📋 Cleanroom Sandwich Panel Procurement: How to Choose a Supplier, Verify Quality & Avoid Scams

🔍 1. Factory Audit Checklist

1.1 Production Line

1.2 Quality Control

1.3 Documentation

🧪 2. How to Verify Quality on Delivery

2.1 Core Density Verification

• Cut a 1m × 1m sample from a panel
• Weigh it and calculate density
• Compare with the specified density in your PO

2.2 Skin Thickness Verification

• Use a digital micrometer to measure skin thickness
• Check both faces of the panel
• Acceptable tolerance: ±0.02mm

2.3 Surface Finish Verification

• Check for scratches, dents, or discoloration
• Use a surface roughness tester (Ra ≤ 0.8µm for GMP)
• Check the cleanroom sandwich panel with flush joint​ — the joint should be perfectly flush

2.4 Dimensional Verification

• Measure panel width, length, and thickness
• Check squareness — diagonal difference should be <2mm

🚨 3. Common Procurement Scams

Scam 1: "We Are a Factory" (But We're a Trader)

Red flag: No production line, no factory photos, no on-site visit allowed

Solution: Always visit the factory or request a live video tour

Scam 2: "Rockwool Core" (But It's Slag Wool)

Red flag: Price is 20% lower than market average

Solution: Request density test + fire test certificate

Scam 3: "Stainless Steel Skin" (But It's Galvanized Steel)

Red flag: Price is too low for stainless steel

Solution: Use a magnet test — stainless steel 304 is non-magnetic

Scam 4: "A-Grade Fire Rating" (But No Certificate)

Red flag: Supplier cannot provide a valid fire test certificate

Solution: Request the certificate before ordering, verify with the issuing lab

Scam 5: "Flush Joint" (But It's Standard Tongue & Groove)

Red flag: Price is too low for a true flush joint system

Solution: Request a sample of the joint profile

🏭 4. Why SAMZOON Passes Every Audit

As a cleanroom sandwich panel Foshan​ manufacturer, SAMZOON provides:

• Dedicated cleanroom panel production line​ — separate from ordinary panel lines
• In-house quality control​ — density, coating, and fire testing on every batch
• Full documentation​ — mill certs, fire test certificates, coating reports
• Transparent pricing​ — itemized quotes with no hidden fees
• Installation support​ — a cleanroom sandwich panel installation guide​ with every order

SAMZOON Product Range:

• Cleanroom sandwich panel with rockwool core
• Cleanroom sandwich panel with PIR core
• Cleanroom sandwich panel with magnesium oxide​ core
• Cleanroom sandwich panel with aluminum honeycomb​ core
• Cleanroom sandwich panel with stainless steel​ skin
• Cleanroom sandwich panel with antimicrobial coating
• Cleanroom sandwich panel with flush joint

✅ 5. Procurement Checklist