4. STRAUB-GRIP 4-e.pdf · Technical Manual 3/03 Page 26 STRAUB-GRIP 4. STRAUB-GRIP 4.1...

Technical Manual 3/03 Page 26

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4. STRAUB-GRIP

4.1 STRAUB-GRIP-L

Joins any metal pipe, with pull-out resistance up to 46 bar / 670 psi STRAUB-GRIP-L is the ideal pipe jointfor shipbuilding, water and waste water treatment plants, industrial process pipework and many otherapplications. Whether pressure or suction lines, all piping systems are installed quickly, safely andeconomically with STRAUB-GRIP-L.

Metricw Working pressure up to 46 barw Outside diameters 26.9 up to 609.6 mmw Temperature range -20°C up to +80°Cw 100% Stainless Steel Constructionw Example for order:

STRAUB-GRIP-L 273.0, EPDM, ES

Fast ferry „Corsaire 6000“STRAUB-GRIP-L at CuNiFe sea water system

On average 3’000 couplings per shipin diameters 48.3 - 219.1 mm/11/2“ - 8“:

Weight savings in comparison toflange: 24 Tons

Weight savings in comparison toother couplings: 2.1 Tons

Benefits:

- More payload- Lower transport costs- Easy fitting

Imperialw Working pressure up to 670 psiw Outside diameters 3/4 up to 24 inchw Temperature range -4°F up to +176°Fw 100% Stainless Steel Constructionw Example for order:

STRAUB-GRIP-L 10“, EPDM, ES

Technical Manual 3/03 7

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4.1.1 Metric Specification STRAUB-GRIP-L Ø 26.9 - 219.1 mm

Right of alteration reserved.

Legend: - W1 - W5 according to DIN Standard 86128 (ASTM F1476 / F1548, ISO/NP-15837 / 15838).- PS: Working pressure considering the applications loads.- PN: Nominal pressure, includes four times safety factor, for applications that require authorisation of classification

societies (e.g. ABS, DNV, etc.).Remarks: - Follow fitting / disassembly instructions. Test pressure = 1,5 x nominal pressure.

- The pressure values are valid on radial rigid carbon steel pipes under static loads (for minimum pipe wall-thicknesssee p. 23 or contact factory).

- Weight of the pipe joints see packing specifications.- Strip insert is required when gap between pipe ends is excessive, in presence of swelling, vacuum/depression (suction line),

or external pressure. Strip inserts are available, under separate order, at additional costs.

MaterialsW1 W2 W4 W5

ComponentsCasing AISI 316 TiScrews AISI 316 LU-bolts AISI 316 TiAnchoring ring AISI 301Strip insert (option) AISI 316 L / PA/GFSealing sleeveEPDM

Temp.: -20°C up to +80°CMedium: all qualities of water, waste water, air solids and chemical products

Sealing sleeveNBR

Temp.: -20°C up to +80°CMedium: water, gas, oil, fuel and other hydrocarbons

Sealing sleeveVITON A*

Temp.: -20°C up to +180°CMedium: ozone, oxygen, acids, gas, oil and fuel (only with strip insert)

Chemical resistance of sealing sleeve on request.

Pipe Clamping range Nominalpressure

Workingpressure

Dimensional data Setting gap bet-ween pipe ends

R max.

Locking bolts

braced without with torque allen thread

AD(mm) (mm)

PN(bar)

PS(bar)

B(mm)

C(mm)

DV(mm)

KV(mm)

strip insert(mm)

rate(Nm)

head(mm)

M...

26.9 26.4 - 27.4 16 46 46 19 43 70 5 5 7.5 5 630.0 29.5 - 30.5 16 42 46 17 47 75 5 5 7.5 5 633.7 33.2 - 34.2 16 38 46 17 51 75 5 5 7.5 5 6

38.0 37.5 - 38.5 16 33 61 25 57 90 5 10 15 6 842.4 41.9 - 42.9 16 30 61 25 62 95 5 10 15 6 844.5 44.0 - 45.0 16 33 61 25 64 95 5 10 15 6 8

48.3* 47.8 - 48.8 16 30 61 25 67 100 5 10 15 6 8

54.0 53.5 - 54.5 16 20 76 37 76 105 10 15 15 6 857.0 56.4 - 57.6 16 18 76 37 76 105 10 15 15 6 8

60.3* 59.7 - 60.9 16 22 76 37 79 110 10 15 15 6 8

66.6 64.9 - 67.3 16 27 93 35 87 126 10 15 20 6 873.0* 72.3 - 73.7 16 31 95 41 96 135 10 25 20 6 876.1* 75.3 - 76.9 16 31 95 41 98 135 10 25 20 6 879.5 78.7 - 80.3 16 23 93 35 100 135 10 15 20 6 8

84.0 83.2 - 84.8 16 26 95 35 112 145 10 15 20 6 888.9* 88.0 - 89.8 16 22 95 41 111 150 10 25 20 6 8100.6 99.6 - 101.6 16 22 95 35 129 165 10 15 25 6 8

101.6 100.6 - 102.6 16 22 95 35 130 165 10 15 25 6 8104.0 103.0 - 105.0 16 23 95 35 132 165 10 15 25 6 8104.8 103.8 - 105.8 16 22 95 35 133 165 10 15 25 6 8108.0 106.9 - 109.1 16 21 95 41 130 165 10 25 25 6 8

114.3* 113.2 - 115.4 16 16 95 41 136 170 10 25 25 6 8127.0 125.7 - 128.3 16 19 110 54 151 195 10 35 40 8 10129.0 127.7 - 130.3 16 19 110 54 153 195 10 35 40 8 10

130.2 128.9 - 131.5 16 19 110 54 154 200 10 35 40 8 10133.0 131.7 - 134.3 16 19 110 54 157 200 10 35 40 8 10139.7 138.3 - 141.1 16 16 110 54 164 210 10 35 40 8 10141.3 139.9 - 142.7 16 16 110 54 166 210 10 35 40 8 10

154.0 152.5 - 155.5 13 16 110 48 184 225 10 30 40 8 10159.0 157.4 - 160.6 13 16 110 54 183 225 10 35 40 8 10168.3 166.6 - 170.0 13 16 110 54 192 230 10 35 40 8 10219.1 216.9 - 221.3 10 16 142 80 250 295 10 35 60 10 12


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4.1.2 Metric Specification STRAUB-GRIP-L Ø 180.0 - 609.6 mm


Legend: - W1 - W5 according to DIN Standard 86128 (ASTM F1476 / F1548, ISO/NP-15837 / 15838).- PS: Working pressure considering the applications loads.- PN: Nominal pressure, includes four times safety factor, for applications that require authorisation of classification societies

(e.g. ABS, DNV, etc.)* Property class 12.9, Dacromet 500 (zinc-chromate with integrated lubricant).

