3. properties - straub 3-e.pdf · technical manual 3/03 page 13 properties 3.5 material...

Technical Manual 3/03 Page 8

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3. Properties

3.1 The progressive sealing effect

STRAUB-METAL-GRIP

STRAUB-FLEX / REP

The progressive sealing effect is a unique and patented feature of the STRAUB gasket:

w As the pressure in the pipe increases so does the force on the sealing lips, due to the flow throughthe pressure equalisation channel.

w The gasket is not subjected to any great loading thanks to the minimal installation torque applied.This results in continued elasticity and a long coupling life expectancy.

w The free space between the sealing lips serves as a „reservoir“ for the gasket in the event oftemperature swings. Space is also provided here for the „strip insert“ (see chapter 6.2) accessorywhich protects the gasket from the pipe ends and extends the life expectancy.

w Authentic progressive sealing effect through an innovative sealing lip construction, which has provenits functionality millions of times in practice.


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3.2 The progressive anchoring effect

STRAUB pipe couplings are used on conventional plain ended pipes without pipe end preparationbeing necessary.The progressive anchoring effect of all STRAUB-GRIP products is a unique and patented feature:

w As the bolts are tightened to the specified torque, the specially shaped teeth in the anchoring ringbite into the surface of the pipe. An axial restraint connection is created.

w Should the axial loading on the pipe increase due to increased internal pressure or exernal influences,the teeth bite even deeper into the pipe to compensate.

w There are STRAUB anchoring systems not only for hard surfaces such as iron and steel but also forsofter surfaces such as aluminium and plastic.

w Through differential hardening, the anchoring ring retains flexibility in service.


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3.3 Stress-free joining

3.3.1 AnchoringThe spring effect of the housing and the anchoring ring result in a flexible gripping connection.

The housing which bridges the pipe ends imparts no forces and thereby keeps the stress on the variouscomponents to a minimum.

The pipework is therefore not rigid but is flexible at every joint.

3.3.2 SealingThe gasket is positioned on the surface of the pipe and enables the pipe ends to move freely.

The sealing and anchoring functions are independent of one another in STRAUB pipe couplings.


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Higher temperatures are possible for brief periods but reduce the life expectancy and elasticity of thegasket. Please consult STRAUB for advice.

3.4 Sealing sleeves

3.4.1 Quality and fields of application

3.4.2 Temperature range

Material Quality Application field

EPDM all water qualitiesEthylene - Propylen sewage, air, solids, various

Diene Monomer chemical products

Other elastomer Application / chemicalgrades on request chest on request.

for higher temperaturesVITON A and other chemical applications.

Available in a limited size regesty

STRAUB-METAL-GRIP <219.1 mm -30/100 -20/80STRAUB-METAL-GRIP >219.1 mm -20/80 -20/80

STRAUB-REP 48.3 - 1219.2 mm -20/80 -20/80

STRAUB-FLEX 48.3 - 2032.0 mm -20/80 -20/80

STRAUB-PLAST-/COMBI-GRIP 40.0 - 160.0 mm -30/100 -20/80

Coupling type / Pipe OD [mm] EPDM [°C] NBR [°C] Viton A [°C]

STRAUB-GRIP-L 26.9 - 609.6 mm -20/80 -20/80STRAUB-GRIP-L 48.3, 60.3, 88.9, 114.3 mm -10/180

STRAUB-METAL-GRIP <8“ -22/212 -4/176STRAUB-METAL-GRIP >8“ -4/176 -4/176

STRAUB-REP 11/2“ - 48“ -4/176 -4/176

STRAUB-FLEX 11/2“ - 80“ -4/176 -4/176

STRAUB-PLAST-/COMBI-GRIP 11/4 - 6“ -22/212 -4/176

Coupling type / Pipe OD [inch] EPDM [°F] NBR [°F] Viton A [°F]

STRAUB-GRIP-L 3/4“ - 24“ -4/176 -4/176STRAUB-GRIP-L 11/2“, 2“, 3“, 4“ -14/356

Synthetic NBR gas, oil, fuels andelastomer Nitril - Butadien various hydrocarbon products


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3.4.3 Life expectancy

The life expectancy of STRAUB pipe joints and STRAUB repair clamps fitted with sealing sleeves made ofNBR or EPDM extend to 25 year or more, provided that recommended storage procedures are correctlyadhered to. See below for details.

