Sulphuric Acid (93%) Storage Tank and Piping System, Catalyst Paper

Allnorth provided detailed engineering and design services for the repair and upgrades to the 93% sulphuric acid system at Catalyst Paper’s Crofton pulp and paper mill. Equipment and piping had been damaged by a piping failure within the containment area and required a fast-track approach to repair the system. During the outage, approximately 300 feet of lined piping was installed as part of the upgrade to the distribution network. Allnorth worked closely with the mill engineering group and mill trades to design a system that included an upgraded distribution network and acid-unloading system, modifications and improvements to the acid storage tank, two new variable speed pumps, and new instrumentation to provide improved system control.

Allnorth’s responsibilities for this project included:

  • Process engineering
  • Mechanical engineering
  • Piping design


About this pulp and paper project

Catalyst Paper’s Crofton pulp and paper mill is located on southern Vancouver Island, near Duncan, British Columbia. Crofton is an integrated paper and pulp manufacturing division. Major products include newsprint, directory paper and kraft pulp, which is used to manufacture printing, writing and tissue papers.

Services in this project

Mechanical Engineering

Allnorth provides comprehensive mechanical and piping engineering services to industrial projects. Our in-house  multidisciplinary expertise allows Allnorth to offer integrated service packages for clients in multiple sectors.

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Process Engineering

Allnorth provides integrated process engineering service packages for industrial projects. We recognize that downtime is expensive for our clients, so our teams specialize in retrofitting new systems into existing operations with minimal disruption.

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