Remarks: - Follow fitting / disassembly instructions.- Test pressure = 1,5 x nominal pressure- The pressure values are valid on radial rigid carbon steel pipes under static loads (for minimum wall-thickness of pipe

see p. 23 or contact factory).- Weight of the pipe joints see packing specifications.- Strip insert is required when gap between pipe ends is excessive, in presence of swelling, vacuum/depression (suction line),



Components

Casing AISI 316 Ti AISI 316 TiScrews AISI 4135* AISI 316 LBolts AISI 12L 14, galvanized AISI 316 L

Anchoring ring AISI 301 AISI 301Strip insert (option) AISI 316 L / HDPE AIDI 316 L / HDPESealing sleeveEPDM

Temp.: -20°C up to +80°CMedium: all qualities of water, waste water, air, solids and chemical products

Sealing sleeveNBR


Chemical resistance of sealing sleeve on request.Versions in W2 or W5.


Workingpressure

Dimensional data Settting gap bet-ween pipe ends

Rmax.

Locking bolts


AD(mm) (mm)

PN(bar)

PS(bar)

B(mm)

C(mm)

DV(mm)

KV(mm)

strip insert(mm)

rate(Nm)

head(mm)

M...

180.0 178.0 - 182.0 - 16 141 80 205 255 10 35 50 10 12193.7 192.0 - 195.5 - 16 141 80 224 270 10 35 50 10 12200.0 198.0 - 202.0 - 15 141 80 230 275 10 35 50 10 12204.0 202.0 - 206.0 . 14 141 80 234 280 10 35 50 10 12244.5 242.0 - 247.0 5.5 9 141 80 275 320 10 35 50 10 12250.0 247.5 - 252.5 5.5 9 141 80 280 325 10 35 50 10 12254.0 251.5 - 256.5 5.5 9 141 80 284 325 10 35 50 10 12267.0 264.5 - 269.5 5 8 141 80 297 340 10 35 50 10 12273.0 270.5 - 275.5 4 7 141 80 303 345 10 35 50 10 12304.0 301.0 - 307.0 4 6 141 80 334 375 10 35 60 10 12323.9 320.5 - 327.0 3 5 141 80 354 395 10 35 60 10 12355.6 352.0 - 359.0 2.5 4 141 80 386 425 10 35 60 10 12406.4 402.5 - 410.5 2 3 141 80 436 470 10 35 60 10 12457.2 452.5 - 461.5 - 2 141 80 487 520 10 35 60 10 12508.0 503.5 - 512.5 - 2 141 80 538 570 10 35 70 10 12558.8 554.5 - 563.5 - 2 141 80 589 620 10 35 70 10 12609.6 605.0 - 614.0 - 1 141 80 640 670 10 35 70 10 12


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4.1.3 Imperial Specification STRAUB-GRIP-L Ø 3/4 - 8 inch

Right of alteration reserved. .

Legend: - W1 - W5 according to DIN Standard 86128 (ASTM F1476 / F1548, ISO/NP-15837 / 15838).- PS: Working pressure considering the applications loads. Contact factory for higher working pressure.** Type approval pressure for applications that require authorisation of classification societies (e.g. ABS, DNV, etc.).* All items marked * are shown with actual pipe outside diameters, and are for non-standard pipe sizes. All shown in bold type

are standard pipe sizes.Remarks: - Follow fitting / disassembly instructions. Test pressure = 1,5 x nominal pressure.

- The pressure values are valid on radial rigid carbon steel pipes under static loads (for minimum wall-thickness of pipesee p. 23 or contact factory).

- Weight of the pipe joints see packing specifications.- Strip insert is required when gap between pipe ends is excessive, in presence of swelling, vacuum/depression (suction line), or

external pressure. Strip inserts are available, under separate order, at additional costs.

US / 165120


ComponentsCasing AISI 316 TiScrews AISI 316 LU-bolts AISI 316 TiAnchoring ring AISI 301Strip insert (option) AISI 316 L / PA/GFSealing sleeveEPDM

Temp.: -4°F up to +176°FMedium: all qualities of water, waste water, air solids and chemical products

Sealing sleeveNBR

Temp.: -4°F up to +176°FMedium: water, gas, oil, fuel and other hydrocarbons

Sealing sleeveVITON A#

Temp.: -4°F up to +356°FMedium: ozone, oxygen, acids, gas, oil and fuel (only with strip insert)


Pipe-Ø For p ipe AD(tolerence

range)

Work ingpressure

PS

Typeapprovalpressure

Dimensional data Setting gap b e t -ween pipe ends

Rm a x .

Locking bolts

** braced without with torque allen thread

Nominal( inch)

A D(mm) ( inch) (psi) (bar) ps i

B( inch)

C( inch)

D V( inch)

KV( inch)

strip insert( inch)

rate(ft.lbf)

head( m m )

M...

3 /4" 26.9 1.04 - 1.08 670 46 232 1.8 0.7 1.7 2.8 0.2 0.2 5.5 5 61.2" 30.0 1.16 - 1.20 610 42 232 1.8 0.6 1.9 3.0 0.2 0.2 5.5 5 61" 33.7 1.31 - 1.35 550 38 232 1.8 0.6 2.0 3.0 0.2 0.2 5.5 5 6

1 1 /2"* 38.0 1.48 - 1.52 480 33 232 2.4 1.0 2.2 3.5 0.2 0.4 11 6 8

1 1/4 " 42.4 1.65 - 1.69 440 30 232 2.4 1.0 2.4 3.7 0.2 0.4 11 6 81 3 /4"* 44.5 1.73 - 1.77 480 33 232 2.4 1.0 2.5 3.7 0.2 0.4 11 6 8

11 /2 "# 48.3 1.88 - 1.92 440 30 232 2.4 1.0 2.6 3.9 0.2 0.4 11 6 82 1/8 "* 54.0 2.11 - 2.15 290 20 232 3.0 1.5 3.0 4.1 0.4 0.6 11 6 82 1/4 "* 57.0 2.22 - 2.27 260 18 232 3.0 1.5 3.0 4.1 0.4 0.6 11 6 8

2"# 60.3 2.35 - 2.40 320 22 232 3.0 1.5 3.1 4.3 0.4 0.6 11 6 82.62 66.6 2.55 - 2.65 390 27 232 3.7 1.4 3.5 5.0 0.4 0.6 15 6 8

2 1 /2"# 73.0 2.85 - 2.90 450 31 232 3.7 1.6 3.8 5.3 0.4 1.0 15 6 83"*# 76.1 2.96 - 3.03 450 31 232 3.7 1.6 3.9 5.3 0.4 1.0 15 6 83.13 79.5 3.10 - 3.16 333 23 232 3.7 1.4 4.0 5.4 0.4 0.6 15 6 8

