Quality & documentation
Quality you can show an auditor
Every part we deliver can be traced to its source and is accompanied by the manufacturer's documentation. This page explains the controls we apply and the documents you can request with your order.
Six controls, from purchase to delivery
Controlled sourcing channels
We buy from the manufacturer or its authorized distributors wherever the product is in current production. This single rule eliminates most counterfeit risk before any inspection takes place.
Supplier qualification
Any other source — used for discontinued or allocated items — is qualified before purchase: company identity, trading history, references, provenance documentation and return terms. We tell you when a part comes from such a source.
Order verification
Before ordering, an engineer verifies the complete ordering code against your request and application: voltage, I/O, communication, process connection, approvals. Most "wrong part" deliveries are prevented here.
Incoming inspection
Goods are checked against the purchase order and the manufacturer's packaging standard: part number and quantity, label and hologram where used, serial numbers recorded, visible condition, and a power-on or function test where practical for discontinued or non-authorized-source items.
Documentation
Commercial invoice and packing list with every shipment; Certificate of Conformance, declaration of conformity, country-of-origin statement, datasheets, calibration and material certificates on request. Records are kept so documents can be re-issued later.
Traceability and after-sales
Serial numbers are linked to your order number. Warranty claims are handled through us with the manufacturer, and we keep the history of what was delivered to each site for spares planning.
Documents you can request
- Certificate of Conformance (CoC) — HOANTRANTDH statement that the delivered goods conform to the order, with manufacturer part numbers and quantities
- Manufacturer declaration of conformity — CE / UKCA / UL evidence as published by the manufacturer
- Country-of-origin statement — as stated by the manufacturer on labels or documents
- Datasheets, manuals, drawings and 3D models — current manufacturer versions
- Calibration certificates — factory calibration for instruments, with traceability statement, quoted per device
- Material certificates (EN 10204 3.1) — for wetted parts of instruments and valves, where offered by the manufacturer
- Hazardous-area certificates — ATEX / IECEx certificates matching the delivered ordering code
- Test reports — for refurbished or tested replacement units
Standards we work to
Product compliance
CE, UL/cULus, RoHS, REACH, EAC and other marks are the manufacturer's declarations. We supply the evidence that belongs to the exact product revision delivered, and never claim a mark the product does not carry.
Counterfeit avoidance
Our inspection practice follows the intent of SAE AS6081 and IEC 62668 for non-authorized sources: documented provenance, visual and marking inspection, and functional checks before release.
Engineering deliverables
Control systems are documented to IEC 61131-3 programming practice, IEC 62443 network security principles and ISA-18.2 alarm management — and tested with signed FAT/SAT protocols.
A note on honesty. We would rather tell you a part is sourced from a non-authorized channel, or that a document is not available, than paper over it. If a specification on this site is unclear or looks wrong, tell us — we correct it.
Related reading: How we keep counterfeit components out of your build · Instrument calibration: setting intervals you can defend · How to read a datasheet
Quality questions
What documentation ships with my order?
Every shipment includes a commercial invoice and packing list referencing your purchase order and the manufacturer part numbers. On request, at no charge: Certificate of Conformance, manufacturer declaration of conformity (CE/UKCA), country-of-origin statement, datasheets and manuals. Calibration certificates and material certificates (3.1) are quoted per instrument.
How do you verify that a component is genuine?
Primarily by controlling where we buy: the manufacturer or its authorized distributors. When a part must come from another source — typically discontinued items — we qualify the supplier first, require provenance documentation and inspect the goods on arrival: packaging, labels, serial numbers, firmware version and function test where practical.
Can you support our supplier audit or vendor qualification?
Yes. We complete supplier questionnaires, provide company registration documents and describe our processes in writing. Site visits to our Hai Phong office can be arranged.
Do you hold ISO 9001 certification?
We operate a documented quality process as described on this page. Please contact us for the current status of our management-system certification and copies of any certificates you require for your vendor file.