DIRECT ANSWERProcess design owns the service and governing operating/upset cases; mechanical design converts approved inputs into a pressure-boundary design; fabrication builds and verifies that approved design. Contract terms can reassign design work, but inputs, approvals and liability must be explicit.
Design-responsibility split
- Process duty, relief and fluid properties
- Mechanical calculations, materials and drawings
- Fabrication methods, inspection and test
- Change authority and final data handover
Relevant manufacturing capability
- Drawing, datasheet and equipment-list manufacturability review
- Self-manufactured and coordinated-supply scope identification
- Technical, quality, document and delivery clarification
Key notes
- A fabricator cannot responsibly infer missing process cases from the equipment name.