55°非螺纹密封的管螺纹基本尺寸和公差 (GB/T 7307—2001) /mm

55°非螺纹密封的管螺纹 (GB/T 73072001)                                     mm

   

尺寸

代号

25.4mm

内的牙数

n

螺距

P

牙高

h

圆弧

半径

r

   

   

大径

dD

中径

d2D2

小径

d1D1

大径公差Td

中径公差Td2

中径公差

小径公差TD1

下偏差

上偏差

下偏差

上偏差

下偏差

上偏差

下偏差

上偏差

A

B

1/16

28

0.907

0.581

0.125

7.723

7.142

6.561

-0.214

0

-0.107

-0.214

0

0

+0.107

0

+0.282

1/8

28

0.907

0.581

0.125

9.728

9.147

8.566

-0.214

0

-0.107

-0.214

0

0

+0.107

0

+0.282

1/4

19

1.337

0.856

0.184

13.157

12.301

11.445

-0.250

0

-0.125

-0.250

0

0

+0.125

0

+0.445

3/8

19

1.337

0.856

0.184

16.662

15.806

14.950

-0.250

0

-0.125

-0.250

0

0

+0.125

0

+0.445

1/2

14

1.814

1.162

0.249

20.955

19.793

18.631

-0.284

0

-0.142

-0.284

0

0

+0.142

0

+0.541

5/8

14

1.814

1.162

0.249

22.911

21.749

20.587

-0.284

0

-0.142

-0.284

0

0

+0.142

0

+0.541

3/4

14

1.814

1.162

0.249

26.441

25.279

24.117

-0.284

0

-0.142

-0.284

0

0

+0.142

0

+0.541

7/8

14

1.814

1.162

0.249

30.201

29.039

27.877

-0.284

0

-0.142

-0.284

0

0

+0.142

0

+0.541

1

11

2.309

1.479

0.317

33.249

31.770

30.291

-0.360

0

-0.180

-0.360

0

0

+0.180

0

+0.640

11/8

11

2.309

1.479

0.317

37.897

36.418

34.939

-0.360

0

-0.180

-0.360

0

0

+0.180

0

+0.640

11/4

11

2.309

1.479

0.317

41.910

40.431

38.952

-0.360

0

-0.180

-0.360

0

0

+0.180

0

+0.640

11/2

11

2.309

1.479

0.317

47.803

46.324

44.845

-0.360

0

-0.180

-0.360

0

0

+0.180

0

+0.640

13/4

11

2.309

1.479

0.317

53.746

52.267

50.788

-0.360

0

-0.180

-0.360

0

0

+0.180

0

+0.640

2

11

2.309

1.479

0.317

59.614

58.135

56.656

-0.360

0

-0.180

-0.360

0

0

+0.180

0

+0.640

21/4

11

2.309

1.479

0.317

65.710

64.231

62.752

-0.434

0

-0.217

-0.434

0

0

+0.217

0

+0.640

21/2

11

2.309

1.479

0.317

75.184

73.705

72.226

-0.434

0

-0.217

-0.434

0

0

+0.217

0

+0.640

23/4

11

2.309

1.479

0.317

81.534

80.055

78.576

-0.434

0

-0.217

-0.434

0

0

+0.217

0

+0.640

3

11

2.309

1.479

0.317

87.884

86.405

84.926

-0.434

0

-0.217

-0.434

0

0

+0.217

0

+0.640

31/2

11

2.309

1.479

0.317

100.330

98.851

97.372

-0.434

0

-0.217

-0.434

0

0

+0.217

0

+0.640

4

11

2.309

1.479

0.317

113.030

111.551

110.072

-0.434

0

-0.217

-0.434

0

0

+0.217

0

+0.640

41/2

11

2.309

1.479

0.317

125.730

124.251

122.772

-0.434

0

-0.217

-0.434

0

0

+0.217

0

+0.640

5

11

2.309

1.479

0.317

138.430

136.951

135.472

-0.434

0

-0.217

-0.434

0

0

+0.217

0

+0.640

51/2

11

2.309

1.479

0.317

151.130

149.651

148.172

-0.434

0

-0.217

-0.434

0

0

+0.217

0

+0.640

6

11

2.309

1.479

0.317

163.830

162.351

160.872

-0.434

0

-0.217

-0.434

0

0

+0.217

0

+0.640

:本标准适应用于管接头、旋塞、阀门及其附件。

①对薄壁管件,此公差适用于平均中径,该中径是测量两个互相垂直直径的算术平均值。