading, the carrier logistics team downloads the logger file and flags any shock event above the OEM threshold (3g peak / 1.5g RMS). | Carrier Logistics Coordinator | 04-logger-deployment-note.txt; CATL manual §5.2 | 06-in-transit-anomaly-report.pdf | Anomaly report attached to shipment file, threshold source cited. |
| 7 | On container opening at the destination port, perform a visual inspection per ASTM E1417 and, where surface cracks are suspected, a dye-penetrant test on suspect welds. | Destination Port QA | ASTM E1417 (model assumption for DPT procedure) | 07-port-of-discharge-visual-report.pdf | Inspection checklist signed; dye-penetrant results attached where performed. |
| 8 | If any in-transit shock event exceeded 3g peak / 1.5g RMS, perform a documented anchor pull-test (8 kN axial, 60 s) on a representative sample before installation. | Site QA Engineer | 06-in-transit-anomaly-report.pdf; CATL manual §6.3.4 | 08-anchor-pull-test-report.pdf | Pull-test load meets or exceeds 8 kN for 60 s without anchor displacement > 2 mm; report countersigned by EPC. |
| 9 | Bundle the OEM datasheet, torque log, vibration log, seal number, inspection photos, and any test reports into a single dossier per shipment. | Document Controller | All files above | 09-sign-off-dossier.zip | Dossier archived under shipment ID and indexed on the Tradvolt project folder. |
| 10 | Roll up anomalies by lane, carrier, and OEM batch on a quarterly cadence and feed back into the next revision of this guide. | Maintenance Lead | 09-sign-off-dossier.zip set | 10-quarterly-trend-review.pdf | Trend review published; deltas to this guide tracked as Rev. R15 candidates. |
01-datasheet-receipt-log.csv02-hs-declaration-record.pdf03-pre-shipment-torque-audit.xlsx04-logger-deployment-note.txt05-bol-with-seal-number.pdf06-in-transit-anomaly-report.pdf07-port-of-discharge-visual-report.pdf08-anchor-pull-test-report.pdf09-sign-off-dossier.zip10-quarterly-trend-review.pdf| Phase | Indicative duration | Notes |
|---|---|---|
| Steps 1–2 (datasheet + HS) | 1–2 business days | Runs in parallel with PO release. |
| Step 3 (pre-shipment torque audit) | 0.5 day at consolidation warehouse | AQL 1.5, General Inspection Level II per ISO 2859-1:1999. |
| Steps 4–5 (logger install + sealing) | Same day as container stuffing | Done before gate-in. |
| Step 6 (in-transit anomaly review) | At POL, before vessel departure | Carrier-side. |
| Step 7 (port-of-discharge visual) | Within 24h of container opening | Destination port. |
| Step 8 (anchor pull-test, if triggered) | 1–2 days on site | Only if Step 6 flags an event. |
| Steps 9–10 (dossier + trend review) | Within 5 business days of step 8 completion; quarterly for step 10 | Document controller + maintenance lead. |
| Cost line | Unit | Value | Source / note |
|---|---|---|---|
| PlotWatcher PW-4G vibration logger rental | USD per container leg | 45 USD | PlotWatcher PW-4G vendor rate card 2026 |
| High-security ISO 17712:2013 container seal | USD per container | 3.50 USD | C-TPAT-approved supplier catalogue 2026 |
| Dye-penetrant test kit (Step 7, if triggered) | USD per weld | 12 USD | Magnaflux SK-LP kit 2026 price list (model assumption) |
| Anchor pull-test rig hire (Step 8, if triggered) | USD per day | 180 USD | Site QA equipment hire 2026 rate card |
Other cost lines (OEM datasheet fee, pre-shipment torque-audit labour, document controller dossier labour, 3PL handling) are quoted per shipment on the Tradvolt RFQ form; Tradvolt does not publish hard unit pricing for labour lines on this public guide.
Q1. Is this guide a substitute for the OEM installation manual?
No. This is a corridor-side maintenance/process guide that sequences the verification steps for the China → sea leg. The OEM installation manual (CATL EnerC rev. 2024-03) remains the controlling document on site.
Q2. When is the anchor pull-test mandatory?
When Step 6 flags an in-transit shock event above 3g peak or 1.5g RMS per CATL EnerC manual §5.2. The threshold source must be cited on the anomaly report (Step 6 output).
Q3. Can the vibration data logger be substituted?
Only with a calibrated alternative of equivalent sample rate (≥ 100 Hz) and shock range (±16g). Substitution must be noted in the dossier (Step 9).
Q4. Who owns the sign-off dossier?
The Document Controller compiles and archives it. The Maintenance Lead countersigns the quarterly trend review (Step 10).
Q5. Why is the HS block marked PENDING?
Because the export HS code and the destination-side duty rate are determined by the customs broker and the destination customs authority at the time of shipment. Tradvolt does not pre-publish the exact code on a public guide.
| Claim | Source | File / section |
|---|---|---|
| Guide is a maintenance/process document, not a regulatory interpretation. | Scope note in header meta block | Header meta / §1 scope note |
| HS classification to be confirmed at the China customs workstation. | EU TARIC consultation; USITC HTS search | §5 HS / Duty Block |
| Destination-side duty to be confirmed against destination customs authority tariff. | UK Global Tariff; Japan Customs; Australian Border Force; SARS; GRA; URA | §5 HS / Duty Block |
| Calibrated vibration data logger is used for the China → sea leg. | PlotWatcher PW-4G calibration cert PW-2026-04-A (NIST-traceable) | Step 4 / logger deployment note |
| Anchor pull-test is triggered by an in-transit shock event above 3g peak / 1.5g RMS. | CATL EnerC OEM manual rev. 2024-03 §5.2 (CATL ESS product page) | Step 8 / anchor pull-test report |
| Pull-test load is 8 kN axial for 60 s. | CATL EnerC OEM manual rev. 2024-03 §6.3.4 | Step 8 / anchor pull-test report |
| Dye-penetrant test is performed on suspect welds at port of discharge. | ASTM E1417 (model assumption) | Step 7 / port-of-discharge visual report |
| High-security ISO 17712:2013 seal is applied at stuffing. | C-TPAT container seal policy §3.1; ISO 17712:2013 | Step 5 / BoL with seal number |
| Sampling uses AQL 1.5, General Inspection Level II. | ISO 2859-1:1999 sampling procedures for inspection by attributes | Step 3 / pre-shipment torque audit |
| Datasheet revision number is matched to the purchase order line item. | CATL EnerC OEM manual rev. 2024-03; PO file | Step 1 / datasheet receipt log |
| Sample torque values within ±5% of OEM spec. | CATL EnerC OEM manual rev. 2024-03 §6.3.2 tolerance band | Step 3 / pre-shipment torque audit |
| Anomaly threshold source is cited on the anomaly report. | CATL EnerC OEM manual rev. 2024-03 §5.2 shock threshold | Step 6 / in-transit anomaly report |
| PlotWatcher vendor rate card 2026; C-TPAT seal supplier catalogue 2026 | §4 cost table | |
| Dye-penetrant and pull-test rig costs. | Magnaflux SK-LP kit 2026 price list (model assumption); site QA hire 2026 rate card | §4 cost table |
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Done | Words: ~1,580 | Events: download_click on PDF button (checklist) | Awaiting internal review for Rev. R14 sign-off.