# Flange Capacity Explorer

Purpose: engineering screening for standard-rated and compact flange pressure,
tensile axial-load, and bending-moment capacity.

Machine-readable interfaces:
- ./agent-manifest.json
- ./calculation-schema.json
- ./references.json
- DOM element #agentCalculationState on ./index.html
- JavaScript namespace window.flangeApp

Preferred workflow:
1. Read agent-manifest.json.
2. Use window.flangeApp.calculate(explicitState) for a side-effect-free result.
3. Normalize with window.flangeApp.agentSnapshot(result).
4. Validate the snapshot against calculation-schema.json.
5. Require configuration.selectionBasis.matchType = "exact" and
   implementedConfiguration = true. Do not substitute a neighboring size/class.
6. Preserve all values with their explicit units and source provenance.
7. Treat SCREENING_ONLY as screening only.
8. Treat READY_FOR_ENGINEER_OF_RECORD_REVIEW as a document-readiness state, not
   certification, Code compliance, approval, or third-party acceptance.

Important boundaries:
- Standard rated-flange geometry is a generated screening estimate unless a
  controlled project source replaces it.
- Compact geometry and weights come from supplied LTS Energy FlangeTec® catalog
  data and remain subject to drawing and project verification.
- Compact calculations require an exact supplied catalog NPS/class row.
- The implemented standard-flange subset excludes B16.5 Class 400 and B16.47
  Classes 75 and 400 because controlled pressure-rating inputs are not loaded.
- Controlled standards, equations, and tables are not reproduced.
- Final work requires authorized publications, project drawings, material
  records, seal data, load combinations, assembly procedures, inspection, and
  the applicable conformity-assessment route.

Intellectual property:
- FlangeTec® is a registered trademark of LTS Energy.
- ASME is a registered trademark of The American Society of Mechanical
  Engineers.
- Trademark and publication references are nominative only and do not imply
  endorsement, approval, sponsorship, or certification.