3.3"* 84.0 3.28 - 3.34 380 26 232 3.7 1.4 4.4 5.7 0.4 0.6 15 6 83"# 88.9 3.46 - 3.54 320 22 232 3.7 1.6 4.4 5.9 0.4 1.0 15 6 8

3.96"* 100.6 3.92 - 4.00 320 22 232 3.7 1.4 5.1 6.5 0.4 0.6 18 6 83 1 /2" 101.6 3.96 - 4.04 320 22 232 3.7 1.4 5.1 6.5 0.4 0.6 18 6 8

4.1"* 104.0 4.06 - 4.13 330 23 232 3.7 1.4 5.2 6.5 0.4 0.6 18 6 84.13"* 104.8 4.09 - 4.17 320 22 232 3.7 1.4 5.2 6.5 0.4 0.6 18 6 84 1/4 "* 108.0 4.21 - 4.30 300 21 232 3.7 1.6 5.1 6.5 0.4 1.0 18 6 8

4"# 114.3 4.46 - 4.54 232 16 232 3.7 1.6 5.4 6.6 0.4 1.0 18 6 85"* 127.0 4.95 - 5.05 280 19 232 4.3 2.1 5.9 7.7 0.4 1.4 30 8 10

5.1"* 129.0 5.03 - 5.13 280 19 232 4.3 2.1 6.0 7.7 0.4 1.4 30 8 105.13"* 130.2 5.07 - 5.18 280 19 232 4.3 2.1 6.1 7.9 0.4 1.4 30 8 105 1/4 "* 133.0 5.19 - 5.29 280 19 232 4.3 2.1 6.2 7.9 0.4 1.4 30 8 105 1/2 "* 139.7 5.44 - 5.56 232 16 232 4.3 2.1 6.5 8.3 0.4 1.4 30 8 10

5" 141.3 5.51 - 5.62 232 16 232 4.3 2.1 6.5 8.3 0.4 1.4 30 8 106.1"* 154.0 6.00 - 6.12 232 16 189 4.3 1.9 7.2 8.9 0.4 1.2 30 8 106 1/4 "* 159.0 6.20 - 6.32 232 16 189 4.3 2.1 7.2 8.9 0.4 1.4 30 8 10

6" 168.3 6.56 - 6.69 232 16 189 4.3 2.1 7.6 9.1 0.4 1.4 30 8 108" 219.1 8.54 - 8.71 232 16 145 5.6 3.2 9.8 11.6 0.4 1.4 45 10 12


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4.1.4 Imperial Specification STRAUB-GRIP-L Ø 7.1 - 24 inch

.

Legend: - W1 - W5 according to DIN Standard 86128 (ASTM F1476 / F1548, ISO/NP-15837 / 15838).- PS: Working pressure considering the applications loads. Contact factory for higher working pressure.* All items marked * are shown with actual pipe outside diameters, and are for non-standard pipe sizes. All shown in bold type

are standard pipe sizes.** Type approval pressure for applications that require authorisaiton of classification societies (e.g. ABS, DNV, etc.)***Property class 12.9, Dacromet 500 (zinc-chromate with integrated lubricant).

Remarks: - Follow fitting / disassembly instructions.- Test pressure = 1,5 x nominal pressure.- The pressure values are valid on radial rigid carbon steel pipes under static loads (for minimum wall-thickness of pipe

see p. 23 or contact factory).- Weight of the pipe joints see packing specifications.- Strip insert is required when gap between pipe ends is excessive, in presence of swelling, vacuum/depression (suction line), or



US / 165120


Components

Casing AISI 316 Ti AISI 316 TiScrews AISI 4135*** AISI 316 LBolts AISI 12L 14, galvanized AISI 316 L

Anchoring ring AISI 301 AISI 301Strip insert (option) AISI 316 L / HDPE AIDI 316 L / HDPESealing sleeveEPDM

Temp.: -4°F up to +176°FMedium: all qualities of water, waste water, air, solids and chemical products

Sealing sleeveNBR



Pipe-Ø For pipe AD(tolerence

range)

Workingpressure

PS



Rmax.

Locking bolts


Nominal(inch)

AD(mm) (inch) (psi) (bar) psi

B(inch)

C(inch)

DV(inch)

KV(inch)

strip insert(inch)

rate(ft.lbf)

head(mm)

M...

7.1"* 180.0 7.01 - 7.17 232 16 - 5.5 3.1 8.1 10.0 0.4 1.4 37 10 127.6"* 193.7 7.56 - 7.70 232 16 - 5.5 3.1 8.8 10.6 0.4 1.4 37 10 127.9"* 200.0 7.80 - 7.95 220 15 - 5.5 3.1 9.1 10.8 0.4 1.4 37 10 128"* 204.0 7.95 - 8.11 200 14 - 5.5 3.1 9.2 11.0 0.4 1.4 37 10 129" 244.5 9.53 - 9.72 130 9 80 5.5 3.1 10.8 12.6 0.4 1.4 37 10 12

9.8"* 250.0 9.74 - 9.94 130 9 80 5.5 3.1 11.0 12.8 0.4 1.4 37 10 1210" 254.0 9.90 - 10.10 130 9 80 5.5 3.1 11.2 12.8 0.4 1.4 37 10 12

10.5"* 267.0 10.41 - 10.61 120 8 72 5.5 3.1 11.7 13.4 0.4 1.4 37 10 1210" 273.0 10.65 - 10.85 100 7 58 5.5 3.1 11.9 13.6 0.4 1.4 37 10 1212" 304.0 11.85 - 12.09 90 6 58 5.5 3.1 13.1 14.8 0.4 1.4 46 10 1212" 323.9 12.62 - 12.87 70 5 44 5.5 3.1 13.9 15.6 0.4 1.4 46 10 1214" 355.6 13.86 - 14.13 60 4 36 5.5 3.1 15.2 16.7 0.4 1.4 46 10 1216" 406.4 15.85 - 16.16 45 3 29 5.5 3.1 17.2 18.5 0.4 1.4 46 10 1218" 457.2 17.81 - 18.17 30 2 - 5.5 3.1 19.2 20.5 0.4 1.4 46 10 1220" 508.0 19.82 - 20.18 30 2 - 5.5 3.1 21.2 22.4 0.4 1.4 52 10 1222" 558.8 21.83 - 22.19 30 2 - 5.5 3.1 23.2 24.4 0.4 1.4 52 10 1224" 609.6 23.82 - 24.17 15 1 - 5.5 3.1 25.2 26.4 0.4 1.4 52 10 12


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Metricw Working pressure up to 67 barw Outside diameters 30.0 up to 609.6mmw Temperature range -30°C up to +100°Cw Example for order:

STRAUB-METAL-GRIP 76.1, EPDM, ES

4.2 STRAUB-METAL-GRIP

Air conditioning in the city of Paris

Insulated carbon steel pipe with 12bar/175 psioperating pressure, 5°C/41°F medium temperature,STRAUB-METAL-GRIP 219.1 mm/8“

w Shock testing up to 200gw Four times safety factorw Easy fitting

Imperialw Working pressure up to 1000 psiw Outside diameters 1.2 up to 24 inchw Temperature range -22°F up to +212°Fw Example for order:

STRAUB-METAL-GRIP 3“, EPDM, ES

For building construction or civil engineering, water or waste water installations, power plants orindustrial plants, shipbuilding/offshore or as a machinery component, the STRAUB-METAL-GRIP is theultimate pull-out resistant pipe joint. STRAUB-METAL-GRIP joins any metal pipe, whether pressure orsuction line.


