Hose Practices (7th Edition)-Chapter 1 Numbers
Hose Practices (7th Edition)
Chapter 1 - Hose & Coupling Construction
"By the Numbers"
▪ Hose development timeline:
|Year |Development |
|late 1800's |The fire service recognized the problems with fire agencies using different couplings. |
|1873 |Standards for fire hose screw threads was passed in a resolution from the International Association of Fire |
| |Engineers (now the International Association of Fire Chiefs). |
|1898 |The NFPA began drawing up thread specifications for hose couplings. |
|1905 |The NFPA was appointed to standardize couplings, hose, nozzles, and accessories. |
|1925 |dimensions for 2 1/2", 3", 3 1/2", and 4 1/2", couplings were agreed upon as an American National Standard. |
|1935 |3/4", 1", and 1 1/2" thread dimensions were standardized. |
|1955 |4", 5", and 6" thread dimensions were standardized. |
|1956 |Standard dimensions for gasket grooves and gaskets for all 10 sizes were adopted. |
▪ Standards and Requirements for Hose:
|ASTM E380-78 |Standard for Metric Practice |
|ASTM D296 |Woven-Jacket Rubber-Lined Fire Hose for Public and Private Department Use |
|ASTM D380 |Standard Method of Testing Fire Hose |
|ANSI A152.1 |Safety Standard for Unlined Fire Hose |
|ANSI Z210.1 |Metric Practice Guide |
|ANSI/UL 92 |Fire Extinguisher and Booster Hose |
|FM 2111 |Approval Standard for 1 1/2" and 2 1/2" Lined Fire Hose |
|NFPA 14 |Standard for Standpipe and Hose System |
|NFPA 24 |Standard for Outside Protection |
|NFPA 1961 |Standard for Fire Hose |
|NFPA 1962 |Standard for Care, Use, and Maintenance of Fire Hose, Including Connections and |
| |Nozzles |
|NFPA 1963 |Standard for Screw Threads and Gaskets for Fire Hose Connections |
|RMA, IP-12 |Standard for High Pressure Fire Engine Booster and Fire Extinguisher Hose |
|UL Standard 19 |Woven-Jacketed Rubber-Lined Fire Hose |
|USDA/USFS 5100-186a |Hose, Cotton-Synthetic Jacketed, Lined 1" and 1 1/2" Hose |
|USDA/USFS 5700-183f |Specification for 1" and 1 1/2" Linen Hose |
▪ Threads Per Inch (per NFPA 1963):
|Diameter |Number of Threads |
|3/4" |8 |
|1" |8 |
|1 1/2" |9 |
|2 1/2" |7 1/2 |
|3" |6 |
|3 1/2" |6 |
|4" |4 |
|4 1/2" |4 |
|5" |4 |
|6" |4 |
▪ The most common size of standpipe hose is 1 1/2".
▪ Booster Hose is manufactured in 3/4" and 1" sizes.
▪ 2 1/2" and 3" hose is considered Medium Diameter Hose (MDH).
▪ 3 1/2", 4", 4 1/2", 5", and 6" hose is considered Large Diameter Hose (LDH).
▪ Soft-Sleeve and Hard Suction hose is available in sizes from 2 1/2" to 6".
▪ Conventional extinguisher hose is used on extinguishers that discharge at 400 psi or less, while high-pressure extinguisher hose withstands pressures up to 1,250 psi.
▪ Thermoplastic hose linings have 5 to 6 times more tensile strength and often weigh 40% less than rubber linings.
▪ Brass is usually composed of not less than 83% copper and 5% tin; and not more than 7% zinc and 3% lead.
▪ Coupling sizes available for fire hose:
|Hose Size |Coupling Sizes Available |
|1" |1 1/2" |2 1/2" |3" |3 1/2" |4" |4 1/2" |5" |6" | |3/4" |X | | | | | | | | | |1" |X | | | | | | | | | |1 1/2" | |X | | | | | | | | |1 3/4" | |X | | | | | | | | |2" | |X | | | | | | | | |2 1/2" | | |X | | | | | | | |3" | | |X |X | | | | | | |3 1/2" | | |X |X |X | | | | | |4" | | | | | |X |X |X |X | |4 1/2" | | | | | |X |X |X |X | |5" | | | | | |X |X |X |X | |6" | | | | | |X |X |X |X | |Sexless couplings rotate 90 degrees clockwise to lock.
▪ Storz couplings rotate 1/3 turn to lock or break.
▪ There are 5 different components/methods for attaching couplings to fire hose.
▪ The collar method attachment on 4 inch hose will reduce the waterway through the coupling by 1/2 inch.
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