Due to the many years of STRAUB experiance we are offering as the only coupling manufacturer a5 year warranty. (within the limits mentioned under 4.3.2)

Application conditions

Increased temperature:The max. application temperature of EPDM is 125°C/250°F and NBR 100°C/230°F, but as a consequencethe life span will be reduced. In addition dynamical and chemical stress has to be taken intoconsideration as well. For different application please verify the life expectancy by the manufacturer.

Low temperature:Subject to performance requirements the elasticity of STRAUB sealing sleeves is sufficient to cope withtemperatures down to -30°C/-22°F. There is a loss of elasticity below this point which, under the stress ofadditional dynamic loading, can result in disruption of the elastomer.

The coupling casing and the anchoring ring (GRIP) completely enclose the sealing sleeve and thereforeprotect it from UV irradiation.

Because of their progressive sealing effect, STRAUB sealing sleeves require a smaller tightening forceand therefore subjected to less stress than, say, a flange seal. The elasticity and hence the working lifeof STRAUB sealing sleeves is consquently maintained over a longer period.

Storage

Recommended long term storage conditions:

w avoid exposure to direct sunlight

w store at consistent temperatures (maximum 40°C/104°F)

w the relative humidity should be kept above 50 %

w protect from dirt or soiling

E / 180014


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3.5 Material specifications and corrosion resistance

1) Class of material: DIN 86128, ISO/NP 15837+15838, ASTM F1476/F15

2) PRE = Pitting Resistance Equivalent (> 26 sea water resistent)

Material Class Old krupp Steel notation PRE2) Sensitivitysub group of norm compared

mate- with hole andrial 1) ASTM crack corrosion

Parts BS DIN NF AISI

FE 1 1 (SMO254) 1.4547 - S31254 35 extremly low

2 - 1.3964 - - 33 very low

318S13 1.4462 Z3CND22-05AZ S31803 33

3 very low

4 W5 V4A 316S31 1.4401 Z6CND17-11 316 25 low

W5 V4A 316S11 1.4404 Z2CND17-12 316L 26

W5 V4A - 1.4435 - 316L 28W5 V4A 320S31 1.4571 Z6CNDT17-12 316Ti 27

FE 2 W4 V2A 304S16 1.4301 Z5CN18-09 304 19 high

W4 V2A 301S21 1.4310 Z12CN17-07 301 19

W2 1.0737 <5 very high

W1 - 1.0570 - - <5 very high

Class of material

W1 W2 W4 W5Couplingcomponents

Class of material

W1 W2 W4 W5Type of STRAUBcoupling

GRIP-L - - - X

METAL-GRIP X X X -

PLAST-/COMBI-GRIP - X X -

FLEX / REP X X - X

Casing 1.0570, hot dip galv. 1.4301 1.4301 1.4571

Screws 1.7220 1.7220 1.4404/1.4435 1.4404/1.4435

Bolts 1.0737, galvanized 1.0737, galvanized 1.4404/1.4435 1.4404/1.4435

Strip insert 1.4435 1.4435 1.4435 1.4435

3.5.1 Material specifications STRAUB pipe joint


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3.6 Space requirements

The compact design of STRAUB pipe couplings is a valuable feature in narrow trenches, ducts, betweendecks of ships or when inserting new pipework in existing installations.

The compact dimensions of STRAUB products together with ability to position the bolts in any orientationenable placement and space savings of up to 50 % in comparison with traditional pipe connectingmethods such as flanges, etc.

Space savings in comparison toflanged pipeline in stainless steel:

0.8 m at 10 parallel mountedpipelines Ø 88.9 mm

Benefits:

w More space for the creww accessiblew Quick to repair


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E / 180021

FLEX

3.7 Damping Properties

Due to the high amount of sealing rubber and based on the progressive anchoring and sealingmechanism, high damping effects are achieved. No additional compensation needed.

