Guidelines for inspection of continuous digesters and impregnation vessels, Technical Information Paper TIP 0402-27 (2015)



Please Note: This document will be available in PDF format in the "My Electronic Documents" link on the home page once your order has been completed. Please make sure you have the latest version of Acrobat Reader. Click on the Acrobat Reader icon to check for the latest version, it’s FREE. To print a hardcopy of a PDF file correctly you must have a postscript printer. If you are not sure if your printer is a postscript printer please refer to your owner’s manual.

Purchase of electronic (downloadable) documents made at www.tappi.org by credit cards, followed by instant download CANNOT be cancelled. We do not offer refunds on electronic download documents.

This Technical Information Paper (TIP) provides guidelines for inspecting digester vessels in alkaline pulping service. Digester vessel refers to a continuous digester or an impregnation vessel in one- and two-vessel systems. These guidelines and procedures also apply to level tanks.

This TIP covers inspection of the code-defined pressure-containing ‘envelope’ and of internal parts, including screens and their support structure, the center-pipe and its supports and the bottom outlet device/scraper. The TIP discusses preparing for inspection, inspecting the shell and nozzles for cracking and corrosion, inspecting internal components, and how to record the inspection findings and data. The TIP does not cover inspection of M&D and batch digesters – inspection of the latter is covered in a separate TIP.

These guidelines supplement jurisdictional regulations for pressure vessel inspection. This TIP contains no guidance for inspecting associated external piping, auxiliary systems such as liquor heaters, flash tanks, steaming vessel, the sand separator and pressure limiting devices. This TIP does not help the reader interpret inspection data or assess the continuing “fitness for service” of a digester vessel, which can be done as described in API 579-1/ASME FFS-1, Fitness for service (1) post-construction code, which is accepted by the National Board Inspection Code (NBIC).

Guidelines for inspection of continuous digesters and impreg
Guidelines for inspection of continuous digesters and impregnation vessels, Technical Information Paper TIP 0402-27 (2015)
53.00

New Releases

TAPPI PRESS Catalog eBook 2024


Experience the Power of Publications in the 2024 TAPPI Press Catalog


Open


 

Kraft Recovery Boilers, Third Edition  


Sponsored by the Recovery Boiler Program R&D Subcommittee of the American Forest & Paper Association (AF&PA) and published by TAPPI Press.


Purchase


 

Handbook For Pulp and Paper Technologists (The SMOOK Book), Fourth Edition

The best-selling text to introduce the entire technology of pulp and paper manufacture.

Purchase

 

Guidelines for Safe Assessment and Operation of Yankee Dryers  


A project of the Yankee Dryer Safety & Reliability Committee.

Purchase

 

Check our newest additions.


TAPPI Press offers some of the most in-depth resources and references for the forest products and related industries. 

See More

   
 

Available for Purchase – Conference Proceedings


TAPPI maintains a record of key conference papers, presentations, and other conference publications, available for purchase in a variety of formats.

See More