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- Mandatory BIS Certification for valve fittings for compressed gas cylinders excluding liquefied petroleum gas cylinders under IS 3224.
- Applies to non-LPG high-pressure gas cylinders in India.
- Ensures safety, leak-tightness and performance of valve fittings.
- Requires factory audit and type testing by BIS.
- Buyers should verify valid IS 3224 certification on products.
Introduction
A manufacturer of high-pressure cylinder valves in Ahmedabad once shared how a major supply order slipped away simply because his valve fittings did not hold a valid BIS Certification for valve fittings for compressed gas cylinders excluding liquefied petroleum gas cylinders under IS 3224. He believed performance alone would satisfy the buyer, but the market today demands proof of compliance. In India’s industrial gas, medical oxygen and CNG sectors, a valve fitting must not only work, it must meet the exact requirements set by IS 3224 to guarantee safety under pressure. When certification is missing, customers walk away, insurance becomes complicated and the risk of product rejection increases dramatically. Bureau of Indian Standards
What is IS 3224?
IS 3224 is the designation of the Indian Standard for safety and performance requirements for valve fittings on compressed gas cylinders, not including LPG. It also ensures that a valve, used with permanent gas, liquefiable gas, and dissolved gas, will be appropriately designed, manufactured, and tested not installed improperly or leak for safety in operations. The 2021 version is for new valves for steel and aluminium cylinders with a maximum capacity of 1000-litre water capacity.
It includes:
- Standard for compressed gas cylinder valve fittings.
- This standard does not include LPG valves.
- The most current edition is IS 3224:2021 (Fourth Revision).
- This was specifically for the application to steel and aluminium cylinders up to 1000 L.
- Includes the material used, design, tests for compliance and marking for safety.
Understanding the ISI Mark Valve fittings for compressed gas cylinders
The ISI mark represents that the fittings:
- The ISI Mark shows that the valve fitting complies with BIS Product Certification Scheme-I requirements.
- It confirms the valve meets safety and quality standards of IS 3224 for compressed gas cylinders (excluding LPG).
- IS 3224-covered products are under mandatory BIS certification, so the ISI Mark is required for Indian market use.
- It indicates the manufacturer holds a valid BIS licence and the product has passed required testing and inspection.
- Users should still verify marking details like licence number, traceability info, and correct standard reference.
Why BIS Certification is Mandatory for fittings for compressed gas cylinders
- To maintain the safety of users while handling hazardous gases under high pressure.
- Because the government has specified that fittings for compressed gas cylinders must be compulsory certified.
- To provide assurance of quality and performance, based upon standard test methods.
- To ensure public safety and protect the users against unsafe materials.
- To avoid penalties or further complications from the sale of un-certified products in India.
Importance and Benefits of BIS Certification
| Importance | Benefits |
| Confirms valve fittings can withstand high-pressure gases safely | Reduces chances of leaks, bursts, and accidents during storage or transport |
| Mandatory compliance for gas cylinder components in India | Legal approval for production, imports, and nationwide market access |
| Protects industrial workers, medical users, and public environments | Builds confidence among gas suppliers, hospitals, and equipment buyers |
| Ensures standardised design, threading, materials, and performance as per IS 3224 | Minimises maintenance issues and compatibility problems with cylinders |
| Prevents unsafe or counterfeit fittings from entering supply chains | Strengthens brand trust and improves eligibility for major tenders and contracts |
Step-by-Step BIS Certification Process
Step 1: Documents
- The manufacturer prepares all technical documentation like technical drawings, certificates of materials and internal quality controls, as evidence of meeting the IS 3224 requirements.
Step 2: Product Validation
- Valve fittings samples are tested either at a NABL accredited laboratory or a BIS approved laboratory to pass tests for leak and high pressure integrity.
Step 3: Application
- Documents along with test reports, business details and payment are submitted to the BIS office through an online application portal.
Step 4: Evaluation and Factory Visit
- BIS personnel review all documents and follow-up with a visit to the manufacturing plant to access capacity, check on quality controls, and verify the product is the same as tested.
Step 5: Issuance of a License
- Assuming all goes well, the BIS issues a license to the manufacturer to apply the ISI mark. After a license is issued, the manufacturer is obligated to mark all valves with IS 3224 + license number and to ongoing comply with quality standards.
Documents Required for BIS Certification
| Category | Documents Required |
| Company Legal Documents | Company Registration Certificate, Factory Address Proof |
| Product Technical Documents | Technical Drawings, Product Specifications, Material Details |
| Testing & Compliance Documents | Test Reports from BIS/NABL Lab, IS 3224 Standard Compliance Proof |
| Quality System Records | Quality Control Procedures, Equipment & Calibration List |
| Brand Authorization | Trademark Certificate or Authorization Letter (if brand not owned by manufacturer) |
Timelines, Costs, Validity & Renewal
- Timeline:Typically 4–6 months including testing and factory inspection
- Cost:Depends on testing, application, inspection and licence fees (varies by product and scope)
- Validity:BIS licence is generally valid for 2 years
- Renewal:Can be renewed for 1–5 years if compliance and documentation remain satisfactory
Why Choose Diligence Certifications
- Expertise in BIS and regulatory certifications with significant industry prior experience
- Support throughout the process, including documentation, testing coordination and auditing assistance
- Rapid handling of processes, leveraging expertise and compliance network
- Trusted advice for manufacturers, importers and international brands entering into India
- High level of client satisfaction and professionalism throughout the process
Conclusion
Obtaining BIS Certification for valve fittings used in compressed gas cylinders under IS 3224 is a requirement for safety, compliance with regulations, and market acceptability in India. It establishes the appropriateness of materials to withstand high pressure and potential hazardous conditions. A certified product provides customer assurance and easier access to supply chains in the manufacturing and retail industries. Choosing the right compliance partner will help a company create a smooth application process with accurate documentation and an on-time approval. Diligence Certifications helps companies achieve hassle-free BIS compliance and maintain product integrity in the market for a significant period of time.
Frequently Ask questions
What is BIS Certification for valve fittings under IS 3224?
BIS certification is a mandatory approval for valve fittings used on compressed gas cylinders that guarantees the valve fittings are manufactured according to established performance and safety specifications of India.
Does the IS 3224 certification include valve fittings for LPG?
No. IS 3224 specifically excludes any valves that are for LPG cylinders.
Who needs this certification?
Manufacturers and importers of valve fittings for existing compressed gas cylinders in India.
Why is BIS Certification required for these items?
To help assure there are no leaks for user safety and help assure the performance and quality of high pressure gas commodities.
How long does it take to obtain BIS Certification?
Generally, 4 - 6 months, depending on whether the company is prepared for testing, documentation, and providing a factory audit.
What tests and/or inspection must be done for compliance to IS 3224?
The BSI standard requires the following testing / inspection: leak-tightness, pressure resistance, and performance. Material quality testing, if applicable, must be performed as described / required in the standard.
Can foreign manufacturers request BIS Certification?
Yes. However; they will be responsible to travel to India to complete the factory audit and obtain the BIS Certification.
How can buyers verify a product’s BIS approval?
Check the ISI mark, licence number and reference to IS 3224 printed on the valve body or packaging.
What is the validity of the BIS licence?
The licence is generally valid for 2 years and must be renewed before expiry.
What happens if a manufacturer sells non-certified valve fittings?
Products may be seized, penalized or rejected in the market due to non-compliance with Indian law.