Electro-dynamic oscillating circuit tests at the turbinemanufacturers site are proving damping values asshown:

Frequency 5 - 1000 HzSTRAUB-GRIP 1 : 0.44STRAUB-FLEX 1 : 0.13

Electrodynamic oscillating circuit testing

Above mentioned system is showing remarkable advantages in comparison to flanges:

Positive values reflect vibration damping and negative values vibration reinforcement.

STRAUB FLEX

FLANGE

Sensor-testing proves remarkable acousticbenefits:Up to 5 times better sound absorp-tion by STRAUB-FLEX as compared toflanges.

METAL-GRIP

Welded

Flange

3.7.1 Noise- and Vibration damping


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Application Benefits

a) On oscillating machines like engines, gears, turbines, generators etc.

Benefits:

w No tension transfer

w Interrupts oscillating circuits

w No loadfractures

w Increased life expectancy

b) For transitions between oscillating and rigid installations like engine to hull, pump to pipeline, fuelpump to feeds etc.

Benefits:

w Stress-free installation

w Flexible pipe system

w Coupling and compensator in one

w Quick detachable

MAN/B+W Diesel L40/54 „MS Greitje“STRAUB-FLEX 2L 525 mm on load air line

E / 180021

ABB, Switzerland - Lok 2000 / Cooling systemSTRAUB-FLEX 76.1 mm


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Amplitude 0 - 16 bar / 0 - 232 psiFrequency 0.5 HzSTRAUB-GRIP L 660’000 Cycles

Hammer Drop 1 mWeight 1700 kgAcceleration ~ 150g

3.7.3 Shock resistance

Pressure pulsation testing by the French Navy:

Benefits:

w Resistant against underwater blasts

w Acts flexible during collisions

w Tight even under deformed condition

w Increased life time due to tension free pipesystems

Earth quake Research Laboratory at NipponFoundation:

1000 gal* without damage(*gal = Dimension for accel.)

Acceleration 140 g surface shipsAcceleration 200 g submarines (For CuNiFe and steel pipes)

3.7.2 Balancing of pressure surges

Generating a pressure surge of 13 bar by 25 kg hammer.Results in a four times lower value than flanges.

Benefits:

w No retightening of bolts

w Increased life expectancy

w Pipeline elasticity

w No additional compensating costs

Shock Test WTD71/BWB BV0440:

Medium weight anvil shock test machineCanadian Departement of National Denfense:

E / 180021


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3.8 Installation times and dimension comparison

The installation time includes:

s Marking of half the coupling width on both pipe endss Fitting the coupling over pipe ends and correct alignments Tightening the bolts with a torque wrench

Pipe AD Nominal width Fitting time Metric IPS Metric IPS per coupling

[mm] [inch] [DN] [Nom] [min]

standard diameter

26.9 1.050 20 3/4 230.0 1.180 25 1.2 233.7 1.325 25 1 238.0 1.495 32 1.5 242.4 1.670 32 1 1/4 244.5 1.750 40 1.75 248.3 1.900 40 1 1/2 254.0 2.125 50 2.125 357.0 2.245 50 2.25 360.3 2.375 50 2 366.6 2.625 65 2 1/2 473.0 2.875 65 2 1/2 476.1 (3.000) 65 (3O.D.) 479.5 3.125 65 3 484.0 3.305 80 3.3 488.9 3.500 80 3 4100.6 3.960 80 (3) 5101.6 (4.000) 90 (3 1/2) 5104.0 4.095 100 4.1 5104.8 4.125 100 (4) 5108.0 4.250 100 4 1/4 5114.3 4.500 100 4 5127.0 5.000 100 4 1/2 6129.0 5.080 125 5 6130.2 5.125 125 (5) 6133.0 5.235 125 5 1/4 6139.7 (5.500) 125 (5 1/2) 6141.3 5.565 125 5 6154.0 6.065 150 6.1 7159.0 6.260 150 6 1/4 7168.3 6.625 150 6 7219.1 8.625 200 8 9244.5 9.625 225 9 10267.0 10.510 250 10.5 10273.0 10.750 250 10 10323.9 12.750 300 12 12355.6 14.000 350 14 12406.4 16.000 400 16 12457.2 18.000 450 18 12508.0 20.000 500 20 12558.8 22.000 550 22 12609.6 24.000 600 24 12


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3.9 Fitting / disassembly instructions STRAUB couplingsShort version. Please note complete fitting instruction for each type of coupling.

