This document contains specifications for drill pipe including: - Dimensions, weights, and material grades for various pipe sizes - Allowable tolerances for outside diameter, wall thickness, and weight - Standard length ranges for drill pipe - Chemical composition and mechanical property requirements for different grades - Details on end connections and whether they are internally and/or externally upset

1.
A.P.I. R
SIZE
2 3/8
2 7/8
3 1/2
4 1/2
5 1/2
†6 5/8
7 5/8
8 5/8
* 5 1/4
† THRE
REGULAR
A B
3 3 1/
3 1/2 3 3/
3 3/4 4 1/
4 1/4 *5 1
4 3/4 6 3/
5 7 3/
5 1/4 8 7/
5 3/8 10
4 O.D. IS OPTI
EADED PORTI
C
/8 2 3/8
/4 3
/4 3 1/2
1/2 4 5/8
/4 5 33/64
/4 6
/8 7
7 61/64
IONAL
ON SAME AS
D E
1 7/8 2
2 1/8 3
2 9/16 3
3 9/16 4
4 21/64 5
5 3/32 6
5 11/16 7
6 13/64 8
5 1/4 UNION
E F
2 11/16 3 3/
3 1/16 3 7/
3 9/16 4 1/
4 11/16 4 5/
5 37/64 5 1/
6 1/16 5 3/
7 1/16 5 5/
8 1/64 5 3/
N TOOL FULL
G H
/8 1 5
/8 1 1/4 5
/8 1 1/2 5
/8 2 1/4 5
/8 2 3/4 4
/8 3 1/2 4
/8 4 4
/4 4 3/4 4
HOLE
K
3
3
3
3
3
2
3
3

2. A.P.I. INTERNAL FLUSH
SIZE A B C D E F G H K
2 3/8 3 3 3/8 2 7/8 2 3/8 2 15/16 3 3/8 1 3/4 4 2
2 7/8 3 1/2 4 1/8 3 25/64 2 13/16 3 29/64 3 7/8 2 1/8 4 2
3 1/2 4 4 3/4 4 1/64 3 11/32 4/64 4 3/8 2 11/16 4 2
4 4 1/2 5 3/4 4 63/64 4 5/64 4 29/32 4 7/8 3 1/4 4 2
4 1/2 4 1/2 6 1/8 5 1/4 4 1/2 5 5/16 4 7/8 3 3/4 4 2
5 1/2 5 7 3/8 6 25/64 5 9/16 6 29/64 5 3/8 4 13/16 4 2
A.P.I. FULL HOLE
SIZE A B C D E F G H K
*2 7/8 3 1/2 4 1/4 3 5/8 2 3/4 3 11/16 3 7/8 2 1/8 5 3
3 1/2 3 3/4 4 5/8 4 3 1/16 4 3/64 4 1/8 2 7/16 5 3
4 4 1/2 5 1/4 4 9/32 3 17/32 4 11/32 4 7/8 2 13/16 †4 2
4 1/2 4 5 3/8 4 51/64 3 51/64 4 7/8 4 3/8 3 5 3
5 1/2 5 7 5 53/64 5 5 22/32 5 3/8 4 4 2
6 5/8 5 8 6 3/4 5 59/64 6 27/32 5 3/8 5 4 2
NOT A.P.I STANDARD †THREAD FORM SAME AS A.P.I.‐I.F. JOINT

3. Standard: API SPEC 5D
Size
Designation Nominal
Weight
Calculated
Weight Wpe
Grade
Wall Thickness Upset Ends,
for Weld‐on
Tool Joins(see
note) in. mm lb/ft kg/m in. mm
2 3/8 60.3 6.65 6.26 9.32 E,X,G,S 0.280 7.11 EU
2 7/8 73.0 10.4 9.72 14.48 E,X,G,S 0.362 9.19 EU 、 IU
3 1/2 88.9 9.50 8.81 13.12 E 0.254 6.45 EU 、 IU
3 1/2 88.9 13.30 12.31 18.34 E,X,G,S 0.368 9.35 EU 、 IU
3 1/2 88.9 15.50 14.63 21.79 E 0.449 11.40 EU 、 IU
3 1/2 88.9 15.50 14.63 21.79 X,G,S 0.449 11.40 EU 、 IEU
4 101.6 14.00 12.93 19.26 E,X,G,S 0.330 8.38 EU 、 IU
4 1/2 114.3 13.75 12.24 18.23 E 0.271 6.88 EU 、 IU
4 1/2 114.3 16.60 14.98 22.31 E,X,G,S 0.337 8.56 EU 、 IEU
4 1/2 114.3 20.00 18.69 27.84 E,X,G,S 0.430 10.92 EU 、 IEU
5 127.0 16.25 14.87 22.15 X,G,S 0.296 7.52 IU
5 127.0 19.50 17.93 26.71 E 0.362 9.19 IEU
5 127.0 19.50 17.93 26.71 X,G,S 0.362 9.19 EU 、 IEU
5 127.0 25.60 24.03 35.79 E 0.500 12.70 IEU
5 127.0 25.60 24.03 35.79 X,G,S 0.500 12.70 EU 、 IEU
5 1/2 139.7 21.90 19.81 29.51 E,X,G,S 0.361 9.17 IEU
5 1/2 139.7 24.70 22.54 33.57 E,X,G,S 0.415 10.54 IEU
Note:EU‐External Upset; IU‐Internal Upset; IEU‐Internal & External Upset

4.
Outside Diameter,Wall Thickness and Weight Tolerance:
Item Tolerance
Pipe
Body
Outside Diameter
D＜114.3mm,±0.79mm
D≥114.3mm,±1.0‐0.5%D
Wall Thickness ﹣12.5%
Weight
Single Lengths +6.5%,﹣3.5%
Carloads ﹣1.75%
Lengths:
Range
Name
Range1 Range2 Range3
Drill Pipe 5.49 ~ 6.71 m 8.23 ~ 9.14 m
11.58 ~ 13.72
m
Chemical Composition:
Grade
Chemical Composition (%)
P≤ S≤
E‐75 0.030 0.030
X‐95 0.030 0.030
G‐105 0.030 0.030
S‐135 0.030 0.030

5. Mechanical Properties:
Grade
Yield Strength Tensile Strength
Elongation(%) min. max. min.
Psi MPa Psi MPa Psi MPa
E—75 75000 517 105000 724 100000 689 17
X—95 95000 655 125000 862 105000 724 16.5
G—105 105000 724 135000 931 115000 793 15
S—135 135000 931 165000 1138 145000 1000 12.5