Table 1.
0
Used drillpipe Inspection – Comparison of NS-2 & DS-1 Category 5
NS-2 DS-1
Tube (Including Slip / Upset Areas
Visual R R
Dimensional (OD Gauge) R R
Ultrasonic Wall Thickness R R
EMI (Transverse Only) R -
EMI (Transverse & Wall Thickness) - R*
Slip / Upset Area Only
MPI (Wet Visible) R -
MPI (Dry Powder or Wet Fluorescent) - R
Ultrasonic Shear Wave (Transverse Only) R R
MIU Check on 10% of Pipe Inspected R -
Tool Joint & Connection
Visual
Weight / Grade Stencils - R
Seal Surfaces R R
Re-facing Check R R
Bevel Width R R
Thread Surfaces R R
Pin Thread Profile R R
Box Swell R R
Hardfacing R R
Cracks R R
Dimensional
Box OD R R
Pin ID R R
Box Shoulder Width R R
Box & Pin Tong Space R R
Box Swell R R
Box Counterbore Depth R R
Box Counterbore Diameter R R
Pin Lead R R
Box & Pin Bevel Diameter R R
Box Seal Width R R
Shoulder Flatness R R
Pin Neck Length R R
MPI (Wet Fluorescent Method) R R**
ATI O -
R = Required Inspection
O = Optional Inspection
* = May be replaced by FLUT1 or EMI 1 plus UT wall if EMI 2 equipment not available
** = May be omitted unless tool joint fatigue cracks have occurred
Table 1.0
Used drillpipe Inspection – Comparison of NS-2 & DS-1 Category 5
