BS ISO 4437-5. Plastics piping systems for the supply of gaseous fuels. Polyethylene (PE). Fitness for purpose POLYETHYLENE, GAS PIPES, GAS PIPELINES, GASEOUS FUELS, GASES, PLASTICS, PIPES, UNDERGROUND, GAS SUPPLY,
Dimensions, PHYSICAL PROPERTIES OF MATERIALS, MECHANICAL PROPERTIES OF MATERIALS, MARKING, Pipe coatings, Mathematical calculations