Read 17-ROC-2002-Dry Chemical Extinguishing Systems text version

Report of the Committee on Dry and Wet Chemical Extinguishing Systems Edward J. Kaminski, Chair Schirmer Engineering Corporation, NV [SE] John H. Lawlor, Secretary Keystone Fire Protection Company, PA [IM] Rep. National Association of Fire Equipment Distributors Inc. Paul E. Buchhofer, Building Inspection Underwriters, Inc., PA [E] Samuel S. Dannaway, S. S. Dannaway Associates, Inc., HI [SE] Jack K. Dick, Heiser Incorporated, NY [M] Alan L. Hall, Loss Prevention Consultants, Inc., IL [SE] Robert Kasiski, Factory Mutual Research Corporation, MA [I] William Klingenmaier, Tyco Suppression Systems, WI [M] George A. Krabbe, Automatic Fire Controls Inc., AZ [IM] Rep. Fire Suppression Systems Association Roland J. Land, Risk Control Consultants, LLC, NJ [SE] Michael P. McGreal, Firedyne Engineering, PC, IL [SE] J. R. Nerat, Badger Fire Protection/Williams Holdings, MI [M] Rep. NFPA Industrial Fire Protection Section James Shea, Kidde-Fenwal, Inc., MA [M] Rep. Fire Equipment Manufacturers' Association Richard A. Shiraishi, Kemper Insurance Companies, CA [I] Craig Voelkert, Amerex Corporation, AL [M] Kenneth W. Zastrow, Underwriters Laboratories Inc., IL [RT] Alternates Richard J. Biehl, Tyco Suppression Systems, WI [M] (Alt. to W. Klingenmaier) Richard L. Lupien, Kidde-Fenwal, Inc., MA [M] (Alt to J. Shea) Norbert W. Makowka, National Association of Fire Equipment Distributors, IL [IM] (Alt. to J. H. Lawlor) James J. Urban, Underwriters Laboratories Inc., IL [RT] (Alt. to K. W. Zastrow) Charles F. Willms, Fire Suppression Systems Association, NC [M] (Alt. to G. A. Krabbe) Nonvoting Walter M. Haessler, The Carlotta, CA (Member Emeritus) Edward D. Leedy, Naperville, IL (Member Emeritus)

Staff Liaison: James D. Lake Committee Scope: This Committee shall have primary responsibility for documents on the design, installation, operation, testing, maintenance, and use of dry and wet chemical extinguishing systems for fire protection. This list represents the membership at the time the Committee was balloted on the text of this edition. Since that time, changes in the membership may have occurred. A key to classifications is found at the front of this book. The Technical Committee on Dry and Wet Chemical Extinguishing Systems is presenting two Reports for adoption, as follows: Report I of this Report on Comments was prepared by the Technical Committee on Dry and Wet Chemical Extinguishing Systems, and documents its action on the comments received on its Report on Proposals on NFPA 17, Standard for Dry Chemical Extinguishing Systems, 1998 edition, as published in the Report on Proposals for the 2002 May Meeting. NFPA 17 has been submitted to letter ballot of the Technical Committee on Dry and Wet Chemical Extinguishing Systems, which consists of 16 voting members. The results of the balloting, after circulation of any negative votes, can be found in the report. Report II of this Report on Comments was prepared by the Technical Committee on Dry and Wet Chemical Extinguishing Systems, and documents its action on the comments received on its Report on Proposals on NFPA 17A, Standard for Wet Chemical Extinguishing Systems, 1998 edition, as published in the Report on Proposals for the 2002 May Meeting. NFPA 17A has been submitted to letter ballot of the Technical Committee on Dry and Wet Chemical Extinguishing Systems, which consists of 16 voting members. The results of the balloting, after circulation of any negative votes, can be found in the report.

