Latest posts
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Gauge pigs, and reading the plate on receipt
A gauge plate proves the bore is clear for what follows. How plates are sized, what deformation patterns mean, and why the reading matters more than the pass.
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Dewatering after a hydrostatic test, and why it decides the schedule
Dewatering removes bulk water after a test, but what it leaves behind determines how long drying takes. Train design, pig selection and disposal.
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Cleaning runs before a hydrostatic test, and how to know when to stop
How many cleaning passes a line needs before it can be filled and tested, what each pass should return, and the stopping criterion crews argue about.