INNER LINER PU WEAR-RESISTANT HOSE

The liner material and the erosion it survives. This one is polyurethane, published for super high wear resistance, on two bores of 19 mm and 25 mm at 20 bar with 60 bar burst behind it.

On wear duty, usually yes — polyurethane is the tougher liner against particle impact, and this one is published at 20 bar on both the 19 mm and 25 mm bores. Where the medium is chemically aggressive rather than abrasive, a polyethylene liner is the better part, so the medium should be checked before the two are swapped.

20 bar working with 60 bar minimum burst on a 19 mm bore, a 38 mm outside diameter and a 61 m length — the smaller of the two codes.

The same 20 bar against 60 bar burst, on a 25 mm bore with a 44 mm outside diameter and a 61 m length. Only the bore changes between the two codes.

Those are the published media, along with mineral powder, coal powder and granular material. The liner is built for particle erosion, and both 19 mm and 25 mm codes carry the same 20 bar rating for it.

Yes — the published duty is suction and transport. On the 19 mm code the 38 mm outside diameter gives the wall that resists both the collapse load and the impact of the solids arriving at the intake.

Because the wall is a design decision, not a function of bore. A 38 mm outside on the 19 mm bore and a 44 mm outside on the 25 mm bore give the same wall on both, so the buyer chooses a bore and gets the same wear allowance either way, and the 61 m coil is the same on both codes as well.

Usually because the hose was run above 20 bar or outside its service window, which softens the bond before it wears the liner. The 60 bar burst is a margin, not a working figure, and the liner is the first thing to lift when the margin is used up.

One length from the 61 m coil, in either the 19 mm or the 25 mm code. Cut lengths and crimped assemblies are quoted per piece, both codes ship on the same coil length, and a spare metre is worth keeping because the liner wears from the inside where it cannot be seen.

Per metre by bore: the 19 mm code at 38 mm outside and the 25 mm code at 44 mm outside, both on 61 m coils. Send bore, total length, medium and destination for a firm figure, with the assembly tested before it ships and the liner grade confirmed against the solids in the line.