During-Production Inspection (DPI) for petroleum tubular goods in China
The production is inspected when at least 20% of the order has been completed, this makes it possible the provide recommendations on site, so that the quality is maintained throughout the entire production...
The production is inspected when at least 20% of the order has been completed, this makes it possible the provide recommendations on site, so that the quality is maintained throughout the entire production phase.During Production Inspection is ideal for shipments of substantial quantities, product lines with continuous production, strict requirements for the on-time shipments, and as a follow-up if poor results were found during Pre-Production Inspection.
- Main checkpoint for DPI:
- Check the quantity and monitor the production schedule.
- Evaluate the production status during the manufacturing process
- Evaluate the product if matches with product specifications, packaging, packing and marking.
- Ensure the calibration and accuracy of equipment. CGF inspection will give advises to improve product quality and minimize
What We Check
- Early defect detection at 10–50% production output
- Production-line and process-stability review
- Workmanship, materials and key components in process
- Inline functional checks on finished sub-lots
- Corrective-action advice before mass output
When To Book This Service
- Production has reached 10–50% completion
- You need to correct issues before they scale
- For complex products or a first-time supplier
How CGF Conducts It
- We set checkpoints with your factory schedule
- Inspector visits during active production
- Samples are drawn from the live line for checks
- Real-time feedback is shared with you and the factory
- A progress report follows within 24 hours
Why It Matters
- Fix root causes early — avoid costly rework later
- Reduce the defect rate across the whole order
- Keep the shipment on schedule
- Document process control for your records
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
