The thread connection's root fillet radius of 0.038$ size is the greatest weakness of the API NC type joints and thread. During the slimehole drilling, especially in the deep and ultra-deep gas well, ...
When an 8,000 MW coal plant upgraded its scrubbers, a coupling developed especially for use in wet flue gas desulfurization (FGD) systems was used for the nozzle-to-header pipe connections, instead of ...
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