The standard delineates specifications and testing protocols for unplasticized polyvinyl chloride (UPVC) single wall corrugated pipes intended mainly for drainage uses. It includes guidelines for both perforated and solid pipes suited for surface and subsurface drainage in agricultural, roadway, sports, and construction environments, ensuring compliance with Indian climatic and soil conditions through material quality, dimensional precision, mechanical robustness, and chemical resistance.
Overview
The standard delineates specifications and testing protocols for unplasticized polyvinyl chloride (UPVC) single wall corrugated pipes intended mainly for drainage uses. It includes guidelines for both perforated and solid pipes suited for surface and subsurface drainage in agricultural, roadway, sports, and construction environments, ensuring compliance with Indian climatic and soil conditions through material quality, dimensional precision, mechanical robustness, and chemical resistance.
Audience
Contents
Structure
This section defines the extent and key specifications of UPVC single wall corrugated pipes used for drainage, including terminology and intended uses such as agricultural and highway drainage systems.
Lists related standards and references essential for pipe stiffness testing, elongation weight tables, and bend testing protocols.
Clarifies definitions related to pipe stiffness, deflection, perforation characteristics, and other technical terms used throughout the standard.
Details acceptable base resin quality, additive restrictions, allowance for reprocessed materials, and dimensional tolerances.
Describes various plastic pipe categories including LDPE, HDPE, UPVC, and their respective applications in water supply, drainage, and cable ducting.
Summarizes measurement methods, tolerances for outside and inside diameters, perforation sizing, and corrugation height.
Outlines testing procedures and minimum requirements for pipe stiffness, impact strength, elongation, and bending resistance.
Defines sampling sizes based on lot length, sequential testing order for visual, dimensional, and physical properties, and acceptance/rejection criteria.
Specifies mandatory markings on pipes/coils including manufacturer ID, dimensions, perforation status, batch number, and use of BIS Standard Mark.
Describes specimen preparation, conditioning, loading procedures, and calculation of stiffness at specified deflections.
Details conditioning, impact test setup with weight drop, specimen orientation, and acceptance criteria for fracture resistance at 0°C.
Explains specimen size, conditioning, weights to be applied, gauge length, elongation calculation, and timing for testing.
Specifies specimen dimensions, mandrel radius, conditioning, bending operation, and criteria for evaluating pipe integrity.
Provides instructions on cutting, conditioning, marking gauge length, load application, and timing for test specimens.
Frequently Asked
Pipes must primarily be made from unplasticized polyvinyl chloride (UPVC) adhering to IS 10151 specifications. Only additives essential for facilitating manufacture, enhancing surface quality, and ensuring mechanical strength are permitted. These additives must not pose any toxic hazards or negatively impact the pipe's chemical or physical properties. The use of reprocessed material from the manufacturer's own production waste is allowed up to a maximum of 10%. This ensures the pipes are safe, durable, and suitable for drainage applications.
Dimensional tolerances vary by nominal outside diameter as outlined in Clause 7 and Table 1 of the standard. For smaller diameters like 80 mm, a tolerance of +5 mm is allowed, while for 100 mm pipes, ±5 mm applies. Larger diameters such as 160 and 200 mm have tolerances of +5 mm and -10 mm. For the biggest sizes like 355 and 455 mm, a tolerance of ±10 mm is permitted. Inside diameters are calculated by subtracting twice the average wall thickness from the nominal outside diameter and are measured using a bore gauge to maintain consistency.
Perforations must be positioned in the valleys of the corrugations with their longer dimension oriented along the pipe's circumference. A maximum of eight rows of perforations are allowed. The minimum water inlet area per meter of pipe length is dependent on nominal diameter, requiring at least 18 cm²/m for 80 mm pipes and 21 cm²/m for 100 mm and larger diameters. Perforation dimensions are restricted to a maximum width of 2 mm for pipes up to 100 mm and 3 mm for larger diameters, with length limits of 15 mm and 32 mm respectively. Punching as a method of perforation is prohibited to maintain structural integrity.
Mechanical testing includes pipe stiffness assessments and impact resistance evaluations. Stiffness tests require specimens equal in length to the nominal outside diameter (minimum 305 ±3 mm), conditioned at 23 ±2°C for one hour, and loaded to measure deflections at 5% and 10%. Impact resistance testing involves conditioning specimens for 24 hours at 10°C, then impacting them with a 2.5 kg weight dropped from 0.55 meters on the pipe’s vertical top diameter. Of ten specimens tested, at least nine must show no fractures or cracks, ensuring compliance with IS 9271 requirements.
The standard mandates that pipe materials must resist degradation from chemicals commonly found in Indian soil and groundwater, ensuring longevity and durability. Additionally, due to intense sunlight exposure, pipes must contain ultraviolet (UV) stabilizers within their compound composition to prevent deterioration caused by UV radiation. These requirements are incorporated to guarantee that UPVC and other plastic pipes maintain their mechanical and physical integrity under harsh environmental conditions prevalent in India.
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