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A-A-52426 Hose And Hose Assemblies, Non-Metallic, Silicone, Polyester And Wire Reinforced (For Coolant And Heating Systems Of Diesel And Gasoline Powered Engines)This CID covers polyester and wire reinforced, silicone compounded, elastomeric hose and hose assemblies, for coolant and heating systems of diesel and gasoline powered engines, with a temperature range from -40 deg. F to +425 deg. F. All hose types are intended for severe service such as on cars, buses, heavy duty military and commercial trucks, military combat vehicles, and off-road earth moving equipment. Type I (1/2 inch inside diameter (ID) thru 1 1/8 inch ID) hose is intended for connecting hot water heaters to coolant circulating systems of ground vehicles. The hose and hose assemblies described in this CID are hereinafter referred to as "hose".

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A-A-52426A

 

TABLE V. Hose diameter tolerances (types IV).

Nominal Size

I.D. (inch)

Inside diameter Tolerance (inch)

1/2

+.039 -.000

5/8

+.042 -.000

7/8

+.042 -.000

1 1/8

+.047 -.000

 

TABLE VI. Wall thickness limits (types I and II).

Inside diameter

Minimum (inch)

Maximum (inch)

All sizes

.170

.220

 

TABLE VII. Wall thickness limits (type IV).

Size (inch)

Minimum (inch)

Maximum (inch)

1/2

.144

.166

5/8

.144

.166

7/8

.142

.168

1 1/8

.155

.177

 

TABLE VIII. Tolerance on hose lengths (types I, III, & IV).

Over

To and including

Tolerance

(inch)

(inch)

(inch)

--

12

+3/16 -1/16

12

24

+1/4 -1/8

24

--

+1/2 -1/4

 

TABLE IX. Tolerances on preformed (type II) hose length.

Each end (measured from end to intersect of nearest centerline)

(inch)

+3/16 - 1/8

 

3.2.7 Hose length.

 

3.2.7.1 Type I. Unless otherwise specified (see 6.2), type I bulk hose shall be furnished in lengths of 3, 25 or 40 feet, or multiples thereof.

 

3.2.7.2 Type IV. Specify the length of type IV hose required in feet (see 6.2). The hose length includes the length of the steel end fittings.

 



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