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  • Users: netfey
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  1. netfey

    BLOW DOWN

    IS IT TRUE THAT BLOW DOWN PIPELINE SHOULD NEVER BE FILLED WITH MORE THAN 2/3 OF IT'S EFFECTIVE INTERNAL DIAMETER
  2. netfey

    astm a155 gr c55 class 2

    astm a155 was replaced with a671 (1978).... the question is: does a671 gr.55 correspond with a155 gr.55

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