BIS Certification Consultancy for Cast Iron Manhole Covers & Frames | IS 1726:1991

BIS Certification Consultancy for Cast Iron Manhole Covers & Frames | IS 1726:1991

Introduction

Cast iron manhole covers and frames are important infrastructure components used for providing access to underground drainage, sewerage, utility and inspection systems. These products must withstand specified loads and maintain dimensional accuracy, proper seating, strength and durability during service.

For Cast Iron Manhole Covers and Frames, the applicable Indian Standard is IS 1726:1991. The BIS Product Manual for this product provides certification requirements under Scheme-I, including sampling, product grouping, testing equipment and inspection and testing controls. The current BIS Scheme-I listing also includes IS 1726:1991 – Cast iron man hole covers and frames under the Cast Iron Products category.

Qualitance India provides complete BIS Certification consultancy for Cast Iron Manhole Covers & Frames, supporting manufacturers from product identification and sample planning through testing, documentation, BIS application, factory assessment preparation, licence processing and post-licence compliance.

What is IS 1726:1991?

IS 1726:1991 is the Indian Standard for Cast Iron Manhole Covers and Frames.

The standard addresses requirements intended to control:

• Material
• Manufacture
• Workmanship
• Performance/load-bearing capability
• Minimum weight
• Dimensions and tolerances
• Coating
• Marking
• Packing

The BIS Product Manual confirms that the product is certified under Scheme-I and identifies cast iron under Clause 4.1 of IS 1726:1991 as the relevant raw-material requirement.

Why BIS Certification is Important for Manhole Covers

Manhole covers are exposed to substantial mechanical loads and environmental conditions. Poor-quality or improperly manufactured covers can create safety and maintenance problems.

BIS certification helps manufacturers demonstrate conformity with the applicable Indian Standard and provides a controlled framework for production and quality assurance.

For manufacturers supplying infrastructure, municipal, drainage, sewerage and government projects, the applicable BIS certification can be particularly important where regulatory or procurement requirements demand conforming products.

Is BIS Certification Mandatory for IS 1726:1991?

Yes, the product is covered under the Cast Iron Products (Quality Control) Order, 2024.

The QCO requires specified cast iron products to conform to the corresponding Indian Standard and bear the Standard Mark under a BIS licence as per Scheme-I. For IS 1726:1991, the general implementation date was 1 September 2024, with implementation dates of 1 December 2024 for small enterprises and 1 March 2025 for micro enterprises. The QCO also provides specified exemptions, including certain domestic manufacturing for export and qualifying very small enterprises meeting the stated Udyam, investment and turnover conditions.

The current BIS Scheme-I page continues to list IS 1726:1991 under Cast Iron Products, alongside the 2023 and 2024 QCO references.

Manufacturers should verify the latest government notification and applicable exemptions for their specific circumstances before relying on an exemption.

BIS Product Manual for IS 1726:1991

The BIS Product Manual currently available for IS 1726:1991 is PM/IS 1726/1/April 2020.

According to the manual:

• Certification is under Scheme-I
• Raw material: Cast Iron as specified under Clause 4.1
• Grouping: Annex A
• Sample size: 1 set consisting of manhole cover and frame
• All prescribed tests are listed as possible to complete in one day
• A suitable laboratory must be maintained
• Calibration planning and test records are required
• Conforming production covered under the licence is to bear the Standard Mark

Grades of Cast Iron Manhole Covers Under IS 1726:1991

The Product Manual identifies four main grade designations:

Light-Duty – LD-2.5

Specified shapes and sizes include:

• Rectangular: 450 × 600 mm
• Square: 450 × 450 mm
• Square: 400 × 400 mm
• Circular: 370 mm
• Circular: 350 mm

Medium-Duty – MD-10

Specified shapes and sizes include:

• Circular: 450 mm
• Circular: 480 mm
• Circular: 500 mm
• Rectangular: 450 × 600 mm

Heavy-Duty – HD-20

Specified shapes and sizes include:

• Circular: 500 mm
• Circular: 560 mm
• Circular: 600 mm
• Lamphole: 350 mm
• Square: 560 × 560 mm
• Rectangular / Scrapper Manhole: 450 × 900 mm

Extra-Heavy-Duty – EHD-35

Specified shapes and sizes include:

• Circular: 560 mm
• Circular: 600 mm
• Square: 560 × 560 mm
• Rectangular / Scrapper Manhole: 600 × 900 mm

BIS Grouping Guidelines for Manhole Covers

Grouping is a major consideration when applying for BIS certification because a manufacturer may produce different grades, shapes and sizes.

