This publication is intended to provide useful information concerning chlorine piping for both permanent production and use facilities, as well as temporary transportation systems. This pamphlet's objective is to offer practical suggestions in the selection of material suited for the indicated service. Use of materials other than those recommended herein may be technically desirable in specific producing/consuming sites.

This pamphlet does not intend to override specific technical needs. Underground (buried) chlorine piping system design is beyond the scope of this pamphlet and should be undertaken only by engineers experienced in that field. Recommendations given in CI Pamphlet 60 (13.1) may be a useful reference to the designer.

All parts of this pamphlet should be consulted before deciding on the components of a piping system. Listed are pipe, valves, and fittings suitable for use with dry chlorine in either the liquid or gaseous phase, at temperatures between -150ºF (-101ºC) and 300ºF (149ºC). Guidance regarding dry chlorine can be found in CI Pamphlet 100 (13.1). Material selection based on the recommendations of this pamphlet shall take into consideration the operating conditions and the possible corrosive nature of chlorine, particularly when moisture unintentionally enters systems. Sound engineering principles should be applied in the selection of all equipment.

The Chlorine Institute does not approve, rate, certify, or endorse any product or construction.

It is recognized that facilities built prior to the publication of this edition of this pamphlet may be operating successfully without adhering to all recommendations contained herein. Operators of such facilities should evaluate discrepancies and validate that they do not pose disproportionate risks to safe operation or the environment. Continued operation without adhering to all aspects of this pamphlet is generally acceptable provided that:

• Previous successful, long-term operation coupled with periodic hazard evaluations show that risks to safe operations and the environment are sufficiently low;

• The system does not violate applicable codes or regulations; and

• Consideration is given to modifying the system to meet recommendations contained in this edition of this pamphlet when redesign or replacement projects are planned.