Similar International Standards
AWWA C303-22American Water Works Association, USA
HighCurrent
Concrete Pressure Pipe, Bar-Wrapped, Steel-Cylinder Type
Directly covers bar-wrapped steel cylinder pipes, a primary type within IS 15155.
AWWA C301-20American Water Works Association, USA
HighCurrent
Prestressed Concrete Pressure Pipe, Steel-Cylinder Type
Covers both bar-wrapped and wire-wrapped steel cylinder pipes, encompassing the full scope of IS 15155.
ISO 22699:2011International Organization for Standardization, International
HighCurrent
Prestressed concrete pressure pipes with a steel cylinder
Provides international guidelines for the same type of prestressed steel cylinder pipes.
AWWA C300-16American Water Works Association, USA
MediumCurrent
Reinforced Concrete Pressure Pipe, Steel-Cylinder Type
Covers steel cylinder pipes, but with mild steel cage reinforcement instead of high-tensile prestressing wire/bar.
Key Differences
≠IS 15155 specifies design calculations within its annexes, while AWWA standards have their own distinct design equations and safety factors which may lead to different required steel thicknesses and wrapping for the same design pressure.
≠IS 15155 explicitly allows for a range of Indian cements, including Ordinary Portland Cement (OPC), Portland Pozzolana Cement (PPC), and Portland Slag Cement (PSC). AWWA standards typically reference ASTM cement types (e.g., Type I, II, V), which have different chemical compositions and performance criteria.
≠The hydrostatic factory test pressure in IS 15155 is limited to not induce a stress exceeding 75% of the steel cylinder's yield strength, whereas AWWA C301 allows this stress to go up to 90%, indicating a different testing philosophy.
≠IS 15155 requires a minimum mortar coating thickness of 20 mm over the prestressing steel, while the equivalent AWWA C303 standard requires a minimum of 19 mm (3/4 inch).
Key Similarities
≈All standards are based on the same composite pipe construction principle: a watertight steel cylinder, mortar lining, high-tensile prestressing reinforcement (wire or bar), and an external protective mortar coating.
≈Both IS 15155 and its AWWA counterparts mandate 100% hydrostatic proof testing of every pipe section at the manufacturing facility to ensure structural integrity and water tightness before dispatch.
≈The typical joint design is similar across standards, involving steel bell and spigot rings welded to the ends of the steel cylinder, designed to be sealed with a rubber gasket to create a flexible, watertight joint.
≈All standards provide comprehensive specifications for the constituent materials, including minimum strength and chemical properties for steel cylinders, prestressing wire/bar, cement, and aggregates for the mortar.