Features : The spud part of the coupling serves as one half of the connection and is usually fixed to the equipment. The stem part that is clamped to the hose is the other half. The two halves are connected or disconnected by rotating the wing nut onto the spud. When connected they achieve a mechanical, as well as, a pressure seal.
Services : Couplings are all-purpose hose couplings, universally recommended for steam hose connections. They are also widely used for air, water, fluid petroleum, chemicals and liquid petroleum gas up to 1” ID. Couplings can be applied to many types of rubber, synthetic, plastic, metallic or semi-metallic hose. Consult the factory for specific media capabilities.
Purpose : Couplings supply a convenient threaded fitting to connect two lengths of hose, or a single length to a male or female threaded (NPT) outlet.
Material : • Stem: ¼” - 1” plated steel, 1¼” - 4” plated iron, 6” tubular steel • Spud: ¼” - 1” plated steel, 1¼” - 6” plated iron • Wing nut: ¼” - 1” plated steel, 1¼” - 6” plated iron
Seal Types : • Ground joint: copper or polymer seats • Washer: Klingersil® C-4401
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Steam hose coupling
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Coupling assembly
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Types of connectors
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Tail end fittings
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Connectors
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Clamps
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Bolts and nuts
Sizes : DN13 to DN25. Pressure (All sizes): Maximum working pressure 18 bar. Maximum working temperature : Steam +210°C (410°F) - Hot Water +120°C (248°F) Details : Suitable for fixing to steam hoses to BS EN 14423:2004 with safety clamps. All steam fittings are supplied with corresponding brass safety clamps.
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BS EN 14423:2004 STEAM HOSE FEMALE COUPLING |
PART NO. |
HOSE SIZE |
THREAD |
MATERIAL |
SCF13x6 Br |
13 x 6 |
1/2” BSP Pl. |
Brass |
SCF19x7 Br |
19 x 7 |
3/4” BSP Pl. |
Brass |
SCF25x7.5 Br |
25 x 7.5 |
1” BSP Pl. |
Brass |
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BS EN 14423:2004 STEAM HOSE MALE COUPLING |
PART NO. |
HOSE SIZE |
THREAD |
MATERIAL |
SCM13x6 Br |
13 x 6 |
1/2” BSPT |
Brass |
SCM19x7 Br |
19 x 7 |
3/4” BSPT |
Brass |
SCM25x7.5 Br |
25 x 7.5 |
1” BSPT |
Brass |
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For 1 to 5 see Table a : Connector end b : Tail end
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List of coupling assembly components |
Item number |
Number of parts needed for one assembly |
Denomination |
1 |
1 |
Tail end fitting |
2 |
2 |
Clamp |
3 |
4 |
Hexagon socket head cap screw |
4 |
4 |
Hexagon nut |
5 |
1 |
Connector |
Illustration |
Type |
Description |
Nominal size DN |
Thread size |
L1 ≈ mm |
Details |
 |
FL |
PN 40 loose flange with weld-neck collar as in EN 1092-1 |
15 20 25 32 40 50 |
|
110 115 115 125 140 155 |
 |
 |
FV |
PN 40 weld-neck flange as in EN 1092-1 |
|
 |
 |
G |
Union nut with thread gasket, with parallel thread according to EN ISO 228-1a |
15 20 25 32 40 50 |
G ½ G ¾ G 1 G 1¼ G 1½ G 2 |
80 80 80 90 105 115 |
 |
 |
GA |
Tapered male thread with external thread according to EN 10226-1a |
15 20 25 32 40 50 |
R ½ R ¾ R 1 R 1¼ R 1½ R 2 |
95 95 100 110 125 140 |
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a Other threads may be agreed between the purchaser and manufacturer. |
The tail end fittings of hose couplings shall have the dimensions given in Table. Their outer surface shall be formed by machining, the surface roughness Ra of 3,2 μm.
