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STRAUB-OPEN-FLEX

With joint, slotted casing, 2-part or 3-part, STRAUB-OPEN-FLEX can be mounted easily and quickly on existing pipes. STRAUB-OPEN-FLEX pipe couplings have the same characteristics as STRAUB-FLEX couplings, but expand their possible uses. The casings of the STRAUB-OPENFLEX product series can be hinged or available as 2-part or 3-part version. As a result, STRAUB-OPENFLEX couplings can be used for connecting pipes or repairs without removal of existing pipes.
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STRAUB-OPEN-FLEX

OPEN-FLEX 1 ø 48.3 - 168.3 mm

adMm Clamping range [mm] PN industry [bar] PN shipbuilding [bar] B [mm] DV [mm] C (mm) X [mm] R without strip insert [mm] R with strip insert [mm] Torque rate [Nm]
48.3 47.0 - 50.0 25 16 75 70 35 89 5 15 7.5
54 52.5 - 55.5 25 16 75 76 35 94 5 15 7.5
57 55.5 - 58.5 25 16 75 79 35 97 5 15 7.5
60.3 59.0 - 63.0 25 16 75 82 35 101 5 15 7.5
73 71.5 - 75.0 25 16 94 95 51 119 5 25 10
76.1 74.5 - 77.5 25 16 94 98 51 123 5 25 10
84 82.5 - 85.5 25 16 94 106 51 131 5 25 10
88.9 87.5 - 90.5 25 16 94 111 51 136 5 25 10
100.6 99.0 - 102.5 25 16 94 123 51 148 5 25 10
101.6 100.0 - 103.5 25 16 94 124 51 148 5 25 10
104 102.5 - 105.5 20 16 94 126 51 152 5 25 10
104.8 103.0 - 106.5 20 16 94 127 51 152 5 25 10
108 106.5 - 110.0 20 16 94 130 51 156 5 25 10
114.3 112.5 - 116.0 20 16 94 136 51 162 5 25 10
118 116.0 - 120.0 20 16 94 140 51 166 5 25 10
127 125.0 - 129.0 20 16 107 149 62 179 5 35 12
129 127.0 - 131.0 20 16 107 151 62 181 5 35 12
130.2 128.5 - 132.0 20 16 107 152 62 181 5 35 12
133 131.0 - 135.0 16 16 107 155 62 189 5 35 12
139.7 138.0 - 141.5 16 16 107 162 62 192 5 35 12
141.3 139.5 - 143.0 16 16 107 163 62 192 5 35 12
154 152.0 - 156.0 16 16 107 176 62 207 5 35 12
159 157.0 - 161.0 16 16 107 181 62 212 5 35 12
168.3 166.0 - 170.5 16 16 107 190 62 225 5 35 12

