ISO 4437-3:2014
Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 3: Fittings

Standard No.

ISO 4437-3:2014

Release Date

2014

Published By

International Organization for Standardization (ISO)

Status

Be replaced 2024-01

Replace By

ISO 4437-3:2024

Latest

ISO 4437-3:2024

Scope

This part of ISO 4437 specifies the characteristics of fusion fittings made from polyethylene (PE) as well as of mechanical fittings for piping systems in the field of the supply of gaseous fuels. It also specifies the test parameters for the test methods referred to in this part of ISO 4437. In conjunction with ISO 4437-1, ISO 4437-2, ISO 4437-4, and ISO 4437-5, it is applicable to PE pipes, fittings and valves, their joints, and joints with components of PE and other materials intended to be used under the following conditions: a) the maximum operating pressure (MOP) is based on the design stress, determined from the compound minimum required strength (MRS) divided by the C factor, and taking into account rapid crack propagation (RCP) requirements; b) a temperature of 20 °C as reference temperature for the design basis. NOTE 1 For other operating temperatures, derating coefficients are given in ISO 4437-5:2014. NOTE 2 It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national regulations and installation practices or codes. This part of ISO 4437 is applicable for fittings of the following types: — electrofusion socket fittings; — electrofusion saddle fittings; — spigot end fittings (for butt fusion using heated tools and electrofusion socket fusion); — socket fusion fittings; — mechanical fittings. The fittings can for example be in the form of couplers, saddles, equal and reduced tees, reducers, elbows, bends, or end caps. NOTE 3 Fabricated fittings are normally not used for gas applications except for larger dimensions or in the absence of other solutions. Guidance can be found in ISO 4427-3:2007, Annex B.[2]

ISO 4437-3:2014 Referenced Document

• EN 12117:1997 Platics Piping Systems - Fittings, Valves and Ancillaries - Determination of Gaseous Flow Rate/Pressure Drop Relationships
• ISO 10838 Mechanical fittings for polyethylene piping systems for the supply of gaseous fuels - Part 3: Thermoplastics fittings for pipes of nominal outside diameter less than or equal to 63 mm
• ISO 10838-1:2000 Mechanical fittings for polyethylene piping systems for the supply of gaseous fuels - Part 1: Metal fittings for pipes of nominal outside diameter less than or equal to 63 mm
• ISO 10838-2:2000 Mechanical fittings for polyethylene piping systems for the supply of gaseous fuels - Part 2: Metal fittings for pipes of nominal outside diameter greater than 63 mm
• ISO 1133-1:2011 Plastics - Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics - Part 1: Standard method
• ISO 1167-1:2006 Thermoplastics pipes, fittings and assemblies for the conveyance of fluids - Determination of the resistance to internal pressure - Part 1: General method
• ISO 1167-4:2007 Thermoplastics pipes, fittings and assemblies for the conveyance of fluids - Determination of the resistance to internal pressure - Part 4: Preparation of assemblies
• ISO 228-1:2000 Pipe threads where pressure-tight joints are not made on the threads - Part 1: Dimensions, tolerances and designation
• ISO 3126:2005 Plastics piping systems - Plastics components - Determination of dimensions
• ISO 4437-1:2014 Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 1: General
• ISO 4437-2:2014 Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 2: Pipes
• ISO 4437-5:2014 Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 5: Fitness for purpose of the system
• ISO 7-1:1994 Pipe threads where pressure-tight joints are made on the threads - Part 1: Dimensions, tolerances and designation

ISO 4437-3:2014 history

• 2024 ISO 4437-3:2024 Plastics piping systems for the supply of gaseous fuels
• 2014 ISO 4437-3:2014 Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 3: Fittings