This specification covers the requirements for polyethylene (PE) fittings intended for socket fusion joining with PE pipes used for the supply of gaseous fuels. It details the material properties, geometrical characteristics, mechanical performance, physical properties, and marking requirements for fittings like couplers, elbows, and tees.
Polyethene Fittings for use with Polyethylene Pipes for the Supply of Gaseous Fuels - Specification, Part 1: Fittings for Socket Fusion using Heated Tools
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This standard is technically withdrawn and has been superseded by IS 16738 (Part 3):2018, which should be consulted for new projects.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.