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4.2.1 Metric Specification STRAUB-METAL-GRIP Ø 30.0 - 219.1 mm


Legend: - W1 - W5 according to DIN Standard 86128 (ASTM F1476 / F1548, ISO/NP-15837 / 15838).- PS: Working pressure considering the applications loads. Contact factory for higher working pressure.- PN: Nominal pressure, includes four times safety factor, for applications that require authorisation of classification societies

(e.g. ABS, DNV, etc.).* Property class 12.9, Dacromet 500 (zinc-chromate with integrated lubricant).





Components

Casing AISI 304 AISI 304Screws AISI 4135* AISI 316Bolts AISI 12L 14, galvanized AISI 304

Anchoring ring AISI 301 AISI 301Strip insert (option) AISI 316 L / PA/GF AISI 316 L / PA/GFSealing sleeveEPDM


Sealing sleeveNBR




Workingpressure


Rmax.

Locking bolts


AD(mm) (mm)

PN(bar)

PS(bar)

B(mm)

C(mm)

DV(mm)

KV(mm)

strip insert(mm)

rate(Nm)

head(mm)

M...

30.0 29.5 - 30.5 16 67 46/67 18 47 70 5 15 10 6 833.7 33.2 - 34.2 16 62 46/67 18 52 75 5 15 10 6 838.0 37.5 - 38.5 16 58 61 19 58 90 5 15 15 6 842.4 41.9 - 42.9 16 53 61 20 62 90 5 15 15 6 844.5 44.0 - 45.0 16 48 61 20 64 95 5 15 15 6 848.3 47.8 - 48.8 16 44 61 20 68 95 5 15 15 6 854.0 53.5 - 54.5 16 39 77 38 74 100 5 15 20 6 857.0 56.4 - 57.6 16 37 77 32 77 105 10 25 20 6 860.3 59.7 - 60.9 16 37 77 32 82 110 10 25 20 6 876.1 75.3 - 76.9 16 56 94 39 100 130 10 25 35 8 1084.0 83.2 - 84.8 16 45 94 39 112 140 10 25 35 8 1088.9 88.0 - 89.8 16 41 94 39 117 145 10 25 35 8 10104.0 103.0 - 105.0 16 37 94 39 133 160 10 25 35 8 10108.0 106.9 - 109.1 16 35 94 39 133 160 10 25 35 8 10114.3 113.2 - 115.4 16 34 94 39 139 165 10 25 35 8 10129.0 127.7 - 130.3 16 33 108 51 160 190 15 35 60 10 12133.0 131.7 - 134.3 16 33 108 43 160 190 15 30 60 10 12139.7 138.3 - 141 .1 16 32 109 43 168 200 15 30 60 10 12154.0 152.5 - 155.5 16 32 109 51 186 215 15 35 60 10 12159.0 157.4 - 160.6 16 31 109 43 187 215 15 30 60 10 12168.3 166.6 - 170.0 16 29 109 43 200 230 15 30 60 10 12219.1 216.9 - 221.3 16 26 150 60 259 295 15 35 100 14 16


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Legend: - W1 - W5 according to DIN Standard 86128 (ASTM F1476 / F1548, ISO/NP-15837 / 15838).- PS: Working pressure considering the applications loads. Contact factory for higher working pressure.- PN: Nominal pressure, includes four times safety factor, for applications that require authorisation of classification

societies (e.g. ABS, DNV, etc.).* Property class 12.9, Dacromet 500 (zinc-chromate with integrated lubricant).




4.2.2 Metric Specification STRAUB-METAL-GRIP Ø 244.5 - 609.6 mm


Components

Casing AISI 1024, hot-dip galv.Screws AISI 4135*Bolts AISI 12L 14, galvanizedAnchoring ring AISI 301Strip insert (option) AISI 316 L / PA/GFSealing sleeveEPDM


Sealing sleeveNBR




Workingpressure


Rmax.

Locking bolts


AD(mm) (mm)

PN(bar)

PS(bar)

B(mm)

C(mm)

DV(mm)

KV(mm)

strip insert(mm)

rate(Nm)

head(mm)

M...

244.5 242.0- 247.0 14 27 148 67 290 345 15 35 180 17 20267.0 264.5 - 269.5 12 24 148 67 312 365 15 35 180 17 20273.0 270.5 - 275.5 12 21 148 67 318 370 15 35 180 17 20323.9 320.5 - 327.0 10 18 148 67 369 420 15 35 230 17 20355.6 352.0 - 359.0 8 17 148 67 401 450 15 35 230 17 20406.4 402.5 - 410.5 8 14 148 67 451 500 15 35 230 17 20457.2 452.5 - 462.0 6 8 148 67 502 550 15 35 250 17 20508.0 503.0 - 513.0 5 6 148 67 553 600 15 35 250 17 20558.8 554.0 - 564.0 4.5 6 148 67 604 650 15 35 300 17 20609.6 604.5 - 614.5 4 5 148 67 655 700 15 35 300 17 20


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4.2.3 Imperial Specification STRAUB-METAL-GRIP Ø 1 - 8 inch

US / 115100



are standard pipe sizes.** Type approval pressure for applications that require authorisation of classification societies (e.g. ABS, DNV, etc.).*** Property class 12.9, Dacromet 500 (zinc-chromate with integrated lubricant).





Components

Casing AISI 304 AISI 304Screws AISI 4135*** AISI 316Bolts AISI 12L 14, galvanized AISI 304

Anchoring ring AISI 301 AISI 301Strip insert (option) AISI 316 L / PA/GF AISI 316 L / PA/GFSealing sleeveEPDM


Sealing sleeveNBR




range)

Workingpressure



Rmax.

Locking bolts

PS ** braced without with torque allen thread

Nominal(inch)


B(inch)

C(inch)

DV(inch)

KV(inch)

strip insert(inch)

rate(ft.lbf)

head(mm)

M...

