1、 Tentative Interim Amendment NFPA1971 Standard on Protective Ensembles for Structural Fire Fighting and Proximity Fire Fighting 2018 Edition Reference: Various Sections TIA 18-1 (SC 17-8-32 / TIA Log #1277) Note: Text of the TIA was issued and approved for incorporation into the document prior to pr
2、inting. 1. Revise 7.13.6 to read as follows: 7.13.6 Hoods with elastic or manually adjustable face openings shall be individually tested for resistance to shrinkage as specified in Section 8.24, Cleaning Shrinkage Resistance Test, and shall slide freely over the top half of the hood measuring device
3、 while in the relaxed state, shall not show any gaps when placed on the lower half of the hood measuring device, and shall not have the measurements made from the top of the hood to the marks at the back and both sides of the hood exhibit shrinkage of more than 5 percent. 2. Add new 7.13.6.1 to read
4、 as follows: 7.13.6.1 Hoods designed to interface with a specific SCBA facepiece shall be individually tested for resistance to shrinkage as specified in Section 8.24, Cleaning Shrinkage Resistance Test, and the overlap of the outer edge of the hood and the specific SCBA facepiece shall not shrink m
5、ore than 5 percent. The measurements from the top of the hood to the marks at the back and both sides of the hood shall not exhibit shrinkage of more than 5 percent. 3. Revise 8.6.16.4 to read as follows: 8.6.16.4 Specimen face openings with elastic or manually adjustable face openings shall be plac
6、ed over a hood measuring device as shown in Figure 8.6.16.4. Specimen face openings in the relaxed state shall slide freely over the top half of the device where the circumference measures 45.6 cm 0.6 cm (18.0 in. 0.25 in.). Specimen face openings shall then be placed around the lower half of the de
7、vice where the circumference measures 54.5 cm 0.6 cm (21.5 in. 0.25 in.). Specimens shall then be visually inspected for gaps between the hood and the measuring device surface. 4. Add new 8.6.16.4.1 to read as follows: 8.6.16.4.1 Specimen hoods with SCBA facepiece openings shall be measured as speci
8、fied in 8.47.5.1 through 8.47.5.3. 5. Revise 8.6.16.11 to read as follows: 8.6.16.11 Observations of the following for specimens with elastic or manually adjustable face openings shall be recorded and reported: (1) The ability of the face opening to slide freely over the top half of the hood measuri
9、ng device (2) Gaps between the hood face opening and the bottom half of the hood measuring device before and after heat exposure 6. Add new 8.6.16.11.1 to read as follows: 8.6.16.11.1 Specimen hoods with SCBA facepiece openings shall be measured as specified in 8.47.5.1 through 8.47.5.3. 7. Revise 8
10、.6.16.12 to read as follows: 8.6.16.12 The percent shrinkage of each of the three dimensions from the top of the hood to the marks along the basic plane shall be individually calculated, recorded, and reported. The percent shrinkage of the face opening overlap on specimens with specific SCBA facepie
11、ce openings shall be individually calculated, recorded, and reported. 8. Revise 8.6.16.13 to read as follows: 8.6.16.13 The average percent shrinkage of the three dimensions from the top of the hood to the marks along the basic plane for all specimens shall be calculated, recorded, and reported. The
12、 average percent shrinkage of the face opening overlap for each specimen with specific SCBA facepiece openings shall be individually calculated, recorded, and reported. 9. Revise 8.6.16.14 to read as follows: 8.6.16.14 Pass or fail performance for specimens with elastic or manually adjustable face o
13、penings shall be based on the face opening being able to slide freely in the relaxed state over the top half of the hood measuring device and any observations of gaps between the hood face opening and the hood measuring device. Pass or fail performance for specimens designed to interface with a spec
14、ific SCBA facepiece shall be based on the average percent shrinkage of the face opening overlap for each specimen. Pass or fail performance shall also be based on the average percent shrinkage of the three dimensions from the top of the hood to the marks along the basic plane for each specimen. One
15、or more hood specimens failing this test shall constitute failing performance. 10. Add new 8.6.16.15 to read as follows: 8.6.16.15 Pass or fail performance shall also be based on the average percent shrinkage of the three dimensions from the top of the hood to the marks along the basic plane for eac
16、h specimen. One or more hood specimens failing this test shall constitute failing performance. Issue Date: August 17, 2017 Effective Date: September 6, 2017 (Note: For further information on NFPA Codes and Standards, please see www.nfpa.org/docinfo) Copyright 2017 All Rights Reserved NATIONAL FIRE PROTECTION ASSOCIATION
