The print gives the hose
EN 853 2SN DN12 is a two-wire-braid hose with a 1/2 in bore. SAE 100R2AT is its SAE counterpart; spiral hoses are EN 856 4SP, 4SH, R12 and R13.
Reference tool — not inspection
Describe the hose assembly before it goes in an RFQ.
Hose assembly
Hose, size, ends, length.
Type the print on the hose or choose the type and size, then both ends. Below the examples, the print of an offered hose can be checked against it: size and type. The line updates with every change.
Examples:
Replacement check
On the prints alone: the maker’s pressure rating and the hose fittings decide.
All 130 engineering tools
A hose assembly is ordered by four things: the hose type, its size, the two end fittings and the length. The print on the hose gives the first two — EN 853 2SN DN12, for example — and the ends are read from the fittings themselves. Fill them in, and the tool writes them as one line with the thread of each end.
Sizes are nominal: DN, inch and dash number name the same bore (DN12, 1/2 in, -8). Pressure ratings are not given here, because they differ by maker and size, so state the working pressure and the fluid in the request.
How a hose is read
Print, size, ends.
DN, inch and dash are one size
DN12, 1/2 in and -8 name the same nominal bore. The dash number counts sixteenths of an inch: -12 is 3/4 in, DN19.
The ends decide the fit
A -8 hose can end in a JIC 3/4-16 nut, an ORFS 13/16-16 nut, a BSP G 1/2 nut or a metric 24° cone nut. When a fitting is not marked, read its thread with the thread identifier.
| DN | Inch | Dash | Bore, mm | JIC 37° | ORFS | BSP |
|---|---|---|---|---|---|---|
| DN5 | 3/16 | -3 | 4.8 | — | — | — |
| DN6 | 1/4 | -4 | 6.3 | 7/16-20 | 9/16-18 | G 1/4 |
| DN8 | 5/16 | -5 | 7.9 | 1/2-20 | — | — |
| DN10 | 3/8 | -6 | 9.5 | 9/16-18 | 11/16-16 | G 3/8 |
| DN12 | 1/2 | -8 | 12.7 | 3/4-16 | 13/16-16 | G 1/2 |
| DN16 | 5/8 | -10 | 15.9 | 7/8-14 | 1-14 | G 5/8 |
| DN19 | 3/4 | -12 | 19.0 | 1 1/16-12 | 1 3/16-12 | G 3/4 |
| DN25 | 1 | -16 | 25.4 | 1 5/16-12 | 1 7/16-12 | G 1 |
| DN31 | 1 1/4 | -20 | 31.8 | 1 5/8-12 | 1 11/16-12 | G 1 1/4 |
| DN38 | 1 1/2 | -24 | 38.1 | 1 7/8-12 | 2-12 | G 1 1/2 |
| DN51 | 2 | -32 | 50.8 | 2 1/2-12 | — | G 2 |
Bores are nominal: the standards give each size a tolerance band. The BSP thread is the usual pairing for a hose of the same size.
Sources
Sizes: the dash number is the nominal bore in sixteenths of an inch; the DN and inch pairs follow Mittaletku’s EN 853 range, matching Hansa-Flex and Parker listings. Hose types and their SAE counterparts (1SN with 100R1AT, 2SN with 100R2AT): Balflex’s cross-reference index and distributors’ catalogues. End threads: JIC 37° (SAE J514) and ORFS (SAE J1453) per the thread charts of Engine Oil Journal and Hose and Fittings; metric 24° cones per the ISO 8434-1 table, checked against DICSA’s and Parker’s EO catalogues.
Before you send the hose
Questions about hoses in an RFQ
What does EN 853 2SN DN12 mean?
A hose to EN 853, type 2SN (two steel wire braids), with a nominal bore of DN12, which is 1/2 in or dash -8. SAE 100R2AT is its SAE counterpart. The working pressure depends on the maker and the size; take it from the hose maker’s data.
Is -8 the same as DN12?
Yes, as a nominal hose size: the dash number counts sixteenths of an inch, so -8 is 1/2 in, DN12. It is not a thread size: a -8 JIC end has a 3/4-16 thread and a -8 O-ring face seal end 13/16-16.
How is the length of a hose assembly given?
Usually overall, from the end of one fitting to the end of the other with the hose laid straight; for an elbow, makers measure to the centre line of its sealing face. Say in the request which length you give.
What is the orientation of the ends?
With two bent fittings, the angle between them seen along the hose, measured clockwise from end 1. A wrong orientation twists the hose when it is fitted, so give it whenever both ends are bent.
What if the ends are not marked?
Measure the thread across the crests and count the threads; the thread identifier names it, with its dash size or the 24° cone tube it belongs to. Send photographs of both ends and the hose print with the request.
Hose described?
Send the line with the photographs.
A built line is a cross-check on the print and the measurements, not proof. Attach photographs of both ends and the print, give the working pressure and the fluid, and Vessel Core checks them against each other before an offer goes back.
Buyer tools