OPEN-FLEX 2 ø 172.0 - 2032.0 mm

adMm Clamping range [mm] PN shipbuilding [bar] 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
172 170 - 174 Druckwerte gemäss Typen-Zulassung W2 | W5 W2 | W5 W2 | W5 - - -
180 178 - 182 Druckwerte gemäss Typen-Zulassung W2 | W5 W2 | W5 W2 | W5 W2 | W5 W2 | W5 W2 | W5
200 198 - 202 Druckwerte gemäss Typen-Zulassung W2 | W5 W2 | W5 W2 | W5 W2 | W5 W2 | W5 W2 | W5
219.1 217 - 222 Druckwerte gemäss Typen-Zulassung W2 | W5 W2 | W5 W2 | W5 W2 | W5 W2 | W5 W2 | W5
250 248 - 253 Druckwerte gemäss Typen-Zulassung W2 | W5 W2 | W5 W2 | W5 W2 | W5 W2 | W5 W2 | W5
267 264 - 270 Druckwerte gemäss Typen-Zulassung W2 | W5 W2 | W5 W2 | W5 W2 | W5 W2 | W5 W2 | W5
273 270 - 276 Druckwerte gemäss Typen-Zulassung W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W2 | W5
304 301 - 307 Druckwerte gemäss Typen-Zulassung W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W5
323.9 321 - 327 Druckwerte gemäss Typen-Zulassung W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W5
355.6 353 - 358 Druckwerte gemäss Typen-Zulassung W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 | W5
406.4 404 - 409 Druckwerte gemäss Typen-Zulassung W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 | W5
457.2 454 - 460 Druckwerte gemäss Typen-Zulassung W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 | W5 W1 | W5
508 505 - 511 Druckwerte gemäss Typen-Zulassung W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 | W5 W1 | W5
558.8 556 - 562 Druckwerte gemäss Typen-Zulassung W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 | W5 W1
609.6 606 - 613 Druckwerte gemäss Typen-Zulassung W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 | W5 W1
711.2 708 - 715 Druckwerte gemäss Typen-Zulassung W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 W1
762 758 - 766 Druckwerte gemäss Typen-Zulassung W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 | W5 W1 -
812.8 809 - 817 Druckwerte gemäss Typen-Zulassung W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 | W5 W1 -
914.4 910 - 918 Druckwerte gemäss Typen-Zulassung W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 W1 -
1016 1012 - 1020 Druckwerte gemäss Typen-Zulassung W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 W1 -
1117.6 1114 - 1122 Druckwerte gemäss Typen-Zulassung W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 - -
1219.2 1215 - 1224 Druckwerte gemäss Typen-Zulassung W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 - -
1320.8 1316 - 1325 Druckwerte gemäss Typen-Zulassung W1 | W2 | W5 W1 | W5 W1 W1 - -
1422.4 1418 - 1427 Druckwerte gemäss Typen-Zulassung W1 | W2 | W5 W1 | W5 W1 W1 - -
1524 1519 - 1529 Druckwerte gemäss Typen-Zulassung W1 | W2 | W5 W1 | W5 W1 - - -
1600 1595 - 1605 Druckwerte gemäss Typen-Zulassung W1 | W2 | W5 W1 | W5 W1 - - -
1625.6 1621 - 1631 Druckwerte gemäss Typen-Zulassung W1 | W2 | W5 W1 | W5 W1 - - -
1727.2 1722 - 1732 Druckwerte gemäss Typen-Zulassung W1 | W2 | W5 W1 | W5 W1 - - -
1828.8 1824 - 1834 Druckwerte gemäss Typen-Zulassung W1 | W2 | W5 W1 | W5 W1 - - -
1930.4 1925 - 1935 Druckwerte gemäss Typen-Zulassung W1 | W2 | W5 W1 | W5 W1 - - -
2032 2027 - 2037 Druckwerte gemäss Typen-Zulassung W1 | W2 | W5 W1 | W5 W1 - - -

