BIS Certification for Steel Frames for Doors | IS 4351:2024 | ISI Mark

Introduction

Steel Frames for Doors are widely used in residential buildings, commercial premises, institutional projects, industrial buildings and other construction applications. A properly manufactured steel door frame provides dimensional accuracy, reliable door installation, suitable hardware fixing and a durable finished surface.

For manufacturers seeking BIS certification and the ISI Mark for Steel Frames for Doors, the applicable current Indian Standard is IS 4351:2024 – Steel Frames for Doors. BIS identifies the standard as the Third Revision, and its official Product Manual is issued under Scheme-I of the BIS (Conformity Assessment) Regulations, 2018.

IS 4351:2024 replaced IS 4351:2003. BIS issued implementation guidelines on 05 February 2025 and specified 09 April 2025 as the last date for implementation of the revised standard, after which the 2003 standard was to stand withdrawn.

This article explains the BIS certification process for steel door frames, including product scope, raw materials, profiles, door designations, testing, sample requirements, grouping guidelines, Quality Assurance Plan, marking, factory inspection, documentation, cost and certification timeline.

What Is IS 4351:2024?

IS 4351:2024 is the Indian Standard for:

Steel Frames for Doors – Specification (Third Revision)

The current BIS Product Manual identifies:

IS Number: IS 4351:2024 Product: Steel Frames for Doors Revision: Third Revision Amendments: Nil Certification Scheme: Scheme-I / ISI Mark certification.

The standard covers different types, profiles, door designations, materials and finishes used in steel door-frame manufacture.

BIS Certification for Steel Frames for Doors

BIS certification for Steel Frames for Doors is carried out under Scheme-I, the BIS product certification system for use of the BIS Standard Mark / ISI Mark. The BIS Product Certification process requires assessment of the manufacturer's manufacturing infrastructure, production process, quality control and testing capabilities, together with establishment of conformity of the product through applicable testing.

The manufacturer must be capable of consistently producing steel door frames conforming to all applicable requirements of IS 4351:2024.

A BIS licence is linked to the specific varieties included within the approved scope.

Is BIS Certification Mandatory for Steel Frames for Doors?

There is an important distinction between BIS certification under Scheme-I and government-mandated compulsory certification.

The official IS 4351:2024 Product Manual confirms that certification is operated under Scheme-I and provides the complete procedure, sampling, grouping, inspection, testing and marking requirements.

BIS states that a product becomes legally subject to compulsory BIS certification when the Central Government brings that product under a compulsory certification notification.

Accordingly, manufacturers should verify the latest applicable government notification, project specification, procurement requirement or customer requirement before describing IS 4351 certification as universally compulsory. The ISI Mark licence route for IS 4351:2024 is available under Scheme-I.

Scope of Steel Frames for Doors Under IS 4351:2024

The BIS Product Manual provides the following main scope categories:

Type of Steel Frame

• Pressed Steel Frames
• Tubular Steel Frames

Door Designations

The Product Manual lists:

• SD7
• SD8
• SD9
• SD10
• SD11
• SD12
• DD12
• DD15
• DD18
• DD20
• DD22
• DD24

Profile Designations

Profiles include:

A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R and S, as well as other profile designs subject to the applicable BIS requirements and drawings.

Finish

The certification scope includes:

• Painting
• Powder Coating

Material

The Product Manual covers:

• Mild Steel
• Galvanized Steel
• Stainless Steel

Pre-painted galvanized steel is also included as a raw-material option under the revised standard.

Raw Materials Required for Steel Door Frames

IS 4351:2024 specifies the relevant raw-material requirements.

1. Mild Steel Sheet

Cold-rolled mild steel sheets are specified in thickness:

1.25 mm / 1.60 mm

and shall conform to IS 513 (Part 1).

2. Galvanized Steel Sheets

The Product Manual specifies:

• Plain Grade – Lock Forming (GPL)
• Zinc coating: 120 g/m²
• Thickness: 1.20 mm / 1.60 mm
• Conforming to IS 277.

3. Stainless Steel

The specified grades include:

• 316
• 316L
• 304S1
• 304S2

with thickness:

1.20 mm / 1.60 mm

and conformity to IS 6911.

