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  1. netfey

    BLOW DOWN

    of course on liquid.... i am asking 'cos i do not know how i am going to pressure test the pipe.... i know that you shoud do it on ground level (before mounting it) but i can not make an order for a 2 pairs of flanges (one slip and one blid) to make the test 'cos Investor is going to tell me...
  2. 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
  3. 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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