The BIS Product Manual provides specific grouping provisions.

Circular and Lamphole Shapes

One sample of the highest grade designation and highest size from the circular shape may be tested to cover all circular sizes and grade designations up to and including the grade and size tested.

The manual also states that when a circular manhole cover and frame of HD-20 is tested, the lamphole shape may also be covered in the licence scope.

Rectangular, Square and Scrapper-Manhole Shapes

One sample from the highest grade designation and highest size of the relevant rectangular, scrapper-man-hole or square shape may be tested to cover sizes and grade designations up to and including the grade and size tested.

The manufacturer must declare the varieties intended for inclusion in the licence.

The final licence scope can be restricted according to the manufacturer’s manufacturing and testing capability, and BIS expects the types and sizes included in the licence scope to be tested in rotation during licence operation as far as possible.

BIS Sample Requirement for IS 1726:1991

The BIS Product Manual specifies:

Sample Size: 1 complete set of manhole cover and frame.

Correct sample selection is particularly important when a manufacturer is seeking coverage of multiple grades, shapes and sizes.

Raw Material Requirements

Cast iron is the specified raw material under Clause 4.1 of IS 1726:1991.

The BIS Scheme of Inspection and Testing refers to the applicable cast-iron requirements and connects the material control to IS 210:2009. The manufacturer’s material-control arrangements therefore need to ensure conformity with the applicable material provisions before production is released.

Raw-material records should be maintained for traceability and quality control.

Manufacturing Process for Cast Iron Manhole Covers

A typical manufacturing process may include:

Raw Material Selection → Charge Preparation → Melting → Chemical/Material Control → Mould Preparation → Casting → Shakeout → Fettling → Grinding/Finishing → Machining Where Applicable → Dimensional Inspection → Load/Performance Testing → Coating → Marking → Packing

The exact process depends on the manufacturer’s foundry arrangement, product design and equipment.

The manufacturer should be able to consistently produce covers and frames meeting the applicable construction, dimensional, performance and finishing requirements.

Main BIS Tests for Cast Iron Manhole Covers

1. Material

Material conformity is an important requirement.

The BIS Product Manual identifies material as a required control and refers to IS 210:2009 for the relevant material requirements.

2. Manufacture and Workmanship

Each manufactured cover and frame must meet the applicable manufacturing and workmanship provisions.

The BIS inspection plan specifies manufacture and workmanship checks for each cover and frame.

3. Performance / Load Test

Load-bearing performance is one of the most important requirements for manhole covers.

The Product Manual prescribes a load test with one sample for every 50 or part thereof for each manufactured grade, type/shape and size. It also refers to the failure provisions under Clause 10.1 of IS 1726:1991.

4. Minimum Weight

Minimum weight is also controlled.

The inspection plan specifies minimum-weight checking on each cover and frame, with the applicable requirements subject to the relevant agreement between manufacturer and purchaser.

5. Dimensions and Tolerances

Dimensional accuracy is important for proper seating and interchangeability.

The prescribed checks cover relevant dimensions and tolerances according to the standard’s tables and figures.

The BIS inspection plan specifies dimensional checking for each cover and frame.

6. Coating

Where coating requirements apply, the prescribed coating checks must be maintained.

The BIS Product Manual includes coating in the inspection plan with a testing frequency of once a week.

7. Marking and Labelling

Conforming production covered under the BIS licence must be marked according to the requirements of IS 1726:1991 and applicable BIS licence conditions.

The Product Manual specifically states that all production conforming to the Indian Standard and covered by the licence should bear the Standard Mark.

8. Packing

Packing must comply with the applicable standard and product requirements.

BIS Testing Equipment for Manhole Covers

The BIS Product Manual identifies the following major testing and inspection facilities:

Material

• Universal Testing Machine
• Hardness-testing facility
• Standard hardness block
• Relevant measuring/observation arrangement

Key Holes and Dimensions

• Steel tape/scale
• Vernier caliper
• Angle protractor
• Micrometer

Weight

• Weighing balance

Load Test

• Hydraulic load-test apparatus
• Load gauge
• Bearing block
• Stop watch

Coating

• Hot-air oven
• Deep freezer capable of maintaining 0°C
• Thermometer

The Product Manual states that this equipment list is indicative and should not be treated as exhaustive.

In-House Laboratory Requirements

The manufacturer is required to maintain a suitably equipped and staffed laboratory for the applicable tests.

The Product Manual also requires:

• Calibration planning for testing equipment
• Maintenance of test records
• Appropriate testing facilities
• Control of testing activities
• Records demonstrating conformity

The applicable testing arrangement should be finalized according to the current BIS requirements and the manufacturer’s scale and facilities.

