STEEL WIRE SPIRAL HYDRAULIC HOSE EN856 4SH

4SH, unless 280 bar is enough. At 25 mm bore 4SH is rated 38.0 MPa (380 bar) with 152 MPa burst, while 4SP is rated 28.0 MPa (280 bar) with 112 MPa. The bend radius is 340 mm on both and the weight is 2.12 kg/m against 2.07 kg/m, so 4SH costs almost nothing in handling and buys 100 bar.

No. At 32 mm bore the best row in this table is the 4SH-20-31.5T at 35.0 MPa (350 bar) with 140 MPa burst; the standard 4SH-20-31.5 row is 32.5 MPa. A 420 bar circuit at that bore moves up to a six-spiral body, which is where we quote next. At 3/4 inch, 42.0 MPa is available and 420 bar fits.

The 4SH-12-19 code, 19 mm bore held between 18.6 and 19.8 mm, is rated 42.0 MPa working, 6,092 psi, with 168 MPa (1,680 bar) minimum burst. Minimum bend radius is 280 mm and the body weighs 1.64 kg/m, so 100 m is a 164 kg coil.

The 4SH-32-51 code, 51 mm bore, is rated 25.0 MPa (250 bar) with 100 MPa (1,000 bar) minimum burst, 3,626 psi working. Bend radius is 700 mm and mass is 5.06 kg/m, which is why a 2 inch run needs support rather than a longer loop.

Only the 3/4 inch code reaches it: 42.0 MPa at 19 mm bore. At 1 inch the rating falls to 38.0 MPa (380 bar), so a 400 bar setting rules that bore out even though the flow would prefer it. That single row decides the whole hose schedule on a 400 bar press.

The published windows are -40 to +100 ℃ on oil and 0 to +70 ℃ on water-based media. On HFC the 70 ℃ ceiling arrives before the pressure limit does, so a line running at 42.0 MPa on oil is still temperature-bound on water-based fluid.

Because one bore can carry two ratings: 4SH-20-31.5 at 32.5 MPa and 4SH-20-31.5T at 35.0 MPa, both on a 31.4 to 33.0 mm bore at 2.77 kg/m with a 460 mm bend radius. The marking on the body tells you which one is in the rack, and a 340 bar line fitted with the 32.5 MPa row is a burst waiting on a relief setting.

Heat reaches the cover from outside as well as through the tube, and a cover held above its limit blisters before the wire fails. The working window tops out at +100 ℃ on oil. Where a line runs near that, add guarding or move the run away from the manifold rather than ordering a heavier hose.

YIBO, in Luohe, Henan, winds the 4SH range on the same line as the 4SP: 6 codes from 19 mm to 51 mm bore, 3/4 inch to 2 inch, starting at 4SH-12-19. Coils and crimped assemblies ship from one plant, loading through Qingdao or Shanghai.

The 2 inch code is 5.06 kg/m, so 100 m is a 506 kg coil and takes a different freight line from the 3/4 inch code at 1.64 kg/m. Send bore, length, ends and destination, and the price comes back the same working day.