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a : Deburred b : Ribs Dimensions in millimetres
|
Nominal size DN |
d1 ± 0,2 |
d2 ± 0,2 |
d3 ± 0,3 |
d4 ± 1,0 |
d5 ± 0,1 |
f1 + 0,5 0 |
k 0 − 0,2 |
l2 ± 1 |
l3 |
Number or ribs |
l4 |
l5 |
r1 |
15 |
13 |
15 |
9 |
20 |
13 |
6 |
4 |
62 |
9 |
4 |
8 |
40 |
2 |
20 |
19 |
21 |
14 |
26 |
19 |
6 |
4 |
62 |
9 |
4 |
8 |
40 |
2 |
25 |
25 |
27 |
20 |
33 |
25 |
6 |
4 |
62 |
9 |
4 |
8 |
40 |
2 |
32 |
32 |
34 |
27 |
40 |
32 |
7 |
5 |
72 |
9 |
5 |
8 |
48 |
2 |
40 |
38 |
40,5 |
33 |
46 |
38 |
7 |
5 |
84 |
13 |
5 |
10 |
60 |
2,5 |
50 |
50 |
52,5 |
44 |
59 |
50 |
8 |
6 |
89 |
12 |
5 |
10 |
60 |
2,5 |
The weld-neck collar may either be integral to the tail end fitting or welded to it. The maximum length of type FL and FV fittings shall be in accordance with Table. Weld-neck collar PN 40 according to EN 1092-1 Loose flange PN 40 according to EN 1092-1
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Maximum length of type FL and FV fittings |
Nominal size DN |
l6, l7 max. |
15 |
108 |
20 |
110 |
25 |
110 |
32 |
122 |
40 |
137 |
50 |
149 |
EXAMPLE : Ordering designation for a type FL hose fitting (SFL), (without loose flange), for use with DN 20, in carbon steel (1.0038), hoses: Hose fitting EN 14423 — SFL 20 — 1.0038
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Weld-neck flange PN 40 |
Maximum length of type FL and FV fittings |
Nominal size DN |
l6, l7 max. |
15 |
108 |
20 |
110 |
25 |
110 |
32 |
122 |
40 |
137 |
50 |
149 |
EXAMPLE : Ordering designation for a type FV hose fitting (SFV) for use with DN 20 hoses, in carbon steel (1.0038): Hose fitting EN 14423 — SFV 20 — 1.0038
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Welding weld-neck collars to the tail end is optional for type FL fittings. Weld-neck flanges of type FV hose fittings shall be jointed with the tail end fitting by welding. Weld details shall be according to Table. The welding procedures shall be in accordance with EN ISO 15607.
a : Flange or weld-neck b : Tail end fitting
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Weld details |
Nominal size DN |
d6 |
l8 |
s1 |
15 |
21,3 |
8 |
3,2 |
20 |
26,9 |
25 |
33,7 |
32 |
42,4 |
9 |
3,6 |
40 |
48,3 |
9 |
3,6 |
50 |
60,3 |
10 |
4 |
A hose fitting with union nut (Type G) is shown in Figure. The design of type G hose fittings shall be in accordance with Table.
a : Tail end fitting b : Wire ring ∅ 3 mm, nearly closed c : Thread gasket d : Width across flats, s
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Hose fitting with union nut |
Nominal size DN |
Thread size as in EN ISO 228-1 a d7 |
d8 |
d9 0 − 0,5 |
d10 ± 1 |
d11 + 0,2 0 |
l9 |
l10 + 0,5 0 |
l11 |
l12 |
l13 |
s |
15 |
G ½ |
18,3 |
20 |
13 |
21,5 |
9,5 |
20,5 |
82,5 |
4 |
20 |
27 |
20 |
G ¾ |
24 |
26 |
18 |
26,5 |
13,5 |
24,5 |
86,5 |
24 |
32 |
25 |
G 1 |
30,2 |
33 |
23 |
33,5 |
14,5 |
25,5 |
87,5 |
5 |
25 |
41 |
32 |
G 1¼ |
38,8 |
42 |
33 |
42,5 |
14,5 |
25,5 |
97,5 |
50 |
40 |
G 1½ |
44,8 |
48 |
38 |
48,5 |
16,5 |
27,5 |
111,5 |
27 |
55 |
50 |
G 2 |
56,5 |
60 |
49 |
60,5 |
17,5 |
28,5 |
119,5 |
28 |
70 |
a : Other types of threads are to be agreed between purchaser and manufacturer. |
EXAMPLE 1 : Ordering designation for a type G hose fitting (SG) with a union nut secured by a wire ring, without thread gasket, for use with DN 20 hoses made of carbon steel (1.0038): Hose fitting EN 14423 — SG 20 — 1.0038
EXAMPLE 2 : Ordering designation for a thread gasket (D) for type G hose fittings for use with DN 20 hoses: Thread gasket EN 14423 — DG 20
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A hose fitting with tapered male thread (Type R) is shown in Figure. The design of type R hose fittings shall be in accordance with Table.
a : Width across flats, s
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Dimensions of R type fittings |
Nominal size DN |
Thread sizes as in EN 10226-1a d12 |
l14 min. |
l15 |
l16 |
s |
15 |
R ½ |
16 |
12 |
90 |
22 |
20 |
R ¾ |
17 |
12 |
91 |
27 |
25 |
R 1 |
21 |
12 |
95 |
36 |
32 |
R 1¼ |
21 |
12 |
105 |
46 |
40 |
R 1½ |
22 |
12 |
118 |
50 |
50 |
R 2 |
26 |
14 |
131 |
60 |
a : Other types of threads are to be agreed between purchaser and manufacturer.
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EXAMPLE : Ordering designation for a type R hose fitting (SR) for use with DN 20 hoses, in carbon steel (1.0038): Hose fitting EN 14423 — SR 20 — 1.0038
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A hose fitting with coned end (Type RI) is shown in Figure. The design of type RI hose fittings shall be in accordance with Table.
1 : Cone end 2 : Grooved union nut a : Tail end fitting
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Nominal size DN |
a Type of cone end |
d |
l |
l |
15 |
B15 |
24 |
17 |
79 |
20 |
B20 |
30 |
18 |
80 |
25 |
B25 |
35 |
22 |
84 |
a : Type of conical end should be in accordance with DIN 11851.
