What are the contents of the BS certificate inspection for the European standard hot water bag?

BS 1970:2012 is a core standard for rubber hot water bags in the UK and internationally. The tests cover five major categories: appearance marking, physical structure, sealing safety, material performance, and durability aging.
I. Appearance and Identification (4.1)
- No obvious bubbles, cracks, impurities or burrs on the surface
- Clearly marked: material, manufacturer, batch number, capacity, safety warning, maximum water temperature (usually ≤ 80℃)
- The water inlet diameter is ≥ 18mm, facilitating quick water filling
II. Physical Dimensions and Structure (4.2/4.3)
- Wall thickness: Meets the minimum thickness requirement (ensuring strength)
- Water filling port characteristics: Can fill the rated capacity within 30 seconds, and the inner wall does not stick together
III. Bottle Cap and Sealing System (5)
- The separation force of the spiral plug is ≥ 50N, with anti-detachment function.
- There is no leakage or separation at the connection points of the plug, metal ring, neck, and bottle body.
- The hardness of the rubber gasket is 55–80 IRHD, and the permanent deformation under compression ≤ 30% (at 70℃)
IV. Performance and Safety (6)
- Sealing property (6.1): No leakage at normal temperature, high temperature or under pressure.
- Joint strength (6.2): Bonded/Sealed joint ≥ 72N
- Pressure test (6.3): Fill with 80℃ hot water and maintain pressure at 0.3MPa for 30 minutes. There should be no bulging, deformation or leakage.
- Burst strength: Ultimate pressure resistance test, explosion-proof.
V. Mechanical Properties of Materials (6.4)
- Before aging: Tensile strength ≥ 12.0 N/mm, elongation at break ≥ 150%
- After thermal oxidative aging: Performance degradation ≤ 20%
- After immersion aging: Tensile/elongation retention rate meets standards
- Permanent deformation, tear strength, creep resistance, etc.
VI. Composition and Safety (3)
Compliant with EN 71-3, with restrictions on harmful substances such as heavy metals