HQ NQ BQ Heavy Weight Coupling Water Well Drill Pipe Range 3 Length OD 5-420mm

MECHANICAL PROPERTIES min

Steel grade

Tensile strength Mpa

Yeild point or proof stress Mpa

Elongation %

 STM-C-540

540

-

18

 STM-C-640

640

-

16

STM-R-590

590

375

18

STM-R-690

690

440

16

 STM-R-780

780

520

15

STM-R-830

830

590

10

Outside Diameter,wall Thickness and Mass (for casing Tube)

Nominal diameter

Outside diameter mm

Inside diameter

Wall thickness mm

Unit mass kg/m

43

43

37

3

2.96

53

53

47

3

3.7

63

63

57

3

4.44

73

73

67

3

5.18

83

83

77

3

5.92

97

97

90

3.5

8.07

112

112

105

3.5

9.36

127

127

118

4.5

13.6

142

142

133

4.5

15.3

Outside Diameter,wall Thickness and Mass (for Core tube)

Nominal diameter

Outside diameter mm

Inside diameter

Wall thickness mm

Unit mass kg/m

34

34

26.5

3.75

2.8

44

44

34.5

4.75

4.6

54

54

44.5

4.75

5.77

64

64

54.5

4.75

6.94

74

74

64.5

4.75

8.11

84

84

74.5

4.75

9.28

99

99

88.5

5.25

12.1

114

114

103.5

5.25

14.1

129

129

118.5

5.25

16

144

144

133.5

5.25

18

180

180

168

6

25.7

Outside Diameter,wall Thickness and Mass (for Drill Rod)

Nominal diameter

Outside diameter mm

Inside diameter

Wall thickness mm

Unit mass kg/m

33.5

33.5

23

5.25

3.66

40.5

40.5

31

4.75

4.19

42

42

32

5

4.56

50

40

37

6.5

6.97