Scheme of Inspection and Testing

A proper inspection and testing system is essential for maintaining consistent production.

The BIS manual provides controls for:

• Material
• Manufacture and workmanship
• Performance/load test
• Minimum weight
• Dimensions and tolerances
• Coating
• Marking/packing

The manual also provides provisions under which the manufacturer can define its own control unit/batch/lot and propose levels of control with suitable justification for approval by the Branch Office Head.

Factory Inspection for BIS Certification

The BIS certification process requires the manufacturer to demonstrate that the factory can consistently manufacture conforming products.

Before inspection, the manufacturing unit should be prepared with:

• Foundry and production facilities
• Suitable moulding arrangements
• Melting/casting facilities
• Product-specific machinery
• Measurement equipment
• Load-testing arrangement
• Material-testing facilities
• Coating facilities where applicable
• Calibration records
• Inspection records
• Raw-material records
• Production records
• Quality-control documentation
• Marking and packing arrangements

Qualitance India helps manufacturers review their factory readiness before the applicable BIS assessment.

BIS Certification Process for Cast Iron Manhole Covers

The typical certification process is:

Product Identification → IS 1726:1991 Applicability Check → Product Grade/Shape/Size Review → Grouping → Factory Assessment → Documentation → Sample Preparation → Testing → BIS Application → Factory Inspection → Compliance → Licence Grant → Standard Marking → Post-Licence Compliance

The exact sequence and documentation can vary depending on the manufacturing unit and BIS assessment requirements.

Documents Required for BIS Certification

Common documents include:

• Company registration documents
• Factory address proof
• Factory ownership/lease documents
• Manufacturing process flow chart
• Factory layout
• Machinery list
• Testing equipment list
• Calibration certificates
• Product drawings
• Product specifications
• Grade/type/size details
• Raw-material details
• Raw-material test certificates
• Quality-control records
• Test reports
• Authorized signatory documents
• Applicable undertakings and declarations
• Brand/trademark documents where applicable

A product-specific checklist should be prepared before filing the application.

BIS Certification Cost for Cast Iron Manhole Covers

The total cost depends on product scope, testing requirements, factory condition and the certification route.

Potential cost components include:

• BIS application and government fees
• Testing charges
• Sample preparation
• Factory inspection-related expenses
• Calibration
• Testing equipment
• Documentation
• Consultancy charges
• Licence-related expenses
• Ongoing compliance

Current BIS LIMS Testing Charges

Current BIS LIMS listings for IS 1726 (1991) show different testing entries depending on the laboratory scope.

Examples presently displayed include:

• ₹7,500 excluding taxes for an entry covering all sizes
• ₹7,600 excluding taxes for an entry covering the designation range Light, Medium, Heavy and Extra Heavy Duty
• Another current LIMS entry displays ₹11,000 excluding taxes for a testing scope that includes the principal requirements, with certain exclusions/remarks.

Actual testing charges can vary by laboratory, scope, sample configuration, exclusions and applicable taxes. The latest LIMS quotation should therefore be checked before sending samples.

How Long Does BIS Certification Take?

The timeline depends on:

• Factory preparedness
• Product scope
• Number of grades and sizes
• Testing availability
• Documentation readiness
• Sample conformity
• Inspection scheduling
• Resolution of any BIS observations
• Application processing

A manufacturer can reduce avoidable delays by preparing the factory, testing equipment, technical documents and product scope before filing the application.

Common Reasons for BIS Certification Delays

Incorrect Grouping

The manufacturer may select a scope without considering the applicable shape, grade and size grouping.

Incorrect Sample

A representative sample may not adequately establish the requested licence scope.

Load-Test Failure

Failure during performance testing can result in corrective action and additional testing.

Dimensional Non-Conformity

Dimensions outside the standard requirements can lead to test failure or restricted scope.

Material Issues

Non-conforming cast iron material can affect certification.

Missing Calibration

Testing equipment without valid calibration documentation can create compliance problems.

Incomplete Quality Records

Poorly maintained production and testing records can create difficulties during assessment.

Factory Readiness Problems

Insufficient equipment or unsuitable testing arrangements can delay the application.

Who Needs BIS Certification for IS 1726:1991?

BIS certification is particularly relevant to manufacturers of:

• Cast iron manhole covers
• Cast iron manhole frames
• Municipal manhole covers
• Sewerage manhole covers
• Drainage manhole covers
• Infrastructure project manhole covers
• Heavy-duty cast iron manhole products
• Extra-heavy-duty manhole products

Government departments, infrastructure contractors, municipal suppliers and institutional buyers may also specify products conforming to the applicable BIS requirements.

