Quality: The fire hose to be supplied under this specification is a premium quality, double jacket municipal fire hose. All materials used in the fabrication of the hose shall be of the best quality commercially available. The manufacturer of the hose shall be ISO 9001-2008 quality certified.
Service Life: The fire hose furnished under the terms of this proposal has a potential service life of 10 years, barring mistreatment or accidental damage that would render the hose unfit for service. Upon delivery, the fire hose shall be in first-class condition free from defects in workmanship and materials. The supplier shall provide replacement of any such hose as may be defective without any charge whatsoever to the Fire Department. There shall be a materials and workmanship warranty of 10 years.
NFPA Standard: The hose must meet all the requirements of NFPA 1961, Standard on Fire Hose (Current Edition).
Jackets: The jackets shall be evenly and firmly woven, free from unsightly defects, dirt, knots, lumps, and irregularities of twist that might affect the serviceability of the finished product. The inner jacket shall be woven with a reverse twill weave to provide a smoother waterway.
Each jacket shall be seamless and shall have filler yarns woven around the hose throughout its length, with the warp ends interwoven with warp yarn and covering the filler yarns.
Warp ends of both the inner and outer jackets shall have 6.6 nylon entangled filament yarn, structured to allow total saturation of an abrasion treatment. The use of polyester or staple yarns in the warp is not allowed.
Filler yarns of both the inner and outer jackets shall be high-tenacity filament polyester developed, designed, and processed for fire hose jacket filler yarns. These filament polyester yarns shall be free from defects that are unsightly or may affect the serviceability of the finished hose. The entangled nylon warp ends must completely cover and protect the filament polyester filler yarns. The inner jacket shall be of reverse twill weave.
Wear-Guard Impregnation: Each outside jacket shall be completely impregnated by a mechanical process to provide coverage of an abrasion heat resistant, water-repellent elastomer compound prior to the jackets and liner being combined. Coating applied to finished hose, allowing varied absorption to the inside jacket, is not acceptable. Colors available Yellow, Red, Orange, Blue, Forest Green, Tan.
Lining: The thermoplastic lining shall be a single ply extrusion of thermo-polyurethane (TPU) polymer, which naturally resists hydrolysis, ozone, and oxidation. Natural or synthetic rubber is Not Acceptable. No reclaimed material or thermoplastic through the weave extrusion lining shall be used. The lining shall meet the requirements of the National Sanitation Foundation Standard 61 for potable water use. The lining thickness shall be tightly controlled to reduce weight, increase compactness and kink radius.
Thickness: 1½”, 1¾”: 0.026” maximum
2½” & 3”: 0.036 maximum
Tensile Strength: 2000 psi minimum.
Elongation: 400% minimum (1” to 5”)
Ozone Resistance: Lining specimens shall be subjected to ASTM D 1149-91, “Standard Test Method for Rubber Deterioration — Surface Ozone Cracking in a Chamber”. There shall be no appearance of cracking or crazing when viewed under a 7-power magnifying glass at any time during or at the end of the 100 hour exposure.
Accelerated Aging: Lining specimens shall be subjected to ASTM D573-88, “Standard Test Method for Rubber — Deterioration in an Air Oven”. .
Adhesion: The adhesive must be of uniform thickness around the circumference of the lining. The adhesion shall be such that the rate of separation on 1½” strip of lining, transversely cut, shall not be greater than 1” per minute under a weight of 12 lbs.—No Exceptions
Low Temperature Flexibility: The hose shall be capable of performing in extreme cold temperature conditions. A 3-foot section of hose shall be exposed to a temperature of -54° +/- 2° C (-65° +/-3° F) for a period of 24 hours. At the end of the exposure period, and while maintained at the -55°C exposure temperature, the hose shall be rapidly bent 180° double on itself, first one way and then the other. There shall be no cracking or breaking of the jacket or liner. Leakage shall be cause for rejection.
- Hydrostatic tests shall be conducted on hose equipped with the couplings to be delivered in accordance with NFPA 1961.
- Each length of hose is to be subjected to a hydrostatic proof test pressure of 800 psi for at least 15 seconds and not more than 1 minute. Higher test pressures, which may weaken the hose, are expressly forbidden.
- Twist: The hose shall not twist more than 4-1/4 turns per 50 ft for the 1½”, 1¾”, and 2” sizes, and not more than 1¾ turns per 50 ft for the 2½” and 3” sizes under a pressure of 800 psi. No final twist in a direction to loosen the couplings shall be permitted.
- Warp: The hose shall not warp more than 20” from a straight line drawn from center to center of the fittings at the ends of the hose, and the hose shall not rise from the table.
- Expansion: The expansion in circumference of the hose between 10 and 800 psi shall not exceed 8%.
- Elongation: The elongation between 10 and 800 psi shall not exceed 8% for the 1½, 1¾”, 2” sizes, and shall not exceed 10% for the 3” size.
Burst Test: A 3-foot sample of hose chosen at random shall stand without failure a hydrostatic pressure of 1200 psi while lying straight or curved on a 27” radius. Retention of the coupling to the hose shall equal or exceed the burst pressure.
Kink Test: A full length shall withstand, while kinked, without failure, a hydrostatic pressure of 600 psi.
Diameter: The hose shall have an internal diameter of not less than the trade size of the hose, except that internal diameter of the 2½” hose shall not be less than 2-9/16”.
Method of Testing: All measurements and tests necessary to determine compliance of the fire hose with the specified requirements shall be made in accordance with ASTM D 380-87, “Standard Test Methods for Rubber Hose”, except as otherwise specified. All tests shall be conducted at the point of manufacture, or at a laboratory equipped for such testing. All tests shall be performed as specified in NFPA 1961 (2002 Edition). Hydrostatic tests shall be conducted under controlled conditions employing equipment capable of supplying a uniform pressure.
Warranty: The manufacturer warrants the hose to be free from defects in materials and workmanship for a period of TEN years. The warranty shall provide for the repair or replacement of the hose and couplings proven to have failed due to faulty material or workmanship.
|Weight per 50’
Per 50’ Uncoupled