Sample Coordination

What We Do

A sample order is the most important risk-reduction step before a full container. We coordinate test piece production, verify the output against your specification, and deliver a pass/fail report — so you know exactly what you’re buying before you commit.

The Sampling Process

1. Spec confirmation — We translate your requirements into factory instructions in Mandarin, with critical dimensions, wall thickness, material grade, and marking requirements documented in writing
2. Sample production — Factory produces 1–3 lengths per DN size. We monitor production timing and confirm the correct resin batch is used
3. Dimensional verification — We measure OD, wall thickness at four points, ovality, and check pipe markings against ISO 4427 or your specified standard
4. Pressure test — Hydrostatic pressure test at 1.5× rated pressure for the required hold time. Test conducted at the factory under our supervision
5. Pass/fail report — Full report with photos, measured dimensions vs. specification, and test results. Delivered within 48 hours of test completion

What You Get

• Dimensional measurement report (OD, wall thickness, ovality)
• Hydrostatic pressure test certificate
• Photos of sample markings and pipe cross-section
• Clear pass/fail recommendation
• If failed: root cause identification and factory response

Common Failure Points We Catch

• Wall thickness at low end of tolerance or below spec
• Incorrect SDR ratio produced despite written confirmation
• Resin grade substitution identified by density or MFI check
• Markings missing or non-compliant with ISO 4427 requirements

Pricing

• Factory sample cost varies (typically $200–800 depending on DN and quantity)
• Coordination and verification fee: $150–300 depending on scope
• Included in full-service commission engagements