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Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 2- Pipes. Original standard UNE-EN 1555-2-2026 in PDF full version. Additional info + preview on request

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Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 3- Fittings. Original standard UNE-EN 1555-3-2026 in PDF full version. Additional info + preview on request

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Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 4- Valves. Original standard UNE-EN 1555-4-2026 in PDF full version. Additional info + preview on request

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Bitumens and bituminous binders. Determination of adhesivity of cut-back and fluxed bituminous binders by water immersion test. Aggregate method. Original standard UNE-EN 15626-2026 in PDF full version. Additional info + preview on request

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Ventilation for buildings. Ductwork. Cleanliness of ventilation systems. Original standard UNE-EN 15780-2026 in PDF full version. Additional info + preview on request

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Water quality. Guidance standard on determining the degree of modification of river hydromorphology. Original standard UNE-EN 15843-2026 in PDF full version. Additional info + preview on request

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