All product and services provided by Siam Fittings Co., Ltd. Shall conform to the standard requirements and by our customers. Each employee is responsible for his or her input to the procurement, production, support, delivery service, corporate with supplier of management provided.

 

  

          We are committed to continually improving all products and services and to maintain Siam Fittings as Quality Leader in our field, by Involvement of people, Leadership, Process approach, System approach to management and making decision base on fact.

 

 

 
 
American 150lbs/300lbs
British 150lbs
Din 150lbs
1. Material
ASTM A197 / A197M
Equivalent to
Equivalent to
1.1 Tensile Strength
Min. 40,000 P.S.I. (28.4 Kg/mm2)
EN1562 EN-GJMB-300-6
EN1562 EN-GJMB-300-6
1.2 Elongation
Min.5%
 
 
2. Dimension
 
 
 
2.1 Fitting Dimension
ASME B16.3
ASME B16.3
ASME B16.3
2.2 Union Dimension
     
2.2.1 Union Brass Seat
ASME B16.39 ASME B16.39 ASME B16.39
2.2.2 Union Iron to Iron
N/A   EN 10242
2.3 Plug&Bushing Dimension
ASME B16.14 ASME B16.14 ASME B16.14
3. Threads
ASME B 1.20.1 ISO 7-1 (Rc, R) ISO 7-1 (Rp, R)
4. Zinc Coating
ASTM A153 / A153M Sec 5.3 BS 143&1256 Sec 5.2 EN10242
5. Working Pressure
150 P.S.I.@ 350oF
300 P.S.I. @550oF
150 P.S.I. @ 350oF 150 P.S.I. @ 350oF
 


 

Appendix A. Metric System Table with English Equivalents

Millmeters
Inches
Millmeters
Inches
Millmeters
Inches
Millmeters
Inches
Millmeters
Inches
4 =
1/8
8 =
1/4
10 =
3/8
15 =
1/2
20 =
3/4
25 =
1
32 =
1 1/4
40 =
1 1/2
50 =
2
65 =
2 1/2
80 =
3
100 =
4
125 =
5
150 =
6
-
-



Appendix B. Basic Dimension, for American Standard Pipe Threads This information is selected from the American for Pipe Threads,ANSI B1.20.1-1983 Table 2.

Figure 4 (Taper)
H = 0.8660 x P
h = 0.8000 x P
 
Figure 5 (Taper)
L2 = (0.8D + 6.8) 1/n

* Straight Pipe Threads : the pitch, angle, and depth of thread are the same as the corresponding dimensions of the taper pipe threads.

 

 

     Table1 Basic Dimensions
Dimensions, In Inch
Size O.D. of Pipe (D) Threads
/in.
(N)
Pitch of Thread (P) Pitch Dia. at Beginning of External (EO) Handtight Engagement Effective Thread. Extenal Depth of thread

h
Length(L1) Dia.(E1) Length(L2) Dia.(E2)
Inch Thread Inch Thread

1/8
1/4
3/8
1/2
3/4
1
1 1/4
1 1/2
2
2 1/2
3
3 1/2
4
5
6

0.405
0.540
0.675
0.840
1.050
1.315
1.660
1.900
2.375
2.875
3.500
4.000
4.500
5.563
6.625

27.0
18.0
18.0
14.0
14.0
11.5
11.5
11.5
11.5
8.0
8.0
8.0
8.0
8.0
8.0

0.037
0.055
0.055
0.071
0.071
0.086
0.086
0.086
0.086
0.125
0.125
0.125
0.125
0.125
0.125

0.363
0.477
0.612
0.758
0.967
1.213
1.557
1.796
2.269
2.719
3.340
3.837
4.334
5.390
6.446

0.161
0.227
0.240
0.320
0.339
0.400
0.420
0.420
0.436
0.682
0.766
0.821
0.844
0.937
0.958

