Attach 2 Hose Characteristics.docx

To be considered or equal, hoses must meet the following physical, salient characteristics:

· Must include dry-break fittings installed in hose

· Color: Black

· Through-the-weave construction with added protection from a circular woven textile outer sheath

· At least a 3 to 1 safety ratio of working pressure to burst to ensure safety and reliability when using the products in repetitive maintenance or emergency operations

· Service life of 10-15 years, barring mistreatment or accidental damage that would render the hose unfit for service

· Manufactured using a through-the-weave extrusion process

· Woven textile jacket will be completely encapsulated with a thermoplastic polyurethane cover and liner

· Static dissipation wires shall be incorporated into the hose wall

· Anti-static wires shall be continuous and provide maximum electrical resistance of 1.5 ohms per foot of finished hose

· Thermoplastic polyurethane material used in construction shall be a single ply extrusion of polyether urethane polymer which naturally resists hydrolysis, ozone, and oxidation

· Natural or synthetic rubber is not acceptable

Hose(s) provided must have been subjected to/passed the following tests:

Ozone Resistance: Cover specimens shall be subjected to ASTM D 1149-91, “Standard Test Method for Rubber Deterioration — Surface Ozone Cracking in a Chamber”. Specimens shall be prepared in accordance with ASTM D 518-86, “Standard Test Method for Rubber Deterioration — Surface Cracking”, Procedure C, and shall be elongated 15%. After conditioning for 24 hours in an ozone-free atmosphere, the mounted specimens shall be exposed for 336 hours at 104 +/- F, to an atmosphere containing 50 pphm +/- , per hundred million(pphm) of ozone. 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 336 hour exposure

Tensile Strength and Ultimate Elongation after Water Immersion:

Tensile strength and ultimate elongation after water immersion shall be determined in accordance with ASTM D 471. The immersion test shall be performed in accordance with ASTM D 471, utilizing water as a test fluid. One specimen shall be subjected to water immersion test for 14 days at 23 degrees C.

When tested as specified, the tensile strength of the tube and cover after 14-day water immersion shall be at least 40 percent of the tensile strength obtained before immersion and shall be at least 500 psi. The tensile strength after 42-day water immersion shall be at least 25 percent of the tensile strength before immersion and shall be at least 200 psi.

When tested as specified, the ultimate elongation after 14-day water immersion shall be not less than 40 percent of the original elongation obtained before immersion. The ultimate elongation, after 42 days, shall be not less than 25 percent of the original elongation obtained before immersion.

Adhesion: The test for adhesion shall use a dry and wet specimen in accordance with ASTM D 413. When tested in this manner, the original adhesion between the tube and reinforcement, and between the cover and the reinforcement, and between the cover and end reinforcement, shall be not less than 5.34 decanewton (daN) for the cover and 5.34 (daN) for the lining.

Low Temperature Flexibility: The hose shall be capable of performing in extreme cold temperature conditions. The test for low temperature flexibility shall be made in accordance with ASTM D 1053. The low temperature test shall be determined after the samples have been conditioned 7 days at -25.6 degrees F. Leakage shall be cause for rejection.

Abrasion: Hose should be tested in accordance with ASTM D3389, method A, using abrasion wheel H-22 having neither additional weight nor counterweight applied to the specimen holder. Specimen should withstand at least 250,000 cycles without any exposure of the internal reinforcing jacket or lining.

Hydrostatic Test:

(A) The hose shall be coupled and tested at the point of manufacture if specified by customer. Hydrostatic tests shall be conducted on hose equipped with the couplings to be delivered in accordance with NFPA 1961 or suitable pressure testing regime specified by customer.

(B) Each length of hose is to be subjected to a hydrostatic proof test pressure as per above conventions or agreements.

(C) The hose shall not twist more than 36° per 100 feet of length under maximum working pressure.

(D) 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.

(E) The expansion in circumference of the hose between 10 and 200 psi shall not exceed 10%.

(F) The elongation between 10 and 200 psi shall not exceed 3%.

Burst Test: All hoses shall be woven with “Anti-Burst” technology. No radial burst will be allowed. Retention of the coupling to the hose shall equal or exceed the burst pressure.

Diameter: The hose shall have an internal diameter of not less than the trade size of the hose

Weight (pounds/ft)

depending on application