4. Pre-Painted Galvanized Steel Sheets

The revised standard introduced pre-painted galvanized steel sheets as an additional raw-material option.

The specified thickness is:

1.20 mm / 1.60 mm

and the material is required to conform to IS 14246.

What Changed in IS 4351:2024?

BIS identified several important changes when IS 4351:2003 was revised to IS 4351:2024.

Modified Raw-Material Thickness

The thickness requirements for steel raw materials were changed.

New Pre-Painted Galvanized Steel Material

Pre-painted galvanized steel sheets were added as a permitted material.

Revised Sizes, Designations and Tolerances

Door-frame sizes, designations, tolerances and profile types were revised.

Tubular Steel Frame Profiles Added

The revised standard added requirements for tubular steel frame profiles.

Modified Hinge and Fitting Requirements

The provisions relating to hinges and fittings were revised.

Installation Recommendations Added

An additional clause concerning frame-installation recommendations was introduced.

Marking Clause Revised

The marking requirements were revised under Clause 11.

Pressed Steel Frames for Doors

Pressed steel frames are manufactured from formed steel sheets to achieve the required profile and frame geometry.

The BIS Product Manual identifies several construction and workmanship requirements for pressed steel frames, including:

• Frame construction
• Hardware reinforcement
• Mortar guards
• Lock strike plates
• Shock absorbers
• Rubber/EPDM seals
• Base ties
• Aldrops
• Sliding bolts
• Tower bolts

Frame assembly can include:

• Knockdown frames
• Mitered frames
• Welded frames.

Tubular Steel Frames for Doors

IS 4351:2024 also introduces a dedicated category for Tubular Steel Frame Profiles.

The Product Manual includes requirements relating to:

• Tubular frame profile
• Tubular frame construction
• Base ties
• Hardware fixing
• Modular mitered frames
• Mitered frames
• Welded frames.

A manufacturer seeking to include tubular frames in its certification scope must ensure that the applicable production and testing capability is available.

Door Frame Hinges and Hardware

Hinges and hardware are important parts of a steel door-frame assembly.

IS 4351:2024 includes specific requirements covering:

• Types of hinges
• Hinge locations
• Hinge fixing
• Hardware location

The revised standard changed the provisions relating to hinges and fittings, and BIS specifically requires existing licensees implementing the revised standard to establish conformity through the prescribed in-house factory test reporting for these revised provisions.

Construction and Workmanship Requirements

BIS conformity assessment checks the frame's construction and workmanship.

For pressed steel frames, the Product Manual specifically identifies requirements relating to frame construction, hardware reinforcement, mortar guards, lock strike plates, shock absorbers, rubber/EPDM seals, base ties and frame assembly.

For tubular frames, construction, base ties, hardware fixing and frame assembly are also included.

Manufacturers should ensure that production fixtures, forming operations, welding and assembly methods are consistent and capable of maintaining the required dimensions and construction details.

Dimensions, Sizes and Tolerances

Dimension control is a core part of IS 4351:2024.

The Product Manual specifically identifies:

• Wall-opening size
• Frame dimensions
• Sizes
• Tolerances
• Shapes and styles of door frames.

These parameters are important because a steel door frame must fit the intended door opening and allow proper installation and hardware operation.

Manufacturers should maintain appropriate measuring equipment and in-process inspection records.

BIS Testing Requirements for IS 4351:2024

The current BIS LIMS entry for IS 4351:2024 identifies a complete testing scope that includes the following major areas:

Material

Verification of the specified steel raw materials.

Wall Opening Size

Verification against the applicable requirements.

Dimensions

Measurement of the frame's specified dimensions.

Sizes

Assessment of the applicable size/designation.

Tolerances

Verification of dimensional tolerances.

Shapes and Style

Assessment of the applicable frame profile and shape.

Pressed Steel Frame Profile

Verification of the applicable pressed profile.

Frame Construction

Examination of construction and workmanship.

Hardware Reinforcement

Verification of reinforcement arrangements.

Mortar Guards

Inspection of mortar guards where required.

Lock Strike Plate

Verification of the lock strike-plate provision.

Shock Absorbers

Assessment of the required shock absorbers.

Rubber/EPDM Seal

Verification of applicable sealing arrangements.

Base Ties

Inspection of base-tie provisions.