Additional corrosion protectionIf risk of corrosion exists, for long term pipe joint protection use shrink sleevesor protection tapes. Especially in case of couplings used underground.

ApplicationPipe joints can not take shearing forces (see installationconsideration). STRAUB pipe joints are maintenance-free, i.e. neverretighten bolts. Contact factory for minimal wall thickness of pipe.

A Preparation

De-burr and remove sharp edges from pipe ends. Clean the pipe surfacefrom impurities (bad coating). ð No loose matter under sealing lips.

Mark half-width of pipe joint on both pipe ends as fitting guide.

Remove plastic packing straps fitted and fit the pipe joint over the pipeend.

ð Do not dismantle the pipe joint.

ð Do not drop the pipe joint.

i�

�

�

Band insertsare used in case of:w large distance between pipe ends w vacuumw swelling due to agressive liquids w under external pressureBand inserts are extra and must be ordered separately(Contact factory).

Linear misalignment1 % of outside diameter (max. 3 mm / 0.12“) is admissible. Larger misalign-ment must be rectified into angular deflection (cardan link).

Angular deflection αsee Chapter 4.6 and 5.5

�

B Pipe alignment

Pipe-ADsee chapter 4.4 and 5.3

�

�

Outside diameter differenceup to Ø 100 mm ð 2 mm up to Ø 3.94“ ð 0.08“from Ø 100 mm ð 2 % from Ø 3.94“ ð 2 %from Ø 300 mm ð 6 mm from Ø 11.81“ ð 0.24“

�


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C Bolting

Do not work above limits �- � or acummulate. Limits are for static loadsand radial rigid pipes only. For dynamic forces like pressure surges and thrustapply safety factor (Contact factory).

Tighten the locking bolts with a torque wrench to the final prescribed torquerate engraved on the pipe joint’s outer surface. The torque wrench must be setto the value accordingly.

Failure prevention: Do not tighten bolts above prescribed torque rate.Trouble shooting: In case of leakage clean pipe and sealing lips surface beforeinstalling pipe joint again. Detachable and reusable (see disassemblyinstruction.). Test pressure = 1,5 x nominal pressure

�

�

�

Safety measures before removing pipe joint

Disassembly

No pressure on pipe joint. Drain pipeline. Protect yourself against spilling liquid.Make sure pipe joint is not supporting pipe ends.

Loosen screws alternately but do not remove completely.Do not rotate pipe joint on pipe as long as teeth are engaged.

�

�

Loosen teeth engagement

Remove pipe joint

Insert tool and underneath casing and lift.Caution! Do not harm sealing sleeve.

Slide pipe joint to the side.Caution! Sealing lip may touch pipe end. Turn and move pipe joint smoothly.Clean pipe joint an re-lubricate bolts with an appropriate lubricant beforerefitting.

�

�

Do not rotate pipe joint on the pipe once teeth are engaged.

Adjust pipe joint then tighten bolts lightly and alternately with a ratchedwrench or powered .


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E / 180033

(Setting gap between pipe ends see chapter 4.5 and 5.4)

