ISO 15886-2:2021 Agricultural irrigation equipment — Sprinklers —Part 2: Design and operation requirements

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INTERNATIONAL STANDARD ISO 15886-2:2021

Agricultural irrigation equipment — Sprinklers —

Part 2: Design and operation requirements

1 Scope

This document specifies the design and operational requirements of irrigation sprinklers and their test methods.

The term sprinkler is used in this document in a broad generic sense and it means to cover a wide variety of products as classified by ISO 158861‑ . This document applies to rotating sprinklers.

This document is applicable to sprinklers intended for installation on a pipe lateral and for operation with irrigation water.

2 Normative reference

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements 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 71‑ , Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions, tolerances and designation

ISO 158861‑ , 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 a nd definiti ons

For the purposes of this document, the terms and definitions given in ISO 158861‑ , ISO 15886‑3 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https://www.iso.org/obp

— IEC Electropedia: available at http://www.electropedia.org/

3.1

ambient temperature

temperature of the air surrounding a sprinkler (3.3)

3.2

clean water

water processed, if necessary, so as to contain suspended particles no larger than 74 μm (200 mesh equivalent) and to contain no dissolved chemicals known to have short‑ term effects on the sprinkler materials

ISO 15886-2:2021

3.3

sprinkler

water distribution device of a variety of sizes and types

EXAMPLE Impact sprinklers, fixed-nozzle sprinklers, irrigation guns.

3.4

nozzle

aperture of a sprinkler through which water is discharged

3.5

r e g u l at e d f low s pr i n k ler

sprinkler (3.3) that maintains a relatively constant flow rate (3.6) at varying water pressures at the sprinkler inlet within the limits specified by the manufacturer

3.6

f low r at e

volume of water flowing through a device per unit time

3.7

nom i n a l f low r at e

volume of water discharged per unit of time from a sprinkler (3.3) under test pressure (3.14)

3.8

inlet connection size

numerical designation used to characterize the sprinkler (3.3) which is identical to the size of the connection to the irrigation pipe

3.9

distribution curve

graphical plot of effective application rate (3.12) as a function of distance from a sprinkler (3.3) along a specified radius

3.10

irrigation lateral

branch supply line in an irrigation system on which distribution devices are mounted directly or by means of fittings, risers or tubes

3.11

sprinkler spacing

conventional designation including the distance between the sprinklers (3.3) along an irrigation lateral (3.11) and the distance between consecutive irrigation laterals

3.12

effective application rate

application rate equal to or exceeding 0.26 mm/h for sprinklers (3.3) with flow rates (3.6) exceeding 120 l/h and 0,13 mm/h for sprinklers with flow rates equal to or less than 120 l/h

3.13

range of working pressure

pressures between the minimum working pressure and the maximum working pressure

3.14

test pressure

P

n

pressure at the inlet of a sprinkler (3.3) declared by the manufacturer as the pressure to be used for test purposes

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