Frame Assembly

Assessment of:

• Knockdown frame
• Mitered frame
• Welded frame

Tubular Steel Frames

The 2024 standard also includes testing/evaluation of tubular frame profiles and construction.

Hinges

Assessment of:

• Hinge types
• Hinge location
• Hinge fixing
• Hardware location

Finish

Assessment of painting and powder coating requirements.

Marking

Verification of the marking requirements under Clause 11.

Powder Coating Requirements

Powder coating is treated separately under the Product Manual.

For powder-coated steel door frames, the quality-control provisions include:

• Dry film thickness
• Finish characteristics
• Gloss
• Scratch hardness
• Flexibility
• Cross-cut adhesion
• Erichsen test
• Impact resistance
• Protection against corrosion
• Protection against humidity
• Resistance to boiling water
• Resistance to lubricating oil
• Resistance to petrol
• Resistance to heat
• Resistance to bleeding
• Resistance to detergent
• Resistance to acid/alkali.

The Product Manual states that dry film thickness is to be checked once every ten frames, while the broader powder-coating finish testing is recommended once every six months. An additional sample is required whenever there is a change in coating composition or coating process.

Paint Finish Requirements

For painted steel frames, the Product Manual refers to:

• Pretreatment and phosphating
• Painting

with the relevant test methods referenced to IS 1477 Part 1 and IS 1477 Part 2.

The manufacturer needs suitable production controls to maintain a consistent finish.

Sample Requirement for IS 4351:2024

The BIS Product Manual specifies:

1 complete steel door frame sample for the main tests.

For powder-coating testing, an additional sample requirement is stated as:

34 plates + 500 ml test liquid.

Before dispatching samples, the exact laboratory sample arrangement should still be confirmed according to the intended product scope and test program.

Grouping Guidelines for IS 4351:2024

The grouping rules are particularly important because manufacturers may produce many combinations of frame type, door designation, profile, material and finish.

The BIS Product Manual provides the following structure.

Frame Type

Each frame type must be tested for all applicable requirements, except the finish requirement, to include that type in the licence.

Therefore:

Pressed and Tubular are treated separately.

Door Designation

One frame sample of the highest door designation from each profile designation can cover the lower door designations up to the tested designation for that particular profile.

This can significantly affect the testing strategy.

Profile

Different profile designations are considered in the grouping structure.

Finish

Each finish is separately tested for the finish requirement.

For example:

• Painted finish
• Powder-coated finish

Material

A steel door frame of any material can be tested for the applicable requirements to cover the other materials in the licence scope, subject to the manufacturer's declaration regarding thickness and conformity of the material.

Scope Can Be Restricted

The manufacturer is required to declare the varieties it intends to include in the licence.

The declared scope can cover combinations of:

• Frame type
• Door designation
• Profile designation
• Finish
• Material

BIS states that the licence scope may be restricted based on the manufacturer's manufacturing and testing capabilities.

A manufacturer therefore does not necessarily have to include every possible variety in its first licence.

Other Profile Designs

If a manufacturer wants to include profile designations other than A to S, the Product Manual requires drawings of those profiles.

The drawing should contain information such as:

• Profile type
• Size
• Depth
• Height
• Rebate

as applicable.

This is important for manufacturers with proprietary or customized door-frame profiles.

Quality Assurance Plan for Steel Door Frames

Manufacturers receiving BIS certification are expected to operate a Quality Assurance Plan (QAP) covering regular testing and in-process controls.

The manufacturer must define:

• Control unit
• Test frequency
• Number of samples
• Applicable tests
• Record-keeping procedure.

The QAP is submitted to the concerned BIS Branch Office for information, and the manufacturer must follow the approved/declared quality-control system.

Definition of Control Unit

For guidance under IS 4351:2024, the Product Manual defines a control unit as:

Steel frames of the same type, door designation, profile designation, finish and material, manufactured from the same batch of raw material in a day.

This forms the basis for the recommended levels of production control and testing.

In-House Testing Facility

The Product Manual expects manufacturers to establish a suitably equipped and staffed in-house laboratory for routine testing and in-process controls where applicable.

The document classifies tests into:

R – Routine tests requiring appropriate testing capability

and

S – Tests that may be subcontracted.