Benefits of BIS Certification

Regulatory Compliance

For products covered by the applicable QCO, BIS certification is an important legal compliance requirement.

Quality Assurance

The manufacturer operates under defined product requirements and quality controls.

Buyer Confidence

BIS-certified products provide greater confidence to institutional and infrastructure buyers.

Government & Institutional Opportunities

Certification can support procurement where BIS compliance is specified.

Consistent Manufacturing

Production, testing and inspection controls help maintain consistency.

Reduced Product Risk

Compliance with prescribed material, performance and dimensional requirements helps reduce quality-related issues.

BIS Certification Consultancy for Manhole Cover Manufacturers

Qualitance India provides complete consultancy support for manufacturers applying for BIS certification for Cast Iron Manhole Covers & Frames as per IS 1726:1991.

Our services include:

Product & Standard Identification

We review your product and confirm the applicable Indian Standard and certification requirements.

Grade and Scope Assessment

We review Light-Duty, Medium-Duty, Heavy-Duty and Extra-Heavy-Duty products along with applicable shapes and sizes.

Grouping Guidance

We assist in identifying suitable representative samples and proposed licence scope based on BIS grouping provisions.

Documentation Support

We help prepare and organize the documents required for the certification application.

Testing Coordination

We coordinate product testing and sample preparation according to the applicable requirements.

Factory Inspection Preparation

We review manufacturing machinery, testing facilities, calibration and quality-control systems.

BIS Application Filing

We provide support for preparing and submitting the BIS application and associated documents.

Query and Compliance Support

We assist in coordinating responses to technical or documentary observations.

BIS Licence Processing

We support the certification process through the applicable approval stage.

Post-Licence Compliance

We also support applicable renewal, scope and ongoing compliance requirements.

Quick BIS Certification Checklist

Before applying for BIS certification for cast iron manhole covers, ensure that:

☑ IS 1726:1991 applicability is confirmed
☑ Product grade is identified
☑ Shape and size are finalized
☑ Grouping requirements are understood
☑ Cast iron raw material conforms
☑ Manufacturing facilities are available
☑ Required testing equipment is available
☑ Calibration records are valid
☑ Load-testing facility is arranged
☑ Product drawings/specifications are available
☑ Quality-control records are maintained
☑ Representative samples are ready
☑ Product testing is completed successfully
☑ BIS application documents are prepared
☑ Factory is ready for inspection
☑ Standard Mark arrangements are established

Frequently Asked Questions

1. What is IS 1726:1991?

IS 1726:1991 is the Indian Standard for Cast Iron Manhole Covers and Frames.

2. Is BIS certification mandatory for cast iron manhole covers?

IS 1726:1991 is covered under the Cast Iron Products (Quality Control) Order, 2024, which requires the specified products to conform to the Indian Standard and bear the Standard Mark under a BIS licence, subject to applicable exemptions.

3. Which BIS scheme applies to IS 1726:1991?

The BIS Product Manual identifies certification under Scheme-I.

4. What is the sample size?

The Product Manual specifies one set of manhole cover and frame.

5. What grades are covered?

The main grades are Light-Duty LD-2.5, Medium-Duty MD-10, Heavy-Duty HD-20 and Extra-Heavy-Duty EHD-35.

6. What shapes are covered?

The grouping provisions include circular, lamphole, square, rectangular and rectangular scrapper-manhole configurations.

7. Is grouping available under IS 1726:1991?

Yes. The Product Manual contains specific grouping guidelines.

8. Can one test sample cover multiple sizes?

Under the grouping rules, a suitably selected highest grade/highest-size sample can cover defined lower sizes and grade designations within the applicable shape grouping.

9. Can HD-20 circular testing cover lamphole products?

The Product Manual states that testing a circular sample of HD-20 may also cover the lamphole shape in the licence scope.

10. What is the main performance test?

The important performance requirement is the load test under the applicable provisions of IS 1726:1991.

11. How frequently is the load test required?

The BIS inspection plan specifies one sample per 50 or part thereof for each grade, type/shape and size manufactured.

12. Is minimum weight checked?

Yes. The inspection plan specifies checking of each cover and frame.

13. Are dimensions tested?

Yes. Dimensional and tolerance checks are part of the certification requirements.

14. Is coating tested?

Yes, where applicable. The Product Manual includes coating control on a weekly frequency in the inspection plan.

