Detailed Specifications

APPLICABLE SPECIFICATIONS

Unless otherwise specifically designated in this specification, all measurements and test necessary to determine compliance of the hose with the specified requirements shall be made in accordance with Standard Specifications for Testing Rubber Hose, ASTM, D-380-81.

TYPE AND SIZES

1)  The type of hose shall be two braid.

2)  Hose size shall be 1 inch nominal internal diameter.

MATERIAL AND WORKMANSHIP

All materials used in the fabrication of the hose shall be of the best quality normally used for the purpose in good commercial practice for the type designated. The workmanship shall be of the highest quality.

TUBE CONSTRUCTION DETAIL

1)  The line tube shall be of rubber. The word rubber as used in this specification shall be understood, to mean natural plantation rubber, synthetic rubber, or a combination of the two, compounded and processed to give long, serviceable life under good maintenance practice.

2)  The tube shall be extruded of uniform thickness throughout its length, the waterway of the tube shall be smooth and free from imperfections.

3)  The thickness of the tube shall not be less than .050 inches.

4)  The rubber layer between braids shall not exceed .028" in thickness.

5)  The adhesion between the layer and braids between tube and braid, or between the cover and braid shall be such that a weight of 10 pounds suspended from a ring specimen 1" wide will cause separation at a rate not greater than 1 inch per minute.

6)  When tested within 60 days from date shipment.is received, a section of the liner tube shall comply with the following requirements. The test specimen shall be cut along the hose axis.

Tensile strength, minimum	800 psi
Elongation (minimum)	150%
Tensile and Elongation Deterioration (maximum loss)*	25%
Shore Hardness	80 ± 5
*(Aged Oxygen Pressure Method 300 ± 10 PSI Oxygen at 158° 1.8° F for 96 hours)

BRAID CONSTRUCTION

1)  Both braids shall be of heat set and treated continuous filament polyester yarn, free from defects.

2)  The braids shall be evenly and firmly braided, free from defects in material and workmanship that are unsightly or may affect the serviceability of the finished hose.

FINISHED HOSE

1)  The internal diameter of the hose shall be 1 inch ± 1/16".

2)  Each piece of hose of nominal 50-foot length shall be supplied in such additional length as will permit the attachment of coupling fittings and still provide a minimum of 50 feet of hose, from back of couplings, when measured under 10 PSI water pressure.

3)  The weight of 50 feet of the hose, untreated, without couplings, shall not exceed 40 pounds.

4)  An 18 inch length, while lying flat and straight shall not burst under 3200 PSI.

5)  Each length of hose shall withstand hydraulic test pressure of not less than 1600 PSI for one minute.

6)  The elongation between 10 and 800 PSI shall not exceed 4%.

7)  The expansion in circumference of the hose between 10 and 800 PSI shall not exceed 4%.

8)  Twist of the hose in direction to tighten couplings, between 10 and 800 PSI shall not exceed 2 ½ turns per 50-foot length. No final twist in a direction to loosen the coupling shall be permitted.

9)  Warp from a straight line between 10 and 800 PSI shall not exceed 20 inches and the hose shall not rise from the test table.

10)  There shall be no contraction in circumference of the hose between 10 and 800 PSI.

COUPLINGS

1)  Two piece reattachable or permanent swage couplings can be used.

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