ASTM D226, Grade 350 and Printed Pounds: Avoiding False Equivalence
Grade 350, a printed pound number and ASTM D226 are different references. Keep them separate unless evidence for the exact supplied product establishes the relationship required by the buyer.
By Merily Waterproofing · Bulk supply for importers, distributors and building-material wholesalers
Identify the kind of reference
Grade 350 appears in our historical Chinese sample records. A wrapper can carry a pound value or designation. ASTM D226/D226M is a published specification for asphalt-saturated organic felt.
Those facts do not establish a conversion between the references. The official standard’s scope is not proof that a particular supplier’s product complies.
Require the right evidence for a compliance request
If a project names a standard, record the exact designation and applicable requirements. Ask whether the offered product has relevant supporting evidence.
Do not use roll mass, thickness or a similar product photograph as a substitute for compliance documentation.
Keep Merily’s offer accurate
Our paper-based felt is quoted by its offered specification and available documentation. We do not claim ASTM certification or a No.15/No.30 equivalence for the product described here.
If the buyer explicitly requires such a product, identify the gap before issuing a misleading quotation.
Put it in your buying record
| Reference | What it identifies | Not established automatically |
|---|---|---|
| Grade 350 | Historical sample designation | ASTM type equivalence |
| Printed pounds | Label wording or mass statement | Certified product grade |
| Measured kilograms | Mass on a stated basis | Compliance with a standard |
| ASTM D226/D226M | Published specification | Compliance of an untested item |
Questions buyers ask
Can we convert Grade 350 to No.15 or No.30?
No automatic equivalence has been established for this offer.
Does the word ASTM on a label prove compliance?
Verify the actual product evidence and its scope.
Can Merily quote ordinary paper-based felt without that claim?
Yes. State your measurable roll and packing requirements clearly, without attaching an unsupported certification.