Threaded Steel Fasteners Hexagon Head Transmission Tower Bolts are highly preferred and commonly used fasteners in power transmission towers and strong structures. The fasteners are highly important in ensuring the structural integrity of power transmission towers in residential, commercial, and industrial power lines. Owing to the importance of these bolts in terms of their application, it becomes important that their manufacturers adhere to the requirements laid out in BIS IS 12427:2001.
As per the Indian Standard, there are certain technical requirements to be considered when dealing with hexagon head transmission tower bolts with regard to materials, dimensions, accuracy of thread, strength, resistance to corrosion, and other aspects of performance of such fasteners. Adherence to the BIS Quality Control Order (QCO) and getting BIS Certification for Fasteners is a guarantee of meeting the Indian Standard requirements. ISI Marking on transmission tower bolts assures the reliability of the products and industry acceptance.
What is IS 12427:2001 for Hexagon Head Transmission Tower Bolts
IS 12427:2001 specifies the requirements for threaded steel fasteners used in transmission towers, including material properties, mechanical strength, dimensions, coating requirements, and performance standards to ensure safe and reliable use in power transmission structures. As per the BIS (Bureau of Indian Standards), Hexagon head transmission tower bolts are:
- Tested for tensile strength
- Checked for dimensional and thread accuracy
- Evaluated for proof load performance
- Assessed for hardness
Benefits of ISI Mark Certification for Hexagon Head Transmission Tower Fasteners
ISI BIS Certification of Hexagon Threaded Steel Fasteners Transmission Tower Bolts in accordance with Indian Standard IS 12427:2001 provides the guarantee that the Indian Standards requirements pertaining to strength, durability, and safety of these products are fulfilled.
- Helps to ensure BIS certification of transmission tower bolts (IS 12427:2001)
- Increases tensile strength and bearing capacity of fasteners
- Enhances corrosion resistance in case of fastening electrical transmission tower equipment
- Improves the acceptance in power projects
- Increases ISI Mark certification of fasteners and bolts
- Reduces the risks of structural collapse of the tower
- Guarantees conformity to BIS quality control order (QCO) criteria
- Increases chances of winning government contracts and industrial projects
- Provides standardization of the production of threaded steel fasteners as per BIS standards
- Increases confidence in the use of certified industrial fasteners
BIS Certification Eligibility for Transmission Tower Bolts under IS 12427:2001
BIS Certification under IS 12427:2001 applies to manufacturers and suppliers engaged in the production or supply of hexagon head transmission tower bolts.
Applicable to:
- Manufacturers (India) - Must get BIS approval if the interior grade block boards are covered under QCO.
- Foreign Manufacturers - Need certification to export the decorative block boards to India.
- Importers/Brand Owners - Must ensure that the products are BIS-certified before sale.
- Sellers/Distributors - Should only sell certified hexagon head fasteners.
BIS Testing Requirements for Transmission Tower Bolts
To ensure the quality and structural strength of Hexagon Head Transmission Tower Bolts used in the construction of transmission towers and heavy engineering works, the Bureau of Indian Standards (BIS) sets out compulsory specifications as per IS 12427:2001 standards. The certification provided by the Bureau of Indian Standards ensures the manufacture of transmission tower bolts with good mechanical strength, size and load-bearing capacity. The BIS testing specifications for Hexagon Head Transmission Tower Bolts are stated as follows:
BIS Certification Process for Hexagon Head Transmission Tower Bolts
BIS certification for Hexagon Head Transmission Tower Bolts (IS 12427:2001) guarantees that the product conforms to all the necessary standards concerning its tensile strength, hardness, proof load, dimensions, coatings and mechanical properties. The Bureau of Indian Standards (BIS) certifies such products to ensure safety and reliability. The BIS certification process includes the following steps:
- 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).
- Testing at BIS-Approved Laboratory: Product samples are tested in BIS-approved laboratories for dimensional accuracy, thread inspection, tensile strength, proof load, hardness, wedge load performance, shear strength, head soundness, impact resistance and coating quality.
- Application Submission: The application is submitted along with test reports, technical documents, and factory details. Foreign manufacturers must also submit AIR-related documents.
- Factory Inspection: An official from BIS will go to the factory to see how the factory is manufacturing the product.
- Grant of BIS License: If all the requirements are met, the BIS will give the license to certify the product under Scheme-I.
- Use of ISI Mark: After the product is certified, the ISI mark will be affixed on the product along with the CM/L number.
