ISO 17717:2017

INTERNATIONAL ISO
STANDARD 17717
First edition
2017-08
Meteorological balloons —
Specification
Ballons météorologiques — Spécifications
Reference number
©
ISO 2017
© ISO 2017, Published in Switzerland
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ii © ISO 2017 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 2
4.1 Colour . 2
4.2 Appearance . 2
4.3 Size, mass and dimensions . 2
4.4 Tensile Property . 4
4.4.1 General. 4
4.4.2 Tensile strength and elongation at break before accelerated ageing . 4
4.4.3 Tensile strength and elongation at break after accelerated ageing . 4
4.5 Bursting diameters . 4
4.6 Ozone resistance. 5
5 Sampling . 5
6 Packaging, marking, transport and storage . 5
6.1 Packaging . 5
6.2 Marking . 6
6.2.1 Paper box . 6
6.2.2 Container . 6
6.2.3 Certification of proof . 6
6.3 Transport and storage . 7
Annex A (normative) Visual inspection of meteorological balloons . 8
Annex B (normative) Inflatable inspection of meteorological balloons .10
Annex C (normative) Mass measurement .13
Annex D (normative) Dimension measurement .14
Annex E (normative) Burst test of meteorological balloons .17
Annex F (normative) Test method of ozone ageing of meteorological balloons .19
Bibliography .21
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).
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URL: w w w . i s o .org/ iso/ foreword .html
This document was prepared by Technical Committee ISO/TC 45, Rubber and rubber products,
Subcommittee SC 4, Products (other than hoses).
iv © ISO 2017 – All rights reserved

INTERNATIONAL STANDARD ISO 17717:2017(E)
Meteorological balloons — Specification
1 Scope
This document specifies the minimum requirements and test methods for meteorological balloons
made from natural rubber latex or natural rubber latex compounded with synthetic rubber emulsion.
This document applies to two types of balloon:
— Type 1: meteorological balloon produced by dipping process;
— Type 2: meteorological balloon produced by moulding process.
2 Normative references
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 37, Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties
ISO 188, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests
ISO 2859-1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by
acceptance quality limit (AQL) for lot-by-lot inspection
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// www .iso .org/ obp
3.1
air bubble
thin portion, with definite edge, concave or convex, which is created by air in the balloon film
3.2
body thickness
single-walled thickness of a meteorological balloon
3.3
cracking
localized cracks in the balloon film
3.4
grease mark
stains on the balloon film due to machine grease or oil
3.5
hole
opening due to a ruptured air bubble (3.1), foreign body impurities or other external factors
3.6
latex coagulum
gel adhered to inside and outside of the balloon film
3.7
permanent creases with adhesion of the film
localized occurrence of the balloon film folding over and sticking to itself
3.8
thin spot
portion of the balloon which has no defined edge and has a film thickness which is lesser than that of
the average thickness of the balloon film
4 Requirements
4.1 Colour
The balloon shall be natural coloured unless otherwise specified.
4.2 Appearance
When inspected according to Annex A, the appearance of the balloons shall conform to requirements in
Table 1. If the defect cannot be confirmed by visual inspection, then Annex B shall be referred to.
Table 1 — Appearance
Defects Requirements
hole, cracking Non-existent
grease mark Non-existent
Serious
permanent creases caused
defects
by balloon wall folded and Non-existent
adhered together
Air bubble and latex coagulum is allowed to exist, which is not concen-
air bubble, latex coagulum trated, obviously thin, not more than 5 mm in diameter and does not
affect the ball film stretching.
Light
defects
The thin spot is allowed to exist, is not concentrated, not obvious, does
thin spot not affect the ball film stretching and the length is not more than 10 mm,
double layer thickness is not less than 0,12 mm.
4.3 Size, mass and dimensions
When measured in accordance with Annex C and Annex D, the size, mass and dimensions of the type 1
meteorological balloons shall conform to the values given in Table 2, the size, mass and dimensions of
the type 2 meteorological balloons shall conform to the values given in Table 3.
Table 2 — Size, mass and dimensions of the type 1 meteorological balloons
Dimension
Mass
Body thick-
Size Body length Neck diameter Neck length Neck thickness
ness
g
mm mm mm mm
mm
10 10 ± 4 200 to 300 0,05 to 0,3 18 to 26 40 to 80 0,5 to 0,9
20 20 ± 4 245 to 355 0,05 to 0,3 20 to 28 40 to 80 0,5 to 0,9
30 30 ± 4 340 to 460 0,05 to 0,3 24 to 32 60 to 100 0,5 to 0,9
NOTE   In addition to the above sizes, balloons of other sizes are also available for customers with special requirements.