4.36
4.10
4.32
4.48
4.75
4.60
4.83
4.83
5.01
5.46
6.13
6.57
6.75
7.50
7.66

0.373
0.491
0.627
0.778
0.988
1.238
1.583
1.822
2.296
2.762
3.388
3.888
4.387
5.449
6.505

0.263
0.401
0.407
0.533
0.545
0.682
0.706
0.723
0.756
1.137
1.200
1.250
1.300
1.406
1.512

7.12
7.23
7.34
7.47
7.64
7.85
8.13
8.32
8.70
9.10
9.60
10.00
10.40
11.25
12.21

0.380
0.502
0.637
0.791
1.001
1.256
1.601
1.841
2.316
2.790
3.415
3.915
4.415
5.478
6.540

0.029
0.044
0.044
0.057
0.057
0.069
0.069
0.069
0.069
0.100
0.100
0.100
0.100
0.100
0.100



Appendix C. Basic Dimenstion, External and Internal Straight Pipe Thread for Locknut Connections, NPSL This information is selected from the American for Pipe Threads, ANSI B1.20.1-1983 Table 7.

 


 

Nominal Pipe Size O.D.of Pipe Threads Inch External Thread Internal Threads
Maximum Major Diameter Pitch Diameter Minimum Minor Diameter Pitch Diameter
Maximum Minimum Minimum Maximum
1 2 3 4 5 6 7 8 9

1/8
1/4
3/8
1/2
3/4
1
1 1/4
1 1/2
2
2 1/2
3
3 1/2
4
5
6

0.405
0.540
0.675
0.840
1.050
1.315
1.660
1.900
2.375
2.875
3.500
4.000
4.500
5.563
6.625

27.0
18.0
18.0
14.0
14.0
11.5
11.5
11.5
11.5
8.0
8.0
8.0
8.0
8.0
8.0

0.409
0.541
0.678
0.844
1.054
1.318
1.663
1.902
2.376
2.877
3.503
4.003
4.502
5.564
6.620

0.3840
0.5038
0.6409
0.7963
1.0067
1.2604
1.6051
1.8441
2.3180
2.7934
3.4198
3.9201
4.4184
5.4805
6.5372

0.3805
0.4986
0.6357
0.7896
1.0000
1.2523
1.5970
1.8360
2.3099
2.7817
3.4081
3.9084
4.4067
5.4688
6.5255

0.362
0.470
0.607
0.753
0.964
1.208
1.553
1.792
2.265
2.718
3.344
3.845
4.343
5.405
6.462

0.3863
0.5073
0.6444
0.8008
1.0112
1.2658
1.6106
1.8495
2.3234
2.8012
3.4276
3.9279
4.4262
5.4884
6.5450

0.3989
0.5125
0.6496
0.8075
1.0179
1.2739
1.6187
1.8576
2.3315
2.8129
3.4393
3.9396
4.4379
5.5001
6.5567



Appendix D. Basic Dimenstions for British Standard Pipe Threads This information is selected from the British Standard Specification Pipe Threads B.S. 21 : 1985 Table 2

Figure 1(parallel) Figure 2 (Taper)
H = 0.960491 x p
h = 0.610327 x p
h = 0.137329 x p
Taper 1 in 16 on dla Figure 3 (Taper)
H = 0.960237 x p (Shown exaggerated)
H = 0.610327 x p (in diagram)
H = 0.137278 x p Axis of screw
(a) Exteamal (b) External
thread of thread of
maximum gauae maximum gauae
langth langth

 


 

     Table2 Basic Sizes
Dimensions, In mm.
Thread size disignation Number of thesds in 25.4 mm. Pitch P Depth of thread
h
Basic diameters at gauge plane Gauge Length
Basic gauge Length
Major d Pitch d2 Minor d1 Basic TI/2 Maximum Minimum

