TECHNICAL GUIDE / 2026-10-02
Short answer. A brown fused alumina PDS, customer drawing, signed technical specification and batch report serve different purposes. Record the exact revision of each and agree which document controls each parameter. When a drawing or PDS changes, review the order and qualified sample before assuming the change is editorial or automatically accepted.
Name every document's job
The product data sheet identifies a supplier product and its published characteristics. A customer drawing or technical specification may set tighter requirements for a particular wheel, belt or refractory formulation. A purchase order states what will be bought; a batch report records values measured for delivered material. These documents can overlap, but they are not interchangeable. The buyer and supplier should agree which revision governs acceptance and how conflicts will be resolved before an order is placed.
An English CHAOYAN product record and its PDF PDS can help a buyer locate the correct grade and available data. A web page is not a substitute for the signed order specification if an application needs special limits or test methods. If the customer references a drawing number, obtain the drawing revision and a controlled copy. A bare drawing number in an email may point to an older file and leave a supplier unaware of a changed tolerance.
Build a revision cross-reference
Create a short register with product name, F or P prefix or refractory fraction, supplier PDS number and revision, customer drawing number and revision, agreed technical sheet revision, approved sample lot and purchase order. Identify the owner of each document. A supplier should not quietly replace the buyer's drawing with its general PDS; the two may address different characteristics. Likewise, a buyer should not assume an older supplier PDS remains current forever because it was attached to the first RFQ.
Compare parameter names, units and methods across documents. A chemistry limit on a drawing may be a minimum while a PDS shows a typical range. A particle-size table may use a different reporting convention or a different product family. Resolve those differences in a signed technical agreement or documented deviation. Do not let a procurement system merge two unlike fields simply because both are labeled grade or size.
Review changes before release
When the supplier issues a new PDS, obtain a change summary and compare it with the version used in qualification. A revised layout or corrected company spelling may be editorial; a changed material range or product designation may require technical review. The buyer should record the decision, not assume that every new revision is harmless or that every revision forces a full trial. The extent of requalification should follow the risk of the change and the buyer's approved process.
The same rule applies when the customer updates a drawing. Send the new revision to the supplier with an effective date and ask for written acceptance or a deviation. Check stock and open purchase orders against the old requirement. If material has already been produced, decide whether it may be used under the previous approval. Retain the superseded documents so the history of earlier accepted lots remains understandable.
Keep the batch report linked
The batch report should identify the delivered lot and report results against the agreed test requirements. Inspectors need access to the controlling order sheet and method, not only the current website PDS. If a report omits a required parameter, ask for the missing evidence or hold the lot under the quality plan. A lot result that meets an old drawing revision may still fail a new accepted one; the effective date and order link determine which applies.
Store the documents with the sample and receiving record. Where several grades are delivered together, ensure each PDS and report matches its specific product. F36 and P36 may share a number but not the same intended standard or use. A clear cross-reference helps the production team avoid loading the wrong material under a familiar shorthand description. It also helps a supplier answer a later complaint without guessing which specification was in force.
Selection guidance
In a CHAOYAN inquiry, state the product, intended application, customer drawing or technical sheet revision and required supporting records. Request the matching PDS for that exact model, then resolve any parameter differences before confirming the order. The PDS-versus-batch-report guide explains the evidence layers; the RFQ guide helps issue a complete initial request. Maintain a controlled revision register through trial, quotation, order, receipt and repeat purchase. The aim is to buy the material that was actually qualified under the requirements that were actually agreed.
Common mistakes
- Treating the newest website PDS as an automatic replacement for a signed older order sheet.
- Citing a drawing number without a revision or effective date.
- Applying an F product PDS to a P product with the same numeral.
- Releasing a lot against a report that omits a required agreed parameter.
Related technical guidance
Frequently asked questions
Does every PDS revision require a new production trial?
Not necessarily. Review what changed and apply the buyer's risk-based change-control rule. Material or limit changes may require more evidence than editorial corrections.
Can a batch report override a purchase specification?
No. It records what was measured for a lot. The agreed purchase specification defines the acceptance requirement used to judge that result.
