IS 14930 Part 1 : 2001Gaskets for use with ASB, CI & DI pipes for water, gas and sewage - Part 1: Elastomeric sealing gaskets (EPDM, NBR) - Specification
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IS 14930:2001 Part 1 is the Indian Standard (BIS) for gaskets for use with asb, ci & di pipes for water, gas and sewage - part 1: elastomeric sealing gaskets (epdm, nbr) - specification. This standard specifies the material, physical property requirements, and testing methods for elastomeric sealing gaskets made from EPDM and NBR. These gaskets are intended for use in the joints of Asbestos Cement (ASB), Cast Iron (CI), and Ductile Iron (DI) pipes carrying water, gas, or sewage.
Specifies requirements for elastomeric sealing gaskets used in joints of asbestos cement, cast iron, and ductile iron pipes.
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! Ensure the correct gasket material is used: EPDM for water/sewage applications and NBR for gas/oil applications due to its required resistance.
! A visual inspection for defects like cracks, blisters, or foreign matter is a mandatory first check before installation, as per Clause 6.
! Always request and verify the Manufacturer's Test Certificate (MTC) to ensure the supplied gaskets comply with the physical requirements listed in Table 1.
EN 681-1:2019CEN (European Committee for Standardization), Europe
HighCurrent
Elastomeric seals - Material requirements for pipe joint seals used in water and drainage applications - Part 1: Vulcanized rubber
Specifies material requirements for vulcanized rubber seals for water supply and drainage, directly aligning with IS 14930's water/sewage scope.
ISO 4633:2015ISO (International Organization for Standardization), International
HighCurrent
Rubber seals — Joint rings for water supply, drainage and sewerage pipelines — Specification for materials
Provides international material specifications for rubber joint rings in water/sewerage pipelines, a direct counterpart to the IS code's scope.
ASTM F477-20ASTM International, USA
MediumCurrent
Standard Specification for Elastomeric Seals (Gaskets) for Joining Plastic Pipe
Covers elastomeric seal materials but is focused on plastic pipe, whereas IS 14930 includes CI and DI pipes.
AS 1646:2015Standards Australia, Australia
HighCurrent
Elastomeric seals for waterworks, sewerage and drainage purposes
Australian standard for elastomeric seals in water and sewage applications, largely harmonized with ISO 4633.
Key Differences
≠The requirements for 'Effect on Water Quality' in EN 681-1 are more extensive and specific, referencing tests for microbial growth (EN 16421), which are not explicitly detailed to the same level in IS 14930.
≠While IS 14930's title includes 'gas', its material specifications are less detailed for this application compared to dedicated European standards like EN 682 ('Elastomeric seals for gas and hydrocarbon fluids'), which NBR gaskets for gas service would typically need to meet in Europe.
≠Stress relaxation test criteria differ; IS 14930 specifies a maximum relaxation of 16% after 3 days at 23°C, while EN 681-1 requires a maximum of 13% after a longer period of 7 days at 23°C, indicating a stricter long-term performance requirement in the EN standard.
≠EN 681-1 and ISO 4633 have different material type classifications (e.g., WA, WC, WG in EN 681-1 for different cold temperature performance), which are not present in IS 14930.
Key Similarities
≈All standards specify requirements for common vulcanized rubber materials used for sealing, including EPDM for water/sewage and NBR for applications requiring oil/gas resistance.
≈The core set of physical property tests is consistent across the standards, including Hardness, Tensile Strength, Elongation at Break, and Compression Set, forming the basis of material qualification.
≈The test conditions and acceptance criteria for Ozone Resistance (typically 50 pphm, 40°C, 48h, 20% strain with no cracking) are virtually identical between IS 14930-1 and EN 681-1.
≈All standards use a similar system for classifying gaskets by nominal hardness (e.g., 40, 50, 60 IRHD/Shore A) with an allowable tolerance of ±5 points.
Parameter Comparison
Parameter
IS Value
International
Source
Hardness (Tolerance)
Nominal value ±5 IRHD
Nominal value ±5 IRHD
EN 681-1:2019
Tensile Strength (min, EPDM, 50 IRHD)
9.0 MPa
9.0 MPa
EN 681-1:2019
Elongation at Break (min, EPDM, 50 IRHD)
350%
375%
EN 681-1:2019
Compression Set (max, 24h @ 70°C)
15% (for 22h @ 70°C)
15%
EN 681-1:2019
Stress Relaxation (max, 23°C)
16% (after 3 days)
13% (after 7 days)
EN 681-1:2019
Volume Change in Water (max, 7d @ 70°C)
0 to +8%
0 to +8%
EN 681-1:2019
Heat Ageing (7d @ 70°C, Change in Elongation, max)
-30%
-30% (for EPDM)
EN 681-1:2019
⚠ Verify details from original standards before use
Key Values6
Quick Reference Values
Hardness (Nominal for EPDM/NBR)Specified value ± 5 IRHD
Minimum Tensile Strength (EPDM)10 MPa
Minimum Elongation at Break (EPDM)350 %
Maximum Compression Set (EPDM, 22h @ 70°C)20 %
Maximum Water Absorption (EPDM, 7 days @ 70°C)10 % by mass
Maximum Volume Change in Oil (NBR, 72h @ 100°C)+15 %
Tables & Referenced Sections
Key Tables
Table 1 - Physical Requirements for Elastomeric Sealing Gaskets
Table 2 - Requirements for Resistance to Oil for NBR Gaskets
Table 3 - Requirements for Resistance to Gas Condensates for NBR Gaskets
What is the correct gasket material for a drinking water pipeline?+
EPDM (Ethylene Propylene Diene Monomer) is the specified material for water and sewage applications as per Clause 4.1.
What is the maximum allowed compression set for an EPDM gasket?+
The maximum compression set is 20% when tested for 22 hours at 70°C, as per Table 1.
Can an EPDM gasket be used for a natural gas pipe?+
No. NBR (Nitrile Butadiene Rubber) gaskets must be used for gas applications due to their resistance to oils and gas condensates, as specified in Clause 4.2 and Tables 2 & 3.
What is the typical hardness requirement for these gaskets?+
The hardness must be within ±5 IRHD of a nominal value (e.g., 50, 60, or 70) specified by the purchaser, according to Table 1.