1.2 30.0 1.16 - 1.20 1000 67 232 1.8/2.6 0.7 1.9 2.8 0.2 0.6 7.5 6 81" 33.7 1.31 - 1.35 900 62 232 1.8/2.6 0.7 2.0 3.0 0.2 0.6 7.5 6 8

11/2"* 38.0 1.48 - 1.52 840 58 232 2.4 0.8 2.3 3.5 0.2 0.6 11 6 811/4" 42.4 1.65 - 1.69 770 53 232 2.4 0.8 2.4 3.5 0.2 0.6 11 6 8

13/4"* 44.5 1.73 - 1.77 700 48 232 2.4 0.8 2.5 3.7 0.2 0.6 11 6 8

11/2" 48.3 1.88 - 1.92 640 44 232 2.4 0.8 2.7 3.7 0.2 0.6 11 6 821/8"* 54.0 2.11 - 2.15 570 39 232 3.0 1.5 2.9 3.9 0.2 0.6 15 6 821/4"* 57.0 2.22 - 2.27 540 37 232 3.0 1.3 3.0 4.1 0.4 1.0 15 6 8

2" 60.3 2.35 - 2.40 540 37 232 3.0 1.3 3.2 4.3 0.4 1.0 15 6 83"* 76.1 2.96 - 3.03 810 56 232 3.7 1.5 3.9 5.1 0.4 1.0 26 8 10

3.3"* 84.0 3.28 - 3.34 650 45 232 3.7 1.5 4.4 5.5 0.4 1.0 26 8 103" 88.9 3.46 - 3.54 590 41 232 3.7 1.5 4.6 5.7 0.4 1.0 26 8 10

4.1"* 104.0 4.06 - 4.13 540 37 232 3.7 1.5 5.2 6.3 0.4 1.0 26 8 1041/4"* 108.0 4.21 - 4.30 510 35 232 3.7 1.5 5.2 6.3 0.4 1.0 26 8 10

4" 114.3 4.46 - 4.54 490 34 232 3.7 1.5 5.5 6.5 0.4 1.0 26 8 105.1"* 129.0 5.03 - 5.13 480 33 232 4.3 2.0 6.3 7.5 0.6 1.4 44 10 1251/4"* 133.0 5.19 - 5.29 480 33 232 4.3 1.7 6.3 7.5 0.6 1.2 44 10 1251/2"* 139.7 5.44 - 5.56 470 32 232 4.3 1.7 6.6 7.9 0.6 1.2 44 10 126.1"* 154.0 6.00 - 6.12 470 32 232 4.3 2.0 7.3 8.5 0.6 1.4 44 10 12

61/4"* 159.0 6.20 - 6.32 450 31 232 4.3 1.7 7.4 8.5 0.6 1.2 44 10 126" 168.3 6.56 - 6.69 420 29 232 4.3 1.7 7.9 9.1 0.6 1.2 44 10 128" 219.1 8.54 - 8.71 380 26 232 5.9 2.4 10.2 11.6 0.6 1.4 74 14 16


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4.2.4 Imperial Specification STRAUB-METAL-GRIP Ø 9 - 24 inch



are standard pipe sizes.** Type approval pressure for applications that require authorisation of classification societies (e.g. ABS, DNV, etc.).*** Property class 12.9, Dacromet 500 (zinc-chromate with integrated lubricant).




US / 115100


Components

Casing AISI 1024, hot-dip galv.Screws AISI 4135***Bolts AISI 12L 14, galvanizedAnchoring ring AISI 301Strip insert (option) AISI 316 L / HDPESealing sleeveEPDM


Sealing sleeveNBR




range)

Workingpressure

PS



Rmax.

Locking bolts


Nominal(inch)


B(inch)

C(inch)

DV(inch)

KV(inch)

strip insert(inch)

rate(ft.lbf)

head(mm)

M...

9" 244.5 9.53 - 9.72 390 27 203 5.8 2.6 11.4 13.6 0.6 1.4 133 17 2010.5"* 267.0 10.41 - 10.61 350 24 174 5.8 2.6 12.3 14.4 0.6 1.4 133 17 20

10" 273.0 10.65 - 10.85 300 21 174 5.8 2.6 12.5 14.6 0.6 1.4 133 17 2012" 323.9 12.62 - 12.87 260 18 145 5.8 2.6 14.5 16.5 0.6 1.4 170 17 2014" 355.6 13.86 - 14.13 250 17 116 5.8 2.6 15.8 17.7 0.6 1.4 170 17 2016" 406.4 15.85 - 16.16 200 14 116 5.8 2.6 17.8 19.7 0.6 1.4 170 17 2018" 457.2 17.81 - 18.19 120 8 94 5.8 2.6 19.8 21.7 0.6 1.4 185 17 2020" 508.0 19.80 - 20.20 90 6 80 5.8 2.6 21.8 23.6 0.6 1.4 185 17 2022" 558.8 21.81 - 22.20 90 6 73 5.8 2.6 23.8 25.6 0.6 1.4 221 17 2024" 609.6 23.80 - 24.19 70 5 65 5.8 2.6 25.8 27.6 0.6 1.4 221 17 20


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4.3 STRAUB-PLAST-/-COMBI-GRIP

Metricw Working pressure up to 16 barw Outside diameters 40.0 up to 160.0 mmw Temperature range -30°C up to +100°Cw Example for order:

STRAUB-PLAST-GRIP 75.0, EPDM, ESSTRAUB-COMBI-GRIP 75.0, EPDM, ES

For gas and water supply and industrial plants: for suction and pressure lines, thin and thick walled pipes.STRAUB-PLAST-GRIP is the ideal pipe joint for all kind of plastic pipes. STRAUB-COMBI-GRIP guaranteesa perfect transition from plastic to metal pipes. Leading technology and high quality production bringssafety to each area of operation.

For the installation of pipes made of polyethylene and other soft-thermoplastic materials use ourstiffening rings STRAUB-PG (page 73).

Imperialw Working pressure up to 232 psiw Outside diameters 11/4 up to 6 inchw Temperature range -22°F up to +212°Fw Example for order:

STRAUB-PLAST-GRIP 21/2“, EPDM, ESSTRAUB-COMBI-GRIP 21/2“, EPDM, ES

Swiss Railway Zurich

Propane-Gas distribution main for PE and PVCSTRAUB-PLAST-GRIP 75 mm/21/2“

w Resist weatherw Economical solution for transitionsw No special installation tool and electric supply

point requiredw Joins all kind of plastic


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E / 125100

STRAUB-PLAST-GRIP (for plastic pipes)


Legend: - W1 - W5 according to DIN Standard 86128 (ASTM F1476 / F1548, ISO/NP-15837 / 15838).* Property class 12.9, Dacromet 500 (zinc-chromate with integrated lubricant).

