The primary purpose of this pamphlet is to provide practical temperature and pressure criteria which can be used to define chlorine as non-corrosive, which we refer to as "DRY" chlorine for use in carbon steel equipment.  Chlorine that does not meet the criteria of "DRY" will be considered “WET” and will have a moisture content that can cause a rapid corrosion of steel.  The criteria corresponding to "DRY" chlorine must be determined for each chlorine facility.  There isn’t one value of “Dryness” applicable over the entire range of use of chlorine in production and commerce. The pamphlet provides a basis for facilities to determine acceptable moisture limits.   This pamphlet also presents the methods for measuring moisture in chlorine and discusses sources of contamination during sampling and analysis.  Appendix B provides additional information on chlorine sampling.  Appendices C, D, and E provide additional technical information and the basis on the definition of “DRY” chlorine and its effect on corrosion.

(48 pages)

This pamphlet brings together in a single single source all known pertinent, published references on explosive properties of gaseous mixtures containing hydrogen and chlorine. The reaction characteristics of hydrogen mixed with chlorine, oxygen and inert gases information is based on the literature review of reaction characteristics of hydrogen with chlorine and with mixtures of chlorine and oxygen, and represents an attempt to graphically show ignition and detonation zones for the systems hydrogen-chlorine-oxygen and hydrogen-chlorine-air. It also provides guidance on how to practically apply insights from the data and literature to safely operate chlorine liquefaction and other chlor-alkali processes.

(33 pages)

Covers density, volume, vapor pressure, heat capacity ratio, compressibility, enthalpy, entropy, fugacity coefficient, Joule Thompson coefficient, velocity of sound, surface tension, thermal conductivity, and viscosity of chlorine.

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(88 pages)

The intent of this pamphlet is to provide a simplified document to assist chlorine producers/users, local emergency planning committees, fire departments, and municipalities in estimating the area affected by a chlorine release for emergency planning and hazard assessment purposes, and to provide a general understanding of the expectations of chlorine cloud release scenarios.  The Department of Homeland Security (DHS) Chemical Security Analysis Center (CSAC), part of the Science and Technology Directorate (S&T), collaborated with the Chlorine Institute to develop updated guidance in this version of Pamphlet 74, based upon new experimental research into chlorine releases and the associated chemical and physical phenomena. The Hazard Prediction and Assessment Capability (HPAC) model, developed and widely used by the U.S. Government, was used to simulate the release scenarios in this pamphlet to provide new modeling results. 

(189 pages)