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What is the expansion for the hot water applications?

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What is the expansion for the hot water applications?

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Under a temperature of 50C, 1 m. of PN 20 pipe elongates 4.5 mm. This value is 0.9 mm for 1 m. of PN 25 Al foiled pipe for 50C.

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Under a temperature of 50°C, 1 m. of PN 20 pipe elongates 4.5 mm. This value is 0.9 mm for 1 m. of PN 25 Al foiled pipe for 50°C.

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