1/8
1/4
3/8
1/2
3/4
1
1 1/4
1 1/2
2
2 1/2
3
4
5
6

28
19
19
14
14
11
11
11
11
11
11
11
11
11

0.907
1.337
1.337
1.814
1.814
2.309
2.309
2.309
2.309
2.309
2.309
2.309
2.309
2.309

0.581
0.856
0.856
1.162
1.162
1.479
1.479
1.479
1.479
1.479
1.479
1.479
1.479
1.479

9.728
13.157
16.662
20.955
26.441
33.249
41.910
47.803
59.614
75.184
87.884
113.030
138.430
163.830

9.147
12.301
15.806
19.793
25.279
31.770
40.431
46.324
58.135
73.705
86.405
111.551
136.951
162.351

8.566
11.445
14.950
18.631
24.117
30.291
38.952
44.845
56.656
72.226
84.926
110.072
135.472
160.872

4.0
6.0
6.4
8.2
9.5
10.4
12.7
12.7
15.9
17.5
20.6
25.4
28.6
28.6

±0.9
±1.3
±1.3
±1.8
±1.8
±2.3
±2.3
±2.3
±2.3
±3.5
±3.5
±3.5
±3.5
±3.5

4.9
7.3
7.7
10.0
11.3
12.7
15.0
15.0
18.2
21.0
24.1
28.9
32.1
32.1

3.1
4.7
5.1
6.4
7.7
8.1
10.4
10.4
13.6
14.0
17.1
21.9
25.1
25.1

6.5
9.7
10.1
13.2
14.5
16.8
19.1
19.1
23.4
26.7
29.8
35.8
40.1
40.1



Appendix E. Basic Dimenstions for German Standard Pipe Threads This information is selected from the Whitworth Pipe Threads DIN 2999 : 1960

H = 0.960237 x p
h = 0.640327 x p
r = 0.137278 x p
Taper 1: 16
Taper Threads
H = 0.960237 x p
h = 0.640327 x p
r = 0.137278 x p
Parallel Thrads
 
(unit : mm.)

 

 

Size of Thread Inches Normal widit of the tubes Distance of the Thread measures Effective length of
L2
Inch mm. Measuring Plane
L1
Outside diameter
E
Flange diameter
D2
Core diameter
D1
Pitch
P
Number theads
Per lin z
Depth og thread
H
Radius
R

1/8
1/4
3/8
1/2
3/4
1
1 1/4
1 1/2
2
2 1/2
3
3 1/2
4
5
6

1/8
1/4
3/8
1/2
3/4
1
1 1/4
1 1/2
2
2 1/2
3
3 1/2
4
5
6

6
8
10
15
20
25
32
40
50
65
80
90
100
125
150

4.0
6.0
6.4
8.2
9.5
10.4
12.7
12.7
15.9
17.5
20.6
22.2
25.4
28.6
28.6

9.728
13.157
16.662
20.955
26.441
33.249
41.910
47.803
59.614
75.184
87.884
100.330
113.030
138.430
163.830

9.147
12.301
15.806
19.793
25.279
31.770
40.431
46.324
58.135
73.705
86.405
98.851
111.551
136.951
162.351

8.566
11.445
14.950
18.631
24.117
30.291
38.952
44.845
56.656
72.226
84.926
97.372
110.072
135.472
160.872

0.907
1.337
1.337
1.814
1.814
2.309
2.309
2.309
2.309
2.309
2.309
2.309
2.309
2.309
2.309

28
19
19
14
14
11
11
11
11
11
11
11
11
11
11

0.581
0.856
0.856
1.162
1.162
1.479
1.479
1.479
1.479
1.479
1.479
1.479
1.479
1.479
1.479

0.125
0.184
0.184
0.249
0.249
0.317
0.317
0.317
0.317
0.317
0.317
0.317
0.317
0.317
0.317

6.5
9.7
10.1
13.2
14.5
16.8
19.1
19.1
23.4
26.7
29.8
31.4
35.8
40.1
40.1


 

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