Tests marked for subcontracting may be carried out through:

• BIS-recognized/empanelled laboratories, or
• Laboratories having valid NABL accreditation as per IS/ISO/IEC 17025.

MSME Relaxation for In-House Testing

For MSME manufacturers, maintaining an in-house laboratory for routine tests marked “R” is optional under the Product Manual.

MSMEs may use:

• Common cluster-based testing facilities
• Shared testing facilities
• BIS-recognized/empanelled laboratories
• NABL-accredited laboratories meeting the specified requirements.

This can be important for smaller manufacturers who do not maintain a full laboratory within the factory.

Testing Equipment Required

The BIS Product Manual gives an indicative equipment list.

Important equipment includes:

For Material

• Micrometer

For Construction and Dimensions

• Steel tape
• Steel scale
• Vernier caliper

For Hinges

• Steel tape
• Vernier caliper
• Micrometer
• Specified screws for hinge-related checks

For Finish

• Coat meter for coating thickness.

The manufacturer must maintain appropriate measuring capability and calibration/verification records as applicable.

BIS Factory Inspection for Steel Door Frames

BIS product certification under Scheme-I involves assessment of the manufacturer's:

• Manufacturing infrastructure
• Production process
• Quality control
• Testing capabilities

through a visit to the manufacturing premises. Product conformity is established through third-party laboratory testing, testing at the manufacturing premises or a combination of both, depending on the applicable certification route.

During inspection, manufacturers should be ready with:

• Production machinery
• Raw materials
• Finished products
• Inspection records
• Testing equipment
• Calibration records
• Quality-control records
• Factory layout
• Process controls
• Test reports.

Manufacturing Process for Steel Door Frames

The actual manufacturing process can vary according to pressed or tubular construction, but commonly involves:

Raw Material Receipt → Material Inspection → Cutting/Preparation → Forming/Fabrication → Hardware Reinforcement → Welding/Assembly → Hinge & Hardware Provision → Surface Preparation → Painting/Powder Coating → Final Inspection → Marking → Packing

The exact production flow should reflect the manufacturer's real manufacturing process and the capabilities declared to BIS.

BIS Marking Requirements for Steel Door Frames

Once the BIS licence is granted, the Standard Mark is required to be marked on each steel door frame, provided the product conforms to all applicable requirements.

The marking is to be carried out according to Clause 11 of IS 4351:2024.

The Product Manual additionally states that each stirrup plate or its package shall carry:

“For BIS certification details please visit www.bis.gov.in”

Manufacturers should ensure that the licence number and other marking details correspond to the actual BIS-approved licence scope.

What Information Should Be Kept for Traceability?

The manufacturer's production and quality records should allow the finished steel frames to be traced to the relevant control unit.

Important records can include:

• Raw-material batch
• Material test certificates
• Profile designation
• Door designation
• Frame type
• Finish
• Production date
• Inspection records
• Test records
• Calibration records
• Dispatch information

The Product Manual specifically requires test records to be maintained and made available for inspection where applicable.

BIS Certification Process for Steel Frames for Doors

Step 1 – Identify the Correct Standard

Confirm that the product falls under:

IS 4351:2024 – Steel Frames for Doors

Step 2 – Define the Intended Licence Scope

Finalize:

• Pressed/Tubular
• Door designations
• Profiles
• Materials
• Finish

Step 3 – Review Raw Materials

Confirm that the steel materials and thicknesses meet IS 4351:2024 and the referenced material standards.

Step 4 – Review Manufacturing Capability

Evaluate machinery, fabrication, forming, welding, assembly, finishing and inspection capabilities.

Step 5 – Prepare Testing Infrastructure

Arrange the required measuring and testing equipment and calibration records.

Step 6 – Select the Applicable Testing Arrangement

The conformity assessment may involve third-party laboratory testing, in-house testing or a combination according to the Scheme-I certification route.

Step 7 – Prepare Samples

Prepare the required representative steel door-frame sample and additional powder-coating test material where applicable.

Step 8 – Laboratory Testing

Conduct the applicable tests according to the standard and approved laboratory scope.

Step 9 – Prepare BIS Application

BIS Scheme-I applications are submitted online through the BIS certification portal.

Step 10 – Factory Assessment

BIS assesses the manufacturing infrastructure, process controls, quality control and testing capabilities.

