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Clamp type coupling NF EN 14423Clamp type coupling assemblies for use with steam hoses rated for pressures up to 18 bar |
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
Steam hose coupling
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 |
Coupling assembly
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For 1 to 5 see Table |
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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 |
Types of connectors
Illustration | Type | Description | Nominal size DN |
Thread size | L1 ≈ mm |
Details |
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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 |
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FV | PN 40 weld-neck flange as in EN 1092-1 |
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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 |
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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. |
Tail end fittings
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 |
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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 |
Connectors
The weld-neck collar may either be integral to the tail end fitting or welded to it. |
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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 : |
Weld-neck flange PN 40 |
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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 : |
Welding weld-neck collars to the tail end is optional for type FL fittings.
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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. a : Tail end fitting |
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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 : EXAMPLE 2 : |
A hose fitting with tapered male thread (Type R) is shown in Figure. 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 : |
A hose fitting with coned end (Type RI) is shown in Figure. 1 : Cone end |
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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 : |
A hose fitting with stud end (Type RA) is shown in Figure. 1 : Main gasket |
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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 : |
Clamps
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 |
Bolts and nuts
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 |