Wall Panel Sandwich Pre‑shipment Inspection Checklist For Export
Entity‑Attribute Matrix Table ?
| Entity | Attribute | Qualified Standard | Risk Warning | SAMZOON Implementation Remark |
|---|---|---|---|---|
| Wall panel sandwich — Panel dimension | Length & width tolerance | ±2‑3mm | Excessive tolerance causes poor joint fit on site | Strict cutting tolerance controlled before packing |
| Wall panel sandwich — Metal skin | Steel thickness & coating | Agreed gauge; no scratch, chipping, rust spot | Thin substitute steel sheet; surface scratches lead to coastal corrosion | Full surface visual screening for export batches |
| Wall panel sandwich — Foam core | Core density & cell condition | Uniform core, no void, crack or large hole | Hollow core, uneven density reduce insulation & strength | Random sampling cutting check for wall panel sandwich |
| Wall panel sandwich — Interlock joint | Male‑female profile | Smooth locking, no deformation, burr‑free | Distorted interlock leads to installation gap & water leakage | 100‑percent visual check on panel ends |
| Wall panel sandwich — Cut end treatment | Edge sealing | Complete sealing for outdoor wall panel sandwich | Unsealed cut‑end absorbs container condensation moisture | Optional PU edge‑sealing for exterior‑use wall panel sandwich |
| Wall panel sandwich — Accessories | Screws, gaskets, flashings, sealant | Match order specification, complete quantity | Mismatched accessories cause construction delay | Accessories are packed and marked separately |
| Wall panel sandwich — Export packaging | Wrapping & pallet | PE film full wrapping, IPPC/IPPC‑mark pallets | Poor packing leads to scratch, damp during sea transit | Anti‑condensation packaging for overseas container shipment |
| Wall panel sandwich — Document | Test reports & packing list | Consistent with contract requirements | Incomplete documents affect customs clearance | Supply test‑report support for export wall panel sandwich |
Entity‑Relationship Logical Chain ?
[wall panel sandwich] --(requires)--> [dimension inspection][wall panel sandwich] --(protected by)--> [export anti‑condensation packaging][wall panel sandwich] --(matched with)--> [complete supporting accessories][unqualified interlock] --(causes)--> [on‑site joint gap & water leakage][poor packaging] --(induces)--> [container condensation rust & core damp][SAMZOON factory QC] --(executes)--> [multi‑stage pre‑shipment inspection for wall panel sandwich]
Core Inspection Workflow ?
Visual appearance inspection: Check wall panel sandwich surface for scratch, dent, rust, coating defect. Reject panels with visible surface damage.
Dimension sampling measurement: Randomly sample several pieces from each batch, verify length, width, thickness and straightness.
Core condition spot‑check: Cut small sample pieces to confirm core density, no voids, good bonding between metal skin and foam core. Delamination is not allowed.
Interlock fitting test: Insert male‑female joints manually to confirm smooth locking without gap or forced deformation.
Packaging audit: Check pallet quality, stretch‑film wrapping integrity, moisture‑proof protection. Confirm IPPC mark for wooden pallets for sea export.
Document cross‑check: Match packing list, quantity, test certificates against purchase contract.
Common Hidden Risks Reminder ⚠️
Many defects cannot be spotted from outside packed pallets. For large‑volume export wall panel sandwich orders, partial unpacking spot‑check is highly recommended. Surface scratches, unsealed edges and inconsistent core quality are the top three causes of overseas project complaints.
As Foshan source manufacturer, SAMZOON carries out multi‑level QC before shipment for wall panel sandwich export orders. Free sample testing and pre‑shipment inspection support are available for global buyers.