OPEN-FLEX 3 ø 219.1 - 2032.0 mm

adMm Clamping range [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
219.1 216 - 222 W2 | W5 W2 | W5 W2 | W5 W2 | W5 - -
250 247 - 253 W2 | W5 W2 | W5 W2 | W5 W2 | W5 W1 | W5 W1 | W5
267 264 - 270 W2 | W5 W2 | W5 W2 | W5 W2 | W5 W1 | W5 W1 | W5
273 270 - 276 W2 | W5 W2 | W5 W2 | W5 W2 | W5 W1 | W5 W1 | W5
304 301 - 307 W2 | W5 W2 | W5 W2 | W5 W2 | W5 W1 | W5 W1 | W5
323.9 321 - 327 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 | W5
355.6 352 - 358 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 | W5 W1 | W5
406.4 403 - 409 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 | W5 W1 | W5
457.2 454 - 460 W1 | W2 | W5 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 | W5 W1 | W5
508 504 - 512 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 | W5 W1 | W5 W1 | W5*
558.8 555 - 562 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 | W5 W1 | W5 W1 | W5*
609.6 606 - 613 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 | W5 W1 | W5 W1 | W5*
711.2 707 - 715 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 | W5 W1 | W5* W1 | W5*
762 758 - 766 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 | W5 W1 | W5* W1 | W5*
812.8 809 - 817 W1 | W2 | W5 W1 | W2 | W5 W1 | W5 W1 | W5 W1 | W5* W1 | W5*
914.4 910 - 918 W1 | W2 | W5 W1 | W5 W1 | W5 W1 | W5* W1 | W5* W1 | W5*
1016 1012 - 1020 W1 | W2 | W5 W1 | W5 W1 | W5 W1 | W5* W1 | W5* W1*
1117.6 1113 - 1122 W1 | W2 | W5 W1 | W5 W1 | W5 W1 | W5* W1 | W5* W1*
1219.2 1215 - 1224 W1 | W2 | W5 W1 | W5 W1 | W5 W1 | W5* W1* W1*
1320.8 1316 - 1325 W1 | W2 | W5 W1 | W5 W1 | W5 W1 | W5* W1* W1*
1422.4 1418 - 1427 W1 | W2 | W5 W1 | W5 W1 | W5* W1 | W5* W1* -
1524 1519 - 1529 W1 | W2 | W5 W1 | W5 W1 | W5* W1* W1* -
1600 1595 - 1605 W1 | W2 | W5 W1 | W5 W1 | W5* W1* W1* -
1625.6 1621 - 1631 W1 | W2 | W5 W1 | W5 W1 | W5* W1* W1* -
1727.2 1722 - 1732 W1 | W2 | W5 W1 | W5 W1 | W5* W1* W1* -
1828.8 1824 - 1834 W1 | W2 | W5 W1 | W5 W1 | W5* W1* - -
1930.4 1925 - 1935 W1 | W2 | W5 W1 | W5 W1 | W5* W1* - -
2032 2027 - 2037 W1 | W2 | W5 W1 | W5 W1 W1* - -
2268 2263 - 2273 W1 | W5 W1 | W5 W1 W1* - -
2540 2535 - 2545 W1 | W5 W1 | W5* W1 - - -
2794 2789 - 2799 W1 | W5 W1 | W5* W1* - - -
3048 3043 - 3053 W1 | W5 W1 - - - -
3302 3296 - 3308 W1 | W5 W1 - - - -
3556 3548 - 3562 W1 | W5 W1 - - - -
3810 3804 - 3816 W1 W1 - - - -
4064 4058 - 4070 W1 W1 - - - -

OPEN-FLEX 3.5 ø 323.9 - 1219.2 mm

adMm Clamping range [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
323.9 320 - 327 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W1 | W5
355.6 352 - 359 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W1 | W5
406.4 402 - 410 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W1 | W5
457.2 453 - 461 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W1 | W5
508 504 - 512 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W1 | W5
558.8 555 - 563 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W5*
609.6 605 - 614 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W5*
655 651 - 659 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W5* W5*
711.2 707 - 715 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W5* W5*
762 758 - 766 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W5* W5*
812.8 809 - 817 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W5* W5*
914.4 910 - 918 W1 | W5 W1 | W5 W1 | W5 W5* W5* W5*
1016 1011 - 1021 W1 | W5 W1 | W5 W1 | W5 W5* W5* -
1117.6 1112 - 1123 W1 | W5 W1 | W5 W1 | W5 W5* W5* -
1219.2 1214 - 1224 W1 | W5 W1 | W5 W1 | W5 W5* - -
1320.8 1316 - 1325 W1 | W5 W1 | W5 W1 | W5* W5* - -
1422.4 1417 - 1427 W1 | W5 W1 | W5 W5* - - -
1524 1519 - 1529 W1 | W5 W1 | W5 W5* - - -
1600 1595 - 1605 W1 | W5 W1 | W5 W5* - - -
1625 1620 - 1630 W1 | W5 W1 | W5 W5* - - -
1727.2 1722 - 1732 W1 | W5 W1 | W5 W5* - - -
1828.8 1824 - 1834 W1 | W5 W1 | W5 W5* - - -
1930.4 1925 - 1935 W1 | W5 W1 | W5* W5* - - -
2032 2026 - 2038 W1 | W5 W1 | W5* W5* - - -
2268 2262 - 2274 W1 | W5 W1 | W5* - - - -
2540 2534 - 2546 W1 | W5 W5* - - - -
2794 2788 - 2800 W1 | W5 W5* - - - -
3048 3042 - 3054 W1 | W5 - - - - -
3302 3296 - 3308 W1 - - - - -
3556 3550 - 3562 W1 - - - - -
3810 3804 - 3816 W1 - - - - -
4064 4058 - 4070 W1 - - - - -