3.10 Setting gap between pipe ends due to angular deflection α

AD 1 2 4 6 8 10 12 AD 1 2 3 4 6 8

Ø R R R R R R R Ø R R R R R Rmm mm mm mm mm mm mm mm mm mm mm mm mm mm mm

26.9 0.5 1 2 3 4 5 6 180.0 3 6 9 13 19 25

30.0 0.5 1 2 3 4 5 6 200.0 4 7 11 14 21 28

33.7 0.5 1 2 3 4 6 7 219.1 4 8 12 15 23 31

38.0 1 1 3 4 5 7 8 244.5 4 9 13 17 26 34

40.0 1 1 3 4 6 7 8 250.0 4 9 13 17 26 35

42.4 1 2 3 4 6 7 9 267.0 5 9 14 19 28 37

44.5 1 2 3 5 6 8 9 273.0 5 10 14 19 29 38

48.3 1 2 3 5 7 8 10 304.0 5 11 16 21 32 42

50.0 1 2 4 5 7 9 11 323.9 6 11 17 23 34 45

54.0 1 2 4 6 8 9 11 355.6 6 12 19 25 37 50

57.0 1 2 4 6 8 10 12 406.4 7 14 21 28 43 57

60.3 1 2 4 6 8 11 13 457.2 8 16 24 32 48

63.0 1 2 4 7 9 11 13 508.0 9 18 27 36 53

75.0 1 3 5 8 11 13 16 559.0 10 20 29 39 59

76.1 1 3 5 8 11 13 16 575.0 10 20 30 40

84.0 2 3 6 9 12 15 18 609.6 11 21 32 43

88.9 2 3 6 9 12 16 19 711.2 12 25 37 50

90.0 2 3 6 9 13 16 19 762.0 13 27 40 53

104.0 2 4 7 11 15 18 22 812.8 14 28 43 57

108.0 2 4 8 11 15 19 23 914.4 16 32 48

110.0 2 4 8 12 15 19 23 1’016.0 18 36 53

114.3 2 4 8 12 16 20 24 1’117.6 20 39 59

125.0 2 4 9 13 17 22 26 1’219.2 21 43

129.0 2 5 9 14 18 23 27 1’320.8 23 46

133.0 2 5 9 14 19 23 28 1’422.4 25 50

139.7 2 5 10 15 20 24 29 1’524.0 27 53

140.0 2 5 10 15 20 24 29 1’625.6 28 57

154.0 3 5 11 16 22 27 32 1’727.2 30

159.0 3 6 11 17 22 28 33 1’828.8 32

160.0 3 6 11 17 22 28 33 1’930.4 34

168.3 3 6 12 18 24 30 35 2’032.0 36

α in degree α in degree

Metric


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US / 180033

OD 1 2 4 6 8 10 12 OD 1 2 3 4 6 8

Ø R R R R R R R Ø R R R R R R inch mm inch inch inch inch inch inch inch inch mm inch inch inch inch inch inch

3/4“ 26.9 0.02 0.04 0.08 0.12 0.16 0.20 0.24 7.1“* 180.0 0.12 0.24 0.35 0.51 0.75 0.98

1.2“ 30.0 0.02 0.04 0.08 0.12 0.16 0.20 0.24 7.9“* 200.0 0.16 0.28 0.43 0.55 0.83 1.10

1“ 33.7 0.02 0.04 0.08 0.12 0.16 0.24 0.28 8“ 219.1 0.16 0.31 0.47 0.59 0.91 1.22

11/2“* 38.0 0.04 0.04 0.12 0.16 0.20 0.28 0.31 9“ 244.5 0.16 0.35 0.51 0.67 1.02 1.34

11/4“** 40.0 0.04 0.04 0.12 0.16 0.24 0.28 0.31 9.8“* 250.0 0.16 0.35 0.51 0.67 1.02 1.38

11/4“ 42.4 0.04 0.08 0.12 0.16 0.24 0.28 0.35 10.5“* 267.0 0.20 0.35 0.55 0.75 1.10 1.46

13/4“* 44.5 0.04 0.08 0.12 0.20 0.24 0.31 0.35 10“ 273.0 0.20 0.40 0.55 0.75 1.14 1.50

11/2“ 48.3 0.04 0.08 0.12 0.20 0.28 0.31 0.40 12“* 304.0 0.20 0.43 0.63 0.83 1.26 1.65

11/2“** 50.0 0.04 0.08 0.16 0.20 0.28 0.35 0.43 12“ 323.9 0.24 0.43 0.67 0.91 1.34 1.77

21/8“* 54.0 0.04 0.08 0.16 0.24 0.31 0.35 0.43 14“ 355.6 0.24 0.47 0.75 0.98 1.46 1.97

