Overview
ISO 17717:2024 - Meteorological balloons - Specification defines minimum requirements and test methods for meteorological balloons manufactured from natural rubber latex or natural latex compounded with synthetic rubber emulsion. The standard covers two production types: Type 1 (dipping process) and Type 2 (moulding process), and replaces the 2017 edition with technical revisions including expanded size ranges and updated sampling/test requirements.
Key topics and technical requirements
- Scope and balloon types: Applies to dipping and moulded meteorological balloons made of natural rubber latex (with or without synthetic emulsion).
- Appearance and defects: Visual acceptance criteria (Annex A) and inflatable inspection (Annex B) specify allowed/forbidden defects (e.g., holes, cracking, grease marks, air bubbles, thin spots, permanent creases).
- Size, mass and dimensions: Detailed tables provide size classes (from small ~10 g to large ~3 000 g), mass tolerances, body length, body thickness, neck diameter/length/thickness for both Type 1 and Type 2 balloons.
- Tensile properties: Test method per ISO 37 using dumb-bell specimens. Required minimums:
- Tensile strength before ageing: ≥ 17.0 MPa
- Elongation at break before ageing: ≥ 600%
- After accelerated ageing (per ISO 188: 8 h @ 100 °C or 168 h @ 70 °C): tensile strength ≥ 16.0 MPa, elongation ≥ 600%
- Bursting diameters: Burst tests defined in Annex E; specified bursting diameters listed separately for Type 1 and Type 2.
- Ozone resistance and ageing: Ozone ageing test methods described (Annex F) and requirements for retained properties after exposure.
- Sampling, packing and marking: Sampling plans reference ISO 2859‑1; requirements for packing, marking, transport and storage are included.
- Normative test annexes: Annexes C–F give prescriptive test methods for mass, dimensions, burst testing and ozone ageing.
Practical applications
- Ensures consistent quality and interchangeability of meteorological sounding balloons used in radiosonde launches and atmospheric research.
- Provides manufacturers with clear production tolerances and lab test protocols for quality control.
- Enables procurement teams and national meteorological services to specify and accept balloon shipments based on reproducible criteria.
- Guides test laboratories on validated methods for tensile testing, burst testing and ageing assessments.
Who should use ISO 17717:2024
- Balloon manufacturers and compounders (quality/production engineers)
- Meteorological agencies and research institutions (procurement/specification writers)
- Test laboratories and conformity assessment bodies
- Suppliers of atmospheric sounding equipment
Related standards (normative references)
- ISO 37 - Rubber - Determination of tensile stress‑strain properties
- ISO 188 - Rubber - Accelerated ageing and heat resistance tests
- ISO 2859‑1 - Sampling procedures for inspection by attributes
For implementation or purchase, consult your national standards body or ISO (www.iso.org).
