Portobello-RMF Engineering Ltd
Direct employees
Turnover (reported)
Regional Markets
Asia, Europe, North America
Nuclear Contracting Tiers
Tier 5: Processors & Fabricators
Tier 3: Original Equipment Manufacturing Organisations


  • ASME
  • ISO 9001:2008

F4N Case Studies

Portobello-RMF Engineering Ltd

Pressure Vessels Heat exchangers & Tanks

Pressure Vessels Heat exchangers & Tanks - Specialist Fabrications


Portobello RMF Engineering Ltd was originally established in 1933, the company is an amalgamation of 2 long established engineering companies formerly know as Portobello Fabrications and RMF Engineering. The companies expertise lies in the design and manufacture of Pressure Vessels, tanks, Shell & Tube heat exchangers, pipework, skid packages and high integrity fabrications. The company has the ability to work in many different materials from carbon steel, stainless steel duplex etc to nickel alloys, titanium, zirconium and tantalum, along with the ability to produce equipment in clad steels. The company operates two fabrication workshops of which one is designated a clean shop and is sued solely for special alloy and stainless steel fabrication. Quality assurance is key to the companies operation and is certified to ISO 9001, ASME U, ISO 3834 and Lloyds Rules.

Products and Services

Product Sector
Pressure Vessels Heat Exchangers & Tanks including Internals Petrochemical & Refining
Tanks Petrochemical & Refining
Materials Tubing & Pipework Petrochemical & Refining
Structural Components Building Nuclear Civil
Containers Transportation & Storage Nuclear Civil
Pressure Vessels Heat Exchangers & Tanks including Internals Marine Commercial & Naval
Pressure Vessels Heat Exchangers & Tanks including Internals Subseas and Offshore
Welding & Welding Systems Petrochemical & Refining

High integrity fabrications, skid packages, pipework

Site Facilities

Shop Floor

1400m2 Both workshops are approx 1400m2 area and both have outdoor storage areas of similar size.

Welding & Cladding

Capability Swing Length Width
Gas Tungsten Arc Welding (GTAW) Min: - - -
Max: - - -
Manual Metal Arc Welding (MMA) Min: - - -
Max: - - -
Submerged Arc Strip Cladding (SASC) Min: - - -
Max: - - -
Submerged Arc Welding (SAW) Min: - - -
Max: - - -
Tube Sheet Welding (Using a laser or GTAW process) Min: - - -
Max: - - -

Inspection / Testing

  • Clean room facilities
  • Non destructive testing - Magnetic Partical
  • Non destructive testing - Radiography
  • Non destructive testing - Ultrasonic
  • Pressure / Hydro Testing
  • Proof Load Testing


  • CAD Design - 2D
  • CAD Design - 3D

Recent Work

Electrochlorination Skid

Scope of Supply: Design and build of Electrochlorination process skid

Design Code: PD5500 Cat 1, NORSOK N-004, Eurocode 3, ASME B31.3
Size: 2500mm Long x 2500mm Wide x 2000mm High (Skid), 8” NB x 12.7mm W/T x 1500mm Long (Vessels)
Weight: 3200 KG (Total)
Materials: Stainless Steel 316L (Structure), Titanium Grade 2 (Pipework/Vessels)
Process: Electrochlorination
Client(s): Cameron/Aker (End User: Statoil)
Project: Visund

Key Challenges: Full design responsibility, management of equipment suppliers, interface of free issue process item. Achievement of high quality fabrication across the range of materials used.
Order received as a direct result of performance and high quality achieved on previous skid packages

Electrochlorination Skid

Duplex Filter Vessels

Scope of Supply: Design and build of 17 Duplex Filter vessels for brackish water treatment

Design Code: PD5500 Cat 1,
Size: 3.8m dia x 13m long
Materials: Duplex stainless steel & Super duplex
Process: Water purification
Client(s): Acciona Agua/ Thames Water
Project: Becton

Key Challenges: Development of duplex to super duplex welding with the Welding Institute, planning construction of 17 large pressure vessels. Management of materials storage and ultimately storage of vessels due to construction delays at site.

Duplex Filter Vessels

Flash Vessel

Scope of Supply: Flash Vessel
Design Code: PD5500,
Size: 2500mm I/D x 6716mm Overall
Weight: 4420 KG
Thickness: 9.53mm (Shell), 12.7mm (Cone), 12.7mm (Dish Head)
Materials: Titanium Grade 7 (major process parts), Titanium Grade 2 (External Attachments), Super Duplex (Removable Internals)
Process: Flash Separator Vessel (Desalination)
Client(s): Cameron (End User: Shell, Bacton Gas Plant)
Project: Bacton Rejuvenation Project

Key Challenges: Development of welding qualifications to comply with client specifications, Finite element analysis of design for vacuum conditions, management of key sub contractors, development of manufacturing procedures to suit materials of construction

Flash Vessel

KIln Barrels

Scope of Supply: 3 off Kiln Barrels
Design Code: ASME Viii Div 1
Size: 0.5m x 6.4m long
Materials: Inconel Alloy 600
Process: Nuclear Fuel Processing
Client(s): Westinghouse
Project: Replacement Units

Key Challenges: Fabrication and machining to tight tolerances, specific controls on welding techniques, heat treatment in vertical orientation, shrink fitting using liquid nitrogen.