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NFPA 17 -- May 2002 ROC -- Copyright, NFPA

NFPA 17 (Log #9) 17-1-(2-5) : Accept in Principle SUBMITTER: Charles F. Willms, Willms Assoc., Inc./Rep. Fire Suppression Systems Association COMMENT ON PROPOSAL NO:17-7a RECOMMENDATION: These comments include changes to Proposal 1717a (Log CP2) and to the basic parameters used for piping design described in Section 2.5. The comments include reference to the use of a new Pipe Design Handbook, recently published by the Fire Suppression Systems Association (FSSA), for use in the design of special hazard fire suppression system piping (including dry chemical systems). The FSSA Pipe Design Handbook provides detailed, comprehensive guidelines on how to apply the ASME B31.1 Power Piping Code (PPC) in the selection of acceptable types of piping where the ASME PPC is specified. These comments also include new and revised Appendix material related to Section 2.5. Because of this interrelationship, comments to Section 2.5 and the Appendix material for this section, along with additions to the list of publications in Chapter 10, are all included in this one submittal. Revise and reword Section 2.5 to read as follows: 2.5 Pipe and Fittings 2.5.1* General. Pipe and fittings shall be noncombustible material having physical and chemical characteristics such that their integrity under stress can be predicted with reliability. The pipe, fittings, and connection joints shall withstand the maximum expected pressure in the piping system. 2.5.1.1 Pipe and fittings shall be galvanized steel, stainless steel, copper, or brass. Special corrosion-resistant materials or coatings shall be required in severely corrosive atmospheres. Black steel pipe and fittings shall be permitted in non-corrosive atmospheres. 2.5.1.2 For pre-engineered systems, pipe, tubing and fitting materials and types shall be in accordance with the manufacturer's listed installation and maintenance manual. 2.5.1.3 For all other systems, the thickness of the piping shall be calculated in accordance with the ASME B31.1, Power Piping Code, 1998 Edition (including B31.1a 1999 Addenda, and B31.1b 2000 Addenda). In performing the calculations, the guidelines provided in FSSA publication titled, Pipe Design Handbook for Use With Special Hazard Fire Suppression Systems, shall be followed. The internal pressure used for this calculation shall not be less than the maximum pressure in the agent container at a storage temperature of not less than 130°F greater of either of the following values: (1) The normal charging pressure in the agent container at 70°F. (2) 80 percent of the maximum pressure in the agent container at a maximum storage temperature of not less than 130°F. 2.5.1.3.1 If higher storage temperatures are approved for a given system, the internal pressure used for the calculation shall be adjusted to the maximum pressure in the container at the higher temperature, using the B31.1 Power Piping Code specified in 2-5.2.2 2.5.1.3. 2.5.2 Cast iron pipe and fittings, steel pipe conforming to ASTM A120, Specifications for Pipe, Steel, Black, and Hot-Dipped Zinc Coated, Welded and Seamless for Ordinary Uses, aluminum pipe, or nonmetallic pipe, shall not be used. 2.5.3* Flexible piping (hose) shall be used only if specified in the manufacturer's listed installation and maintenance manual. 2.5.4 Other types of pipe and fittings that have been investigated and listed for this service shall be permitted to be used. The use of such pipe and fittings shall involve careful consideration of the following factors: (a) Pressure rating (b) Corrosion (chemical and electrolytic) (c) Methods of joining (d) Resistance to fire exposure and rapid temperature changes (e) Flow characteristics Add new Appendix A.2.5.1; delete existing A.2.5.1.1; retain A.2.5.3 (no changes); all to read as follows: A.2.5.1 Piping should be installed in accordance with good commercial practice. Care should be taken to avoid possible restrictions due to foreign matter, faulty fabrication, or improper installation. The piping system should be securely supported with due allowance for agent thrust forces, thermal expansion and contraction, and should not be subjected to mechanical, chemical, vibration, or other damage. The ASME B31.1, Power Piping Code, should be consulted for guidance on this matter. Where explosions are likely, the piping should be attached to supports that are least likely