Report on Proposals F2007 Copyright, NFPA NFPA 59

Transcription

1 Nonvoting LP-Gases at Utility Gas Plants Bruce A. Schwartz, Vienna, VA John L. Ritzmann, Chair (Member Emeritus) Consultant, VA [SE] William J. Young, Secretary Superior Energy Systems, Ltd., OH [M] Richard G. Fredenburg, State of North Carolina, NC [E] James R. Goodchild, Xcel Energy Inc., MN [U] Rep. American Gas Association Richard A. Hoffmann, Hoffmann & Feige, NY [SE] Stanley T. Kastanas, US Department of Transportation, DC [E] Jerry W. Lucas, Heritage Propane, OK [IM] Rep. National Propane Gas Association Thomas J. Macdissi, Metropolitan Utilities District, NE [U] Charlie G. McDaniel, GE Insurance Solutions, WV [I] Robert G. McNulty, Washington Gas Light Company, VA [U] Nancy C. Pehrson, CenterPoint Energy, Inc., MN [U] Kevin L. Ritz, Baltimore Gas & Electric Company, MD [U] Steven D. Ruffcorn, Standby Systems, Inc., MN [M] David J. Stainbrook, Engineered Controls International, Inc., NC [M] James H. Stannard, Jr., Stannard & Company, NJ [SE] Herbert F. Zepp, Smith & Norrington Engineering Corporation, NH [SE] Alternates David Bortnem, Duke Energy, OH [U] (Alt. to Thomas J. Macdissi) William R. Copes, Baltimore Gas & Electric Company, MD [U] (Alt. to Kevin L. Ritz) Swapan Kumar Hazra, Hindustan Aegis LPG Bottling Co., Ltd., India [U] (Alt. to Nancy C. Pehrson) Michael Lee Stroud, Vectren Energy Delivery Inc., IN [U] (Alt. to James R. Goodchild) Bruce J. Swiecicki, National Propane Gas Association, IL [IM] (Alt. to Jerry W. Lucas) Staff Liaison: Theodore C. Lemoff Committee Scope: This Committee shall have primary responsibility for documents on the design, construction, location, installation, operation, and maintenance of refrigerated and nonrefrigerated liquefied petroleum gas plants to the point of introduction into the utility gas distribution system or those plants that are subject to the requirements of Title 49, Code of Federal Regulations, Part 192, Pipeline Safety Law, issued pursuant to the laws in 49 U.S.C. et seq. 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 Report of the Technical Committee on LP-Gases at Utility Gas Plants is presented for adoption. This Report was prepared by the Technical Committee on LP-Gases at Utility Gas Plants and proposes for adoption, amendments to NFPA 59, Utility LP-Gas Code, 2004 edition. NFPA is published in Volume 4 of the 2006 National Fire Codes and in separate pamphlet form. This Report has been submitted to letter ballot of the Technical Committee on LP-Gases at Utility Gas Plants, which consists of 16 voting members. The results of the balloting, after circulation of any negative votes, can be found in the report. 59-

2 _ 59-1 Log #79 Final Action: Reject (1.1 Scope) _ Submitter: Mike Osmundson, Lexicon Propane Group Recommendation: Add a new paragraph under 1.1 Scope: Installations that deliver undiluted LP-Gas vapor to two or more customers shall conform to NFPA 58 Liquefied Petroleum Gas Code. Revise the definition of Utility Gas Plant to read: Utility Gas Plant. A plant that stores and vaporizes LP Gas for distribution A fuel gas distribution facility that supplies multiple customers either LP-Gas or LP-Gas gas/air mixtures to a gas distribution system of 10 or more customers. as a supplemental fuel to natural gas or other fuel gas. Add a new paragraph to the Annex: A Some LP-Gas installations which deliver fuel to multiple customers fall under the jurisdiction of the Department of Transportation regulations under 49 CFR Part 192. These LP-Gas systems shall conform to NFPA 58 Liquefied Petroleum Gas Code. Substantiation: This proposal concerns the appropriate application of either NFPA 59 or NFPA 58 to LP-Gas vapor distribution systems and suggests changes to paragraphs 1.1 and The authors recommend that the changes to both paragraphs be considered by the committee as a whole and that the same action be taken on both paragraphs. The proposal is formulated based on certain facts and assumptions as listed: 2. A manual was prepared for the United States Department of Transportation, Research and Special Programs Administration, Office of Pipeline Safety by the National Association of Regulatory Utility Commissioners. The guide entitled, Training Guide for operators of Small LP Gas Systems also refers to NFPA 58 as the only standard which applies to vapor distribution systems. For the 2001 edition of NFPA 59, a proposal was made and accepted to change the definition of the term Utility Gas Plant. This sentence was added: In the United States, utility gas plants are subject to the requirements of Part 192 of the Code for Federal Regulations (49 CFR Part 192). The substantiation given for this proposal was The definition of Utility Gas Plant is revised to be consistent with actual practices. With respect to utility peak shaving plants, this proposal had no impact, however, utility peak shaving plants are not the only LP systems subject to 49 CFR Part 192. Most vapor distribution systems are also subject to Part 192. Changing the definition of Utility Gas Plant had the effect of changing the scope of NFPA 59 and moving the coverage of vapor distribution systems from NFPA 58 to NFPA 59. In effect, the scope of NFPA 59 was changed indirectly and this change is causing unintended consequences. A thorough review of the impact of this change has not been done. The authors of this proposal believe that NFPA 58 should be the governing standard for vapor distribution systems for the following reasons: 1. Vapor distribution systems being discussed here are gas systems which deliver un-diluted LPG vapor as a fuel gas to equipment, dwelling units, or facilities either not owned or not controlled by the person or organization that operates the LPG storage and distribution portions of the system. 2. There are potentially thousands of LPG vapor distribution systems in the US which are impacted by this discussion. For example, the states of New Hampshire, Maine, and Vermont have a combined total of over 1,000 vapor distribution systems. 3. Most vapor distribution systems are on the small end of the scale, delivering gas to relatively few customers. 4. The basic purpose of NFPA standards is to guide users and regulators in methods to minimize the risks inherent in specified activities. 5. The application of NFPA 58 or 59 is mutually exclusive. Only one of these standards governs any specific installation or activity. 