May 2005

High-pressure hoselines Hoses

2 SN 4 SP 4SH heat protection hose HSS SN 757

Dimensions in mm

1 Field of application The hoses of this standard can be used for high-pressure hydraulic systems operating on mineral-oil basis and with water-glycol emulsion, and for light fuel oils, lubricating oils, water and air. In air systems application only up to a max. pressure of 50 bar. The hoselines are suitable for the temperature range from -40 C to +100 C. 1.1 Field of application of heat protection hose HSS The heat protection hose offers protection against liquid metal splashes, weld sparks, and in short-time exposure to flames and at high temperatures. The external silicone coating makes the hose resistant to oil, water and many solvents. Lasting protection at high temperatures can be achieved only with sufficient air volume between the line to be protected and the heat protection hose. This fact has been taken into account in the assignment of the heat protection hose to the hoseline as in SN 756. The heat protection hoses are so dimensioned that they have to be installed prior to the installation of the hose fittings. The heat protection hose is fastened with a hose clamp as in DIN 3017. If the protection hose is put over the hoseline subsequently, the width across corners of the union nut and the diameter of the SAE collar must be taken into account when the heat protection hose is specified. (Table on page 4) Then the heat protection hose is fastened on the hoseline tip with only one pipe clamp as in DIN 3017 on one end of the hoseline to enable air circulation between protection hose and hoseline. 2 Dimensions and designations

2 SN hoses from DN 6 to DN 8 (according to DIN EN 853)

Designation of a hose for high-pressure hoselines (H) of nominal diameter DN 8 and a length of 500 mm:

Hose SN 757 - H 8 x 500

Continued on pages 2 to 4

Bearbeitet: Normung

The reproduction, distribution and utilization of this document as well as the disclosure of its content to others without prior explicit written consent of SMS Demag AG is prohibited. Holder has to protect this document against unauthorized withdrawal of third parties. Offenders will be held liable for the payment of damages.

All rights reserved in case of patent/utility model/trademark protection. 18.07.02

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Page 2 SN 757 : 2005-05

4 SP hoses from DN 12 to DN 20 (as in DIN EN 856) 4 SH hoses from DN 25 to DN 40 (as in DIN EN 856)

Designation of a hose for high-pressure hoselines (4H) of nominal width DN 20 and a length of 500 mm:

Hose SN 757 - 4H 20 x 500 Heat protection hose (HSS)

Designation of a heat protection hose of size 25 (HSS 25) for a hoseline of nominal diameter DN 8 and a length of 500 mm:

Heat protection hose SN 757 - HSS 25 x 500

l

inner tube outer tube

wire braid reinforcement

Page 3 SN 757 : 2005-05

3 Technical data

2SN Operating pressure

bar Type DN

d1 min.

d2

d3 max. dynamic static

Bending radius

rmin

Weight kg/m

H 6 6 6,2 12,7 15,7 400 640 100 0,35

H 8 2SN

8 7,7 14,3 17,3 350 560 115 0,40

4SP- and 4SH

Operating pressure bar Type DN

d1

min. d2

d3

max. dynamic static

Bending radius

rmin

Weight kg/m

4H12 12 12,3 20,2 25,9 415 660 230 0,87

4H16 16 15,5 23,8 29,0 350 500 250 1,19

4H20

4SP

20 (19) 18,6 28,2 33,0 350 500 300 1,49

4SH25 25 25,0 35,2 39,9 380 550 340 2,08

4SH32 32 (31) 31,4 41,9 47,1 350 500 460 2,51

4SH40

4SH

40 (38) 37,7 48,8 55,1 290 420 560 3,42

Supplier: Interhydraulik Gesellschaft fr Hydraulikkomponenten mbH 59379 Selm, Germany Heat protection hose (HSS)

HSS size d1 d2 For

hoseline as in SN 756

Outside diameter of hoseline tip

Required hose clamp

DIN 3017- A W4

Weight kg/m

HSS 22 22 29 DN 6 22 25 - 40 x 9 0,26

HSS 25 25 32 DN 8 24 25 - 40 x 9 0,27

HSS 30 30 37 - - - 0,30

HSS 35 35 42 DN 12 30 30 - 45 x 9 0,32

HSS 40 40 47 DN 16 33 30 - 45 x 9 0,35

HSS 40 40 47 DN 20 (19) 38 40 - 60 x 9 0,35

HSS 50 50 57 DN 25 46 40 - 60 x 9 0,44

HSS 60 60 67 DN 32 (31) 56 50 - 70 x 9 0,49

HSS 70 70 77 DN 40 (38) 64 60 - 80 x 9 0,54

HSS 80 80 87 - - - 0,59

HSS 90 90 97 - - - 0,63

HSS 100 100 107 - - - 0,67

Material and technical data: Inner hose: Calcium-silicate yarn or glass filament yarn, braided, woven or knitted, approx. 2 mm thick. Outer coat: Silicone coat approx. 1.5 mm

Thermal resistance: Permanent exposure: up to +260C exposure for 15 to 20 minutes up to +1,000C exposure for 15 to 30 seconds up to +1,500 C

Suppliers: Lippmann GmbH Type: Protector Vigot GmbH Type: F 88SC Alfons Merkel GmbH Type: Marsotex Aeroquip Type: 624

Page 4 SN 757 : 2005-05 HSS Data for subsequent fitting of the heat protection hose on finished hoselines

Hoseline as in SN 756

DN

Width across

corners of union nut

of SAE collar

HSS size

Required hose clamp DIN 3017- A .W4

6 25,5 - HSS 30 25-40 x 9

8 27,8 - HSS 30 25-40 x 9

12 34,7 31,7 HSS 35 30-45 x 9

16 - 31,7 HSS 35 30-45 x 9

16 41,6 - HSS 50 30-45 x 9

20 (19) - 41,3 HSS 50 40-60 x 9

20 (19) 53,2 - HSS 60 40-60 x 9

25 - 47,6 HSS 50 40-60 x 9

25 57,8 - HSS 60 40-60 x 9

32 (31) 69,3 63,5 HSS 70 50-70 x 9

40 (38) - 63,5 HSS 70 60-80 x 9

40 (38) 92,4 - HSS 100 60-80 x 9

4 Referenced standards SN 756 High-pressure hoselines

DIN 3017-1 Hose clamps with worm gear drive, shape A

DIN EN 853 Hydraulic hoselines with wire braid reinforcement DIN EN 856 Hydraulic hoselines with spiral wire reinforcement 5 Further standards SN 532-1 SAE flanges with flanged welding neck, 3000 PSI and 6000 PSI; flanged joint, flange coupling SN 532-2 SAE flange, semiflanges, solid flange, flanged welding necks, blind collar SN 544-1 Low-pressure hoselines; NA, NB, NE, NF, NG SN 544-2 Low-pressure hoselines; hoses SN 544-3 Low-pressure hoselines; hose fittings SN 544-4 Low-pressure hoselines; double nipple, welding nipple SN 758 High-pressure hoselines; hose fittings, types A to G SN 759 High-pressure hoselines; male studs, weld-on sockets Revision of May 2005 Previous editions Revision of HSS assignment to SN 543 Sh. 2: 2: 1965-05; hoselines DN 12 and DN 16. SN 757: 1967-09; 1971-09; 1975-09; Incorporation of hose clamps. 1978-01; 1989-01; 1994-04; 1998-02; 2002-07; 2003-11