Step 11 – Sample Evaluation

Product conformity is established through the applicable laboratory/factory testing.

Step 12 – BIS Scrutiny and Compliance

Any observations or non-conformities identified during evaluation need to be addressed.

Step 13 – Grant of Licence

After satisfactory assessment and conformity, BIS grants the licence to use the Standard Mark for the approved scope.

Documents Required for BIS Certification

Typical documentation can include:

• Company registration documents
• Factory address proof
• Manufacturing licence/registration documents
• GST and business details
• Factory layout plan
• Manufacturing process flow chart
• Machinery list
• Raw-material list
• Raw-material specifications
• Raw-material supplier details
• Raw-material test certificates
• Product specifications
• Model/profile details
• Product drawings
• Door designations
• Testing equipment list
• Calibration certificates
• Quality-control procedures
• Test records
• Brand/trademark documents
• Authorized signatory details
• Production capacity
• Previous production details, where applicable
• BIS test reports
• Application and supporting documents

The exact document set may vary depending on the manufacturer and application route.

BIS Testing Cost for IS 4351:2024

Current BIS LIMS entries show laboratory-specific testing charges for IS 4351:2024.

One current LIMS entry lists a complete scope with a testing charge of approximately:

₹24,900 excluding taxes.

Another current BIS LIMS laboratory listing shows approximately:

₹25,000 excluding taxes for specified IS 4351:2024 profile scope.

Therefore, a practical current laboratory-testing budget for the standard may start around ₹25,000 plus applicable taxes, subject to the selected laboratory, profile scope and test inclusions.

Testing prices are subject to change, so a current quotation should always be obtained before sample submission.

BIS Government Fees for Scheme-I Certification

BIS's current product-certification FAQ lists:

Application Fee: ₹1,000

Inspection Fee: ₹7,000 per man-day

After the decision to grant the licence:

Annual Licence Fee: ₹1,000

plus the applicable minimum marking fee for the product.

The applicable marking fee is product-specific and may change under BIS notifications.

Consultancy charges and laboratory charges are separate from BIS government fees.

Total Cost of BIS Certification for Steel Door Frames

The total project cost can include:

BIS Application Fee + Inspection Charges + Laboratory Testing + Annual Licence Fee + Applicable Marking Fee + Consultancy Charges + Applicable Taxes

The final amount depends on:

• Product scope
• Number of varieties
• Testing arrangement
• Laboratory
• Factory location
• Inspection requirements
• Marking-fee category
• Additional testing or corrections.

BIS Certification Timeline for Steel Frames

BIS's current FAQ indicates average timelines of approximately:

Option-1: around 4 months

Option-2: around 1 month

These are average indicative timelines and may vary because of queries, inspection scheduling, sample testing, documentation deficiencies and fee-related delays.

For a practical project, manufacturers should plan additional time for:

Technical Preparation → Sample Testing → Application → Factory Assessment → Corrections/Queries → Licence Grant

Why Steel Door Frame Manufacturers Face Delays

Common reasons include:

• Incorrect raw-material thickness
• Incorrect material grade
• Incorrect profile dimensions
• Wrong door designation
• Improper welding
• Hardware reinforcement issues
• Incorrect hinge location
• Poor frame alignment
• Improper base-tie arrangement
• Incorrect lock strike plate
• Inadequate sealing
• Powder coating thickness problems
• Surface-preparation problems
• Incomplete test records
• Missing calibration records
• Incorrect product drawings
• Incomplete factory documents
• Scope not properly defined
• Marking errors.

The revised standard also requires manufacturers to pay attention to changed designations, revised dimensional requirements and the new tubular-frame provisions.

How to Prepare Your Factory Before BIS Inspection

Before the BIS inspection, manufacturers should organize:

Factory

Ensure the production area is functional and representative of actual manufacturing.

Raw Materials

Keep incoming material identifiable through batch/lot records and supporting certificates.

Machinery

Keep forming, cutting, welding and finishing machinery operational.

Testing Equipment

Keep measuring instruments available and calibrated/verified as applicable.

Quality Records

Maintain:

• Incoming inspection records
• In-process inspection
• Final inspection
• Test records
• Calibration records
• Production records.