6. The intention or requirements of 49 CFR Part 192 is not a direct concern of the application of NFPA 58 or The hazards inherent in operating an LPG vapor distribution are adequately addressed under NFPA 58. This includes storage, transfers, equipment design, installation, fire protection, and operations and maintenance. Any hazards related to delivering a fuel gas to multiple customers are addressed under 49 CFR Part 192 and do not need to be covered by NFPA. 2. When the definition of Utility Gas Plant was changed for 2001 and again for 2004, no information was provided with the proposals showing that NFPA 58 was inadequate in addressing the hazards of vapor distribution systems. The change was made without a thorough review of the effects. 3. Ken Wood of ETS Associates has extensive regulatory experience with vapor distribution systems and based on his experience, in the United States, 49 states currently approve and inspect vapor distribution systems under NFPA 58. Nevada uses NFPA 59 because Nevada rate-regulates these systems. 4. System owners and local AHJs responsible for approving or inspecting LPG systems are not aware of the change in scope between the standards because a user must read NFPA 59 in order to determine that vapor distribution systems do not fall under NFPA 58. Background: NFPA 58 was the original LPG standard first published in NFPA 59 was published beginning in 1949 and was clearly intended for natural gas or manufactured gas distribution utilities for peak shaving purposes. The introduction to the early versions of NFPA 59 states: Public utilities have been concerned about the shortage and steadily increasing demands for gas. To meet the problem, the utilities have increasingly turned to liquefied petroleum gas as a stand-by means to meet peak load requirements. The NFPA Standards on Liquefied Petroleum Gases (NFPA No. 58) as prepared by the Committee on Gases and published herein and in NFPA-NBFU pamphlets No. 58 were used as a general guide until these separate standards were adopted in Since the majority of all types of LPG installations in the United States fall under the scope of NFPA 58, there is far more experience and knowledge in the industry with this standard than with NFPA As a guide to users and regulators to reducing the risks at LPG installations, NFPA 59 presents much less information than NFPA 58. A substantial number of requirements appropriate to the safe operation of LPG systems are not specified in NFPA 59 but appear in NFPA Since many of the vapor distribution systems are owned by small operators and regulators often have multiple responsibilities, any assistance NFPA can give in understanding their standards is helpful. NFPA 58 has an excellent handbook available while NFPA 59 does not. From 1949 forward, vapor distribution systems were governed by NFPA 58 based on each State having the authority to determine which organizations were utilities and which were not. No guidance was given within NFPA 58 or 59 on this definition. The industry consensus was that NFPA 59 considered a utility to be a municipal or investor organization delivering natural gas or manufactured gas to large numbers of customers. This means that vapor distribution systems were included in NFPA 58 since they were excluded from NFPA 59. In 1970, the Federal Government established rules governing transportation of gas. In these rules, the term operator is used for organizations which transport gas. The term utility is not used but many operators are utilities. Since the DOT regulations also include very small gas distribution systems as operators, the definition of the word utility became muddied when compared to NFPA. Since confusion was arising on the subject of which standard applied to vapor distribution systems, two resources targeted to regulators, inspectors, and users addressed this issue: 1. An article was written by Ken Wood and Richard Marini to clarify which LP systems are jurisdictional. This article was published and included as Supplement 2 in the 1998, 2001, and 2004 Editions of the NFPA 58 Handbook and clearly identifies NFPA 58 as the governing standard. 8. The NFPA 58 committee has not felt the need to require relief valve testing for non-utility systems regardless of size. To move the coverage of vapor distribution systems under NFPA 59 will require all of these systems to test or replace relief valves every five years. For systems which must operate 24 hours a day, 365 days per year, changing relief valves will be a significant hardship since only the largest systems have Multiport style relief valves. A substantial portion of vapor distribution systems use one or more 1,000 gallon tanks for storage. Changing relief valves in all of these tanks every five years may actually increase the hazard at these installations. The proposed changes to paragraph definition of utility gas plant, remove references to 10 or more customers to prevent confusion with CFR 192. A reference to multiple customers is used to exclude industrial LP/air standby systems. Note: While not contained in this proposal, the authors of this proposal suggest that suitable language be inserted into NFPA 58 to identify NFPA 58 as governing vapor distribution systems. This is intended to allow readers to confirm which standard applies to vapor distribution systems without the necessity of reading both. Mike Osmundson of Lexicon Propane Group, Ken Wood of ETS Associates, and Chris Mohler of Chesmont Engineering are joint authors of this proposal. This is not original material; its reference/source is as follows: Material developed by proposal authors and others in the LP Gas industry. 59-2

3 are made or where LP-Gas is vented to the atmosphere in the course of transfer operations. [58:3.3.54] Portable Tank (or Skid Tank). A container of more than 1000-lb (454-kg) water capacity that is mounted on skids or runners, is equipped with protected container appurtenances, and is used to transport LP-Gas. [58:3.3.57] Pressure Relief Device. A device designed to open to prevent a rise of internal pressure in excess of a specified value due to emergency or abnormal conditions. [58:3.3.58] psi. Pounds per square inch. [58:3.3.59] psia. Pounds per square inch, absolute. [58:3.3.60] psig. Pounds per square inch gauge. [58:3.3.61] First-Stage Regulator. A pressure regulator for LP-Gas vapor service designed to reduce pressure from the container to 10.0 psig (69 kpag) or less. [58: ] UL. Underwriters Laboratories Inc. [58:3.3.0] Excess-Flow Valve (or Excess-Flow Check Valve). A valve designed to close when the liquid or vapor passing through it exceeds a prescribed flow rate. [58: ] * Internal Valve. A container primary