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IS 8360:2000 (Part 1) is the Indian Standard (BIS) for fabricated high-density polyethene (hdpe) fittings for potable water supplies, part 1: general requirements. This standard (Part 3) specifies the requirements for fabricated 90-degree bends made from High-Density Polyethylene (HDPE), intended for potable water supply pipelines. It covers materials, dimensions, performance tests like hydrostatic pressure resistance, and marking criteria for fittings ranging from 63 mm to 1000 mm nominal diameter.
fabricated high-density polyethene (HDPE) fittings for potable water supplies, Part 1: General requirements
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! This standard is for 'fabricated' bends, which are made by cutting and butt-welding straight pipe sections, not 'moulded' bends.
! Ensure the base pipe used for fabrication conforms to IS 4984 for the correct material grade and pressure rating.
! Verify the marking on the fitting, which should include the manufacturer, nominal size, material grade (e.g., PE 80, PE 100), and the ISI mark for compliance.
Consolidated list per BIS. For the text of each amendment, refer to the BIS portal link above.
HDPEpolyethyleneplastic
International Equivalents
Similar International Standards
ISO 4427-3:2019ISO (International Organization for Standardization), International
HighCurrent
Plastics piping systems for water supply, and for drainage and sewerage under pressure — Polyethylene (PE) — Part 3: Fittings
Covers requirements for moulded and fabricated PE fittings, forming part of a complete PE piping system.
EN 12201-3:2023CEN (European Committee for Standardization), Europe
HighCurrent
Plastics piping systems for water supply, and for drainage and sewerage under pressure - Polyethylene (PE) - Part 3: Fittings
European standard harmonized with ISO 4427, specifying requirements for PE fittings, including fabricated types.
AS/NZS 4129:2020Standards Australia / Standards New Zealand, Australia/New Zealand
HighCurrent
Fittings for polyethylene (PE) pipes for pressure applications
Specifies requirements for moulded, fabricated, and mechanical fittings for use with PE pressure pipes.
ASTM D3261-22ASTM International, USA
MediumCurrent
Standard Specification for Butt Heat Fusion Polyethylene (PE) Plastic Fittings for Polyethylene (PE) Plastic Pipe and Tubing
Focuses specifically on butt-fused fittings, a major type of fabricated fitting, but not other fabrication methods.
Key Differences
≠IS 8360:2000 includes requirements for PE 63 grade material, which is largely obsolete in modern international standards like ISO 4427-3 and EN 12201-3 that focus on PE 80 and PE 100.
≠IS 8360 is more prescriptive in its annexes, providing detailed diagrams and dimensions for fabricating mitred bends and junctions. International standards are more performance-oriented, referencing separate welding standards (e.g., ISO 21307) for fabrication methods.
≠International standards like ISO 4427-3 have more stringent requirements for fabricated bends, specifying maximum cut angles (e.g., 7.5° for PE100) that are stricter than the maximum angle between sections (22.5°) specified in IS 8360.
≠While IS 8360 relies on the hydrostatic strength test to prove fitting integrity, EN 12201-3 and ISO 4427-3 include additional performance tests for fabricated fittings, such as a tensile test for weld strength, which is not explicitly required in the IS code.
Key Similarities
≈All standards mandate that fabricated fittings must be made from pipes that conform to their respective national/international standards (e.g., IS 4984 for IS 8360, ISO 4427-2 for ISO 4427-3), ensuring base material quality.
≈There is a universal requirement across all compared standards that all materials used must be suitable for contact with potable water, not imparting any odor, taste, or toxicity.
≈All standards specify the use of finely dispersed carbon black, typically in the range of 2.0% to 2.5%, to provide UV protection for fittings intended for above-ground use or storage.
≈The fundamental performance test for fabricated fittings in both IS 8360 and its international counterparts is the long-term hydrostatic strength test (e.g., at 80°C) to ensure the integrity of the weld and the fitting body under pressure and temperature.
Parameter Comparison
Parameter
IS Value
International
Source
Material Grades Covered
PE 63, PE 80, PE 100
PE 80, PE 100
EN 12201-3:2023
Carbon Black Content
2.25 ± 0.25 % by mass
2.0 % to 2.5 % by mass
ISO 4427-3:2019
Hydrostatic Strength Test (Long Term)
165 hours at 80°C without failure
165 hours at 80°C without failure
ISO 4427-3:2019
Max. Angle Between Mitre Sections
22.5 degrees
For bends made of segments, the cut angle (α) shall be ≤ 7.5° for PE 100. (Note: this corresponds to a 15° segment angle).
EN 12201-3:2023
Longitudinal Reversion (on base pipe)
≤ 3% at 110°C
≤ 3% at 110°C
AS/NZS 4129:2020
Melt Flow Rate (MFR) Variation
Must not deviate more than ± 20% from base material.
The MFR of the fitting compound shall not deviate by more than ±25% from the MFR of the pipe compound.
AS/NZS 4129:2020
Oxidation Induction Time (OIT) @ 200°C
≥ 20 minutes (via parent pipe spec IS 4984)
≥ 20 minutes (standard OIT)
ISO 4427-3:2019
⚠ Verify details from original standards before use
Key Values6
Quick Reference Values
Hydrostatic test temperature80 °C
Hydrostatic test duration165 h
Hydrostatic test induced stress (PE 100)8.0 MPa
Wall thickness toleranceOnly positive tolerance is permitted, up to +0.1t