Product Samples

Keep representative varieties available for assessment.

Drawings

Maintain current profile and product drawings.

Marking

Prepare the proposed BIS marking in accordance with the licence and standard requirements.

Existing Manufacturers Transitioning from IS 4351:2003

Manufacturers previously certified under IS 4351:2003 were required to migrate to the revised IS 4351:2024 standard.

BIS identified the following actions for existing licensees:

• Updated raw-material thickness compliance
• In-house factory test reporting
• Revised door designations
• Updated dimensional and construction compliance
• New tubular frame option through change in scope
• Updated hinge/fitting requirements
• Revised marking implementation.

Manufacturers with old licences should therefore verify their current licence scope against the 2024 requirements.

Benefits of BIS Certification and ISI Mark for Steel Door Frames

A valid BIS licence allows an eligible manufacturer to use the BIS Standard Mark for the products and varieties covered within the licence scope.

It also provides a structured system for:

• Product standardization
• Manufacturing controls
• Raw-material verification
• Dimensional consistency
• Quality-control records
• Factory assessment
• Product conformity
• Traceability.

For manufacturers supplying institutional, commercial or project-based markets, maintaining the relevant BIS certification can also help demonstrate conformity where BIS certification is specified by a purchaser or contract.

Can the Licence Cover Both Pressed and Tubular Frames?

Yes, both categories can be included in the scope, but the BIS Product Manual treats Pressed and Tubular frame types separately for testing/grouping purposes. Each type must meet the applicable requirements for inclusion.

Can Different Door Designations Be Covered in One Licence?

Yes, the Product Manual provides grouping based on the highest door designation tested for each profile, allowing the lower designations up to that tested designation to be covered for that profile, subject to the stated grouping rules.

Can Different Materials Be Covered?

Yes, the grouping guideline permits testing of a steel door frame of one material to cover the other materials in the declared scope, subject to the manufacturer's declaration regarding thickness and conformity.

Can Painted and Powder-Coated Frames Be Covered Together?

The finish requirement is treated separately.

A frame with each finish—such as painting or powder coating—has to be evaluated separately for the applicable finish requirements to cover that finish across the relevant profiles.

Can a Manufacturer Restrict the BIS Licence Scope?

Yes. BIS states that the manufacturer declares the varieties intended for inclusion and that the scope can be restricted according to manufacturing and testing capabilities.

BIS Certification for Imported Steel Door Frames

The BIS product-certification framework is manufacturer-oriented, and an applicant must establish conformity and manufacturing capability for the product being certified. For foreign manufacturers, the applicable foreign-manufacturer certification route should be followed with BIS requirements applicable to the manufacturing location.

Imported products should not be treated as automatically covered merely because a domestic supplier or another factory holds a BIS licence.

Separate Manufacturing Location

BIS certification applications are tied to the manufacturing premises. BIS guidance for product certification indicates that certification is granted based on assessment of the manufacturer's manufacturing premises and capabilities.

Therefore, manufacturers operating multiple factories should review the need for separate applications for each manufacturing location.

Change in Scope of BIS Licence

A manufacturer can seek a change in scope when it wants to add eligible:

• Profiles
• Door designations
• Frame types
• Materials
• Finishes
• Other approved varieties.

The applicable BIS change-in-scope procedure and grouping requirements must be followed.

For tubular frames, the revised IS 4351:2024 implementation guideline specifically states that an existing licensee wanting to include tubular profiles should follow the change-in-scope provisions.

Renewal of BIS Licence

BIS certification under Scheme-I is subject to renewal.

BIS's FAQ states that Scheme-I certification may initially be granted for up to two years, and the licence may subsequently be renewed, subject to the applicable renewal process and requirements.

Manufacturers should monitor:

• Licence validity
• Production records
• Marking fees
• Revised standards
• Scope changes
• Surveillance requirements.

Frequently Asked Questions About BIS Certification for Steel Frames for Doors

1. What is the BIS standard for Steel Frames for Doors?

The current standard is IS 4351:2024 – Steel Frames for Doors – Specification (Third Revision).

2. Which BIS scheme applies to Steel Frames for Doors?

The BIS Product Manual states that certification is operated under Scheme-I of the BIS (Conformity Assessment) Regulations, 2018.