shutoff valve having the following features: (1) The seat and seat disc remain inside the container so that damage to parts exterior to the container or mating flange does not prevent effective sealing of the valve; (2) The valve is designed for the addition of a means for remote closure and is also designed for automatic shutoff when the flow through the valve exceeds its maximum rated flow capacity or when pump actuation differential pressure drops to a predetermined point. [58: ] Pressure Relief Valve. A type of pressure relief device designed to both open and close to maintain internal fluid pressure. [58: ] Vaporizing Burner (Self-Vaporizing Liquid Burner). A burner that also vaporizes liquid LP-Gas prior to burning it. [58:3.3.74] Water Capacity. The amount of water at 60 F (16 C) required to fill a container. [58:3.3.77] Substantiation: Terms are used within NFPA 59 but are not defined in Chapter 3. in Part Accept all the proposed definitions except: Cylinder, Diameter, Vehicle Fuel Dispensers, DOT, Fixed Piping System, Magnetic Gauge, Piping System, First Stage Regulator, and Vaporizing Burner. Committee Statement: The terms not accepted are not used in NFPA Log #8 Final Action: Accept (3.3.2 Container) _ Complete extraction reference to read [58:3.3.14]. Committee Meeting Action: Reject Committee Statement: The committee disagrees with the addition of fuel gas distribution system to the definition. Fuel gas distribution systems are not within the scope of NFPA 59. The proposed deletion of 10 or more customers will cause confusion and expand the definition to facilities other than intended. Comment on Affirmative: RITZMANN, J.: Although I am affirming the committee s actions, I would welcome further discussion on this subject in the form of comments to reconsider or to consider additional changes to this statement of Scope. The changes that were made in the previous edition were an attempt to eliminate applying the code to some facilities but not others based on the ownership of the facility. Ownership was not seen as a relevant safety issue. There was no conscious attempt to expand or limit the applicability of the regulations. I believe this needs to be discussed further by representatives of all facets of the industry to resolve any outstanding dissention Log #7 Final Action: Accept in Part (Chapter 3) _ Recommendation: Add the following definitions to Chapter 3: API. American Petroleum Institute. [58:3.3.4] ASME. American Society of Mechanical Engineers.[58:3.3.6] ASME Code. The American Society of Mechanical Engineers Boiler and Pressure Vessel Code.[58:3.3.7] ASME Container. A container constructed in accordance with the ASME Code.[58:3.3.8] ASTM. American Society for Testing and Materials.[58:3.3.9] Cargo Tank. A container that is used to transport LP-Gas as liquid cargo and is either mounted on a conventional truck chassis or is an integral part of a cargo transporting vehicle.[58:3.3.11] Container Appurtenances. Devices installed in container openings for safety, control, or operating purposes.[58:3.3.15] Cylinder. A container constructed in accordance with U.S. Department of Transportation specifications, Title 49, Code of Federal Regulations.[58:3.3.17] Diameter. The length of a straight line passing through the center of a circle, terminating at the periphery. Vehicle Fuel Dispenser. A device or system designed to transfer and measure LP-Gas into engine fuel and mobile containers on vehicles.[58: ] DOT. U.S. Department of Transportation.[58:3.3.22] Fixed Piping System. Piping, valves, and fittings permanently installed in a location to connect the source of the LP-Gas to the utilization equipment.[58:3.3.25] Gallon. U.S. Standard. 1 U.S. gal = Imperial gal = 231 in.3 = L.[58:3.3.27] Fixed Liquid Level Gauge. A liquid level indicator that uses a positive shutoff vent valve to indicate that the liquid level in a container being filled has reached the minimum point at which the indicator communicates with the liquid level in the container.[58: ] Fixed Maximum Liquid Level Gauge. A fixed liquid level gauge that indicates the liquid level at which the container is filled to its maximum permitted filling limit.[58: ] Float Gauge. A gauge constructed with an element installed inside the container that floats on the liquid surface and transmits its position to a device outside the container to indicate the liquid level.[58: ] Magnetic Gauge. See Float Gauge. Rotary Gauge. A variable liquid level gauge consisting of a small positive shutoff vent valve located at the outside end of a tube that has a bent end inside the container and can be manually rotated to determine the liquid level in the container. It is equipped with a pointer and an outside dial to indicate the liquid level.[58: ] Slip Tube Gauge. A variable liquid level gauge in which a relatively small positive shutoff valve is located at the outside end of a straight tube, normally installed vertically, that communicates with the container interior.[58: ] ICC. U.S. Interstate Commerce Commission.[58:3.3.32] Industrial Occupancy. Includes factories that manufacture products of all kinds and properties devoted to operations such as processing, assembling, mixing, packaging, finishing or decorating, and repairing. [58:3.3.34] kpa. Absolute pressure in kilo-pascals. [58:3.3.35] kpag. Gauge pressure in kilo-pascals. [58:3.3.36] Maximum Allowable Working Pressure (MAWP). The maximum pressure at which a pressure vessel is to operate is described by the ASME Boiler and Pressure Vessel Code. [58:3.3.40] MPa. Absolute pressure in mega-pascals. [58:3.3.45] MPag. Gauge pressure in mega-pascals. [58:3.3.46] Piping Systems. Pipe, tubing, hose, and flexible rubber or metallic hose connectors with valves and fittings made into complete systems for conveying LP-Gas from one point to another in either the liquid or the vapor state at various pressures. [58:3.3.53] Point of Transfer. The location where connections and disconnections Log #9 Final Action: Accept (3.3.5 Fire Protection) _ Fire Protection for the purposes of this code standard shall be defined in the broad sense to include fire prevention, fire detection, and fire suppression. [58:3.3.24] Substantiation: Change makes extraction text identical. Reference is made specific. _ 59-5 Log #10 Final Action: Accept (3.3.6 Gas) _ Liquefied petroleum gas in either the liquid or vapor state. The more specific terms liquid LP-Gas or vapor LP-Gas are normally used for clarity. [58:3.3.28] Substantiation: Change makes extraction text identical. Reference is made specific.