2 © ISO 2017 – All rights reserved

Table 2 (continued)
Dimension
Mass
Body thick-
Size Body length Neck diameter Neck length Neck thickness
ness
g
mm mm mm mm
mm
50 50 ± 5 520 to 680 0,05 to 0,3 25 to 33 60 to 100 0,5 to 0,9
70 70 ± 5 540 to 740 0,05 to 0,3 25 to 35 60 to 100 0,6 to 1,0
100 100 ± 10 560 to 800 0,05 to 0,3 26 to 40 70 to 110 0,8 to 1,2
200 200 ± 20 950 to 1 250 0,05 to 0,3 28 to 54 70 to 110 0,8 to 1,2
300 300 ± 30 1 300 to 1 700 0,05 to 0,3 38 to 65 100 to 160 0,8 to 1,2
350 350 ± 35 1 450 to 1 850 0,05 to 0,3 39 to 65 100 to 160 0,8 to 1,2
400 400 ± 35 1 500 to 1 900 0,05 to 0,3 40 to 65 100 to 160 0,8 to 1,2
500 500 ± 40 1 800 to 2 200 0,05 to 0,3 46 to 70 100 to 160 0,8 to 1,2
600 600 ± 50 2 000 to 2 400 0,05 to 0,3 49 to 75 100 to 190 0,8 to 1,2
700 700 ± 50 2 100 to 2 500 0,05 to 0,3 49 to 75 100 to 190 0,8 to 1,2
800 800 ± 60 2 100 to 2 500 0,05 to 0,3 51 to 80 100 to 190 1,0 to 1,4
1 000 1 000 ± 70 2 100 to 2 500 0,05 to 0,3 51 to 86 100 to 190 1,1 to 1,7
1 200 1 200 ± 100 2 700 to 3 300 0,05 to 0,3 55 to 86 100 to 210 1,1 to 1,7
1 600 1 600 ± 150 2 900 to 3 700 0,05 to 0,3 73 to 90 100 to 210 1,1 to 1,7
2 000 2 000 ± 150 2 900 to 3 700 0,05 to 0,3 74 to 90 100 to 210 1,1 to 1,7
3 000 3 000 ± 200 2 900 to 3 700 0,05 to 0,3 75 to 90 100 to 210 2,1 to 2,7
NOTE   In addition to the above sizes, balloons of other sizes are also available for customers with special requirements.
Table 3 — Size, mass and dimensions of the type 2 meteorological balloons
Dimension
Size Mass
Body length Body thickness Neck diameter Neck length Neck thickness
g
mm mm mm mm mm
20 20 ± 4 250 to 380 0,15 ± 0,05 12 to 18 70 to 100 1,1 ± 0,5
30 30 ± 4 300 to 420 0,15 ± 0,05 12 to 18 70 to 100 1,1 ± 0,5
50 50 ± 4 360 to 560 0,15 ± 0,05 12 to 18 70 to 100 1,1 ± 0,5
70 70 ± 5 550 to 750 0,15 ± 0,05 12 to 18 70 to 100 1,1 ± 0,5
100 100 ± 10 600 to 800 0,15 ± 0,05 12 to 18 70 to 100 1,1 ± 0,5
200 200 ± 12 850 to 1 050 0,15 ± 0,05 25 to 35 100 to 140 1,5 ± 0,5
300 300 ± 15 950 to 1 150 0,15 ± 0,05 25 to 35 100 to 140 1,5 ± 0,5
350 350 ± 20 1 100 to 1 350 0,15 ± 0,05 25 to 35 100 to 140 1,5 ± 0,5
400 400 ± 22 1 150 to 1 400 0,15 ± 0,05 25 to 35 100 to 140 1,5 ± 0,5
500 500 ± 25 1 400 to 1 700 0,15 ± 0,05 25 to 35 100 to 140 1,5 ± 0,5
600 600 ± 27 1 600 to 1 900 0,15 ± 0,05 25 to 35 100 to 140 1,5 ± 0,5
700 700 ± 28 1 700 to 1 950 0,15 ± 0,05 25 to 35 100 to 140 1,5 ± 0,5
800 800 ± 30 1 800 to 2 050 0,15 ± 0,05 25 to 35 100 to 140 1,5 ± 0,5
1 000 1 000 ± 35 1 950 to 2 150 0,15 ± 0,05 25 to 35 100 to 140 1,5 ± 0,5
1 200 1 200 ± 40 2 200 to 2 500 0,15 ± 0,05 25 to 35 100 to 140 1,5 ± 0,5
1 500 1 500 ± 45 2 300 to 2 600 0,15 ± 0,05 25 to 35 120 to 160 2,15 ± 0,55
NOTE  In addition to the above sizes, balloons of other sizes are also available for customers with special requirements.