3. Is the ISI Mark available for Steel Door Frames?

Yes. Scheme-I is the BIS product-certification route for use of the Standard Mark/ISI Mark for conforming products.

4. Which standard did IS 4351:2024 replace?

It replaced IS 4351:2003. BIS specified 09 April 2025 as the implementation date after which the old standard was to stand withdrawn.

5. What types of steel door frames are covered?

The Product Manual covers Pressed and Tubular steel frames.

6. Which materials are covered?

Mild steel, galvanized steel and stainless steel are covered, with pre-painted galvanized steel included as an additional raw-material option.

7. What is the mild-steel sheet thickness?

The Product Manual specifies 1.25 mm and 1.60 mm cold-rolled mild steel sheet conforming to IS 513 Part 1.

8. What galvanized-sheet requirements are specified?

The Product Manual specifies plain-grade lock-forming galvanized sheets, zinc coating of 120 g/m², with thickness of 1.20 mm or 1.60 mm, conforming to IS 277.

9. Which stainless-steel grades are specified?

The listed grades include 316, 316L, 304S1 and 304S2, with 1.20 mm/1.60 mm thickness and conformity to IS 6911.

10. Is pre-painted galvanized steel permitted?

Yes. It was added as a new raw-material option in IS 4351:2024 and is referenced to IS 14246.

11. What are the door designations?

The Product Manual lists SD7, SD8, SD9, SD10, SD11, SD12, DD12, DD15, DD18, DD20, DD22 and DD24.

12. Which profile designations are covered?

Profiles A through S are listed, with provision for other profiles subject to drawings and requirements.

13. How many samples are required?

The Product Manual specifies one steel door frame for the main testing, with additional powder-coating test material of 34 plates and 500 ml test liquid where applicable.

14. What are the main tests?

Testing covers material, wall opening size, dimensions, sizes, tolerances, profiles, construction, hardware, hinges, finish and marking.

15. Is powder-coating testing required?

Yes, where powder coating is included in the licence scope. The Product Manual contains requirements for dry-film thickness and broader coating-performance characteristics.

16. How often is powder-coating thickness checked?

The recommended control level states one test every ten frames for dry-film thickness.

17. How often is broader powder-coating finish tested?

The Product Manual recommends the applicable finish tests once every six months, with additional testing when coating composition or process changes.

18. What is the control unit?

Steel frames of the same type, door designation, profile designation, finish and material produced from the same batch of raw materials in one day constitute the recommended control unit.

19. Is an in-house laboratory required?

Large manufacturers are expected to maintain suitable in-house routine-testing facilities. MSMEs have flexibility to use shared, cluster-based or eligible external facilities under the Product Manual.

20. What instruments are useful for routine checks?

The Product Manual lists instruments such as micrometers, steel tapes, steel scales, vernier calipers and coating-thickness meters.

21. Is factory inspection required?

Scheme-I certification involves assessment of manufacturing infrastructure, production process, quality control and testing capability at the manufacturing premises.

22. What is the current laboratory testing cost?

Current BIS LIMS entries show approximately ₹24,900 to ₹25,000 excluding taxes for IS 4351:2024, depending on the laboratory and scope.

23. What is the BIS application fee?

BIS's current FAQ lists an application fee of ₹1,000 for product certification.

24. What is the inspection fee?

BIS currently lists ₹7,000 per man-day for inspection.

25. Is an annual licence fee applicable?

Yes. BIS currently lists an annual licence fee of ₹1,000, in addition to the applicable marking fee.

26. Can the manufacturer include only selected profiles?

Yes. The scope may be restricted according to the varieties declared and the manufacturer's manufacturing/testing capabilities.

27. Can a higher door designation cover smaller ones?

Yes, the grouping guideline allows a sample of the highest tested door designation for a profile to cover lower door designations up to the tested designation, subject to the prescribed grouping conditions.

28. Can one material test cover other materials?

The grouping guideline allows a steel frame of any material to be tested for the relevant requirements to cover other materials in the licence scope, subject to the required declaration and conformity conditions.

29. Can a painted frame cover powder-coated frames?

The finish requirements are handled separately, so painted and powder-coated finishes require separate consideration.

30. Is tubular framing covered in the revised standard?

Yes. Tubular steel frame profiles and related construction provisions were added in IS 4351:2024.

