BIS Certification For Cranked-Link Mill Chains Or Welded Construction Is 13927

Crank-link mill chains are essential components in industrial machinery used for transportation and power transmission applications. These chains, which are often constructed of steel and designed for heavy-duty use, must meet exacting mechanical strength, durability, and safety standards.

To ensure consistent quality and reliability, the Bureau of Indian Standards mandates certification for crank-link mill chain or welded construction under IS 13927.

In this article, we will explain the importance of BIS certification for crank-link mill chains, IS 13927 standard requirements and the step-by-step process to obtain BIS license.

About Is 13927 Standard

IS 13927:1994 – Cranked-link mill chains or welded construction – Specification defines technical requirements for the design, material, dimensions and performance of welded construction crank-link chains.

These chains are mainly used in heavy mechanical work such as:

• sugar mills
• cement plants
• transportation and lifting systems
• steel and mining industry

The standard ensures that all chains conform to specific tensile strength, proof load, pitch and link design requirements. BIS reviews the standard from time to time to align it with technological advancements and security norms.

Why BIS Certification Is Mandatory

Under the Compulsory Registration Scheme (CRS) and Product Certification Scheme (ISI Mark) of BIS, certain mechanical products affecting safety and industrial efficiency must obtain certification before sale in India.

BIS certification for cranked-link mill chains:

• This ensures that the series meets quality and mechanical performance standards.
• Protects end users from substandard or unsafe products.
• The credibility of the manufacturer increases with the ISI mark, which is a symbol of trust and compliance.
• Facilitates easy market access for domestic and international manufacturers.

Scope of IS 13927:1994

IS 13927 standard includes:

• Material selection – specifies the type and grade of steel used for series components to ensure corrosion resistance and strength.
• Dimensions and design – Description of the nominal size, pitch and shape of cranked links, pins and bushings.
• Manufacturing and Welding – Maintains quality control during welding, heat treatment and assembly.
• Testing requirements – include proof load testing, breaking load testing and dimensional accuracy checks.
• Marking and Identification – The chain should be stamped or tagged with the manufacturer’s name, IS number and BIS license number (after certification).

Process for BIS Certification For Cranked-Link Mill Chains 

The certification is issued under the ISI Mark Scheme (Scheme-I) as per BIS (Conformity Assessment) Regulations, 2018.

Step 1: Submitting the Application

Manufacturers have to apply online through BIS ManOnline portal. The app includes:

• factory details
• Product Specifications
• manufacturing flow chart
• quality control measures
• test equipment list

Step 2: Document Verification

BIS officials review the submitted documents to verify that the factory setup conforms to IS 13927 requirements.

Step 3: Product Testing

Samples of the crank-link chain are tested for either:

• in a BIS-accredited laboratory, or
• In the manufacturer’s in-house lab (if approved)

Tests include proof load, ultimate tensile strength and dimensional conformance.

Step 4: Factory Inspection

A BIS officer visits the manufacturing unit for inspection:

• Raw material and process flow
• calibration of test equipment
• quality management system implementation

Step 5: Granting the License

If the product meets all the conformity parameters, BIS grants the license to use the ISI mark with standard number IS 13927.

The license is valid for two years, renewable upon compliance review.

Read More: Process for getting BIS for Certification

Documents Required for BIS Certification For Cranked-Link Mill Chains 

Below we mentioned required documents for BIS Certificate for cranked-link mill chains 

• Application Form (Through BIS Portal)
• Factory layout and process flow diagram
• quality control manual
• raw material test report
• Product testing report from BIS-accredited lab
• manufacturing equipment list
• Authorized Signatory ID Proof
• calibration certificate for test equipment

Read More: Documents Required For BIS Registration

Validity and Renewal

• Initial license validity: 2 years
• Renewal period: Up to 5 years depending on continued compliance
• Surveillance Audit: Conducted periodically by BIS to verify continued conformance

Timely renewal ensures uninterrupted production and market availability of BIS-certified products.

Benefits of obtaining BIS Certification For Cranked-Link Mill Chains 

Below we mentioned BIS Certificate for cranked-link mill chains 

• Builds trust with customers and industrial buyers
• Consistently ensures product quality and safety
• Enables participation in government and large-scale tenders
• Helps prevent product rejection or import/export bottlenecks
• Provides competitive edge through BIS-certified branding

How ELT Corporate Can Help

ELT is a leading consulting company specializing in corporate BIS certification and product compliance. Our team assists manufacturers in obtaining certification for mechanical, electrical and industrial products under various Indian standards.

Our services include:

• Identifying applicable BIS standards
• preparation of technical documentation
• To coordinate with BIS and testing laboratories
• arrange inspection and testing
• Ensuring quick and hassle-free authentication

Conclusion

BIS certification under IS 13927 symbolizes assurance that your crank-link mill chains meet Indian safety and quality standards. With the increasing focus on industrial efficiency and reliability, obtaining ISI Mark not only ensures compliance but also enhances your market reputation.

If you manufacture or import crank-link mill chains, now is the right time to begin your BIS certification process with expert guidance from ELT Corporate.