What are the different types of PP pipes specified in this code?

The code specifies three types: PP-H (Homopolymer), PP-B (Block Copolymer), and PP-R (Random Copolymer) (Clause 4.1).

What is the maximum allowed change in length (reversion) for PP pipes when heated?

The longitudinal reversion shall not be more than 2 percent when tested as per the method in Annex B (Table 3).

Is there a standard color for these pipes?

No, the color of the pipes shall be as agreed to between the purchaser and the manufacturer (Clause 5.4).

How are these pipes classified for pressure rating?

Pipes are classified by pressure rating (e.g., PN 10, PN 16, PN 20) which corresponds to a specific Standard Dimension Ratio (SDR) and material type (Table 1).

IS 15307

: 2003

Polypropylene (PP) pipes for hot and cold water supplies - Specification

CurrentFrequently UsedSpecificationBIMMEP · Water Supply and Plumbing

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This standard specifies the requirements for Polypropylene (PP) pipes intended for hot and cold water supplies. It covers material characteristics for three types of PP (PP-H, PP-B, PP-R), pipe dimensions based on pressure classes, physical and performance requirements like pressure resistance and thermal stability, and marking guidelines for product identification.

Specifies requirements for polypropylene pipes used for hot and cold water distribution systems within buildings.

Quick Reference Values

Maximum Longitudinal Reversion2 percent (at 135°C)

Standard Dimension Ratios (SDR) specifiedSDR 11, SDR 9, SDR 7.4, SDR 6

Melt Flow Rate (MFR) for PP-R at 230°C/2.16kg≤ 0.5 g/10 min

Hydrostatic Pressure Test requirement for PP-R at 95°C for 1000h3.5 MPa induced stress

Opacity RequirementShall not transmit more than 0.2 percent of visible light

Practical Notes

PP-R (Polypropylene Random Copolymer) is the most commonly used type for residential hot and cold water plumbing due to its superior temperature resistance.

Ensure pipes and fittings are from the same manufacturer and material type to guarantee compatibility and effective socket fusion jointing.

Always check for the ISI mark and the full marking as per Clause 10 on each pipe, which includes manufacturer, size, pressure rating, and material type.