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Journal articles
Magazine articles
Open Access
Continuous digester process safety improvements • Stress corrosion cracking and overpressure protection lessons learned and opportunities, TAPPI Journal October 2024

ABSTRACT: Georgia-Pacific has recent experience with continuous digester stress corrosion cracking (SCC) repairs where the extent of SCC was more than previous spot inspections had predicted (one digester had anodic protection, one did not). This paper offers case studies of reviewed and improved digester inspections by use of “boat” samples to quantify the depth of cracking mechanism. Boat sample test data is used to support repair recommendations based on hardness testing. Georgia-Pacific also reviewed overpressure protection systems and corrected gaps found in these systems. These included updating to the latest original equipment manufacturer (OEM) designs and formalizing functional testing procedures and practices. This review of digester inspection, testing, and repairs since 2020 provides: (1) a basis for including a 3rd party corrosion expert to be a part of inspections; (2) removes the use of power-wire brushes; (3) enhances digester inspection with 100% phased-array ultrasonic testing to detect SCC; and (4) ensures overpressure protection design and testing is aligned with corporate needs and the site-specific challenges.

Journal articles
Open Access
Stainless steel piping for pulp handling and chemical recovery, TAPPI JOURNAL, June 1994, Vol. 77(6)

Stainless steel piping for pulp handling and chemical recovery, TAPPI JOURNAL, June 1994, Vol. 77(6)

Journal articles
Open Access
The use of xylanases in kraft pulp bleaching: a review, TAPPI JOURNAL, June 1994, Vol. 77(6)

The use of xylanases in kraft pulp bleaching: a review, TAPPI JOURNAL, June 1994, Vol. 77(6)

Journal articles
Open Access
Bleaching Mixed Office Waste to High Brightness, TAPPI JOURNAL, March 1994, Vol. 77(3)

Bleaching Mixed Office Waste to High Brightness, TAPPI JOURNAL, March 1994, Vol. 77(3)

Journal articles
Open Access
Initial validation of a mathematical model of cold flow in a recovery boiler, TAPPI JOURNAL, May 1994, Vol. 77(5)

Initial validation of a mathematical model of cold flow in a recovery boiler, TAPPI JOURNAL, May 1994, Vol. 77(5)

Journal articles
Open Access
The use of green liquor and its derivatives in improving kraft pulping, TAPPI JOURNAL, October 1998, Vol.81(10)

The use of green liquor and its derivatives in improving kraft pulping, TAPPI JOURNAL, October 1998, Vol.81(10)

Journal articles
Open Access
Electrodialysis separates a sulfide-rich liquor from mill white liquor, TAPPI JOURNAL, October 1998, Vol.81(10)

Electrodialysis separates a sulfide-rich liquor from mill white liquor, TAPPI JOURNAL, October 1998, Vol.81(10)

Journal articles
Open Access
Improved oxygen delignification for magnesium-based sulfite pulps, TAPPI JOURNAL, October 1998, Vol.81(10)

Improved oxygen delignification for magnesium-based sulfite pulps, TAPPI JOURNAL, October 1998, Vol.81(10)

Journal articles
Open Access
Mass-integration analysis: a technique for reducing methanol and effluent discharge in pulp mills, TAPPI JOURNAL, October 1998, Vol.81(10)

Mass-integration analysis: a technique for reducing methanol and effluent discharge in pulp mills, TAPPI JOURNAL, October 1998, Vol.81(10)

Magazine articles
Open Access
English as a first and second language - part 7: a strategy for spelling, TAPPI JOURNAL, October 1998, Vol.81(10)

English as a first and second language - part 7: a strategy for spelling, TAPPI JOURNAL, October 1998, Vol.81(10)

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