| At a glance: |
Highly abrasion resistant hoses used in sand and gravel pits, dredging, mining, coal, grain handling and many more industries where abrasive products are transported.
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| Example: |
 
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Left: 12" diameter abrasion resistant lined hose with integral flanges. Right: 8" diameter hose carrying dredged aggregates into a processing plant.
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| Specification: |
A402 and A412: Sand, gravel and mining hose.
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| Size: |
2" (51mm) id to 36" (915mm) id
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| Example: |
 
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Left: 8" diameter hoses on a sand washing plant. Right: 12" diameter preformed rubber elbow with integral flanges.
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| Length: |
Up to and including: 12" (305mm) up to 19.5 mtr 14" (356mm) and above - 12 mtr.
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| Lining: |
Two types of lining are available in thicknesses from 3mm to 12mm depending on the nature and severity of the application. A tan coloured gumstock 40° hard  Natural rubber for fine air-borne abrasives (A402) and a black reinforced 60° hard Natural rubber for slurries and heavy abrasives such as gravel and rock (A412). See Variations for details.
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| Reinforcement: |
Multiple layers of synthetic cord and a single steel helix, giving minimum 3.5:1 safety factor and a minimum bend radius of up to 6x boresize.
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| Pressure: |
Rated up to 10 bars working pressure. Higher working pressures are available on request. Hose assemblies are tested upon request.
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| Cover: |
Corrugated for greater flexibility. Tough weather and abrasion resistant. Two types are available, black Natural rubber for normal use or black Neoprene rubber for more extreme external conditions. See Variations for details. Smooth outer covers are available to accommodate external aluminium flanges.
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| Example: |
 
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Left: Gravel hoses with two piece split flanges. Right: D section ring and two-piece split flanges.
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| Couplings: |
The following types are usually supplied where the abrasive material would excessively wear a steel hose tail:  Integral flanges with steel backing plates. D section ring with two-piece split flanges and Beaded end with one-piece captive flanges. However, a heavy duty thick walled carbon steel hose tail, wired, strapped or Built-in can be an option. Refer to Coupling Systems for further information.
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| Physical data: |
Weights and dimensions are based on standard lining thickness shown.
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| Physical data: A402 and A412 |
| Bore size |
Lining |
Nom od |
Nom wgt |
Min bend |
| Inches |
mm |
mm |
mm |
kg/mtr |
radius mm |
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| 2 |
51 |
3 |
68 |
2.2 |
203 |
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| 3 |
76 |
6 |
102 |
5.0 |
305 |
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| 4 |
102 |
6 |
128 |
604 |
406 |
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| 5 |
127 |
7.5 |
156 |
8.9 |
508 |
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| 6 |
152 |
9 |
188 |
12.9 |
610 |
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| 7 |
178 |
9 |
213 |
14.9 |
820 |
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| 8 |
203 |
9 |
204 |
17.8 |
1190 |
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| 9 |
228 |
9 |
269 |
21.7 |
1350 |
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| 10 |
254 |
9 |
294 |
23.9 |
1520 |
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| 12 |
305 |
9 |
346 |
29.1 |
1800 |
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| 14 |
356 |
9 |
401 |
37.1 |
2490 |
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| 16 |
400 |
9 |
454 |
42.1 |
2900 |
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| Many other sizes are available up to 36" (915mm) id. |
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| Example: |
 
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Left: Beaded end captive one-piece swivel flanges are capable of working at pressures up to 10 bars and are used here on a heavy duty gravel hose. Right: 102mm internal diameter mining hoses conveying highly abrasive powder. The hose cover is corrugated following the embedded wire spiral for optimum flexibility.
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| Variations: |
Lining thickness' can vary depending on the nature of the application. Thicknesses are available in increments of 1.5mm commencing at 3mm. e.g. A402-3 = 40 deg hard gum stock, 3mm thick lining. A412-10.5 = 60 deg hard black, 10.5mm thick lining. If a neoprene cover is required for more extreme exposure conditions the letters 'CR' are added. e.g. A412-6-CR = 60 deg hard black, 6mm thick lining.
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