ISO/TC 138/SC 4
| Projekta Nr. | ISO 4437-2:2014 |
|---|---|
| Nosaukums | <p>ISO 4437-2:2014 specifies the characteristics of pipes made from polyethylene (PE) for piping systems in the field of the supply of gaseous fuels.</p> <p>It also specifies the test parameters for the test methods referred to in this International Standard.</p> <p>In conjunction with part of ISO 4437-1, ISO 4437-3, 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: the maximum operating pressure (MOP) is based on the design stress determined from the compound minimum required strength (MRS) divided by the <i>C</i> factor, and taking into account rapid crack propagation (RCP) requirements; and a temperature of 20 °C is taken as reference temperature for the design basis.</p> <p>ISO 4437-2:2014 covers three types of pipes: PE pipes (outside diameter <i>d</i><sub>n</sub>) including any identification stripes; PE pipes with co-extruded layers on either or both the outside and/or inside of the pipe (total outside diameter <i>d</i><sub>n</sub>), where all PE layers have the same MRS rating; and PE pipes (outside diameter<i> d</i><sub>n</sub>) with a peelable and contiguous thermoplastics additional layer on the outside (coated pipe).</p> |
| Reģistrācijas numurs (WIID) | 59129 |
| Darbības sfēra | <p>ISO 4437-2:2014 specifies the characteristics of pipes made from polyethylene (PE) for piping systems in the field of the supply of gaseous fuels.</p> <p>It also specifies the test parameters for the test methods referred to in this International Standard.</p> <p>In conjunction with part of ISO 4437-1, ISO 4437-3, 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: the maximum operating pressure (MOP) is based on the design stress determined from the compound minimum required strength (MRS) divided by the <i>C</i> factor, and taking into account rapid crack propagation (RCP) requirements; and a temperature of 20 °C is taken as reference temperature for the design basis.</p> <p>ISO 4437-2:2014 covers three types of pipes: PE pipes (outside diameter <i>d</i><sub>n</sub>) including any identification stripes; PE pipes with co-extruded layers on either or both the outside and/or inside of the pipe (total outside diameter <i>d</i><sub>n</sub>), where all PE layers have the same MRS rating; and PE pipes (outside diameter<i> d</i><sub>n</sub>) with a peelable and contiguous thermoplastics additional layer on the outside (coated pipe).</p> |
| Statuss | Atcelts |
| ICS grupa | 75.200 83.140.30 |