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Samples and acceptance

polycarbonate tube sizes

Use this page to decide what must be checked on a polycarbonate tube sizes sample before a production lot is released. Polycarbonate Tube Sourcing coordinates the sample request. We do not approve the part for the buyer, and we do not publish a size chart as our own.

Approval path for a sizes sample

  1. Measure the pair

    Confirm inner and outer diameter on the coupon. A neighbouring wall is a new request, not a courtesy upgrade.

  2. Write the length

    Cut-to-length versus mill stick must be written. “Standard sizes” is not a configuration.

  3. Record reinforcement and grade

    Reinforcement and the grade documents that will travel with the lot become acceptance conditions.

  4. Keep the later-lot file

    Photograph, measured ID/OD, wall unit and the supplier page stay with the buyer so the next shipment can be compared.

What to check on the sample before it is approved

Geometry

Inner and outer diameter. Wall in inches or millimetres. Straightness and cut quality if the receiving plant will machine the length.

Appearance and UV

Clear versus translucent. Ask whether a UV stabilizer package is on the quoted melt. Tint is not a size.

Documents

Dimensional page for the quoted item. REACH, RoHS or FDA 21 CFR 177 if the receiving plant requires those files on that part — not a company poster.

Who holds which file

Buyer

Keeps the acceptance record: measured sample, allowed substitutes, and whether a recycled-content melt may replace virgin on later lots.

Named factory

Owns manufacture, certificates that name the lot, and any tensile, HDT or UL 94 statement for the quoted grade.

This desk

Issues the same sample request to more than one plant. Does not stamp the sample or store a private discount book.

0 Approved lots stored by this site
1 Written acceptance file the buyer should keep
3 Fields that must match later batches: geometry, grade page, packing

Request a sizes sample on the same axes

Eligibility for any first-order sourcing support is confirmed after product, quantity, destination and requirements are reviewed.

Discuss Sample Needs