15. What raw material is specified?

The Product Manual identifies cast iron under Clause 4.1 of IS 1726:1991, with material control linked to the applicable requirements of IS 210:2009.

16. What testing equipment is required?

Important equipment includes a universal testing machine, hardness-testing facility, vernier caliper, micrometer, weighing balance and hydraulic load-test apparatus, among other facilities.

17. Is a load-testing machine required?

A hydraulic load-test apparatus with load gauge, bearing block and stopwatch is identified in the Product Manual.

18. Is a laboratory required?

The manufacturer is required to maintain a suitably equipped and staffed laboratory for the applicable tests.

19. Are calibration records required?

Yes. The manufacturer must prepare a calibration plan for the test equipment and maintain test records.

20. Does the BIS licence automatically cover every size?

No. The licence scope is based on the approved product varieties and grouping requirements and can be restricted according to the manufacturer’s manufacturing and testing capability.

21. Can custom designs be manufactured?

The Product Manual notes that for designs other than those shown in the specified figures, dimensions may be mutually agreed between the manufacturer and purchaser, subject to the applicable requirements.

22. Is marking with the BIS Standard Mark required?

Yes. Production conforming to the Indian Standard and covered by the BIS licence should be marked with the Standard Mark.

23. Does every manufacturer have to maintain testing records?

Yes. Test records must be maintained to establish conformity.

24. Can the scope be restricted to only one grade?

Yes. The manufacturer declares the desired varieties and the final scope may be restricted according to manufacturing and testing capabilities.

25. Can a manufacturer apply for multiple grades?

Yes, subject to the applicable grouping, testing and manufacturing capability.

26. What is the current QCO for this product?

The current BIS Scheme-I listing references the Cast Iron Products (Quality Control) Order, 2024 for IS 1726:1991.

27. What was the implementation date under the 2024 QCO?

The general implementation date was 1 September 2024, followed by 1 December 2024 for small enterprises and 1 March 2025 for micro enterprises.

28. Are there exemptions under the QCO?

Yes. The QCO provides specified exemptions, including certain export manufacturing and qualifying micro/small enterprises meeting the stated investment and turnover conditions, along with certain R&D imports.

29. What are the current testing charges?

Current BIS LIMS listings show different prices depending on scope, including displayed entries around ₹7,500, ₹7,600 and ₹11,000 excluding taxes.

30. Can Qualitance India help with BIS certification for manhole covers?

Yes. Qualitance India provides product assessment, grouping guidance, documentation, testing coordination, application support, factory inspection preparation, licence processing and post-licence compliance support.

Related BIS Certification Services

Qualitance India also provides consultancy for:

• BIS Certification
• ISI Mark Certification
• BIS Scheme-I Certification
• Cast Iron Product Certification
• BIS Licence Renewal
• BIS Scope Extension
• Product Testing Coordination
• BIS Documentation
• Factory Inspection Assistance
• Quality Control Order Applicability
• Product Grouping Guidance
• Technical Compliance Support
• BIS Licence Processing

Related Products

You may also explore BIS certification requirements for:

• Cast Iron Drainage Pipes
• Cast Iron Pipe Fittings
• Malleable Cast Iron Pipe Fittings
• Grey Iron Castings
• Cast Iron Sluice Gates
• Cast Iron Manhole Covers
• Cast Iron Frames
• Ductile Iron Products

Contact Qualitance India

Qualitance India – Your Certification & Compliance Partner

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

For BIS Certification of Cast Iron Manhole Covers & Frames as per IS 1726:1991, Qualitance India provides complete support from product identification and grouping to testing, documentation, factory inspection preparation, BIS application, licence processing and post-licence compliance.

Conclusion

Cast iron manhole covers and frames play an important role in drainage, sewerage, utility and infrastructure systems. Because these products are subjected to mechanical loads and must maintain proper fit, dimensions and durability, conformity with the applicable Indian Standard is essential.

IS 1726:1991 provides requirements covering material, manufacture, workmanship, load-bearing performance, minimum weight, dimensions, coating and other product controls. The applicable BIS Product Manual provides Scheme-I certification procedures, grouping provisions and inspection and testing requirements.

For manufacturers covered by the Cast Iron Products (Quality Control) Order, 2024, BIS certification and the Standard Mark are mandatory subject to applicable exemptions.

With Qualitance India, manufacturers can manage the complete BIS certification journey with professional support for product scope, sample selection, testing, documentation, factory preparation, application processing and ongoing compliance.

Need BIS Certification for Cast Iron Manhole Covers & Frames? Contact Qualitance India for complete BIS licence and compliance support.

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