CGF Pre-Shipment Inspection for Parallel Flow Tube Bundles
Sourcing parallel flow tube bundles used for heat exchangers, HVAC, refrigeration and cooling systems from China factories? CGF Inspection provides reliable Pre-Shipment Inspection (PSI) before shipment and container...
Sourcing parallel flow tube bundles used for heat exchangers, HVAC, refrigeration and cooling systems from China factories? CGF Inspection provides reliable Pre-Shipment Inspection (PSI) before shipment and container loading.
Pre-Shipment Inspection will be arranged when over 80% of production is finished and goods are ready for delivery. Our inspectors carry out random sampling according to recognized AQL standards to comprehensively assess quality consistency of finished tube bundles.
Complete Parallel Flow Tube Bundles Inspection Checklist
Quantity & Specification Verification
Count finished goods quantity, confirm part model, serial marking match purchase order and technical specifications.
Dimensional Measurement Check
Test tube length, OD, wall thickness, bending radius, hole position spacing and overall assembly dimension, verify tolerance compliance.
Surface Visual Inspection
Check aluminum tube surface for scratches, dents, black oxidation, sharp burrs, twist, flattening and irregular forming.
Welding & Connection Inspection
Examine welding joints for uniform bead, no crack, porosity, cold solder and assembly gap that may cause leakage risk.
Leakage Performance Witness Test
On customer request, witness air tightness test and hydraulic pressure test to ensure no leakage under working pressure.
Protection & Export Packaging Audit
Check plastic protective film, foam padding, anti-rust treatment, wooden pallet stability, moisture-proof packing and printed shipping marks.
Full English Inspection Report
After on-site inspection, you will receive complete report including dimension data, defect photos, testing records and overall quality judgment.
Avoid defective goods being loaded into container. Arrange pre-shipment inspection for your parallel flow tube bundles with CGF Inspection.
What We Check
- Visual & workmanship inspection against your approved AQL
- Functional and safety testing on sampled units
- Key dimensions and specifications vs the signed sample
- Quantity verification — cartons, units and assortment
- Packaging, inner/outer carton, labeling and barcode checks
- On-site photography and, where needed, carton-drop or smell tests
When To Book This Service
- Finished goods are 80–100% produced and at least 80% packed
- Before you release the final balance payment to the factory
- For a new supplier, a new product, or any high-value order
How CGF Conducts It
- We agree the AQL level (General II, normal) and sample size with you
- A local CGF inspector visits the factory on the confirmed date
- Checks cover appearance, function, measurement and packing
- All findings are photo-documented on site
- A detailed English report is sent within 24 hours
Why It Matters
- Catch defects before the goods leave China — far cheaper than returns
- Protect your final payment until quality is verified
- Avoid rejected shipments, chargebacks and brand damage
- Get independent evidence for any supplier dispute
Industries We Cover
Where We Operate
Zhejiang, Jiangsu, Shanghai, Guangdong (Dongguan / Shenzhen / Foshan / Shunde), Qingdao, Sichuan, Chongqing and across China.
Inspection Standards We Work To
| Standard | What it covers |
|---|---|
| AQL (Acceptance Quality Limit) | Defines the maximum number of defective units acceptable in a random sample — the basis of our sampling plans. |
| ANSI/ASQ Z1.4 | U.S. standard for sampling by attributes (single, double and multiple sampling). |
| ISO 2859-1 | International general standard for sampling by attributes, equivalent to ANSI/ASQ Z1.4. |
| ISO 9001 | Quality management system baseline referenced in our factory audits. |
| IEC / EN / ASTM | Product-specific safety & performance references applied per your specification. |
Every CGF assignment includes
- An independent, on-site inspector working for you — never the factory
- Internationally recognised AQL sampling (ANSI/ASQ Z1.4 · ISO 2859-1)
- On-site photos embedded in every report
- A detailed, bilingual English inspection report within 24 hours of the visit
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