31. Can a manufacturer include a proprietary profile?

Yes, subject to applicable BIS requirements; drawings of the other profile must be submitted with details such as type, size, depth, height and rebate.

32. Is BIS certification automatically mandatory for every steel door frame manufacturer?

The existence of a Scheme-I certification route does not by itself establish universal compulsory certification. Compulsory status depends on the applicable Central Government notification or other binding requirement.

33. What is the approximate certification timeline?

BIS's FAQ gives average indicative timelines of approximately one month for one Scheme-I option and four months for the other, with actual duration depending on testing, inspection, queries and application completeness.

34. Can additional varieties be added later?

Yes, manufacturers can apply for change in scope according to BIS procedures.

35. What happens if the manufacturer fails to meet the revised requirements?

The manufacturer may need corrective action, additional in-house testing, revised documents, retesting or scope modification depending on the issue and BIS direction.

36. What information should be maintained after certification?

Manufacturers should maintain raw-material, production, inspection, testing, calibration and traceability records needed to demonstrate continued conformity.

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Related Standards and Door Products

Manufacturers in the door and building-products sector may also need to review related Indian Standards for:

• Door handles
• Door hinges
• Tower bolts
• Sliding door bolts
• Door closers
• Aluminium-framed doors
• Timber door frames
• Door shutters
• Other building hardware and frame products.

The applicable standard depends on the exact product and construction.

Why Choose Qualitance India for BIS Certification?

Qualitance India provides BIS certification consultancy support for manufacturers seeking BIS/ISI Mark certification.

Our support can include:

Product & Standard Identification

Reviewing the product against IS 4351:2024 and identifying the applicable scope.

Scope Planning

Assistance in deciding the appropriate combination of:

• Pressed/Tubular
• Door designations
• Profiles
• Materials
• Finishes.

Technical Documentation

Support with:

• Product drawings
• Specifications
• Raw-material details
• Process flow
• Machinery details
• Testing equipment
• Quality-control documents.

Laboratory Coordination

Assistance with sample preparation and suitable laboratory coordination.

Test Report Review

Reviewing the test report and product details before proceeding with the BIS application.

BIS Application Support

Assistance with online application preparation and supporting documentation.

Factory Inspection Support

Guidance for factory readiness, testing facilities, documents, records and product scope.

Query Resolution

Support in preparing responses to BIS observations and deficiencies.

Scope Extension and Renewal

Assistance with adding profiles, types, materials and finishes and maintaining certification.

BIS Certification Process at a Glance

Product Assessment → IS 4351:2024 Scope Identification → Raw-Material Verification → Scope & Grouping Finalization → Sample Preparation → Laboratory/Factory Testing → BIS Application → Factory Assessment → Compliance → Licence Grant → ISI Marking

Contact Qualitance India

Qualitance India BIS Certification & Compliance Consultancy

Phone: +91 93106 15170 Email: info@qualitanceindia.com Website: https://qualitanceindia.com/

Manufacturers looking for BIS Certification for Steel Frames for Doors, IS 4351:2024 testing, ISI Mark licence, profile approval, tubular/pressed frame certification, change in scope, renewal or factory inspection support can contact Qualitance India.

Conclusion

IS 4351:2024 – Steel Frames for Doors is the current third-revision Indian Standard for steel door frames. BIS operates its certification through Scheme-I, under which manufacturers can obtain a licence to use the BIS Standard Mark / ISI Mark for the approved product scope.

The revised standard introduced important changes covering raw-material thicknesses, pre-painted galvanized steel, revised sizes and designations, tubular steel frame profiles, hinge and fitting requirements, installation recommendations and marking.

For certification, manufacturers need to carefully define the licence scope, verify raw materials, maintain appropriate manufacturing and testing capabilities, prepare representative samples, complete the applicable testing, undergo BIS assessment and maintain ongoing quality-control records.

The current BIS Product Manual also provides clear grouping provisions for frame types, door designations, profiles, materials and finishes, making proper scope planning before testing an important part of the certification process.

Qualitance India provides end-to-end consultancy support for BIS Certification for Steel Frames for Doors as per IS 4351:2024, ISI Mark licence, testing, documentation, factory inspection, scope extension and renewal.