Nominal diameter ND

external diameter pipe body and allowable variatoin

intwine external diameter pipe fitting and allowable variation

minimum bending radius

working pressure(MPa)

specification seal loose nut

Φ6

 10.5--0.30

12—0.30

≮10×ND

≮15×ND

10

M12×1.25

Φ8

12.5—0.30

14—0.30

≮10×ND

≮15×ND

10

M14×1.25

Φ10

14.5—0.30

16—0.30

≮10×ND

≮15×ND

10

M16×1.25

Φ12

16.5—0.30

18—0.30

≮10×ND

≮15×ND

8

M20×1.25

Φ14

18.5—0.30

20—0.30

≮10×ND

≮15×ND

8

M22×1.25

Φ18

24.5—0.30

26—0.30

≮10×ND

≮15×ND

8

M30×1.25

Φ20

26.5—0.30

28—0.30

≮10×ND

≮15×ND

6．4

M33×2

Φ25

32.5—0.30

34—0.30

≮10×ND

≮15×ND

6．4

M39×2

Φ32

40.6—0.30

42—0.30

≮10×ND

≮15×ND

4

M48×2

Φ38

50.6—0.30

52—0.30

≮10×ND

≮15×ND

4

M56×2

Φ40

52.6—0.30

54—0.30

≮10×ND

≮15×ND

4

M58×2

Φ50

62.5—0.30

64—0.30

≮10×ND

≮15×ND

3．5

M70×2

Φ65

76—0.30

78—0.30

≮10×ND

≮15×ND

3．1

Flange connecting in accordance with
GB9113

GB9118

GB9119

Φ80

96—0.30

99—0.30

≮10×ND

≮15×ND

2．4

Φ100

125—0.40

128—0.40

≮10×ND

≮15×ND

1．9

Φ125

154—0.40

184—0.40

≮10×ND

≮15×ND

1．5

Φ150

180—0.40

184—0.40

≮10×ND

≮15×ND

1．1

Φ175

210—0.50

214—0.60

≮10×ND

≮15×ND

1

Φ200

240—0.50

244—0.50

≮10×ND

≮15×ND

0．85

Φ250

290—0.50

294—0.50

≮10×ND

≮15×ND

0．6

Φ300

345—0.50

350—0.50

≮10×ND

≮15×ND

0．25

Φ350

400—0.50

406—0.50

≮10×ND

≮15×ND

0．25

Φ400

450—0.50

456—0.50

≮10×ND

≮15×ND

0．25

Remark :

• if clients need flange connecting, remarking in the contract when ordering goods.
• if specification of seal loose nut needs to be changed, remarking in the contract when ordering goods.
• special requirements out of this table estimate to produce according to the need of clients