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[2] GALVANISED MALLEABLE IRON PIPE FITTINGS
Specifications
STANDARD AND IDENTIFICATION:
Standard for production and use EN 10242 : 1994
Fittings made of high quality blackheart malleable cast iron to ASTM A-197, ASTM A47
THREADS:
The threads are cut according to AS 1722.1 / ISO 7/1. Parallel internal thread (RP) and tapered external thread (R).
APPLICATION:
All the fittings are adequate for the supply of water at recommended maximum working pressure of 1379kPa
and gas, steam and compressed air at recommended maximum working pressure of 1034 kPa. Note: Working pressures may
also be limited by relevant pressure piping codes or Industry regulations.
DIMENSIONS:
All the fittings are manufactured to the specifications of standard BS EN 10242, BS 143, BS 1256
INSPECTION:
All the fittings are inspected for conformity with the specifications of standard EN 10242.
MARKING:
All the fittings, when possible, are marked with brand and/or with the nominal size Identification.
HOT DIP:
The fittings are delivered in hot dip galvanised finish, as prescribed by the standard EN 10242.
LEAK TEST:
Applying the standard EN 10242 each individual fitting is subjected to a pressure test with a min. Hydrostatic
pressure of 2068 kPa, which is equivalent to a pneumatic pressure of min. 500 kPa, without showing any sign of leakage or
abnormality.
BRITISH STANDARD THREADS
All measurements in mm
NOMINAL BORE
OF PIPE
APPROX.
OUTSIDE
DIAMETER
NUMBER OF
THREADS
PER INCH
PITCH
DEPTH OF
THREADS
DIAMETER
AT GAUGE
PLANE
LENGTH OF
USEFUL
THREAD
IMPERIAL
METRIC
A
P
h
B
E
1/8
6
10.16
28
0.907
0.581
9.72
6.5
1/4
8
13.66
19
1.337
0.856
13.15
9.7
3/8
10
17.17
19
1.337
0.856
16.66
10.1
1/2
15
21.51
14
1.814
1.162
20.95
13.2
3/4
20
27.00
14
1.814
1.162
26.44
14.5
1
25
33.93
11
2.309
1.479
33.24
16.8
1 1/4
32
42.59
11
2.309
1.479
41.91
19.1
1 1/2
40
48.48
11
2.309
1.479
47.80
19.1
2
50
60.47
11
2.309
1.479
59.61
23.4
2 1/2
65
76.09
11
2.309
1.479
75.18
26.7
3
80
88.87
11
2.309
1.479
87.88
29.8
4
100
114.14
11
2.309
1.479
113.03
35.8
5
125
139.65
11
2.309
1.479
138.43
40.1
6
150
165.12
11
2.309
1.479
163.83
40.1
r
r
h
H/6
H/6
H
27.5°
(Pitch p)
r
r
27.5°
H h
(Pitch p)
90°
A
B
F
E
Fig. 1. (Parallel)
H = 0.960491 x p
h = 0.640327 x p
r = 0.137329 x p
Fig. 2. (Taper)
H = 0.960237 x p
h = 0.640327 x p
r = 0.137278 x p
Fig. 3. (Taper)
Axis of screw
Taper 1 in 16 in on dia.
(Shown exaggerated in diagram)