OPEN-FLEX 4 ø 323.9 - 812.8 mm

adMm Clamping range [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
323.9 320 - 327 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W1 | W5
355.6 352 - 359 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W1 | W5
406.4 403 - 409 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W1 | W5
457.2 454 - 460 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W1 | W5
508 505 - 512 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W1 | W5*
558.8 555 - 562 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W5*
609.6 606 - 613 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W5*
655 652 - 658 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W5* W5*
711.2 707 - 715 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W5* W5*
762 758 - 766 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W5* W5*
812.8 809 - 817 W1 | W5 W1 | W5 W1 | W5 W1 | W5 W5* W5*
914.4 910 - 918 W1 | W5 W1 | W5 W1 | W5 W5* W5* -
1016 1012 - 1020 W1 | W5 W1 | W5 W1 | W5 W5* W5* -
1117.6 1113 - 1122 W1 | W5 W1 | W5 W1 | W5 W5* - -
1219.2 1215 - 1224 W1 | W5 W1 | W5 W1 | W5 W5* - -
1320.8 1316 - 1325 W1 | W5 W1 | W5 W1 | W5* - - -
1422.4 1418 - 1427 W1 | W5 W1 | W5 W5* - - -
1524 1519 - 1529 W1 | W5 W1 | W5 W5* - - -
1600 1595 - 1605 W1 | W5 W1 | W5 W5* - - -
1625 1621 - 1631 W1 | W5 W1 | W5 W5* - - -
1727.2 1722 - 1732 W1 | W5 W1 | W5 W5* - - -
1828.8 1824 - 1834 W1 | W5 W1 | W5 W5* - - -
1930.4 1925 - 1935 W1 | W5 W1 | W5 W5* - - -
2032 2027 - 2037 W1 | W5 W1 | W5* - - - -
2268 2263 - 2273 W1 | W5 W1 | W5* - - - -
2540 2535 - 2545 W1 | W5 W5* - - - -
2794 2798 - 2799 W1 | W5 W5* - - - -
3048 3043 - 3053 W1 | W5 - - - - -
3302 3296 - 3308 W1 | W5 - - - - -
3556 3548 - 3562 W1 - - - - -
3810 3804 - 3816 W1 - - - - -
4064 4058 - 4070 W1 - - - - -

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.

OPEN-FLEX 1 ø 48.3 - 168.3 mm

Components W1 W2 W5
- AISI 316 L or similar AISI 316 L or similar
- AISI 4135 A4 - 80
- AISI 12L14, galvanised AISI 316 L
- AISI 316 L or similar / VDF AISI 316 L or similar / PVDF
Sealing sleeve Temperatur Medium

OPEN-FLEX 2 ø 172.0 - 2032.0 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 / HDPE AISI 316 L or similar / HDPE AISI 316 L or similar / HDPE
Sealing sleeve Temperatur Medium

OPEN-FLEX 3 ø 219.1 - 2032.0 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 / HDPE AISI 316 L or similar / HDPE AISI 316 L or similar / HDPE
Sealing sleeve Temperatur Medium

OPEN-FLEX 3.5 ø 323.9 - 1219.2 mm

Components W1 W2 W5
S355MC, hot-dip galvanised - S32101 (LDX)
AISI 4135 - A4 - 80
AISI 12L14, galvanised - AISI 316 L or similar
AISI 316 L or similar / HDPE - AISI 316 L or similar / HDPE
Sealing sleeve Temperatur Medium

OPEN-FLEX 4 ø 323.9 - 812.8 mm

Components W1 W2 W5
S355MC, hot-dip galvanised - S32101 (LDX)
AISI 4135 - A4 - 80
AISI 12L14, galvanised - AISI 316 L or similar
AISI 301 / HDPE - AISI 316 L or similar / HDPE
Sealing sleeve Temperatur Medium