4 59-6 Log #11 Final Action: Accept (3.3.7 Gas-Air Mixer) _ Log #19 Final Action: Accept Recommendation: Complete extraction reference to read [58:3.3.29]. ( Vaporizer) _ Recommendation: Complete extraction reference to read [58:3.3.73] Log #12 Final Action: Accept (3.3.8 Liquefied Petroleum Gas) _ Log #20 Final Action: Accept Recommendation: Complete extraction reference to read [58:3.3.37]. ( Direct-Fired Vaporizer) _ Recommendation: Complete extraction reference to read [58: ] Log #13 Final Action: Accept (3.3.9 Mounded Container) _ Log #21 Final Action: Accept Recommendation: Complete extraction reference to read [58:3.3.43]. ( Electric Vaporizer) _ Recommendation: Complete extraction reference to read [58: ] Log #14 Final Action: Accept ( psia) _ Log #22 Final Action: Accept Recommendation: Complete extraction reference to read [58:3.3.60]. ( Direct Immersion Electric Vaporizer) _ Recommendation: Complete extraction reference to read [58: ] Log #15 Final Action: Accept ( psig) _ Log #23 Final Action: Accept Recommendation: Complete extraction reference to read [58:3.3.61]. ( Indirect Electric Vaporizer) _ Recommendation: Complete extraction reference to read [58: ] Log #16 Final Action: Accept ( Refrigerated LP-Gas) _ Log #24 Final Action: Accept Recommendation: Complete extraction reference to read [58:3.3.63]. ( Indirect (or Indirect-Fired) Vaporizer) _ Recommendation: Complete extraction reference to read [58: ] Log #17 Final Action: Accept ( Sources of Ignition) _ Log #25 Final Action: Accept Recommendation: Complete extraction reference to read [58:3.3.67]. ( Waterbath (or Immersion-Type) Vaporizer) _ Recommendation: Complete extraction reference to read [58: ] Log #18 Final Action: Accept ( Special Protection) _ Recommendation: Complete extraction reference to read [58:3.3.68]. 59-4

5 and valves Log #CP6 Final Action: Accept (3.x Permitted) _ Log #26 Final Action: Accept Submitter: Technical Committee on LP-Gases at Utility Gas Plants, ( ) Recommendation: Add a new definition extracted from NFPA 58: Permitted. Allowed or acceptable, and not requiring a permit (a document granting permission) to be secured. Substantiation: To add a definition of a term used in the code. _ Recommendation: Delete The installation of lightning protection equipment shall not be required on LP Gas storage containers. [58: ] Substantiation: The section is redundant to the wording in Committee Statement: Accept the proposal and delete A Log #5 Final Action: Reject (4.1, 4.9, 7.9, , , (5), , (B)(4), (A)(O), , (7), ) _ Log #27 Final Action: Accept in Principle Submitter: Denyse DuBrucq, AirWars Defense ( ) Recommendation: Revise or add the following sections: in emergency procedures. Persons should know and understand use of Liquid Nitrogen portable and fixed fire control procedures and when each technique is appropriate. This training Regardless of source of ignition, were an explosion to occur or fire break out, Liquid Nitrogen fire control methods shall be employed to control, contain and end the crisis. 7.9 Protection of facility and its contents using Liquid Nitrogen will quell fires instantly and gel or solidify spillage for quick recovery and containment. It will freeze closed pipes spilling forth product, gaseous or liquid, so they can be capped or repaired immediately. Knowledge of location of portable units throughout the facility must be known to gather them to the scene of a crisis. Fixed Liquid Nitrogen Crisis Control equipment feeder locations and directing of Liquid Nitrogen flow procedures must be known and used by building personnel and local fire department personnel All buildings routinely storing and housing usage of gas products must be equipped with fixed Liquid Nitrogen crisis control equipment with instructions on its use and configuration to serve locations within posted on walls and in manual for local fire department Loading docks for trucks shall have portable Liquid Nitrogen crisis control equipment, and, where appropriate, fixed Liquid Nitrogen fire control installed (5) Location of portable Liquid Nitrogen crisis control equipment and instruction in use; and use, direction of flow and fire department instructions for fixed Liquid Nitrogen fire control systems Maintenance of portable Liquid Nitrogen crisis control equipment _ Recommendation: Delete Grounding and bonding shall not be required on LP Gas systems. [58: ] Substantiation: The section is in direct conflict with long established in Principle 1. Revise to read: * Grounding and bonding for static protection shall not be required on LP-Gas systems. 2. Revise A to read: A Because liquefied petroleum gas is contained in a closed system of piping and equipment, the system need not be electrically conductive or electrically bonded for protection against static electricity. [58: A ] Static grounding or bonding protection is not required where tank cars, tank vehicles, or marine equipment are loaded or unloaded by conductive or nonconductive hose, flexible metallic tubing, or pipe connections through or from tight outlets (top or bottom) where both halves of metallic couplings are in contact. For information on grounding and bonding for protection against static electricity, see NFPA 77, Recommended Practice on Static Electricity. 