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pipe couplings
Figure 336
Standard, Full & Half
Size
Outside
Diameter
(Coupling)
Length
Threads
Unit Weight
Full
Half
Full
Half
Straight Tapped Taper Tapped Straight Tapped Taper Tapped
NPS DN in
mm in
mm in
mm in
mm lbs
kg
lbs
kg
lbs
kg
lbs
kg
1
⁄
8
6 0.563 14
13
⁄
16
22
11
⁄
32
9 27 686 0.03 0.01 0.03 0.01 0.01 0.00 0.01 0.00
1
⁄
4
8 0.719 18 1
3
⁄
16
30
17
⁄
32
13 18 457 0.07 0.03 0.07 0.03 0.03 0.01 0.03 0.01
3
⁄
8
10 0.875 22 1
3
⁄
16
30
17
⁄
32
13 18 457 0.10 0.05 0.10 0.05 0.05 0.02 0.05 0.02
1
⁄
2
15 1.063 27 1
9
⁄
16
40
23
⁄
32
18 14 356 0.18 0.08 0.18 0.08 0.08 0.04 0.08 0.04
3
⁄
4
20 1.313 33 1
5
⁄
8
41
3
⁄
4
19 14 356 0.26 0.12 0.26 0.12 0.12 0.05 0.12 0.05
1 25 1.576 40 2 51
15
⁄
16
24 11
1
⁄
2
292 0.42 0.19 0.42 0.19 0.18 0.08 0.18 0.08
1
1
⁄
4
32 1.900 48 2
1
⁄
16
52
31
⁄
32
25 11
1
⁄
2
292 0.50 0.23 0.50 0.23 0.23 0.10 0.23 0.10
1
1
⁄
2
40 2.200 56 2
1
⁄
16
52
31
⁄
32
25 11
1
⁄
2
292 0.67 0.30 0.67 0.30 0.32 0.15 0.32 0.15
2 50 2.750 70 2
1
⁄
8
54 1 25 11
1
⁄
2
292 1.03 0.47 1.03 0.47 0.47 0.21 0.47 0.21
2
1
⁄
2
65 3.250 83 3
1
⁄
8
79 1
1
⁄
2
38 8 203 2.09 0.95 2.15 0.98 0.96 0.44 0.96 0.44
3 80 4.000 102 3
1
⁄
4
83 1
9
⁄
16
40 8 203 3.36 1.52 3.46 1.57 1.60 0.73 1.60 0.73
3
1
⁄
2
90 4.625 117 3
3
⁄
8
86 1
5
⁄
8
41 8 203 4.82 2.19 5.18 2.35 2.22 1.01 2.22 1.01
4 100 5.000 127 3
1
⁄
2
89 1
11
⁄
16
43 8 203 4.80 2.18 4.87 2.21 2.11 0.96 2.11 0.96
5 125 6.296 160 3
3
⁄
4
95 1
13
⁄
16
46 8 203 8.31 3.77 8.75 3.97 3.80 1.72 3.80 1.72
6 150 7.390 188 4 102 1
13
⁄
16
46 8 203 11.18 5.07 11.88 5.39 5.28 2.39 5.28 2.39
Steel Pipe Couplings
Merchant Couplings
• Manufactured in accordance with ASTM specifcation A865 and A589.
• Merchant couplings in sizes
1
⁄
8
" NPS
(6 DN)
through 2" NPS
(50 DN)
are normally supplied straight tapped. Sizes 2
1
⁄
2
" NPS
(65 DN)
and larger are taper tapped.
• Taper tapped standard merchant couplings in sizes
1
⁄
8
" NPS
(6 DN)
through 2" NPS
(50 DN)
are available upon request.
• API line pipe couplings are used in all sizes over 6" NPS
(150 DN).
• Couplings from
1
⁄
8
" NPS
(6 DN)
through 6" NPS
(150 DN)
are dipped in rust preventative.
• Galvanized full couplings are also available.
Note
• Half couplings are chamfered on one end and squared on the other.