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O que significa “57/49” em “Tamanho do tubo” (Line Size) na tabela de dados da válvula de controle?

2016-02-15View Original

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No quadro de dados da válvula de controle do instrumento, o que significa a especificação do tubo (Line Size) 57/49?
Reply #22016-02-15
Deve ser um tubo com diâmetro externo de 57 mm e diâmetro interno de 49 mm.
Reply #32016-02-16
Geralmente, só se indica o diâmetro externo e a espessura da parede; isso não é muito padrão.

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