Remarks: - Follow fitting / disassembly instructions. Test pressure = 1,5 x nominal pressure.- For the installation of pipes made of polyethylene and other soft-thermoplastic materials use our stiffening rings STRAUB-PG.- Weight of the pipe joints see packing specifications.- Strip insert is required when gap between pipe ends is excessive, in presence of swelling, vacuum/depression (suction line),


STRAUB-COMBI-GRIP (for transitions)

4.3.1 Metric Specification STRAUB-PLAST-/-COMBI-GRIP Ø 40.0 - 160.0 mmMaterials

W1 W2 W4 W5Components

Casing AISI 304 AISI 304Screws AISI 4135* AISI 316 / 316 LBolts AISI 12L 14, galvanized AISI 304Anchoring ring AISI 301 AISI 301Strip insert (option) AISI 316 L / PA/GF AISI 316 L / PA/GFSealing sleeveEPDM


Sealing sleeveNBR





Rmax.

Locking bolts

braced without with torque allen threadAD

(mm) (mm)PN

(bar)B

(mm)C

(mm)DV

(mm)KV

(mm)strip insert

(mm)rate(Nm)

head(mm)

M...

40.0 39.0 - 40.5 16 61 19 60 90 5 15 15 6 850.0 49.0 - 50.5 16 61 26 70 100 5 15 15 6 863.0 62.0 - 64.0 16 76 32 85 115 10 20 20 6 875.0 74.0 - 76.0 16 94 39 99 130 10 25 35 8 1090.0 89.0 - 91.0 16 94 39 118 145 10 25 35 8 10110.0 109.0 - 111.0 16 94 39 135 160 10 25 35 8 10114.3 113.0 - 115.0 16 94 39 139 165 10 25 35 8 10125.0 124.0 - 126.0 16 108 43 152 185 15 30 60 10 12140.0 139.0 - 142.0 16 109 43 168 200 15 30 60 10 12160.0 159.0 - 162.0 16 109 43 188 215 15 30 60 10 12



R max.

Locking bolts

AD braced without with torque allen thread

plastic(mm)

metal(mm)

plastic(mm)

metal(mm)

PN(bar)

B(mm)

C(mm)

DV(mm)

KV(mm)

strip insert(mm)

rate(Nm)

head(mm)

M...

40.0 38.0 39.0 - 40.5 37.5 - 39.0 16 61 19 60 90 5 10 15 6 840.0 42.4 39.0 - 40.5 42.0 - 43.5 16 61 20 63 95 5 10 15 6 850.0 48.3 49.0 - 50.5 47.8 - 49.0 16 61 26 70 100 5 10 15 6 863.0 60.3 62.0 - 64.0 59.7 - 61.0 16 76 32 85 115 10 25 20 6 875.0 76.1 74.0 - 76.0 75.0 - 77.5 16 94 39 100 130 10 25 35 8 1090.0 88.9 89.0 - 91.0 87.0 - 90.0 16 94 39 118 145 10 25 35 8 10

110.0 108.0 109.0 - 111.0 106.5 - 110.5 16 94 39 135 160 10 25 35 8 10110.0 114.3 109.0 - 111.0 112.0 - 116.0 16 97 45 140 170 10 25 35 8 10114.3 114.3 113.0 - 115.0 112.0 - 116.0 16 94 39 139 165 10 25 35 8 10140.0 139.7 139.0 - 142.0 137.5 - 141.0 16 109 43 168 200 15 30 60 10 12160.0 159.0 159.0 - 162.0 157.0 - 160.5 16 109 43 188 215 15 30 60 10 12

STRAUB-PLAST-GRIP STRAUB-COMBI-GRIP


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US / 125100

STRAUB-PLAST-GRIP STRAUB-COMBI-GRIP

STRAUB-PLAST-GRIP (for plastic pipes)

Legend: - W1 - W5 according to DIN Standard 86128 (ASTM F1476 / F1548, ISO/NP-15837 / 15838). Right of alteration reserved.

**Property class 12.9, Dacromet 500 (zinc-chromate with integrated lubricant).* All items marked * are shown with actual pipe outside diameters, and are for non-standard pipe sizes. All shown in bold

type are standard pipe sizes.Remarks: - Follow fitting / disassembly instructions. / Weight of the pipe joints see packing specifications.

- For the installation of pipes made of polyethylene and other soft-thermoplastic materials use our stiffening rings STRAUB-PG.- Strip insert is required when gap between pipe ends is excessive, in presence of swelling, vacuum/depression (suction line),


STRAUB-COMBI-GRIP (for transitions)

4.3.2 Imperial Specification STRAUB-PLAST-/-COMBI-GRIP Ø 11/4 - 6 inch

Pipe-Ø Clamping range Typeapprovalpressure


Rmax.

Locking bolts

(inch)


Nominal(inch)

AD(mm) psi

B(inch)

C(inch)

DV(inch)

KV(inch)

strip insert(inch)

rate(ft.lbf)

head(mm)

M...

1 1/4" 40.0 1.54 - 1.59 232 2.4 0.7 2.4 3.5 0.2 0.6 11 6 811/2" 50.0 1.93 - 1.99 232 2.4 1.0 2.8 3.9 0.2 0.6 11 6 82" 63.0 2.44 - 2.52 232 3.0 1.2 3.4 4.5 0.4 0.8 15 6 8

21/2" 75.0 2.91 - 2.99 232 3.7 1.5 3.9 5.1 0.4 1.0 26 8 103" 90.0 3.50 - 3.58 232 3.7 1.5 4.6 5.7 0.4 1.0 26 8 104" 110.0 4.29 - 4.37 232 3.7 1.5 5.3 6.3 0.4 1.0 26 8 10

41/2" 114.3 4.45 - 4.53 232 3.7 1.5 5.5 6.5 0.4 1.0 26 8 104.92" 125.0 4.88 - 4.96 232 4.3 1.7 6.0 7.3 0.6 1.2 44 10 12

5" 140.0 5.47 - 5.59 232 4.3 1.7 6.6 7.9 0.6 1.2 44 10 126" 160.0 6.26 - 6.38 232 4.3 1.7 7.4 8.5 0.6 1.2 44 10 12

Pipe-Ø Clamping range Typeapprovalpressure


Rmax.

Locking bolts

plastic metal

plastic(inch)

metal(inch)


Nom.(inch)

AD(mm)

Nom.(inch)

AD(mm) psi

B(inch)

C(inch)

DV(inch)

KV(inch)

strip insert(inch)

rate(ft.lbf)

head(mm)

M...