Documents Required for BIS Certification under IS 12427:2001
| Document Category | Documents Required |
|---|
| Basic Details | GST Certificate, Email ID & Contact Number, Factory & Office Address, Rent Agreement / Lease Deed (if applicable),Partnership Deed (if applicable for partnership firms) |
| Manufacturing Details | List of Machinery, Process Flow Chart, Factory Layout Plan |
| Raw Material Details | List of Raw Materials, Supplier Details, Raw Material Invoices, Raw Material Test Certificates |
| Testing & Quality Control | List of Testing Equipment, Calibration Certificates, QC/Lab In-charge Appointment Letter & Qualification |
| Production Details | Annual Installed Capacity, Last Year Production Value |
| Product & Packaging Details | Quantity per Package, Nature of Packing, Product Printing / Marking Details |
| Management Details | Top Management Details, BIS Communication Contact Person |
| Brand & Certification Documents | Trademark / Brand Certificate, Consent Letter from BIS Recognized Laboratory |
| Additional Documents | Weekly Off Details, Hygiene Document (if applicable), Relaxation Letter (if applicable), Any Other Relevant Document |
| Foreign Manufacturer Requirement | Appointment of Authorized Indian Representative (AIR) for BIS coordination and compliance in India |
The Foreign manufacturers must designate an Authorized Indian Representative (AIR) in India. The representative is the local point of contact for the Bureau of Indian Standards (BIS) and manages all compliance and regulatory requirements in India.
BIS ISI Marking Requirements for IS 12427:2001
Once the BIS license is obtained by the manufacturer, the ISI Mark for the Hexagon Head Transmission Tower Bolt has to be permanently stamped on either the product itself or its packing in conformity with IS 12427:2001. Some of the other information that needs to be marked along with the name of the manufacturer, brand name and BIS license mark CM/L. More information can be found below: .
| Requirement | Details |
|---|
| ISI Mark | Indicates that the product is BIS certified and conforms to standards |
| Standard Number | IS 12427:2001 |
| CML Number | Certification Marks License (CML) number issued by BIS |
| Manufacturer Details | Name of manufacturer or registered trademark |
| Batch / Date | Batch number, heat number, or manufacturing date for traceability |
Note: Marking is typically applied using durable stamping, tagging, or permanent printing to ensure clear identification during handling, storage, and transportation, as per BIS marking requirements.
ISI Mark Certification Validity for Hexagon Transmission Tower Bolts under IS 12427:2001
| Particulars | Details |
|---|
| Initial Validity | Typically 1 to 2 years, depending on BIS approval conditions |
| Renewal | Must be renewed before expiry by submitting the application along with the prescribed fee and updated documents |
| Surveillance | Includes periodic factory inspections and market sample testing conducted by BIS |
| Compliance | Continuous following to standard and applicable Quality Control Orders (QCOs) is mandatory |
| Risk | Non-compliance or failed sample testing may lead to suspension or cancellation of the BIS license |
BIS License Fee for Hexagon Head Transmission Tower Bolts
The cost of BIS certification for Hexagon Head Transmission Tower Bolts (IS 12427:2001) under Scheme-I of the BIS consists of an application fee, inspection/audit fee, lab testing fee, license fee and marking fee. All these fees are as per BIS guidelines and can differ based on the scale of production.
| Charge Type | Indian Manufacturers | Foreign Manufacturers |
|---|
| Application Fee | INR 1,000 | USD 15 |
| Audit Charges | INR 7,000 | USD 3,200 – 5,900 |
| License Fee | INR 1,000 | USD 15 |
| Marking Fee | As applicable | As applicable |
| Testing Charges | As applicable | As applicable |
| EVTL India Consultancy Fee | As per actual | As per actual |
Note:
- Application fee for foreign manufacturers is payable via SWIFT (SAARC countries may pay in INR with applicable GST).
- Audit charges for foreign manufacturers vary based on country/location.
- The marking fee is determined based on the product category and production volume (MSME benefits may apply).
- Testing charges are to be paid directly to BIS-recognised laboratories.
- Consultancy fees can vary depending on product type and factory location.
Conclusion
Fasteners Hexagon Head Transmission Tower Bolts have become an important component for ensuring the safety and performance of power transmission towers since strength and reliability have great significance in these types of power towers. Adherence to IS 12427:2001 guidelines guarantees that manufacturers of these fasteners follow strict quality criteria such as mechanical strength, dimension, corrosion resistance and other performance parameters. Getting the BIS Certification for Hexagon Head Transmission Tower Bolts ensures the quality standardization of these fasteners as per Indian Standards and enables the manufacturer to mark their products with the ISI mark.
This will increase the credibility and acceptance in the market. Manufacturers who seek expert assistance in the certification process may approach EVTL India, a BIS Consultant for Fasteners.
