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HOME > FAQ > Q7: What are the color difference control standards for pre-coated coils?

Q7: What are the color difference control standards for pre-coated coils?

Quality Control System:

Color calibration with a German X-Rite spectrometer (ΔE ≤ 1.5)

Samples retained for comparison after each batch

Custom RAL/KON color charts supported

Previous page: Q8: Are technical documents provided?

Next page: Q6: Can you assist with customs clearance at the port of destination?

Q1: What are the main ports and shipping times for Southeast Asian routes?
Core routes covered:
Vietnam (Haiphong/Ho Chi Minh Port): Direct sailing time of 5-7 days
Indonesia (Jakarta/Surabaya): Transit time of 8-10 days
Philippines (Manila): Weekly sailing time of 7-9 days
Note: Vessel tracking service is provided throughout the entire journey.
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Q2: How does high-strength galvanized steel sheet cope with coastal corrosion environments?
Technical solution:
Zinc layer thickness ≥ 120μm + aluminum-zinc-magnesium composite coating (AZ150)
Salt spray test > 1200 hours (compliant with ISO 9227)
PV project performance in coastal Vietnam (zero corrosion in level 8 salt spray environment)
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Q3: Do you provide export certification services?
Certifications Supported:
Basic Certifications: CE, SGS, CO Certificate of Origin
Regional Certifications:
Middle East: SASO/GCC
Southeast Asia: SNI (Indonesia), TISI (Thailand)
Russian-speaking Region: GOST
Process: Submit requirements → Material pre-screening → Third-party inspection → Certificate delivery
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Q4: How is a quality dispute handled?
Three-Step Response Mechanism:
1. Submit video evidence within 48 hours of arrival
2. Commission SGS/BV for on-site inspection
3. Negotiate a solution after confirming responsibility
Full processing time: ≤15 working days
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Q5: What is the minimum order quantity (MOQ) requirement?
Flexible Policy:
Coils/Sheets: 1 x 20-foot container
Pipes/Profiles: 5 tons (Multi-category LCL supported)
Sample Service: Free standard color charts/material test pieces
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Q6: Can you assist with customs clearance at the port of destination?
Provide a full set of customs clearance documents (Bill of Lading/Packing List/Certificate of Origin)
Partnered customs clearance agent coverage:
Ho Chi Minh Port, Vietnam  Jeddah Port, Saudi Arabia  Jakarta Port, Indonesia
Free tariff optimization consultation in the RCEP region
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mikey@rongxinsteel.com

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