3. Delete A Committee Statement: The concept of the proposal is accepted and reference to static electricity is added. Relevant annex text from A is relocated. includes topping off Liquid Nitrogen twice a week being sure to top off every Log #28 Final Action: Accept in Principle unit on the premises and carried on vehicles associated with the premises. ( ) (B)(4) Fire protection Liquid Nitrogen or water systems (A)(O) Crisis control possible with portable Liquid Nitrogen equipment, and with fixed Liquid Nitrogen equipment with fire department _ Liquid Nitrogen supply. (This should precede (1) because once the shut down Fixed electrical equipment and wiring installed within a classified area or isolation occurs one cannot get in to control the situation with Liquid specified in Table shall be installed in accordance with NFPA 70, Nitrogen and you lose all the contents.) National Electrical Code. Fixed electrical equipment and wiring installed Leakages in piping may be repaired with freezing the contents in the within the classified areas specified in Table shall comply with Table pipe if a valve cannot stop leakage so repair or capping can be carried out and shall be installed in accordance with NFPA 70, National Electrical using portable Liquid Nitrogen equipment. Code, for hazardous locations. Substantiation: The text from was better suited for this section, and is (7) NFPA XX, Standard for fixed Liquid Nitrogen crisis control specific to hazardous locations. equipment. in Principle Nitrogen drowning must be recognized and its remedy defined in all Revise text to read as follows: personnel safety training opportunities Fixed electrical equipment and wiring installed within the classified If there is no odor, no cause for the individual to be passed out in a working areas specified in Table shall comply with Table and shall be environment, the person discovering the situation should yell to notify others installed in accordance with NFPA 70, National Electrical Code. and immediately get breathing equipment for him/herself and for the victim. Committee Statement: Accepted with the deletion of for hazardous Put the breathing apparatus on. Then approach the victim, install the breathing apparatus and begin artificial respiration. If no breathing apparatus is available use large plastic bags to contain fresh air for oneself and for the victim. Tie the locations, which is redundant. filled bag over one s face and have material to do the same to hold the filled bag of gas over the victim s face tying loosely at the neck so as not to strangle the victim. Then apply artificial respiration. Once victim is breathing, help him/ Log #82 Final Action: Accept in Principle in Part her up and take him from the location or carry victim out and get professional (Table , , , , , 5.9.3, , 8.2.3, ) EMT help to evaluate the victim s condition. _ THIS SHOULD BE POSTED ANYWHERE NITROGEN GAS CAN BE Submitter: Steven D. Ruffcorn, Standby Systems, Inc. Recommendation: Eliminate all dependencies within NFPA 59 upon nonextracted NFPA 58 provisions. Apparently affected NFPA 59 sections: Table RELEASED IN ITS PURE FORM. The above statement may be placed in the Annex A section, Explanatory ; ; ; ; ; 5.9.3; ; 8.2.3; ; *; Material, but it would be more noticed and useful in the text of the Code itself ; and Substantiation: One should be able to capture by extreme cooling if escaping Substantiation: Goal: Make NFPA 59 a complete, standalone resource. from tank, pipeline, or gas line if leak is evident to prevent explosion and *Note: A current proposal by this submitter for revising 59: eliminates repair part to quell by O2 starvation and cooling. one dependency. Note: Supporting material is available for review at NFPA Headquarters. Following are mandatory provisions of NFPA which include Committee Meeting Action: Reject Committee Statement: The proposal does not provide information on how the proposed system would work, nor its applicability to propane fire fighting. The reference to non-extracted text from NFPA This proosal seeks to eliminate NFPA 59 s dependency in this regard and thus create a complete, stand alone resource. This effort could extend to NFPA 59 s Appendices too. A use of liquid nitrogen could cause brittle failure of metal propane containers 59-5

6 current proposal by this submitter for revising 59: and extracting 58: as a new 59: eliminates one dependency. (Note: The following text was extracted from a review of this subject first published on January 24, 2005.) Table Electrical Area Classification...Footnote C... See A [of NFPA 58]. [58: Table ] The provisions of shall not apply to fixed electrical equipment at residential or commercial installations of LP Gas systems or to systems covered by Section 6.21 [of NFPA 58].[58: ] Only electrical lighting shall be used with the vehicles covered by this chapter. Wiring shall be insulated and protected from physical damage. Electrical equipment installed on LP-Gas cargo tank vehicles shall comply with Section 9.2 [of NFPA 58]. [58: ] When the provisions of through [of NFPA 58] are met, the minimum distance from an ASME container to a building shall be reduced by one-half for ASME containers of 2001 gal through 30,000 gal (7.6 m3 through 114 m3) water capacity. [58:6.3.2] Where all the provisions of Section 6.24 [of NFPA 58] are complied with, the minimum distances from important buildings and the line of adjoining property that can be built upon to underground and mounded ASME containers of 2001 gal through 30,000 gal (7.6 m3 through 114 m3) water capacity shall be reduced to 10 ft (3.0 m). [58: ] ASME Container Appurtenances. The provisions in through shall be required for ASME containers of 2001 gal through 30,000 gal (7.6 m3 through 114 m3) water capacity referenced in Section 6.24 [of NFPA 58]. [58:6.24.3] At cargo tank vehicle and railroad tank car transfer points, protection shall be provided in accordance with Section 6.10 [of