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2011 Gaseous and Particulate Contamination Guidelines for Data Centers (ASHRAE TC 9.9 White Paper)

ASHRAE · ASHRAE TC 9.9

The 2011 ASHRAE TC 9.9 contamination white paper; its silver and copper corrosion-rate limits were later carried into Thermal Guidelines 5th edition.

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Overview

This document is the 2011 updated white paper from ASHRAE Technical Committee 9.9 on gaseous and particulate contamination in data centres. It updates the 2009 version already in the library. It appears in the bibliography of ASHRAE Handbook-HVAC Applications 2019, Chapter 20, as the 2011 TC 9.9 contamination white paper, and it is hosted as a free PDF in ASHRAE's Publication Errata and Updates library.

According to the record, its silver and copper corrosion-rate thresholds were later carried into Thermal Guidelines 5th edition, which uses coupon limits of silver below 200 and copper below 300 angstroms per month. An ASHRAE facility survey described in the 2015 Handbook indicates that silver corrosion rate is a better predictor of corrosion-related failures than copper. These thresholds give the air-quality assessment a numeric basis and feed humidity limits and filtration choices.

Although it can be downloaded free, ASHRAE holds all rights and prohibits entering its publication content into AI tools. The document was therefore not read in full; only the library record's citation data and short paraphrased facts were used. Readers needing the detailed classification tables should consult the original. Its scope and classification details cannot be stated with certainty without the original text; this summary only indicates where to find it and why it matters.

Key points

  1. The document is the 2011 ASHRAE TC 9.9 gaseous and particulate contamination white paper, updating the 2009 version.
  2. It is listed in the bibliography of ASHRAE Handbook-HVAC Applications 2019, Chapter 20.
  3. Thermal Guidelines 5th edition uses coupon limits of silver below 200 and copper below 300 angstroms per month.
  4. Silver corrosion rate predicts corrosion-related failures better than copper (ASHRAE facility survey).
  5. It is hosted as a free PDF in ASHRAE's Publication Errata and Updates library.
  6. The full text was not read here; only record data was used.

Using it in design

  • Take corrosion-coupon classification as a site air-quality input; it drives humidity limits and filtration recommendations.
  • For sites using air-side economizers, assess MERV and chemical filtration needs against corrosion coupon results.
  • In a corrosion monitoring plan, use silver and copper coupons together and treat the silver result as the leading indicator of failure risk.

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Who should read it

Cooling designers and facility operators deciding on air-side economizers, humidity control and filtration.

Related standards

  • ANSI/ISA-71.04
  • ISO 14644-1

Publication details

Authors
ASHRAE TC 9.9
Publisher
ASHRAE
Year
2011
Document number
TC 9.9 White Paper
Document language
English
Source type
Standard
Access
Free to read
Licence
Copyright retained; citation only — the publisher’s terms apply to the original document
Original licence note

Free download from ASHRAE but (c) ASHRAE, all rights reserved; ASHRAE also prohibits entering its publication content into AI tools. Metadata/citation only; facts limited to short paraphrase.

Citation

ASHRAE TC 9.9 (2011). 2011 Gaseous and Particulate Contamination Guidelines for Data Centers (ASHRAE TC 9.9 White Paper). ASHRAE. TC 9.9 White Paper. https://www.ashrae.org/File%20Library/Technical%20Resources/Publication%20Errata%20and%20Updates/2011-Gaseous-and-Particulate-Guidelines.pdf

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