Table 3 (continued)
Dimension
Size Mass
Body length Body thickness Neck diameter Neck length Neck thickness
g
mm mm mm mm mm
1 600 1 600 ± 50 2 300 to 2 700 0,15 ± 0,05 25 to 35 120 to 160 2,15 ± 0,55
2 000 2 000 ± 80 2 800 to 3 300 0,15 ± 0,05 40 to 60 160 to 200 2,15 ± 0,55
3 000 3 000 ± 110 3 200 to 3 800 0,15 ± 0,05 40 to 60 160 to 200 2,15 ± 0,55
NOTE  In addition to the above sizes, balloons of other sizes are also available for customers with special requirements.
4.4 Tensile Property
4.4.1 General
Tensile properties of balloons shall be measured in accordance with ISO 37, using three Type 1 or
Type 1A dumb-bell test pieces and taking the median value as the test result. Test pieces shall be taken
from the middle part of balloons and equidistantly distributed along the circumference of the balloon
body. The test pieces shall be flat and the edge shall be smooth.
4.4.2 Tensile strength and elongation at break before accelerated ageing
Tensile strength and elongation at break of the balloon before accelerated ageing shall comply with the
requirements given in Table 4.
4.4.3 Tensile strength and elongation at break after accelerated ageing
Accelerated ageing shall be conducted in accordance with the method specified in ISO 188. The
accelerated ageing conditions are (8 ± 0,25) h at (100 ± 1) °C or (168 ± 2) h at (70 ± 1) °C. For reference
purposes, the accelerated ageing conditions shall be (168 ± 2) h at (70 ± 1) °C. Tensile strength and
elongation at break of the balloon after accelerated ageing shall comply with the requirements given in
Table 4.
Table 4 — Tensile properties
Property Requirement
Tensile strength before accelerated ageing, MPa ≥ 17,0
Elongation at break before accelerated ageing, % ≥ 600
Tensile strength after accelerated ageing, (8 ± 0,25) h at (100 ± 1) °C or (168 ± 1) h at
≥ 16,0
(70 ± 1) °C, MPa
Elongation at break after accelerated ageing, (8 ± 0,25) h at (100 ± 1) °C or (168 ± 1) h at
≥ 600
(70 ± 1) °C, %
4.5 Bursting diameters
When tested in accordance with Annex E, the bursting diameters of the type 1 meteorological balloons
shall conform to the values given in Table 5, the bursting diameters of the type 2 meteorological
balloons shall conform to the values given in Table 6.
Table 5 — Bursting diameters of the type 1 meteorological balloons
Size 10 20 30 50 70 100 200 300 350 400
Bursting diameter, m ≥ 0,4 ≥ 0,9 ≥ 1,1 ≥ 1,3 ≥ 1,5 ≥ 1,6 ≥ 2,9 ≥ 3,7 ≥ 4,1 ≥ 4,4
Size 500 600 700 800 1 000 1 200 1 600 2 000 3 000 —
Bursting diameter, m ≥ 4,9 ≥ 5,8 ≥ 6,1 ≥ 6,6 ≥ 7,6 ≥ 8,0 ≥ 9,2 ≥ 10,0 ≥ 12,0 —
4 © ISO 2017 – All rights reserved

Table 6 — Bursting diameters of the type 2 meteorological balloons
Size 200 300 350 400 500 600 700
Bursting diameter, m ≥ 3,5 ≥ 4,3 ≥ 4,8 ≥ 5,2 ≥ 5,7 ≥ 6,8 ≥ 6,9
Size 800 1 000 1 200 1 500 1 600 2 000 3 000
Bursting diameter, m ≥ 7,4 ≥ 8,2 ≥ 8,9 ≥ 10,0 ≥ 10,5 ≥ 11,3 ≥ 13,5
4.6 Ozone resistance
When testing the test pieces in accordance with Annex F, crack, hole, split and other deterioration shall
not be visible on the test pieces during the time given in Table 7.
Table 7 — Ozone resistance
Size, g 300 350 400 500 600 700 800 1 000 1 200 1 500 1 600 2 000 3 000
Time, h 2 3
5 Sampling
The inspect unit of product is one balloon, the extent of nonconformity shall be expressed in terms of
nonconformities per 100 items. This document does not specify the size of a lot, but it is possible for a
purchaser to do so as part of the purchasing contract. Attention is drawn to the difficulties that can be
associated with the distribution and control of very large lots. The recommended maximum individual
lot size for production is 10 000.
For reference purpose, the balloons shall be sampled and inspected in accordance with single sampling
plans for normal inspection specified in ISO 2859-1. The inspection levels and acceptance quality limits
(AQLs) shall conform to the requirements in Table 8.
Table 8 — Inspection levels and acceptance quality limits
Characteristic Inspection level AQL
Special inspection level S-2 but at
Serious defects 4,0
least code letter D
Appearance
Special inspection level S-2 but at
Light defects 6,5
least code letter D
Special inspection level S-2 but at
Size
...