ISO/DIS 15886-2

Agricultural irrigation equipment -- Sprinklers

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DRAFT INTERNATIONAL STANDARD
ISO/DIS 15886-2
ISO/TC 23/SC 18 Secretariat: SII
Voting begins on: Voting terminates on:
2020-08-31 2020-11-23
Agricultural irrigation equipment — Sprinklers —
Part 2:
Design and operation requirements
ICS: 65.060.35
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ISO/DIS 15886-2:2020(E)
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ISO/DIS 15886-2:2020(E)
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ISO/DIS 15886-2:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative reference ......................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 General requirements ..................................................................................................................................................................................... 3

4.1 Materials ....................................................................................................................................................................................................... 3

4.2 Manufacture and installation ..................................................................................................................................................... 3

4.3 Connections ............................................................................................................................................................................................... 3

4.4 Performance requirements .......................................................................................................................................................... 4

5 General test conditions .................................................................................................................................................................................. 4

5.1 Accuracy of measuring devices ................................................................................................................................................. 4

5.2 Test pressure............................................................................................................................................................................................. 4

5.3 Test liquid .................................................................................................................................................................................................... 4

5.4 Atmospheric conditions .................................................................................................................................................................. 4

6 Strength tests ........................................................................................................................................................................................................... 5

6.1 Test of construction and parts ................................................................................................................................................... 5

6.2 Test resistance of threaded connections .......................................................................................................................... 5

6.2.1 Threaded connections to riser ............................................................................................................................. 5

6.2.2 Nozzle threads intended for threaded connection ............................................................................. 5

6.3 Test resistance to hydrostatic pressure at ambient temperature ............................................................... 5

6.3.1 Metal sprinklers ...................................................................... .......................................................................................... 5

6.3.2 Plastics sprinklers........................................................................................................................................................... 5

6.4 Test resistance to hydrostatic pressure at high temperature ......................................................................... 5

6.5 Test of watertightness ....................................................................................................................................................................... 6

7 Operating tests ....................................................................................................................................................................................................... 6

7.1 Installation of sprinklers under test ..................................................................................................................................... 6

7.2 Rotation speed uniformity test ................................................................................................................................................. 6

7.3 Flow rate uniformity test ............................................................................................................................................................... 7

7.4 Test of distribution characteristics ........................................................................................................................................ 7

7.5 Test of radius of throw ..................................................................................................................................................................... 7

7.6 Test of trajectory height .................................................................................................................................................................. 7

7.7 Flow rate as a function of inlet pressure .......................................................................................................................... 7

7.8 Test of range of working pressure .......................................................................................................................................... 7

8 Durability tests ....................................................................................................................................................................................................... 7

9 Identification and marking........................................................................................................................................................................ 7

9.1 Sprinklers .................................................................................................................................................................................................... 7

9.2 Nozzles ........................................................................................................................................................................................................... 8

10 Data to be supplied by the manufacturer ................................................................................................................................... 8

10.1 General data ............................................................................................................................................................................................... 8

10.2 Operating and performance data ............................................................................................................................................ 8

Annex A (INFORMATIVE)DROP SIZE TEST ..................................................................................................................................................... 9

© ISO 2020 – All rights reserved iii
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ISO/DIS 15886-2:2020(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

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This document was prepared by Technical Committee ISO/TC ..., title, Subcommittee SC ..., title.

Any feedback or questions on this document should be directed to the user’s national standards body. A

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iv © ISO 2020 – All rights reserved
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DRAFT INTERNATIONAL STANDARD ISO/DIS 15886-2:2020(E)
Agricultural irrigation equipment — Sprinklers —
Part 2:
Design and operation requirements
1 Scope

This part of ISO 15886 specifies the design and operational requirements of irrigation sprinklers and

their test methods.

The term sprinkler is used here in a broad generic sense and it means to cover a wide variety of products

as classified by ISO 15886-1. This standard applies to rotating sprinklers.

It is applicable to sprinklers intended for installation on a pipe lateral and for operation with

irrigation water.

Annex A addresses the procedures for characterizing the distribution of drop sizes discharged by the

sprinkler.
This Standard cancels and replaces ISO 7749-1.
2 Normative reference

The following referenced documents are indispensable for the application of this document. For dated

references, only the edition cited applies. For undated references, the latest edition of the referenced

document (including any amendments) applies.

ISO 7-1, Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions, tolerances

and designation

ISO 2859-1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by

acceptance quality limit (AQL) for lot-by-lot inspection
ISO 3951, parts 1 to 5, Sampling procedures for inspection by variables

ISO 15886-1, Agricultural irrigation equipment — Sprinklers — Part 1: Definition of terms and classification

ISO 15886-3, Agricultural irrigation equipment — Sprinklers — Part 3: Characterization of distribution

and test methods

ISO 15886-4, Irrigation equipment — Irrigation sprinklers — Part 4: Test methods for durability

3 Terms and definitions

For the purpose of this document, the terms and definitions given in ISO 15886-1, ISO 15886-3 and the

following apply:
3.1
ambient temperature
temperature of the air surrounding a sprinkler
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ISO/DIS 15886-2:2020(E)
3.2
clean water

water processed, if necessary, so as to contain suspended particles no larger than 74 microns (200 mesh

equivalent) and to contain no dissolved chemicals known to have short-term effects on the sprinkler

materials
3.3
sprinkler

water distribution device of a variety of sizes and types, for example, impact sprinklers, fixed-nozzle

sprinklers, irrigation guns
3.4
nozzle
aperture of a sprinkler through which water is discharged
3.5
regulated flow sprinkler

sprinkler that maintains a relatively constant flow rate at varying water pressures at the sprinkler inlet

within the limits specified by the manufacturer
3.6
flow rate
volume of water flowing through a device per unit time
3.7
nominal flow rate
volume of water discharged per unit of time from a sprinkler under test pressure
3.8
inlet connection size

nominal pipe size designation for commercial purposes or to manufacturer’s declaration defined by

reference to a recognized standard
3.9
nominal size

numerical designation used to characterize the sprinkler which is identical to the size of the connection

to the irrigation pipe
3.10
distribution curve

graphical plot of water application depth as a function of distance from a sprinkler along a specified radius

3.11
irrigation lateral

branch supply line in an irrigation system on which distribution devices are mounted directly or by

means of fittings, risers or tubes
3.12
sprinkler spacing

conventional designation including the distance between the sprinklers along an irrigation lateral and

the distance between consecutive irrigation laterals
3.13
effective application rate

application rate equal to or exceeding 0.26 mm/h for sprinklers with flow rates exceeding 120 l/h and

0.13 mm/h for sprinklers with flow rates equal to or less than 120 l/h
3.14
water application rate
mean depth of water applied per unit time
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ISO/DIS 15886-2:2020(E)
3.15
nozzle pressure

pressure measured immediately upstream from a nozzle or as inferred by a Pitot tube measurement at

the nozzle orifice
3.16
range of working pressures
pressures between the minimum working pressure and the maximum working pressure
3.17
test pressure (P )

pressure at the inlet of a sprinkler declared by the manufacturer as the pressure to be used for test

purposes
3.18
Pitot static tube

device to measure flow velocity at a point, operating on the principle of differential pressure

measurement
3.19
trajectory angle

angle above the horizontal plane of the water stream discharged from a sprinkler nozzle operating at

test pressure
4 General requir
...