BIS Certification for Domestic Stainless Steel Vacuum Flask/Bottle IS 17526: 2021

• Made from high quality stainless steel
• Hygienic and suitable for daily use
• Provide effective thermal insulation
• Free from harmful chemicals
• Durable and sturdy design

1. Manufacturers (India): Must get BIS certification if insulated bottles are covered under QCO.
2. Foreign Manufacturers: Need certification to export stainless steel vacuum bottles to India.
3. Importers/Brand Owners: Must ensure that products are BIS certified before selling.
4. Sellers/Distributors: Should only sell certified insulated flasks.

• R (Required): Test must be conducted in the manufacturer’s in-house laboratory
• S (Subcontracting Allowed): Test can be conducted in a BIS-recognized or NABL-accredited external laboratory

• Material (Cl. 7.1) (S) - Ensures stainless steel and other raw materials meet IS 17526 requirements
• Welding Material Check (S) - Verifies suitability of welding consumables used in fabrication

• Manufacture & Workmanship (R) - Ensures overall product quality, finish, and construction compliance
• Welding Defects Check (R) - Ensures absence of cracks, porosity, or defects in welded joints

• Minimum Thickness of Outer Container (R) - Ensures required wall thickness for durability
• Coating Thickness Test (R) - Checks uniform protective coating layer
• Capacity Test (R) - Verifies correct volumetric capacity of flask/bottle
• Length of Shoulder Strap (R) - Ensures correct strap dimensions as per standard

• Heat Retention Capability (R) - Checks ability to maintain temperature over specified time
• Cold Retention Capability (R) - Ensures effective cooling performance retention

• Drop Impact Test (S) - Checks resistance against accidental drops
• Pendulum Impact Test (S) - Evaluates impact resistance under controlled conditions
• Fixing Strength of Handle (S) - Ensures handle can withstand load without failure
• Strength of Shoulder Strap (S) - Verifies durability under load conditions
• Strength of Cord (S) - Checks the strength of the cord suspension system
• Endurance Test for O-Ring, Stopper and Washer (S) - Ensures long-term mechanical durability

• Leakage Test (R) - Ensures no leakage under normal usage conditions
• Joint Leakage Test (R) - Checks sealing performance at joints and welds

• Stability of Flask/Bottle (R) - Ensures product remains stable on inclined surfaces
• Pour Test (R) - Verifies smooth and controlled pouring without spillage

• Staining Test (R) - Ensures surface resistance to stains and discoloration
• Finish & Appearance Check (R) - Ensures smooth surface and defect-free finish

• Salt Water Corrosion Test (S) - Checks resistance to corrosion in harsh environments
• Adhesion Test (S) - Ensures coating strongly adheres to metal surface
• Lead & Cadmium Test (S) - Ensures safety from toxic heavy metals
• Coating Thickness Uniformity (R) - Ensures consistent protective coating

• Leaching Test (S) - Ensures no harmful substances migrate into stored liquid
• Sensorial Test (S) - Ensures no odour, taste, or contamination in water

• Chemical Composition of Inner Container (S) - Verifies stainless steel grade and composition compliance

The BIS certification process ensures that domestic insulated bottles meet the required standards for proper and efficient operation. This process is defined by the Bureau of Indian Standards (BIS) and includes the following steps:

1. Online Registration: Manufacturers register on the BIS Manak portal by submitting company, factory, and product details. Foreign manufacturers must appoint an Authorized Indian Representative (AIR).
2. Testing at BIS-Approved Laboratory: Product samples are tested in BIS-approved laboratories for material safety, chemical migration, durability, leakage resistance, transparency, and overall hygienic suitability for the storage of hot or cold drinks.
3. Application Submission: The application is submitted along with test reports, technical documents, and factory details. Foreign manufacturers must also submit AIR-related documents.
4. Factory Inspection: BIS officials inspect the manufacturing unit to verify the production process, safety measures, and quality control system.
5. Grant of BIS License: If all requirements are met, BIS grants the certification license under Scheme-I.
6. Use of ISI Mark: After approval, the manufacturer can use the ISI mark on an insulated bottle with a CM/L number, confirming that the product meets BIS standards.