Design and construction

Design and construction

With over 150 years’ in-depth experience in the UK and international markets, Altrad Motherwell Bridge is a world leader in designing and constructing storage tanks and gasholders. Our highly-skilled and experienced employees work closely with our customers to understand their specific project requirements to develop safe, cost-effective and industry-leading solutions.

Oil and liquids storage

Formerly Cape Motherwell Bridge, Altrad Motherwell Bridge is one of the very few storage tank contractors to retain an in-house storage tank design team, with all its attendant benefits. 

Our storage tanks are manufactured and delivered on-site for construction by our highly skilled personnel, many of whom have been with the company for more than 25 years.

Many larger engineering companies would need to sub-contract storage tank construction resulting in significantly increased costs for you. By contracting directly with Altrad Motherwell Bridge, you save money and, with our unparalleled experience, can rest assured we will construct on time and on budget.

Our capabilities

  • Storage tank design and inspection to API 650, API 620, EN14015, API 653 and EEMUA 159
  • Design, supply and construction of new tanks
  • Storage tank and repair and maintenance
  • Floating roof design
  • Fixed roof design
  • Storage tank assessments
  • Failure investigations
  • Design verification
  • Tank repairs
  • Tank jacking
  • Structural design
  • Mechanical equipment selection
  • Relief valve sizing and selection


Altrad Motherwell Bridge’s Clayton Walker Gasholder division is one of a small group of companies across the globe with the capability of providing solutions for low-pressure gas storage.

As gas storage requirements are different from one process to the next, from site to site and region to region, each gasholder project is addressed with the highest regard to detail, ensuring the final, bespoke design solution completely satisfies customer and local requirements.

Our construction services typically include on-site technical support, covering all variations of shop, site, testing and commissioning activities. In providing these services we are able to provide experience-based advice and assistance to our customers with respect to construction methodology, build and welding techniques, manning levels, scheduling, inspection, testing and quality control.

Where capital has not been available to fund a new build and conversion is a feasible long-term alternative, complete solutions can be provided to fully transform gasholders of poor performing and out-dated technology to the superior Wiggins type concept.  We have also carried out partial conversions where “best-available-technology” or know-how with a long-proven track record on other gasholder designs is retro-fitted to enhance the gasholder’s performance.

Through our continuous development programme we can assure our customers receive industry-leading gasholder products and services encompassing the current best-available technologies at the time.

Clayton Walker Gasholder’s expertise covers:

  • Water-sealed, Oil-sealed (MAN type) and Dry-sealed (Wiggins type) gasholders
  • Gasholder conversions
  • Retro-fits to gasholders
  • Gasholder maintenance, repairs and overhauls
  • Bespoke and statutory inspection services
  • Troubleshooting and failure investigations
  • Gasholder design verification
  • Structural design
  • Piping design
  • Gasholder instrumentation
  • Technology development and improvement
  • Hazardous area classification and operation/identification
  • ATEX assessment of gasholders