What material should be used for these fittings?

Polyethylene compound conforming to IS 7328, containing 2-3% well-dispersed carbon black for UV stability (Clause 4).

What is the pressure test requirement for these fittings?

For type testing, fittings must withstand an internal hydraulic pressure of 3.5 times the nominal pressure (PN) at 27°C for 1 hour without bursting (Table 4).

Is this standard still current?

No, IS 6530:1996 has been withdrawn and superseded by the IS 8008 series for injection-moulded fittings and the IS 8360 series for fabricated fittings.

What are the dimensional requirements based on?

Dimensions for butt fusion fittings are given in Table 1, and for socket fusion fittings in Table 2, ensuring compatibility with PE pipes as per IS 4984.

IS 6530

: 1996

Polyethylene fittings for water supply - Specification

CurrentSpecializedSpecificationBIMMEP · Water Supply and Plumbing

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This standard specifies the requirements for polyethylene (PE) fittings for use with polyethylene pipes in potable water supply systems. It covers aspects such as material composition, dimensions for butt fusion and socket fusion fittings, performance criteria like pressure resistance and reversion, and marking guidelines.

Specifies requirements for polyethylene fittings used in conjunction with polyethylene pipes for water supply.

Quick Reference Values

Carbon black content2.0 to 3.0 percent by mass

Dispersion of carbon blackGrade 1, 2, or 3

Longitudinal Reversion at 110 °C (max)3 percent

Hydrostatic pressure test (Type Test)3.5 x Pn for 1 hour at 27°C

Melt Flow Rate (MFR) deviation from base polymer±20 percent

Practical Notes

This standard has been superseded by IS 8008 (for injection-moulded fittings) and IS 8360 (for fabricated fittings); refer to them for current projects.

Ensure the pressure rating (PN class) and material grade of the fitting match the connecting pipe to ensure system integrity.

The quality of the joint is critical. Proper fusion procedures (butt, socket, or electrofusion) as per relevant codes like IS 7634 are essential for a leak-proof network.