1、 Tentative Interim Amendment NFPA58 Liquefied Petroleum Gas Code 2014 Edition Reference: 5.7.4, 11.4.1.11, 11.4.1.15, and 11.13.2.8 TIA 14-3 (SC 13-10-3/TIA Log #1116) Pursuant to Section 5 of the NFPA Regulations Governing the Development of NFPA Standards, the National Fire Protection Association
2、has issued the following Tentative Interim Amendment to NFPA 58, Liquefied Petroleum Gas Code, 2014 edition. The TIA was processed by the Technical Committee on Liquefied Petroleum Gases, and was issued by the Standards Council on October 22, 2013, with an effective date of November 11, 2013. A Tent
3、ative Interim Amendment is tentative because it has not been processed through the entire standards-making procedures. It is interim because it is effective only between editions of the standard. A TIA automatically becomes a public input of the proponent for the next edition of the standard; as suc
4、h, it then is subject to all of the procedures of the standards-making process. 1. Revise 5.7.4 to read as follows: 5.7.4 Container Valves and Other Appurtenances. 5.7.4.1 Containers of 4000 gal (15.2 m3) water capacity or less shall comply with 5.7.4.1(A) through 5.7.4.1(B). (A) The following conta
5、iners shall be permitted to be equipped with external pressure relief valves: (1) Underground ASME containers (2) ASME containers originally equipped with external pressure relief valves (3) ASME containers with 125 gal (0.5 m3) water capacity or less, having a pressure relief valves integrated as p
6、art of a multiple function valve (B) Containers in other than bulk plant or industrial plant service shall be fitted with valves and other appurtenances in accordance with 5.7.8.1, Table 5.7.4.1(B), and the following: (1) and (2) unchanged. (3) Containers greater than 125 gal through 4000 gal (0.5 m
7、3through 15.2 m3) water capacity shall be provided with an actuated liquid withdrawal excess-flow valve with a connection not smaller than 34 in. NPT (19 mm) and the container connection shall not be smaller than 34 in. NPT (19 mm). (4) through (7) unchanged (8) Manual shutoff valves in vapor servic
8、e shall be equipped with one of the following: (a) An orifice between the container contents and the shutoff valve outlet, not exceeding 516 in. (8 mm) in diameter, and an approved regulator directly attached, or attached with a flexible connector, to the manual shutoff valve outlet (b) An excess-fl
9、ow valve (9) through (10) unchanged (11) Full internal pressure relief valves or flush-type full internal pressure relief valves shall be installed in multiple function valves that are used with single opening cylinders used in industrial truck service and shall have the springs and guiding mechanis
10、m on the container pressure side of the seats, so that the springs and guiding mechanism shall not be exposed to the atmosphere. (12) Multiple function valves installed on single opening cylinders used in industrial truck service shall meet the following requirements: (a) Cylinders complying with 5.
11、7.2.14 shall have the full internal or flush-type full internal pressure relief valve exchanged with a replacement multiple function valve that incorporates the full internal or flush-type full internal pressure relief valve as described in 5.7.4.1(B)(11) and 5.7.4.1(B)(12). (b) The multiple functio
12、n valve with the full internal or flush-type full internal pressure relief valve shall be permitted to have the means to be replaced without removing the multiple function valve from the cylinder. (c) The multiple function valve shall incorporate an excess-flow valve installed inside the container f
13、or the liquid or vapor withdrawal service valve outlet. (d) The multiple function valve shall incorporate a weak section on the service valve outlet connection. (e) The multiple function valve shall incorporate an excess-flow valve installed inside the container that shall not restrict the flow to t
14、he full internal or flush-type full internal pressure relief valve. (f) The multiple function valve shall be listed. Change the caption of Table 5.7.4.1(D) to read as follows: Table 5.7.4.1(B) Container Connection and Appurtenance Requirements for Containers Used in Other Than Bulk Plants and Indust
15、rial Plants 5.7.4.2 unchanged 5.7.4.3 ASME containers over 4000 gal (15.1m3) water capacity shall also be equipped with the following appurtenances and shall comply with Table 5.7.4.2: Remainder unchanged. 5.7.4.4 The appurtenances specified in Table 5.7.4.1(B) shall comply with the following: (1) M
16、anual shutoff valves shall be designed to provide positive closure under service conditions. (2) Excess-flow valves shall be designed to close automatically at the rated flows of vapor or liquid specified by the manufacturer. Remainder unchanged. Delete the entire column headed by “2001 gal through
17、4000 gal W.C.* in Table 5.7.4.2. 2. Revise 11.4.1.10, 11.4.1.11, 11.4.1.15, and 11.13.2.8 to read as follows: 11.4.1.10 Cylinders used in engine fuel service, for industrial trucks, shall be equipped with full internal or flush-type full internal pressure relief valves. 11.4.1.11 Single opening cyli
18、nders in industrial truck service shall be equipped with a listed multiple-function valve in accordance with 5.7.4.1(B)(11) or 5.7.4.1(B)(12). 11.4.1.15 Where an overfilling prevention device is installed on the ASME container or exterior of the compartment and remote filling is used, a filler valve
19、 complying with 5.7.4.1(B)(7)(a) or (b) shall be installed in the exterior fill opening, and a filler valve complying with 5.7.4.1(B)(7)(c) shall be installed in the container filler valve opening. 11.13.2.8 Industrial truck cylinders shall have pressure relief valves that conform with 5.7.4.1(B)(11) or 5.7.4.1(B)(12). Issue Date: October 22, 2013 Effective Date: November 11, 2013 (Note: For further information on NFPA Codes and Standards, please see www.nfpa.org/codelist) Copyright 2013 All Rights Reserved NATIONAL FIRE PROTECTION ASSOCIATION
