ISO 9001 is the baseline certificate for a quality management system, and most serious engineering exporters hold it. IATF 16949 is the standard for automotive suppliers, and it is required by most vehicle makers and many tier-one buyers. Other certificates depend on your product and sector.
A certificate tells you that a system exists and was audited. It does not prove that every part shipped is good. Use certificates to filter suppliers, then check the shop floor.
The main certificates
- ISO 9001 covers quality management systems and applies to any industry.
- IATF 16949 adds automotive requirements such as PPAP, control plans and customer-specific rules on top of ISO 9001.
- ISO 14001 covers environmental management and is often asked for by larger buyers.
- ISO 45001 covers occupational health and safety management.
- AS9100 is the quality standard for aerospace and defence suppliers.
- ISO 3834 sets quality requirements for fusion welding, relevant to fabricated structures and pressure parts.
- ISO/IEC 17025 applies to testing and calibration laboratories, including a factory's in-house lab.
Product certifications are different
System certificates are about how a factory works. Product certifications are about what it makes. A pump may need a BIS mark for sale in India, CE marking for Europe, or UL or CSA listing for North America. A pressure vessel may need a code stamp. These are separate from ISO 9001.
Make sure the product certificate covers the exact model you are buying, not just a similar one in the range. For Europe, see CE marking for machinery.
How to check a certificate
Ask for a copy and read it carefully. Check the company name and address match the factory you are buying from. Check the scope, which says which products and processes are covered. Check the expiry date.
Then verify it. Look up the certification body and check that it is accredited by a recognised accreditation body. Many certification bodies and the IAF CertSearch database let you check a certificate online. Fake and expired certificates do circulate, and a quick check catches most of them.
For IATF 16949, the IATF keeps its own database of valid certificates. Ask the supplier for its IATF certificate number so you can confirm it.
What matters more than paper
A small workshop without ISO 9001 can still make excellent parts, and a certified factory can still ship bad ones. What matters is whether the factory controls its processes, calibrates its gauges and records what it checks. An audit shows this, as set out in how to audit an engineering factory.
If your customer requires a certificate, treat it as a must-have. If not, weigh it alongside what you see on the shop floor.
Next step
We verify certificates and check whether the system works on the shop floor. Book a free sourcing review.