Clamp type coupling NF EN 14423

Clamp 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.



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



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


For 1 to 5 see Table a : Connector end b : Tail end
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
	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	15 20 25 32 40 50		110 115 115 125 140 155
	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
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.


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

Connectors

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Hose fittings with weld-neck collar (for loose flanges) (FL)

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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
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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Hose fittings with weld-neck flange (FV)

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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 connections

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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
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

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Hose fittings with union nut, thread according to EN ISO 228-1

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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
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	4	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		25	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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Hose fittings with tapered male thread

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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
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.
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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Hose fittings with coned end

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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
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.
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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Hose fittings with stud end

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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
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

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
Nominal size DN		Tolerances	b2	d16	Number of ribs	e1	e2 ± 0,2	e3 ± 0,2	e4	f2	f3	l22	l23	l24	l25
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