What are the main types of fittings covered by this standard?

The standard covers couplers, reducers, tees, bends, end caps, and pump adaptors for both solvent cement and elastomeric ring joints (Clause 4).

What is the purpose of the opacity test?

The fitting wall must not transmit more than 0.2% of visible light to prevent the growth of algae and microorganisms inside the pipeline (Clause 6.3).

How are the fittings designated or classified?

Fittings are designated by the pressure class of the pipe they are intended to be used with, for example, a fitting for a Class 3, 6 kgf/cm² pipe (Clause 5).

What material is specified for the fittings?

The fittings shall be made from virgin UPVC compound conforming to the designation IS 10124: Part 1 (Clause 3.1).

IS 13593

: 1992

UPVC pipe fittings to be used with the UPVC pipes in the suction and delivery lines of agricultural pumps

CurrentSpecializedSpecificationMEP · Plastic Piping System

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This standard specifies the requirements for unplasticized PVC (UPVC) fittings intended for use in the suction and delivery lines of agricultural pump sets. It covers material requirements, dimensions, performance tests (like reversion and opacity), and marking criteria for various fittings such as couplers, bends, and tees.

UPVC pipe fittings to be used with the UPVC pipes in the suction and delivery lines of agricultural pumps

Quick Reference Values

Vicat softening temperatureMinimum 79 °C

Opacity of fitting wallShall not transmit more than 0.2 percent of visible light

Reversion test temperature150 ± 2 °C

Maximum reversion percentage5 percent

Density of UPVC material1.40 to 1.46 g/cm³ at 27°C

Practical Notes

Ensure that the pressure class of the fittings matches the pressure class of the UPVC pipes being used.

Proper jointing using solvent cement (as per IS 7834) is crucial for creating a durable, leak-proof system.

These fittings are specifically designed for agricultural water lines and should not be used for potable water supply unless they also comply with IS 4985 requirements.