NFPA 58] using approved emergency shutoff valves or backflow check valves or a combination of the two. [58: ] Structure or Building Heating. Heating shall be by steam or hot water radiation or other heating transfer medium, with the heat source located outside of the building or structure (see Section 6.20 [of NFPA 58]), or by electrical appliances listed for Class I, Group D, Division 2 locations, in accordance with NFPA 70, National Electrical Code. [58:10.2.3] Heat exchangers for waterbath vaporizers shall be equipped with a spring-loaded pressure relief valve that provides a relieving capacity in accordance with [of NFPA 58]. Fusible plug devices shall not be used. [58: ] Shutoff valves shall not be installed between pressure relief devices and the container unless a listed pressure relief valve manifold meeting the requirements of [of NFPA 58] is used. [58: ] If mounding is used, the provisions of of NFPA 58, Liquefied Petroleum Gas Code, shall constitute adequate protection If burial is used, the provisions of of NFPA 58 shall constitute adequate protection. in Principle in Part 1. Revise Table , Note c to read: (c) See A Reject any change to Reject any change to Accept in Principle the proposed change to Accept in Principle the proposed change to Accept in Principle the proposed change to Revise to read: At cargo tank vehicle and railroad tank car transfer points, protection shall be provided in accordance with Section 6.10 [of NFPA 58] using approved emergency shutoff valves or backflow check valves or a combination of the two. [58: ] 8. Accept in Principle the proposed change to Accept in Principle the proposed change to Accept in Principle the proposed change to Accept in Principle the proposed change to Accept in Principle the proposed change to Committee Statement: 1. The Annex text referred to is in NFPA 59, and the reference is provided. 2. Paragraph has been deleted in Proposal (Log #29). 3. Paragraph has been deleted in Proposal (Log #30). 4. Refer to Proposal (Log #CP2). 5. Refer to Proposal (Log #40). 6. Refer to Proposal (Log #CP3). 7. Reference to NFPA 58 is deleted and reference to identical text in NFPA 59 is added. 8. Refer to Proposal (Log #49). 9. Refer to Proposal (Log #54). 10. Refer to Proposal (Log #80). 11. Refer to Proposal (Log #75). 12. Refer to Proposal (Log #75) Log #29 Final Action: Accept ( ) _ Recommendation: Delete The provisions of shall not apply to fixed electrical equipment at residential or commercial installation of LP Gas systems or to systems covered by Section 6.21 (of NFPA 58). [58: ] Substantiation: The section is extracted from 58 and does not apply to Utility Gas Plants Log #30 Final Action: Accept ( ) _ Recommendation: Delete Electrical equipment installed on LP-Gas cargo tank vehicles shall comply with Section 9.2 (of NFPA 58). [58: ] Substantiation: The section is extracted from 58 and does not apply to Utility Gas Plants Log #31 Final Action: Accept in Principle (4.5.3) Recommendation: Delete the following from section and replace with text as outlined Open flames or other sources of ignition shall not be used or installed in pump houses, cylinder filling rooms, or other similar locations Direct-fired vaporizers or indirect-fired vaporizers attached or installed adjacent to gas-fired heat sources shall not be installed in pump houses or cylinder filling rooms Open flames, cutting or welding tools, portable electric tools, and extension lights capable of igniting LP-Gas shall not be installed or used within classified areas specified in Table * Open flames or other sources of ignition shall not be prohibited where LP-Gas facilities have been purged of all liquid and vapor. Move existing text in 4.8 and renumber to fit in section Smoking and nonprocess ignition sources within the protective enclosure shall be prohibited, unless in accordance with The owner shall identify, using sound engineering judgment, hazardous areas where smoking and other sources of ignition shall be prohibited except in accordance with through Smoking shall be permitted only in designated and properly signposted areas Welding, cutting, hot work, use of portable electric tools and extension lights, and similar operations shall be conducted only at times and places specifically authorized Welding and cutting shall be conducted in accordance with the provisions of NFPA 51B, Standard for Fire Prevention During Welding, Cutting, and Other Hot Work. Portable electric tools and extension lights capable of igniting LP-Gas shall not be permitted within the classified areas specified in Table Portable electric tools and extension lights capable of igniting LP-Gas shall be permitted where the LP-Gas facilities have been freed of all liquid and vapor or where special precautions are observed under carefully controlled conditions Vehicles and other mobile equipment that constitute potential ignition sources shall be prohibited within diked areas or within 50 ft (15 m) of containers that contain LP-Gas, flammable liquids, or flammable refrigerants, except where specifically authorized and under constant supervision or where loading or unloading at facilities specifically designed for the purpose * 4.5.5* If stray currents are present or if impressed currents are used on loading and unloading systems (such as for cathodic protection), protective measures shall be taken to prevent ignition. A.4.8.6* A For additional information, see API RP 2003, Protection Against Ignitions Arising out of Static, Lightning and Stray Currents * Open flames or other sources of ignition shall not be prohibited where LP-Gas facilities have been purged of all liquid and vapor. [58: ] Substantiation: Section is redundant or in direct conflict with the sections under 4.7 and For example; is covered by , is covered in 4.7.1, is covered in , is covered in Also replaced the text in with verbiage that will permit owners to better identify the areas of concern for this section. Also A was brought forth out of the Annex. Should delete reference on to old A

