This standard specifies the requirements for polyethylene (PE) electrofusion fittings, such as couplers and saddles, used for joining PE pipes in gaseous fuel supply networks. It covers material properties (PE 80, PE 100), dimensional standards, and performance criteria for the fittings and the final welded assembly.
Polyethene Fittings for use with Polyethylene Pipes for the Supply of Gaseous Fuels, Part 3: Electro Fusion Fittings
Quick Reference Values
Minimum Required Strength (MRS) for PE 10010.0 MPa
Minimum Required Strength (MRS) for PE 808.0 MPa
Hydrostatic Strength Test Stress (PE 100, 20°C, 100h)12.4 MPa
Melt Flow Rate (MFR) Deviation±20% of base resin
Applicable Standard Dimension Ratios (SDR)SDR 11 and SDR 17.6
Key Formulas
P = (20 * MRS) / (C * (SDR - 1)) — Pipe Pressure Rating Formula (from pipe standard, context for fitting usage)
Practical Notes
This standard is technically withdrawn and has been superseded by IS 16738 (Part 3):2018, which should be consulted for new projects.
Proper surface preparation, including scraping the pipe surface to remove the oxidized layer, is absolutely critical for achieving a reliable electrofusion joint.
Fusion parameters (time, voltage) are specific to the fitting manufacturer and size; always use the parameters provided with the fitting, typically via a barcode scanned by the electrofusion controller.