What are the common stiffness classes for GRP pipes under this code?

Common nominal stiffness (SN) classes are 2500, 5000, and 10000 N/m² (Clause 5.4).

Can IS 14402 pipes be used for drinking water?

No, the title explicitly states 'other than potable'. For potable water applications, refer to IS 12709.

What types of joints are covered by this standard?

The standard covers various joint types including spigot and socket with elastomeric rings, butt and wrap lamination, and flanged joints (Clause 6).

What is the Barcol hardness test used for?

It is used to determine the degree of cure of the resin in the finished GRP product, ensuring it meets strength and durability requirements (Clause 8.6).

IS 14402

: 1996

GRP pipes joints and fittings for use in sewerage, industrial waste and water (other than potable)

CurrentSpecializedSpecificationBIMWater Resources · Plastic Piping System

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This standard specifies the requirements for Glass Reinforced Plastic (GRP) pipes, joints, and fittings intended for conveying sewerage, industrial waste, and non-potable water. It covers materials, manufacturing processes, dimensions, physical and mechanical properties, performance requirements, and testing methods.

GRP pipes joints and fittings for use in sewerage, industrial waste and water (other than potable)

Quick Reference Values

Standard Nominal Stiffness (SN)2500, 5000, 10000 N/m²

Standard Nominal Pressure (PN)Up to 32 bar (3.2 MPa)

Standard Nominal Diameters (DN)100 mm to 2000 mm

Minimum Barcol Hardness90 percent of the value specified by the manufacturer

Long-term Hydrostatic Strength Test Duration10000 hours

Acetone Test RequirementNo separation of inner surface shall be visible to the naked eye

Practical Notes

This code is not applicable for potable (drinking) water applications; refer to IS 12709 for that purpose.

Pay close attention to handling and installation procedures to prevent damage like delamination or cracking, which can compromise long-term performance.

GRP pipe properties are highly dependent on the manufacturing process (e.g., filament winding, centrifugal casting); verify the process and corresponding test certificates from the manufacturer.