Regulatory-compliant steam pipework design dossier (JD Robinson)
JD Robinson required independent mechanical engineering support to replace a corroded section of high-level steam pipework. The replacement was to be installed as three flanged spools due to site constraints, and the client’s insurer required a clear design-code basis, pressure calculations, and defined inspection/testing requirements.
The problem
A failing steam line required replacement, but the installation constraints drove a flanged, pre-fabricated assembly. The insurer required documented evidence of code compliance, wall thickness adequacy, fabrication controls, and a suitable test regime before work could proceed.
Constraints and inputs
- Existing steam system with defined maximum operating pressure from the operator
- Flanged spool design to suit restricted installation conditions
- Requirement for an insurer-acceptable documentation pack
- Clear definition of supports / load paths required for verification
Work performed
- Defined the design basis and applicable code framework for metallic industrial piping
- Wall thickness verification using accepted pressure design methodology (including Barlow-based checks where relevant)
- Flange and pressure capability review appropriate to the duty
- Structural adequacy check of the assembly with stated assumptions on support conditions (including analysis where appropriate)
- Defined inspection and testing specification:
- Welding fabrication standards and qualification requirements
- Non-Destructive Testing (NDT) approach
- Hydrostatic pressure test specification
Deliverables
- Design verification report suitable for insurer review
- Calculation pack (pressure and structural checks)
- Inspection and test specification (weld and pressure testing)
- Declaration of conformity / compliance dossier support
- Guidance for final manufacturing drawing completion by the fabricator
Outcome
JD Robinson obtained an insurer-ready engineering dossier that enabled fabrication and installation to proceed with clear compliance evidence, inspection gates and a defined pressure test approach, reducing programme risk and avoiding avoidable rework.
Adrian Lowes BEng(hons) CEng MIMechE ASME
Adrian Lowes is a Chartered Mechanical Engineer and the founder of Barair Systems Limited, with over two decades of experience delivering innovative engineering solutions.
A graduate of the University of Bradford, he has worked on projects from automated vision systems for the automotive industry to oil and gas research with Cranfield University. He has developed products for brands including Microsoft, ICI, Toyota, and Florette. His expertise spans machinery design, finite element analysis, CE marking, and industrial accident investigation.
A lifelong musician, Adrian has directed Skipton Brass and Brass Ten, and served on the Alumni Committee of the National Youth Brass Band of Great Britain. Based in West Yorkshire, he combines technical precision with creative problem-solving in every project.