Similar International Standards
ISO 160:1993ISO (International Organization for Standardization)
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Asbestos-cement pressure pipes and joints
Directly covers asbestos-cement pipes and joints for conveying liquids under pressure, same as the IS code.
ASTM C296 / C296M - 00ASTM International (American Society for Testing and Materials), USA
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Standard Specification for Asbestos-Cement Pressure Pipe
Covers asbestos-cement pressure pipe for public and private water distribution systems, matching the IS code's scope.
BS 486:1981BSI (British Standards Institution), UK
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Specification for asbestos-cement pressure pipes and joints
Historically equivalent, specified AC pressure pipes before being withdrawn in favor of non-asbestos materials.
SANS 819:2003SABS (South African Bureau of Standards), South Africa
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Asbestos-cement pressure pipes
A contemporary national standard from the same era, covering the same product type and application.
Key Differences
≠Pressure Classification: IS 1592 uses Classes 5, 10, 15, 20, 25 based on maximum static working pressure in kgf/cm². In contrast, ASTM C296 uses Classes 100, 150, 200 based on pressure rating in psi.
≠Hydraulic Proof Pressure Test: IS 1592 requires a works proof test at twice the class pressure (e.g., 20 kgf/cm² for Class 10 pipe). ASTM C296 specified a more stringent test at four times the class pressure (e.g., 600 psi for Class 150 pipe).
≠Standard Pipe Lengths: IS 1592 specifies standard lengths of 4.0 m or 5.0 m. US standards like ASTM C296 specified lengths in imperial units, typically 13 ft (3.96 m), which is a common but different standard.
≠Dimensional Tolerances: While all standards specify tolerances for diameter, length, and straightness, the specific permissible values differ. For example, tolerances on internal diameter for a given nominal size can vary between IS 1592 and ISO 160.
Key Similarities
≈Material Composition: All standards are fundamentally based on a composite material made from a binder of Portland cement (or a similar hydraulic cement) reinforced with asbestos fibres (typically chrysotile).
≈Mandatory Performance Tests: All equivalent standards mandate a core set of mechanical and hydraulic tests, including a hydraulic proof pressure test for leak-tightness, a crushing test for external load resistance, and a bursting strength test for ultimate pressure capacity.
≈Jointing System: The primary method for joining pipes specified or allowed in these standards is a flexible joint using a separate coupling and elastomeric sealing rings (rubber rings), ensuring a watertight seal that allows for some angular deflection.
≈Application Scope: The primary intended application across all these standards is the conveyance of water under pressure, particularly for water mains and distribution networks.