**NATURAL RESOURCES CONSERVATION SERVICE**

**Idaho**

**CONSTRUCTION SPECIFICATIONS**

**FOR**

> **IRRIGATION WATER CONVEYANCE**
>
> **PORTABLE ALUMINUM TUBING**

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(Owner/Operator)

\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

(Project/Title)

GENERAL

The pipe shall be installed in accordance with a design and plan
approved by the responsible technician. Details of construction shown in
the design and plan but not included here shall be considered as a part
of this specification. Construction activities shall be in accordance
with Department of Labor, Occupational Safety and Health Administration
(OSHA) regulations.

MATERIALS

Tubing for the pipe shall equal or exceed the chemical composition
requirements specified for drawn, extruded and welded tubing in one of
the following ASTM Standard Specifications:

> B 210 Aluminum and Aluminum-Alloy
>
> Drawn Seamless Tubes
>
> B 241 Aluminum and Aluminum-Alloy
>
> Seamless Pipe and Seamless
>
> Extruded Alloy
>
> B 313 Aluminum and Aluminum-Alloy
>
> Rounded Welded Tubes

The minimum wall thickness for pipe supplied under this Specification
shall be in accordance with values in Tables 1 and 2.

TABLE 1 -- WELDED IRRIGATION TUBING

Outside Minimum Wall Operating

Diameter Thickness Pressure\*\*

6 inch 0.051 inch\* 98 psi

6 inch 0.058 inch 108 psi

8 inch 0.064 inch 92 psi

10 inch 0.064 inch 73 psi

12 inch 0.064 inch 69 psi

Alloy 5050

TABLE 2 -- SEAMLESS EXTRUDED

IRRIGATION PIPE

Outside Minimum Wall Operating

Diameter Thickness Pressure\*\*

6 inch 0.058 inch 115 psi

8 inch 0.064 inch 96 psi

8 inch 0.072 inch\* 108 psi

10 inch 0.064 inch 77 psi

10 inch 0.094 inch\* 112 psi

ASTM 6063-T6 \*Not commonly stocked

> \*\*72 percent of theoretical yield pressure

Variations from specified dimensions for portable irrigation tubing
shall not exceed the amounts shown for welded tube in American National
Standard H 35.2, Dimensional Tolerances for Aluminum Mill Products.

JOINTS AND CONNECTIONS

All joints and connections shall be capable of withstanding the rated
pressure of the pipe without leakage, and shall leave the inside of the
pipe free of any obstructions that would reduce the pipe capacity below
design requirements.

Gaskets shall be according to pipe manufacturer's standard design
dimensions and tolerances. The gasket shall be a continuous elastomeric
ring and shall make the joint flexible yet water tight.

A dielectric connection shall be placed between any pump and the
pipeline.

INSTALLATION

The ground surface along the route of the pipe shall be smoothed and
shaped to provide contact along the entire pipe length or the pipe shall
be placed on saddles as specified on the drawings. Pipe shall not be
laid directly against rock outcrops.

Appurtenances shall be installed at locations and be of the type as
specified on the drawings. All appurtenances shall have suitable
markings that show Model No., pressure ratings, diameter, etc. as
applicable. When requested by the Technician, the Manufacturer's
technical performance data shall be provided to NRCS.

Butterfly valves and gates shall be installed per manufacture
recommendations.

TESTING

The system shall be given an operational test. This test shall consist
of filling the pipe with water, taking care to bleed of any air in the
pipe, and operating the pipe at design working pressure. All of the
system components shall operate without difficulty. Leaks shall be fixed
and defective materials shall be replaced.

BASIS FOR ACCEPTANCE

Pipe stamped with applicable ASTM requirements of this specification and
the manufacturer's name may be accepted without a material
certification. A material certification is required for unmarked pipe.
The certification will show applicable ASTM, pressure class,
manufacturer, pipe size, wall thickness, etc.

ADDITIONAL SPECIFICATIONS