Industry data: (2 3/8″ BN 6.65# S-135 IF) drill pipe 
ParameterValue
Nominal Outer Diameter (OD)2.375 in
Nominal Weight6.65 lb/ft
Inside Diameter (ID)1.815 in
Wall thickness0.280 in
Drift Diameter1.625 in
Tube GradeS-135
Tensile Yield (new)248,800 lb
Premium (80%) Tensile~199,040 lb
Torsional Yield (new)11,300 ft-lb
Torsional Yield (premium)8,700 ft-lb
Burst (new / premium)27,853 / 25,465 psi
Collapse (new / premium)28,079 / 24,080 psi
Connection TypeNC-26 (2 3/8″ IF)
Connection OD~3⅜ in
Connection (min. OD)~3¼ in
Connection ID~1¾ in
Adjusted Weight / ft6.97 lb/ft
Avg Joint Length / Joint Weight~31 ft (per joint length typical)
Displacement (open)0.107 gal/ft (0.255 bbl/100 ft)
Capacity0.131 gal/ft (0.312 bbl/100 ft)
You may also see lighter variants (e.g. 4.85 lb/ft, wall 0.190 in) in other grades.