RC Drilling Supplies: 3.25 inch OD Drill pipe specs

SPECIFICATIONS 3.25 inch DUAL TUBE RC PIPE

STANDARD LENGTHS	Make-up Length 5 ft. and 10 ft. (also available in metric 1.5 and 3.0 meter sizes)
TOOL JOINT	Heat Treated 4130 Alloy 34-38 RC Minimum Yield Strength 110 ksi O.D. 3.350"
OUTER TUBE	Minimum Yield Strength 80 ksi O.D. 3.250" I.D. 2.812" Wall 0.219"
INNER TUBE	Minimum Yield Strength 80 ksi O.D. 1.875" I.D. 1.500" Wall 0.188"
INNER PIPE ENDS	Male 4130 Alloy 42-45 RC Female 4130 Alloy 34-36 RC
ROD WEIGHT	115 lbs. per 10 ft. 61lbs. per 5 ft.
TORQUE RATING	4,500 lbs. - ft.
TENSION RATING	65,000 lbs. (30,000 kg)
FLATS	2.750" Across X 2.00" High 3.750" From Shoulder On Box 0.750" From Shoulder On Pin
O-RINGS	2 each Nitrile #224
INNER TUBE SEALING	Inner Tubes make up and seal along with tool joints.