1 1/4" 40.0 11/2"* 38.0 1.54 - 1.59 1.48 - 1.54 232 2.4 0.7 2.4 3.5 0.2 0.4 11 6 811/4" 40.0 11/4" 42.4 1.54 - 1.59 1.65 - 1.71 232 2.4 0.8 2.5 3.7 0.2 0.4 11 6 811/2" 50.0 11/2" 48.3 1.93 - 1.99 1.88 - 1.93 232 2.4 1.0 2.8 3.9 0.2 0.4 11 6 82" 63.0 2" 60.3 2.44 - 2.52 2.35 - 2.40 232 3.0 1.2 3.4 4.5 0.4 1.0 15 6 8

21/2" 75.0 3"* 76.1 2.91 - 2.99 2.95 - 3.05 232 3.7 1.5 3.9 5.1 0.4 1.0 26 8 103" 90.0 3" 88.9 3.50 - 3.58 3.43 - 3.54 232 3.7 1.5 4.6 5.7 0.4 1.0 26 8 104" 110.0 41/4"* 108.0 4.29 - 4.37 4.19 - 4.35 232 3.7 1.5 5.3 6.3 0.4 1.0 26 8 104" 110.0 4 1/2" 114.3 4.29 - 4.37 4.41 - 4.57 232 3.8 1.8 5.5 6.7 0.4 1.0 26 8 10

4 1/2" 114.3 4" 114.3 4.45 - 4.53 4.41 - 4.57 232 3.7 1.5 5.5 6.5 0.4 1.0 26 8 105" 140.0 51/2"* 139.7 5.47 - 5.59 5.41 - 5.55 232 4.3 1.7 6.6 7.9 0.6 1.2 44 10 126" 160.0 61/4"* 159.0 6.26 - 6.38 6.18 - 6.32 232 4.3 1.7 7.4 8.5 0.6 1.2 44 10 12


Components

Casing AISI 304 AISI 304Screws AISI 4135** AISI 316 / 316 LBolts AISI 12L 14, galvanized AISI 304Anchoring ring AISI 301 AISI 301Strip insert (option) AISI 316 L / PA/GF AISI 316 L / PA/GFSealing sleeveEPDM

Temp.: -22°F up to 212°FMedium: all qualities of water, waste water, air, solids and chemical products

Sealing sleeveNBR




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4.4 Allowable pipe diameter tolerances

Clamping range

Different diameters

E / 180010

Type of Outside diameter Clamping range DiameterSTRAUB of coupling per AD difference

coupling AD ranges +/- AD1 : AD2

[mm] [mm / %] [mm / %]

GRIP-L 26.9 - 88.9 1.0 % 2.0 mm100.6 - 273.0 1.0 % 2.0 %304.0 - 609.6 1.0 % 6.0 mm

METAL-GRIP 33.7 - 54.0 0.5 mm 2.0 mm57.0 - 88.9 1.0 % 2.0 mm

104.0 - 273.0 1.0 % 2.0 %323.9 - 609.6 1.0 % 6.0 mm

COMBI-GRIP 40.0 / 38.0 - 50.0 / 48.3 0.5 / 0.5 mm 2.0 mm63.0 / 60.3 - 90.0 / 88.9 1.0 / 1.0 mm 2.0 mm

110.0 / 108.0 - 114.3 / 114.3 1.0 / 2.0 mm 2.0 %140.0 / 139.7 - 160.0 / 159.0 1.5 / 1.5 mm 2.0 %

PLAST-GRIP 40.0 - 50.0 0.5 mm 2.0 mm63.0 - 90.0 1.0 mm 2.0 mm

110.0 - 114.3 1.0 mm 2.0 %125.0 - 160.0 1.5 mm 2.0 %

Metric


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Type of Outside diameter Clamping range DiameterSTRAUB of coupling per AD difference

coupling AD ranges +/- AD1 : AD2

[inch] [inch / %] [inch / %]

GRIP-L 3/4“ - 3“ 1.0 % 0.08“3.96“* - 10“ 1.0 % 2.0 %12“* - 24“ 1.0 % 0.24“

METAL-GRIP 1“ - 21/8“* 0.02“ 0.08“21/4“* - 3“ 1.0 % 0.08“4.1“* - 10“ 1.0 % 2.0 %12“ - 24“ 1.0 % 0.24“

COMBI-GRIP 11/4“** / 11/2“* - 11/2“** / 11/2“ 0.02“ / 0.02“ 0.08“2“** / 2“ - 3“** / 3“ 0.04“ / 0.04“ 0.08“4“** / 41/4“ - 4“ / 4“ 0.04“ / 0.08“ 2.0 %

5“** / 51/2“ - 6“** / 61/4“ 0.06“ / 0.06“ 2.0 %

PLAST-GRIP 11/4“** - 11/2“** 0.02“ 0.08“2“** - 3“** 0.04“ 0.08“4“** - 4“ 0.04“ 2.0 %

4.9“* - 6“** 0.06“ 2.0 %

Imperial

US / 180010

* All diameters marked * are shown with actual pipe outside diameters, and are for non-standard pipesizes. All the other diameters are stand pipe sizes.

** All diameters marked ** are shown plastic pipe dimensions.


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4.5 Max. allowable setting gap between pipe ends R

Pipe end gaps occur through misalignment, mounting inaccuracies and changes in length. Such adistance in total must not exceed the mentioned value “R“.

A greater pipe end gap can be accommodated when a strip insert is positioned between the seal lips.

The gasket has to be protected from abrasion by the pipe ends in the following cases by either reducingthe pipe end gap or by using a strip insert (Material: stainless steel 1.4435/316 L, PA/GF or HDPE):

w External over-pressure (e.g. under water)

w Vacuum (negative-pressure)

w Swelling (chemical influence)

w High temperatures

w High levels of mechanical or dynamic loading

w Plastic pipes

1. Axial setting gap between pipe ends 2. Setting gap between pipe endsthrough angular deflection

Strip insert


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Setting gap between pipe ends R

E / 180010

Type of Outside diameter Setting gap between pipe ends RSTRAUB of coupling without with

coupling AD ranges strip insert[mm] [mm] [mm]

GRIP-L 26.9 - 33.7 5 538.0 - 48.3 5 10

54.0 - 60.3 / 84.0 10 1573.0 / 76.1 / 88.9 10 25

100.6 - 104.8 10 15108.0 - 114.3 10 25

154.0 10 30127.0 - 141.3 / 159.0 - 609.6 10 35

METAL-GRIP 33.7 - 54.0 5 1557.0 - 114.3 10 25

133.0 / 139.7 / 159.0 / 168.3 15 30129.0 / 154.0 / 219.1 - 609.6 15 35

COMBI-GRIP 40.0 / 38.0 - 50.0 / 48.3 5 1063.0 / 60.3 - 114.3 / 114.3 10 25

140.0 / 139.7 - 160.0 / 159.0 15 35

PLAST-GRIP 40.0 - 50.0 5 1063.0 - 114.3 10 25125.0 - 160.0 15 35

Metric


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Type of Outside diameter Setting gap between pipe ends RSTRAUB of coupling without with

coupling AD ranges strip insert[inch] [inch] [inch]

