Quality & documents
Steel Tube Quality, Inspection and Documents
Quality is an agreed specification, acceptance method and evidence that the selected supplier can provide.
Direct answer
What Jingtong can coordinate
We can collect buyer requirements, check supplier document options and align commercial conditions. Jingtong does not replace the project engineer, certification body, inspection agency or manufacturer.
| Control point | Buyer should state | Supplier must confirm |
|---|---|---|
| Product standard | Buyer states the applicable standard and edition | Supplier confirms manufacturing basis |
| Dimensions / tolerances | Buyer states critical acceptance limits | Supplier confirms achievable limits |
| Material test certificate | Buyer states required MTC format or data | Availability confirmed per supplier and order |
| Zinc coating | Buyer states process and g/m2, microns or project criteria | Supplier confirms inspection basis |
| Third-party inspection | Buyer states agency, scope and timing | Feasibility and cost confirmed before order |
| Marking and packing | Buyer states shipping marks and protection needs | Supplier confirms final packing plan |
| Export documents | Buyer states destination and importer needs | Document availability confirmed per transaction |
RFQ discipline
Put mandatory documents in the RFQ
If a document or inspection is required for customs, payment, project acceptance or site delivery, state it before quotation. Adding it after the order can change feasibility, price and lead time.
Useful attachment set
- Project specification or standard
- BOQ or size schedule
- Drawing and tolerances
- Inspection and document list
- Packing and marking requirement