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Non-tension resistant pipe coupling

STRAUB-STEP-FLEX

STRAUB-STEP-FLEX is used if the pipes have different external diameters. The possible diameter differences of the pipes to be connected can be 10 mm up to max. 30 mm. Under pressure, STRAUB-STEP-FLEX pipe couplings, due to the diameter differences, are always pushed by internal forces in the direction of the smaller pipe diameter and must therefore be secured against slipping using appropriate measures.
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STRAUB-STEP-FLEX

STEP-FLEX 2 ø 219.1 - 812.8 mm

adMm OD 2 [mm] OD 2 max [mm] PN Industry [bar] 25 PN Industry [bar] 6 PN Industry [bar] 10 PN Industry [bar] 16 PN Industry [bar] 20 PN Industry [bar] 2.5
219.1 230 250 W2 | W5 W2 | W5 W2 | W5 W2 | W5 W2 | W5 W2 | W5
250 260 280 W2 | W5 W2 | W5 W2 | W5 W2 | W5 W2 | W5 W2 | W5
267 277 297 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W5
273 283 303 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W5
304 314 334 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W5
323.9 334 354 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 | W5
355.6 366 386 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 | W5
406.4 416 436 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 | W5 W1 | W5
457.2 467 487 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 | W5 W1 | W5
508 518 538 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 | W5 W1 | W5
558.8 569 589 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 | W5 W1
609.6 620 640 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 | W5 W1
711.2 721 741 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 W1
762 772 792 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 | W5 W1 W1
812.8 823 843 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 | W5 W1 -
Remarks:
- Follow fitting instructions
- PN = working pressure considering the application loads
- Test pressure = PN x 1.5 (for example industry, water supply etc.)
- Stainless steel strip insert included
- Additional sealing sleeves, pressure and temperature ranges on request

STEP-FLEX 3 ø 914.4 - 2032.0 mm

adMm OD 2 [mm] OD 2 max [mm] PN Industry [bar] 25 PN Industry [bar] 6 PN Industry [bar] 10 PN Industry [bar] 16 PN Industry [bar] 20
914.4 924 934 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 W1
1016 1026 1046 W1 | W2 | W5 W1 | W5 W1 | W5 W1 W1
1117.6 1127 1147 W1 | W2 | W5 W1 | W5 W1 | W5 W1 -
1219.2 1229 1249 W1 | W2 | W5 W1 | W5 W1 | W5 W1 -
1320.8 1331 1351 W1 | W2 | W5 W1 | W5 W1 | W5 W1 -
1422.4 1432 1452 W1 | W2 | W5 W1 | W5 W1 W1 -
1524 1534 1554 W1 | W2 | W5 W1 | W5 W1 - -
1600 1610 1630 W1 | W2 | W5 W1 | W5 W1 - -
1625.4 1635 1655 W1 | W2 | W5 W1 | W5 W1 - -
1727.2 1737 1757 W1 | W2 | W5 W1 | W5 W1 - -
1828.8 1839 1859 W1 | W2 | W5 W1 | W5 W1 - -
1930.4 1940 1960 W1 | W2 | W5 W1 | W5 W1 - -
2032 2042 2062 W1 | W2 | W5 W1 | W5 W1 - -
Remarks:
- Follow fitting instructions
- PN = working pressure considering the application loads
- Test pressure = PN x 1.5 (for example industry, water supply etc.)
- Stainless steel strip insert included
- Additional sealing sleeves, pressure and temperature ranges on request

STRAUB pipe couplings are made of the same or different materials depending on the diameter and size. The following overview shows the details. If you have any questions, please contact our application technology department.

STEP-FLEX 2 ø 219.1 - 812.8 mm

Components W1 W2 W5
S355MC, hot-dip galvanised AISI 316 L or similar AISI 316 L or similar
AISI 4135 AISI 4135 A4 - 80
AISI 12L14, galvanised AISI 12L14, galvanised AISI 316 L or similar
AISI 316 L or similar AISI 316 L or similar AISI 316 L or similar
Sealing sleeve Temperatur Medium

STEP-FLEX 3 ø 914.4 - 2032.0 mm

Components W1 W2 W5
S355MC, hot-dip galvanised AISI 316 L or simiIar AISI 316 L or similar
AISI 4135 AISI 4135 A4 - 80
AISI 12L14, galvanised AISI 12L14, galvanised AISI 316 L or similar
AISI 316 L or similar AISI 316 L or similar AISI 316 L or similar
Sealing sleeve Temperatur Medium