IS 1536:2001 is the Indian Standard (BIS) for ductile iron pipes for water and sewage. This standard specifies the requirements for centrifugally cast (spun) iron pressure pipes used for water, gas, and sewage transmission. It defines the dimensional standards, weight classes (LA, A, B), mechanical properties, and hydrostatic testing procedures to ensure pipeline integrity under pressure.
Specifies requirements for centrifugally cast ductile iron pipes, with or without lining/coating, for water and sewage applications.
Overview
- Status
- Current
- Usage level
- Frequently Used
- Domain
- Water Resources — Drainage, Sewerage and Sanitary Fittings
- Type
- Specification
- Amendments
- Amendment 1 (2007)
Also on InfraLens for IS 1536
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! Always specify the correct pipe class (LA, A, or B) based on the calculated working and surge pressures of the network.
! Class LA is generally used for gravity lines and low-pressure transmission, while Classes A and B are for higher pressures.
! Ensure the internal lining and external coatings are preserved during transportation and lowering into trenches to prevent premature corrosion.
Frequently referenced clauses
Updates & Amendments1 amendment
Consolidated list per BIS. For the text of each amendment, refer to the BIS portal link above.
cast ironductile ironmetals
International Equivalents
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International Comparison — Coming Soon
We're adding equivalent international standards for this code.
Key Values4
Quick Reference Values
nominal diameter range80 mm to 1000 mm
minimum tensile strength200 MPa
maximum brinell hardness230 HB
standard working lengths3m, 4m, 5m, 5.5m
Tables & Referenced Sections
Key Tables
Table 1 - Dimensions and Mass of Socket and Spigot Pipes
Table 2 - Tolerances on External Diameter and Thickness
Table 3 - Hydrostatic Test Pressures at Works
Key Clauses
Clause 4 - Classification of Pipes (Class LA, A, B)
Clause 6 - Dimensions and Tolerances
Clause 9 - Mechanical Tests
Clause 10 - Hydrostatic Tests
Clause 13 - Coating and Lining
Frequently Asked Questions3
What are the different classes of pipes specified in IS 1536?+
The standard classifies pipes into Class LA, Class A, and Class B based on their increasing wall thickness and pressure handling capacity.
What is the minimum tensile strength required for these spun iron pipes?+
The minimum tensile strength required is 200 MPa as per the mechanical testing requirements.
What code should be used for laying these pipes?+
IS 3114 is the code of practice for laying cast iron/spun iron pipes.
QA/QC Inspection Templates
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QA/QC templates coming soon for this code.