Project Detail

Recovery Boiler Screen Tube Replacement


Scope of Work

Cianbro, as the boilermaker contractor, was responsible for staging, cleaning, and installing 20, 12-tube screen platens into the #1 Recovery Boiler. This entailed a detailed rigging plan, multiple welding procedures as well as intense quality control and hold points. Nearly 450 welds were made over the course of two and a half weeks, with approximately a 3 percent X-ray rejection rate. All welds Cianbro performed were volumetrically examined and passed inspection.

Project Details

  • Cleaned, prepared, and rigged 20 partial 12-tube screen platens into the boiler
  • Fabricated 240, two-inch screen tube welds
  • Fabricated 168, 1.5-inch water-wall tube welds
  • Fabricated 22, six-inch heavy wall bottle header welds

Lean, Innovative, and Unique Project Solutions

The rigging system utilized inside the boiler was a "high-line" system that allowed "trolleying" of the platens across the boiler. The installation and removal were much less involved than a fixed rigging beam or other fixed member.