to be displaced. Although dry chemical piping systems are not subjected to continuous pressurization, provisions should be made to ensure that the type of piping installed can withstand the maximum stress at maximum storage temperatures. A.2.5.3 The piping for a dry chemical system embodies distinctive features necessitated by the characteristics of the agent. The use of flexible piping or hose in a dry chemical system introduces a number of factors to be considered that do not normally affect rigid piping. The most important of these is the nature of any changes of direction. The minimum radius of curvature for any flexible hose to be used in a dry chemical system is usually shown in the listing information for a particular system. Other areas of concern that are evaluated in the test for listing are resistance to the effects of vibration, flexure, tension, torsion, temperature, flame, compression, and bending. It is also necessary for the hose to have the strength to contain the dry chemical during discharge and to be made of materials that will be resistant to atmospheric corrosion. Add additional ASME Publication to 10.1.2.2 10.1.2.2 ASME Publications. American Society of Mechanical Engineers, 345 East 47th Street, New York, NY 10017. ASME, Unified Pressure Vessel Code, 1989. ASME, B31.1, Power Piping Code, 1998 edition, including B31.1a 1999 Addenda, and B31.1b 2000 Addenda. Add new 10.1.2.5 10.1.2.5 FSSA Publication. Fire Suppression Systems Association, 5024-R Campbell Boulevard, Baltimore, Maryland 21236-5974. FSSA Pipe Design Handbook for Use With Special Hazard Fire Suppression Systems, first edition, June 2001. SUBSTANTIATION: · Proposal 17-7a (Log CP2) specifies use of the ASME B31.1 Power Piping Code (PPC), but does not provide any guidelines on how to use the PPC to design dry chemical systems piping. · The requirements specified in 2.5.1.3 (1) and 2.5.1.3 (2) of this comment, to determine the minimum design working pressure for the system piping, follows the same design criteria currently specified in Section 2.2.1.1 of NFPA-2001. · The addition of the Fire Suppression System Association (FSSA) Pipe Design Handbook into the mandatory requirements, provides the user with comprehensive guidelines, data, pressure tables, etc., that enables the system designer to select the proper piping/tubing for use in a wide variety of dry chemical system applications where the ASME B31.1 PPC is specified. · Precedence has already been established in NFPA Standards, where other documents or publications are referenced as part of the mandatory requirements of the Standards. It is the intent to add the FSSA Pipe Design Handbook to this list of publications referenced in Chapter 10 of NFPA 17. · The FSSA Pipe Design Handbook is recognized in the fire protection industry as the most comprehensive handbook of its kind for use in the design of piping for special hazard fire suppression systems, where the ASME B31.1 Power Piping Code is specified. The handbook has been reviewed and endorsed by many of the fire suppression equipment manufacturers and designer-installer members of the Fire Suppression Systems Association. Note: Supporting material available for review upon your request at NFPA Headquarters. COMMITTEE ACTION:Accept in Principle Add an asterisk to the proposed 2.5.1.3 and above the underlined language proposed for section the annex and reword as follows: A.2.5.1.3 In performing the calculation, the guidelines provided in the FSSA publication titled Pipe Design Handbook for Use with Special Hazard Fire Suppression Systems should be consulted for guidance. Change the FSSA reference from Chapter 10 to Annex B. COMMITTEE STATEMENT: The committee agrees with the intent of the submitter and the need for additional guidance. However, the introduction of the FSSA handbook into mandatory language was considered new material. Instead the committee decided to refer to the document as a tool for design and place it in the annex. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE:16 VOTE ON COMMITTEE ACTION: AFFIRMATIVE: 15 NOT RETURNED: 1 Buchhofer (Log #1) 17-2-(2-9) : Accept SUBMITTER: Richard J. Kennedy, Detroit Edison Co./Rep. ASME B31.1 Power Piping Code Committee COMMENT ON PROPOSAL NO:17-13 RECOMMENDATION: Revise text to read as follows: 2.9 Storage Containers. The dry chemical containers used in these systems shall be designed to meet requirements of the U.S. Department of Transportation (DOT) or Transport Canada (TC) if used as shipping containers under pressure. If not shipping containers under pressure, they shall be designed, fabricated, inspected, certified, and stamped in accordance with Section VIII of the ASME Unfired Boiler & Pressure Vessel Code, Section VIII "Rules for Construction of Pressure Vessels"; independent inspection and certification is recommended. The design pressure shall be suitable for the maximum pressure developed at 130°F (55°C) or at the maximum controlled temperature limit. SUBSTANTIATION: The ASME Code is referenced incorrectly. The B31.1 Code is an ANSI standard which is copyrighted, maintained, and published by ASME. The correct reference is ANSI/ASME B31.1 "Power Piping"-1998, including addenda or simply ASME B31.1 "Power Piping". ASME address has changed to Three Park Ave., Times, NY 10016. COMMITTEE ACTION:Accept COMMITTEE STATEMENT: This change will effect the new 4.9.2 as found in Proposal 17-13 (Log #CP11). Though the substantiation does not appear to address the actual proposed change, the committee agrees with the intent of the change. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE:16 VOTE ON COMMITTEE ACTION: AFFIRMATIVE: 15 NOT RETURNED: 1 Buchhofer --------------------------------17-3-(3-8.3.3) : Reject SUBMITTER: Jim Everitt, COMMENT ON PROPOSAL NO:17-12 (Log #10) ---------------------------------

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NFPA 17 -- May 2002 ROC -- Copyright, NFPA

RECOMMENDATION: Revise as follows: 3.8.3.3 The dry chemical container and expellant gas assemblies shall be located where they will be accessible for inspection, maintenance, and service. Dry chemical containers and expellant gas assemblies shall not be placed above a ceiling. SUBSTANTIATION: This comment better clarifies the original intent of our original proposal. The assemblies should not be placed above a ceiling where it cannot be supervised and checked without difficulty. COMMITTEE ACTION:Reject COMMITTEE STATEMENT: The provisions of this section already state that the equipment must be accessible for inspection. It is recognized that some installations may be in difficult places but access can still be provided in a reasonable manner. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE:16 VOTE ON COMMITTEE ACTION: AFFIRMATIVE: 15 NOT RETURNED: 1 Buchhofer --------------------------------(Log #6) 17-4-(4-4.3) : Reject SUBMITTER: R. T. Leicht, Delaware State Fire Marshal's Office COMMENT ON PROPOSAL NO:17-13 RECOMMENDATION: Delete the words, "prior to fuel or power being restored". The text would read merely as follows: Shutoff devices shall require manual resetting. SUBSTANTIATION: The additional wording is superfluous and suggests that manual reset of shutoff devices can occur some other way. If a shutoff device could be reset AFTER fuel or power had been restored then the device isn't really a shutoff. COMMITTEE ACTION:Reject COMMITTEE STATEMENT: The current language of the standard is clear on the intent of the provision. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE:16 VOTE ON COMMITTEE ACTION: AFFIRMATIVE: 15 NOT RETURNED: 1 Buchhofer --------------------------------(Log #8) 17-5-(7-4.1) : Accept SUBMITTER: R. T. Leicht, Delaware State Fire Marshal's Office COMMENT ON PROPOSAL NO:17-36 RECOMMENDATION: Revise Exception No. 2 by ending with the word ACTUATION and place the following in the Annex: "The fire extinguishing systems have been tested under both zero and high-velocity and therefore the exhaust fans and dampers need not shut down upon actuation of the fire extinguishing systems." SUBSTANTIATION: The Manual of Style mandates that the body of the Standard be reserved for the actual requirement. The additional wording, which provides good information and guidance, should be placed in the Annex. COMMITTEE ACTION:Accept COMMITTEE STATEMENT: Committee action on Proposal 17-42 (Log #CP16) edited this paragraph taking out the unenforceable language. Accepting this comment will place the language in a new Annex note to 9.3.5.2. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE:16 VOTE ON COMMITTEE ACTION: AFFIRMATIVE: 15 NOT RETURNED: 1 Buchhofer --------------------------------(Log #7) 17-6-(9-3.5.3) : Reject SUBMITTER: R. T. Leicht, Delaware State Fire Marshal's Office COMMENT ON PROPOSAL NO:17-42 RECOMMENDATION: Delete the words, "prior to fuel or power being restored". The text would read merely as follows: Shutoff devices shall require manual resetting. SUBSTANTIATION: The additional wording is superfluous and suggests that manual reset of shutoff devices can occur some other way. If a shutoff device could be reset AFTER fuel or power had been restored then the device isn't really a shutoff. COMMITTEE ACTION:Reject COMMITTEE STATEMENT: The current language of the standard is clear on the intent of the provision. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE:16 VOTE ON COMMITTEE ACTION: AFFIRMATIVE: 15 NOT RETURNED: 1 Buchhofer (Log #2) 17-7-(10-1.2.2) : Accept SUBMITTER: Richard J. Kennedy, Detroit Edison Co./Rep. ASME B31.1 Power Piping Code Committee --------------------------------COMMENT ON PROPOSAL NO:17-5 RECOMMENDATION: Revise text to read as follows: 10.1.2.2 ASME Publication. American Society of Mechanical Engineers,345 East 47th Street Three Park Avenue, Times,NY 1001710016. ASME Unfired Boiler & Pressure Vessel Code. 1989 1998, Section VIII. SUBSTANTIATION: The ASME Code is referenced incorrectly. The B31.1 Code is an ANSI standard which is copyrighted, maintained, and published by ASME. The correct reference is ANSI/ASME B31.1 "Power Piping"-1998, including addenda or simply ASME B31.1 "Power Piping". ASME address has changed to Three Park Ave., Times, NY 10016. COMMITTEE ACTION:Accept COMMITTEE STATEMENT: This change will effect the new Chapter 2 as found in Proposal 17-5 (Log #CP9). Though the substantiation does not appear to address the actual proposed change, the committee agrees with the intent of the change. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE:16 VOTE ON COMMITTEE ACTION: AFFIRMATIVE: 15 NOT RETURNED: 1 Buchhofer --------------------------------(Log #3) 17-8-(A-2-5.1.1) : Accept SUBMITTER: Richard J. Kennedy, Detroit Edison Co./Rep. ASME B31.1 Power Piping Code Committee COMMENT ON PROPOSAL NO:17-1 RECOMMENDATION: Revise text to read as follows: A.2.5.1.1 Piping and fittings used in systems should be of a type for which the maximum system pressures will not cause material stress greater than the material's yield point when calculated in accordance with ANSI ASME B31.1, Power Piping Code. SUBSTANTIATION: The ASME Code is referenced incorrectly. The B31.1 Code is an ANSI standard which is copyrighted, maintained, and published by ASME. The correct reference is ANSI/ASME B31.1 "Power Piping"-1998, including addenda or simply ASME B31.1 "Power Piping". ASME address has changed to Three Park Ave., Times, NY 10016. COMMITTEE ACTION:Accept NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE:16 VOTE ON COMMITTEE ACTION: AFFIRMATIVE: 15 NOT RETURNED: 1 Buchhofer (Log #4) 17-9-(B-1-2.1) : Accept SUBMITTER: Richard J. Kennedy, Detroit Edison Co./Rep. ASME B31.1 Power Piping Code Committee COMMENT ON PROPOSAL NO:17-1 RECOMMENDATION: Revise text to read as follows: B-1.2.1 ANSI Publication. American National Standards Institute, Inc., 11 West 42nd Street, 13th Floor, Times, NY 10036. ANSI B31.1, Power Piping Code, 1986. SUBSTANTIATION: The ASME Code is referenced incorrectly. The B31.1 Code is an ANSI standard which is copyrighted, maintained, and published by ASME. The correct reference is ANSI/ASME B31.1 "Power Piping"-1998, including addenda or simply ASME B31.1 "Power Piping". ASME address has changed to Three Park Ave., Times, NY 10016. COMMITTEE ACTION:Accept NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE:16 VOTE ON COMMITTEE ACTION: AFFIRMATIVE: 15 NOT RETURNED: 1 Buchhofer --------------------------------(Log #5) 17-10-(B-1-4) : Accept SUBMITTER: Richard J. Kennedy, Detroit Edison Co./Rep. ASME B31.1 Power Piping Code Committee COMMENT ON PROPOSAL NO:17-1 RECOMMENDATION: Revise text to read as follows: B-1.4 ASME Publications. American Society of Mechanical Engineers, Three Park Avenue, Times, NY 10016. ASME B31.1, Power Piping, 1998. SUBSTANTIATION: The ASME Code is referenced incorrectly. The B31.1 Code is an ANSI standard which is copyrighted, maintained, and published by ASME. The correct reference is ANSI/ASME B31.1 "Power Piping"-1998, including addenda or simply ASME B31.1 "Power Piping". ASME address has changed to Three Park Ave., Times, NY 10016. COMMITTEE ACTION:Accept NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE:16 VOTE ON COMMITTEE ACTION: AFFIRMATIVE: 15 NOT RETURNED: 1 Buchhofer -----------------------------------------------------------------

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