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EXAMPLE : Ordering designation for a type RI hose fitting (SRI) with cone end, without union nut, for use with DN 20 hoses, made of carbon steel (1.0038): Hose fitting EN 14423 — SRI 20 — 1.0038
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A hose fitting with stud end (Type RA) is shown in Figure. The design of type RA hose fittings shall be in accordance with Table
1 : Main gasket 2 : Stud end a : Width across flats, s b : Tail end fitting
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Dimensions of RA type hose fittings |
Nominal size DN |
Thread size d14 |
d15 |
l19 |
l20 |
l21 |
S |
15 |
Rd 34 × 1/8 |
28 |
12 |
9 |
83 |
24 |
20 |
Rd 44 × 1/6 |
31 |
14 |
10 |
86 |
27 |
25 |
Rd 52 × 1/6 |
40 |
14 |
11 |
87 |
36 |
EXAMPLE : Ordering designation for a type RA hose fitting (SRA) with stud end, without main gasket, for use with DN 20 hoses, made of carbon steel (1.0038): Hose fitting EN 14423 — SRA 20 — 1.0038
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Clamp designs are given in Figure. Clamps shall be designed according to dimensions specified in Table.
EXAMPLE : Ordering designation for a clamp (KBS), for use with DN 20 hoses, in wrought copper alloy (CW614N): Clamp EN 14423 — KBS 20 — CW614N
Clamp dimensions |
Nominal size DN |
b1 |
b2 |
d16 |
Number of ribs |
e1 |
e2 ± 0,2 |
e3 ± 0,2 |
e4 |
f2 |
f3 |
l22 |
l23 |
l24 |
l25 |
|
Tolerances |
15 |
53 |
± 1 |
10,3 |
7 |
5 |
1,5 |
37 |
16 |
24,5 |
8 |
3 |
65 |
4 |
14,5 |
3 |
20 |
68 |
± 2 |
13,4 |
9,5 |
5 |
1,5 |
48 |
19 |
23 |
8 |
3 |
65 |
4 |
14 |
4 |
25 |
77 |
+ 3 − 2 |
13,4 |
9,5 |
5 |
1,5 |
58 |
19 |
23 |
8 |
3 |
65 |
4 |
14,5 |
4 |
32 |
86 |
13,4 |
9,5 |
5 |
2,5 |
65 |
20 |
20 |
8 |
3 |
75 |
5 |
14 |
5 |
40 |
101 |
17,3 |
12 |
6 |
2,5 |
75 |
28 |
25 |
10 |
4 |
90 |
5 |
17 |
5 |
50 |
111 |
17,3 |
12 |
6 |
2,5 |
86 |
28 |
36 |
10 |
4 |
100 |
6,5 |
18,5 |
5 |
Clamp dimensions |
Nominal size DN |
r1 |
r2 |
r3 |
r4 |
r5 |
Number of ribs |
|
Tolerances |
|
Tolerances |
|
Tolerances |
|
Tolerances |
|
Tolerances |
with r3 |
with r4 |
with r5 |
15 |
12,5 |
± 0,25 |
6,75 |
± 0,2 |
9,5 |
± 0,2 |
10 |
± 0,2 |
10,5 |
± 0,25 |
3 |
1 |
1 |
20 |
16,5 |
9,75 |
13,5 |
± 0,25 |
14 |
± 0,25 |
14,5 |
3 |
1 |
1 |
25 |
20 |
± 0,3 |
12,75 |
± 0,25 |
17 |
17,5 |
18 |
3 |
1 |
1 |
32 |
24,5 |
16,5 |
21,5 |
± 0,3 |
22 |
± 0,3 |
22,5 |
± 0,3 |
3 |
1 |
1 |
40 |
27,5 |
19,5 |
± 0,3 |
24,5 |
25 |
25,5 |
3 |
2 |
1 |
50 |
34,5 |
± 0,4 |
25,5 |
31 |
± 0,4 |
31,5 |
± 0,4 |
32 |
± 0,4 |
3 |
2 |
1 |
Clamp dimensions |
Nominal size DN |
r6 |
r7 |
r8 |
r9 |
r10 |
t1 |
t2 |
|
Tolerances |
15 |
14 |
± 0,25 |
1 |
1 |
4 |
0,5 |
5 |
10 |
20 |
18 |
1 |
1 |
5 |
0,5 |
5,5 |
11 |
25 |
21,5 |
± 0,3 |
1 |
1 |
5 |
0,5 |
6 |
12 |
32 |
26 |
2 |
3 |
6 |
1 |
6 |
12 |
40 |
29 |
2 |
3 |
6 |
1 |
7 |
17 |
50 |
35 |
± 0,4 |
2,5 |
3 |
6 |
1,3 |
7 |
17 |
The sizes of bolts and nuts to be used with clamps shall be in accordance with Table.
Bolts and nuts |
Nominal size DN |
Size of screw as in EN ISO 4762 |
Size of nuts as in EN ISO 4032 |
15 |
M6 × 20 |
M6 |
20 |
M8 × 25 |
M8 |
25 |
M8 × 25 |
M8 |
32 |
M8 × 25 |
M8 |
40 |
M10 × 40 |
M10 |
50 |
M10 × 40 |
M10 |
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