GRIP-L 3/4“ - 1“ 0.2 0.211/2“* - 11/2“ 0.2 0.4

21/8“* - 2“ / 3.3“* 0.4 0.621/2“ / 3“* / 3“ 0.4 1.03.96“* - 4.13“* 0.4 0.6

41/4“* / 4“ 0.4 1.06.1“* 0.4 1.2

5“ - 5.56“* / 61/4“* - 24“ 0.4 1.4

METAL-GRIP 1“ - 21/8“* 0.2 0.621/4“* - 4“ 0.4 1.0

51/4“* / 51/2“* / 61/4“* / 6“ 0.6 1.25.1“* / 6.1“* / 8“ - 24“ 0.6 1.4

COMBI-GRIP 11/4“** / 11/2“* - 11/2“** / 11/2“ 0.2 0.42“** / 2“ - 3“** / 3“ 0.4 1.04“** / 41/4“ - 4“ / 4“ 0.4 1.0

5“** / 51/2“ - 6“** / 61/4“ 0.6 1.4

PLAST-GRIP 11/4“** - 11/2“** 0.2 0.42“** - 3“** 0.4 1.04“** - 4“ 0.4 1.0

4.9“* - 6“** 0.6 1.4

Imperial

US / 180010

* All diameters marked * are shown with actual pipe outside diameters, and are for non-standard pipesizes. All the other diameters are stand pipe sizes.

** All diameters marked ** are shown plastic pipe dimensions.


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4.6 Angular deflection α

Angular deflection α

Pipework system, whether buried or installed aboveground, are subject to various movements such assettling of groundworks, loading by traffic, building subsidence or temperature-induced length changes.Additional dynamic stresses are sometimes encountered, especially in such fields as offshore and marineapplications.

STRAUB products are not rigid connections but are flexible joints that permit all around angulardeflection of the pipe axes by up to 5°.

Furthermore they offer considerable safety. The highly efficient anchoring mechanism and the gasketpositioned away from any pressure forces ensure a tension-free and long-life connection even underangular deflection conditions.

Type of Outside diameter Angular deflectionSTRAUB of coupling α

coupling [Degree]

GRIP couplings up to 60.3 mm / 2“ 5°

from 76.1 mm / 3“ 4°

from 219.1 mm / 8“ 2°

w Fresh air supply line in a mine with STRAUB-METAL-GRIP

w As the lines have to be moved periodically, the use of STRAUB-METAL-GRIP made installation simpleand economical.

E / 180010


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Angular deflection test for VdS approval

STRAUB-GRIP-L DN 100 / 4“ / Ø 114.3 / 4.5“ (α = 20° / p = 20 bar / 300psi)

ProblemInstalling „straight“ length of pipe in a semiciruclar configuration with Ø 100 m. No welding from thepipe bends or cutting the pipe ends with an angle. Required angular deflection 6°.

SolutionAbsorption of 6° angular deflection in the STRAUB coupling. Joining pipe sections of 3 m length can beaccomplished with STRAUB-METAL-GRIP and STRAUB-FLEX with strip inserts.

Bank of Canton Waadt, Prilly

Angular deflection test


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4.7 Axial movement ∆l

Axial movement ∆l

Temperature changes in a pipework system result in axial movement which causes tension orcompression stresses. These must be compensated by taking suitable measures.

w Through expansion bows or spring leg

w By installing a STRAUB-GRIP coupling after a change of direction thereby converting theaxial change in length into an angular displacment.

E / 180010

Guiding support

GRIP

Guiding support

GRIP


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4.8 Axial misalignment

According to the DIN standard 2463 the permissible axial misalignment for STRAUB couplings amountsto 1% of OD or a maximum of 3 mm / 0.1 inch.

Axial misalignment can also be converted into an axial deflection or take the form of a cardan linkincorporating two couplings.

As shown below, considerably greater axial misalignments can be accomodated by using the appropriateinstallation procedure.

E / 180010

Axial misalignment

4.9 Resistance against bending and torsionSTRAUB couplings are specifically designed for the absorption of bending forces through flexibleyielding.

This flexibility yields basis for good absorption properties. Please consult our application department.


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4.10 STRAUB-METAL-GRIP on vertical piping

STRAUB-METAL-GRIP pipe couplings are the ideal connection for installing plain ended metal pipesections vertically using axial restraint capabilities while ensuring a perfect seal.

Axial tensile forces are generated in vertical, free-hanging, pumped pressure pipeline. For the calculationof these forces, please consult our application department.

The STRAUB-METAL-GRIP couplings mounted on the pipe can absorb torsion forces that occur whenpumps start or stop.

Application examples:

w Heat exchanger pipework in pits

w Pipework in bridge supports

w Fresh water pump pipelines from springs

w Pumped well pipelines

w Charging and emptying pipes from silos, tanks and vessels

w Risers in towers and tall buildings

E / 180030


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4.11 Special order couplings

4.11.1 Electrical conductivity of STRAUB-GRIPSTRAUB-GRIP couplings guarantee the electrical conductivity through the pipe connection because of theanchoring mechanism. STRAUB pipe couplings fully serve as grounding elements according to SEV 1078and ISN 411078. STRAUB-GRIP couplings show adequate low electrical transition resistance (0.3 Vvoltage / contact drop at 500 ampere).

Certifcate No. 93.1.01236.03 issued by the Federal Power Inspectorate gives approval to all STRAUB-GRIP couplings. Our products are authorised to carry the symbol.

Insulated connections (electrical separation) that are incorporated in pipelines for corrosion preventionpurposes are obligatory in certain application (e.g. house connections).

Numerous utility companies and installers achieve this insulated connection by incorporating a length ofplastic pipe in metal pipelines through the use of STRAUB-COMBI-GRIP couplings.

4.11.2 Demagnetised couplingsTest certificate WTD 71 / FGM confirms that the magnetic single measurement of pipe couplings yieldedvalues within the permissible tolerance (0.0000-0.0005 TESLA).

These couplings, which carry the mark „Demagnetised“, can be ordered from STRAUB.

4.11.3 Silicon-free couplingsThese couplings are fabricated in a special assembly area under extreme care and cleanliness conditionsand are individually packaged.

They are mostly used in the chemical and the automotive industry for spray-booth applications.

These couplings, which carry the mark „Silicon-free“, can be ordered from STRAUB.

+s

Waterworks Zug: Insulated house connection to thewater supply network using STRAUB-COMBI-GRIP 60.3/63.0 mm / 2“/2“ on a PVC-C adapter piece (SVGW9208-2803) (DVGW TS 212 E).

4. STRAUB-GRIP 4-e.pdf · Technical Manual 3/03 Page 26 STRAUB-GRIP 4. STRAUB-GRIP 4.1...

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