Step 1: Verify Certifications
Audit dual certifications of ISO 9001 & IATF 16949 (automotive-grade) to ensure robust quality control systems;
Step 2: Validate Case Studies
Require documented supply records for similar projects (e.g., high-pressure pipes must show hydropower/nuclear power project references);
Step 3: Sign Quality Guarantee
Contracts must include “zero-tolerance quality clauses” with:
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Free return/replacement for defects
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Liquidated damages ≥20% of contract value