JAFRIB Hose Specification

Purchase Specifications for 5-inch Rubber Supply Hose

General: Fire Hose is to be 5-inches in diameter and 100-feet in length (or other shorter lengths as specified). Hose is to be constructed from superior nitrile rubber extruded-thru-the-weave of a woven single jacket construction. Hose to be designed for use in firefighting supply operations where resistance to petroleum, chemicals, and abrasion is critical. Hose must meet all requirements of NFPA 1961 Fire Hose Standard, 2013 edition, and must exceed those requirements when specified otherwise in this document.

Jacket Construction: Hose shall be made from 100% high tenacity synthetic polyester yarn in both the warp and weft directions, circular woven and completely protected and locked-in by tough, highly ozone resistant synthetic nitrile rubber using a single through-the-weave extrusion process. No glue or adhesive of any type is to be used.

Ultimate Elongation and Tensile Strength: The tensile strength of the nitrile rubber shall not be less than 1750 psi, with an ultimate elongation of not less than 500%. (Note that this required performance exceeds the NFPA required minimums, which for reference are 1200 psi and 400 percent).

Concentricity: The reinforcement material (the single jacket) around which the nitrile rubber is extruded must be nominally centered concentrically within the hose such that an visual examination of a cross section of the hose would show essentially equal amounts of rubber material on both the outside and the inside of the jacket.

Elongation: The maximum elongation of the hose assembly shall not exceed 5.0 percent when tested at the proof test pressure. (Note that this performance exceeds the NFPA required minimum, which for reference is 10.0 percent. Less elongation means less snaking, which minimizes abrasion).

Twist: The maximum twist in turns per 50 feet shall not exceed 1/2 turn when tested at the proof test pressure. (Note that this performance exceeds the NFPA required minimum, which for reference is 1-3/4 turns. Less twist provides easier handling of hose when charged).

Adhesion: The adhesion between the liner and the inside jacket is such that the rate of separation of a 1.5-inch wide strip cut transversely, shall not be greater than 1-inch per minute over a period of ten minutes, under a weight of 12 pounds.

Accelerated Aging: Lining specimens subjected to an exposure of 158ºF ± 3.6ºF, for a duration of 96 hours shall be conditioned as per ASTM D 573, Standard Test Method for Rubber – Deterioration in an Air Oven. Then, the specimens shall be tested to ASTM D4112, Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers-Tension, Method A. Under evaluation, the tensile and elongation properties of the liner shall not be less than 75% of their initial values.

Couplings: Five-inch aluminum locking Storz couplings are required. Couplings must meet NFPA 1963, Standard for Fire Hose Connections, 2009 edition.

Hydrostatic Tests: Hose assemblies with couplings attached must meet the following hydrostatic test criteria in pounds per square inch (psi). (Note that this required performance criteria exceeds the NFPA required test results, which are shown for reference).

For the hose diameter of 5 inches, the Service Test Pressure shall be 225 psi. Proof Test Pressure shall be 450 psi. And the Burst Test Pressure shall be 675 psi. (For reference the NFPA minimum requirements are 200 / 400 / 600 psi respectively).

Hose must be purposefully designed and manufactured to always, and only, burst in the Weft direction (along the length of the hose) when tested for Burst Pressure, or if it fails in service under pressure. Hose must never fail when under pressure along the Warp direction (across the diameter) as that is a very dangerous failure.

The minimum acceptable Kink Burst Pressure is 500 psi. (Note that this required performance criteria exceeds the NFPA required minimum, which for reference is set at 300 psi).

All tests must be performed in compliance with NFPA 1961 Fire Hose Standard, 2013 edition and ASTM D-30, Standard Test Methods for Rubber Hose.

Abrasion Resistance: Outer jacket must withstand a minimum of 30,000 cycles on the Taber Abrader with no abrasion through the filler yarn. H-22 Calibrated wheel to be used with 1,000 gram load on each wheel. The hose shall also withstand Underwriters Laboratory Abrasion Test in UL 19, Lined Fire Hose and Hose Assemblies and the Abrasion Test defined in FM Class Number 2111, Factory Mutual Approval Standard for Fire Hose.

Cold Resistance: Hose shall be serviceable down to -35º F. There shall be no apparent damage to jacket or lining when subjected to the following cold bend test: A 3-foot section of hose shall be exposed to a temperature of -35º F for a period of 24 hours. At the end of the exposure period, the hose shall be rapidly bent 180 degrees back onto itself, first one way and then the other. Following this procedure, the hose shall not leak, nor show any damage to the jacket when subjected to the burst pressure shown above.

Heat Resistance: Hose shall withstand 1200º F for at least two minutes without bursting when subject to a static pressure of 100 psi. Test procedures to be used are as defined in UL 19, Lined Fire Hose and Hose Assemblies, Heat-Resistance Test and FM Class Number 2111, Factory Mutual Approval Standard for Fire Hose, Heat Resistance.

Chemical Resistance: Exposure to seawater and contamination by most chemical substances, hydrocarbons, oils, alkalis, acids and grease will have no effect on the short or long term performance of the hose. Chemical resistance chart must be available upon request.

Ozone Resistance: Hose liner shall show no signs of cracking when examined under 7 power magnification when tested in accordance with ASTM D1149-91, Standard Test Methods for Rubber Deterioration-Cracking in an Ozone Controlled Environment (samples prepared in accordance with ASTM D518-86, Standard Test Method for Rubber Deterioration-Surface Cracking, procedure C). Specimen shall be elongated at 15% for 120 hours of exposure at 100 pphm ozone at a temperature of 122º F.

Weights and Coil Sizes: An uncoupled 5-inch X 100-foot length of hose shall, on average, weigh 99 pounds, and shall roll into a coil with a diameter, on average, of 27-inches

Colors: Hose must be red, or hi-vis yellow in color. Other colors available for minimum footage orders.

Quality Control: Hose must be woven and extruded together in manufacturer’s factory under a Quality Management System, which has been certified to ISO 9001.

Warranty: Both hose and couplings must be covered by a non-prorated warranty to be free from defects in material and workmanship for a period of 10 years. Defective hose will be repaired or replaced at no charge to the fire department.

Armored Textiles Fire Hose (ATI), 9 Vose Farm Rd, Peterborough NH 03458 PH: 603-924-2122 TOLL-FREE: 888-229-9655 FAX: 603-924-2322 www.armtexinc.com