7 in Principle 1. Revise Section to read: Smoking shall be permitted only in designated and sign posted areas Welding, cutting, hot work shall be conducted in accordance with the provisions of NFPA 51B, Standard for Fire Prevention During Welding, Cutting, and Other Hot Work Portable electric tools and extension lights capable of igniting LP-Gas shall not be permitted within classified areas except where the area has been identified as free of flammable gases. 2. Revise to read: Vehicles and other mobile equipment that constitute potential ignition sources shall be prohibited within diked areas or within 50 ft (15 m) of containers that contain LP-Gas, flammable liquids, or flammable refrigerants, except where authorized and at loading or unloading at facilities specifically designed for the purpose. 3. Revise to read: 4.5.5* Where stray electrical currents are present or where impressed currents are used on loading and unloading systems such as for cathodic protection, protective measures shall be taken to prevent ignition. 4. Relocate A to A Committee Statement: The proposal is accepted with editorial revisions Log #32 Final Action: Accept (4.7.1) Recommendation: Delete the following text: Fixed electrical equipment and wiring installed within the classified areas specified in Table shall comply with Table and shall be installed in accordance with NFPA 70, National Electrical Code, for hazardous locations. Substantiation: Duplicates the text in amended Log #35 Final Action: Accept ( ) Containers shall be located in accordance with Table with respect to the distance between containers, the distance between containers and the nearest important building or group of buildings not associated with the LP- Gas Utility Gas plant, or a line of adjoining property that can be built upon. Substantiation: Utility Gas Plant is defined, LP Gas plant is not Log #CP2 Final Action: Accept ( ) Submitter: Technical Committee on LP-Gases at Utility Gas Plants, Recommendation: Revise to read: When the provisions of through [of NFPA 58] are met, the minimum distance from an ASME container to a building shall be reduced by one-half for ASME containers of 2001 gal through 30,000 gal (7.6 m 3 through 114 m 3 ) water capacity. [58:6.3.2] Substantiation: References in NFPA 59 are substituted for those in NFPA 58, Liquefied Petroleum Gas Code. The text is identical in both documents Log #36 Final Action: Accept ( ) Recommendation: Delete the following text: If insulation is used, it shall be capable of limiting the container temperature to not over 800 F (427 C) for a minimum of 50 minutes, as determined by test with insulation applied to a steel plate and subjected to a test flame substantially over the area of the test plate, and shall be resistant to weathering and the action of hose streams. (See Annex D.) Substantiation: The section is deleted here and moved to as it is more appropriate under Special Protection Log #38 Final Action: Accept in Principle ( ) Partially buried (or mounded) containers shall have not less than 12 in. (300 mm) of cover of earth, sand or other non-combustible material, and shall provide sufficient to provide surface drainage without erosion or other deterioration. Substantiation: Add wording to better define cover over the container. in Principle Revise text to read as follows: Partially buried (or mounded) containers shall have not less than 12 in. (300 mm) of cover of earth, sand or other noncombustible material, and shall provide sufficient to provide surface drainage without erosion or other deterioration. Committee Statement: The proposal is accepted with an editorial revisions Log #39 Final Action: Accept ( ) Containers shall be set level on a firm foundation and surrounded with earth or sand that is firmly tamped in place. Substantiation: Add level to assure bet placement of the container Log #37 Final Action: Accept ( ) Recommendation: Add the following text: Any damage to the coating shall be repaired before backfilling. Substantiation: Add this to ensure that containers are coated when buried Log #40 Final Action: Accept ( ) Where all the provisions of Section [of NFPA 58] are complied with, the minimum distances from important buildings and the line of adjoining property that can be built upon to underground and mounded ASME containers of 2001 gal through 30,000 gal (7.6 m³ through 114 m³) water capacity shall be reduced to 10 ft (3.0 m). [58: ] Substantiation: Reworded for clarity as NFPA 58:6.24 includes low emission transfer which is not a factor at Utility gas plants. This is because of stringent requirements existing at these facilities regarding transfer site location. This also provides consistency within NFPA Log #CP3 Final Action: Accept (5.9.3) Submitter: Technical Committee on LP-Gases at Utility Gas Plants, Recommendation: Revise to read: ASME Container Appurtenances. The provisions in through shall be required for ASME containers of 2001 gal through 30,000 gal (7.6 m3 through 114 m3) water capacity referenced in Section 6.24 [of NFPA 58] 5.9. [58:6.24.3] Substantiation: References in NFPA 59 are substituted for those in NFPA 58, Liquefied Petroleum Gas Code. The text is identical in both documents.

