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Metadata library policy

Purpose

This site may provide structured metadata you maintain or derive for engineering work (standard identifiers, versions, supersession relationships, piping material specification rules, project snapshots, and export manifests). It does not replace official publications.

No distribution of third-party PDFs

We do not provide original standard specifications, standard atlases, design manuals, product catalogs, professional books, professional literatures, or other engineering reference PDF files to third parties through this website. Users must obtain licensed copies from authorized publishers or rights holders.

Your responsibilities

Engineering decisions remain yours (or your organization’s). Use critical judgment and comply with applicable laws, contracts, and employer policies.

Updates

Structured data may change without notice; verify against authoritative sources before relying on it for regulated work.