8 59-39 Log #42 Final Action: Accept (6.8) Recommendation: Delete the entire section. Substantiation: Delete the entire section of 6.8 as the sections 10.3, 10.6, , 10.4, covers everything that is in 6.8. Chapter 10 is the appropriate location for relief valve related standards. Also the extraction of NFPA 58 as it was setup in 6.8 does not benefit the 59 and puts the control of this standard in the 58 committee s hands Log #86 Final Action: Reject (6.8 and 10.3) Submitter: Steven D. Ruffcorn, Standby Systems, Inc. Recommendation: Delete and and move/renumber the remainder of Section 6.8 as 10.3 (with editorial renumbering of the balance of Chapter 10.) The effect of this proposal is to technically delete all of Section 6.8 and create new text at Section Only the following Section 6.8 provisions are actually deleted from NFPA 59: Safety relief valve discharge stacks or vents shall be designed and installed to prevent an accumulation of water, ice, snow, or other foreign matter and shall discharge vertically upward. [58: ] All refrigerated storage container pressure and vacuum relief devices shall be tested or replaced at intervals not to exceed 5 years. [58: ] Renumbered Section 6.8 text as Section The only change, other than the deletions noted above, is replacing 6.8 with 10.3 : 10.3 Relief Devices. [58:12.8] General. [58:12.8.1] All containers shall be equipped with pressure and vacuum relief devices in accordance with Section [58: ] Relief devices shall communicate directly with the atmosphere. Vacuum relieving devices shall be installed if the container can be exposed to a lower vacuum than the container is designed for. [58: ] Inlet and outlet piping connections to relief devices shall be included in the selection and sizing of relief devices. [58: ] A manually operated full opening stop valve shall be installed between each pressure and vacuum safety relief valve and the LP-Gas container. [58: ] All stop valves installed between a relief valve and a container shall be lockable or sealable in the fully open position. [58: ] A sufficient number of pressure and vacuum relief valves shall be installed on the LP-Gas container to allow each relief valve to be isolated individually while maintaining the full relieving capacities required. [58: ] Where only one relief device is required, either a full port opening three-way valve shall be installed between the container and two relief devices, or separate stop valves shall be beneath each relief device. [58: ] Stop valves under individual safety relief valves shall be locked or sealed when opened and shall not be opened or closed except by an authorized person. [58: ] No more than one stop valve shall be closed at one time. [58: ] Pressure Relief Device Sizing. The pressure relief devices shall be sized to relieve the flow capacity determined for the largest single contingency or any reasonable and probable combination of contingencies that follow: (1) Fire exposure (2) Operational upset, such as failure of a control device (3) Other circumstances resulting from equipment failures and operating errors (4) Vapor displacement during filling (5) Flash vaporization during filling, as a result of filling, or as a consequence of mixing of products of different compositions (6) Loss of refrigeration (7) Heat input from pump recirculation (8) Drop in barometric pressure [58:12.8.2] Vacuum Relief Device Sizing. [58:12.8.3] The vacuum relief devices shall be sized to relieve the flow capacity determined for the largest single contingency or any reasonable and probable combination of contingencies that follow: (1) Withdrawal of liquid or vapor at the maximum rate (2) Rise in barometric pressure (3) Reduction in vapor space pressure as a result of filling with subcooled liquid [58: ] Reduction in the vacuum relief capacity to allow for the rate of vaporization resulting from minimum normal heat gain to the contents of the container shall be allowed. [58: ] No vacuum relief capacity credit shall be allowed for gas-repressuring or vapor make-up systems. [58: ] Fire Exposure Sizing. [58:12.8.4] The pressure-relieving capacity required for fire exposure shall be computed by the following formula: where: W= relieving capacity in lb/hr or product vapor at relieving conditions. F= environmental factor from Table L= latent heat of vaporization of the stored liquid at the relieving pressure and temperature, in Btu/lb. A= exposed wetted surface area of the container in ft2. In the case of large containers, the exposed wetted area is the area up to a height of 30 ft above grade. Hn= normal heat leak in refrigerated tanks, in Btu/hr. [58: ] Table Environmental Factors Basis FFactor Base container 1.0 Water application facilities 1.0 Depressuring and emptying facilities 1.0 Underground container 0 Insulation or thermal protection Insulation or thermal protection (metric) Note: U is the overall heat transfer coefficient Btu/(hr ft 2 F) [W/(m 2 C)] of the insulation system using the mean value for the temperature range from T f to F (904 C). T f is the temperature of vessel content at relieving conditions, F ( C). [58: Table ] Where credit for insulation is taken in sizing of a relief valve for fire exposure, the insulation shall comply with the following: (1) Resist dislodgment by fire-fighting equipment (2) Be noncombustible (3) Not decompose at temperatures up to 1000 F [58: ] If the insulation does not meet the criteria of , no credit for the insulation shall be taken. [58: ] The equivalent airflow for relieving capacity shall be calculated by the following equation: where: SCFM (air) = equivalent airflow in standard ft3/min W= relieving capacity of product vapor at relieving conditions, lb/hr Z= compressibility factor product vapor at relieving conditions T= absolute temperature of product vapor at relieving conditions, R M= product vapor molecular weight [58: ] Substantiation: 6.8 is extracted from 58:12.8 and essentially duplicates the tobe-removed Section 10.3 through Moving Section 6.8 to Chapter 10 improves organization of relief devices. Requirements of and are covered in 10.6 (to be renumbered) and See comparison shown on the following pages for a side-by-side view of the relevant texts of Section 6.8 and Chapter 10. See also companion proposal to delete Section 10.3 through (Note: TIA #814 considered deletion through in 2005.) Committee Meeting Action: Reject Committee Statement: The proposed revisions are not needed as the intent is accomplished in Proposal (Log #42). 59-8