21/4“* 57.0 0.04 0.08 0.16 0.24 0.31 0.40 0.47 16“ 406.4 0.28 0.55 0.83 1.10 1.69 2.24

2“ 60.3 0.04 0.08 0.16 0.24 0.31 0.43 0.51 18“ 457.2 0.31 0.63 0.95 1.26 1.89

2“** 63.0 0.04 0.08 0.16 0.28 0.35 0.43 0.51 20“ 508.0 0.35 0.71 1.06 1.42 2.09

21/2“** 75.0 0.04 0.12 0.20 0.31 0.43 0.51 0.63 22“ 558.8 0.40 0.79 1.14 1.54 2.32

3“* 76.1 0.04 0.12 0.20 0.31 0.43 0.51 0.63 22.6“ 575.0 0.40 0.79 1.18 1.57

3.3“* 84.0 0.08 0.12 0.24 0.35 0.47 0.59 0.71 24“ 609.6 0.43 0.83 1.26 1.69

3“ 88.9 0.08 0.12 0.24 0.35 0.47 0.63 0.75 28“ 711.2 0.47 0.98 1.46 1.97

3“** 90.0 0.08 0.12 0.24 0.35 0.5 0.63 0.75 30“ 762.0 0.51 1.06 1.57 2.09

4.1“* 104.0 0.08 0.16 0.28 0.43 0.59 0.71 0.87 32“ 812.8 0.55 1.10 1.69 2.24

41/4“* 108.0 0.08 0.16 0.31 0.43 0.59 0.75 0.91 36“ 914.4 0.63 1.26 1.89

4“** 110.0 0.08 0.16 0.31 0.47 0.59 0.75 0.91 40“ 1016.0 0.71 1.42 2.09

4“ 114.3 0.08 0.16 0.31 0.47 0.63 0.79 0.95 44“ 1117.6 0.79 1.54 2.32

4.9“ 125.0 0.08 0.16 0.35 0.51 0.67 0.87 1.02 48“ 1219.2 0.83 1.69

5.1“* 129.0 0.08 0.20 0.35 0.55 0.71 0.91 1.06 52“ 1320.8 0.91 1.81

51/4“* 133.0 0.08 0.20 0.35 0.55 0.75 0.91 1.10 56“ 1422.4 0.98 1.97

51/2“* 139.7 0.08 0.20 0.40 0.59 0.79 0.95 1.14 60“ 1524.0 1.06 2.09

5“** 140.0 0.08 0.20 0.40 0.59 0.79 0.95 1.14 64“ 1625.6 1.10 2.24

6.1“* 154.0 0.12 0.20 0.43 0.63 0.87 1.06 1.26 68“ 1727.2 1.18

61/4“* 159.0 0.12 0.24 0.43 0.67 0.87 1.10 1.30 72“ 1828.8 1.26

6“** 160.0 0.12 0.24 0.43 0.67 0.87 1.10 1.30 76“ 1930.4 1.34

6“ 168.3 0.12 0.24 0.47 0.71 0.95 1.18 1.38 80“ 2032.0 1.42

α in degree α in degree

Imperial

* All items marked * are shown with actual pipe outside diameters, and are for non-standard pipesizes. All shown in bold type are standard pipe sizes.

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


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3.11 Minimum wall thickness for stainless steel and copper nickel pipes

The progressive anchoring effect of the STRAUB GRIP couplings requires a minimum wall thickness of thepipes.

According to IACS-URP 1/2 and ISO standards.For other pipe dimensions, varying pipe materials, pipe wall thicknesses and pressure rates pleasecontact the STRAUB Applications Department.

E / 180035

Pipe OD Minimum wall thickness

Metric[mm]

IPS[inch]

IPS[Nom]

Stainless steelSTRAUB-GRIP-L

STRAUB-METAL-GRIP

CuNi10 Fe (DIN)CuNi10 Mn1Fe (ISO)

Alloy No. 706STRAUB-GRIP-L

26.9 1.050 3/4"30.0 1.180 1.2" 1.5 mm / 0.059"33.7 1.325 1"38.0 1.495 1 1/2"42.4 1.670 1 1/4" 2.0 mm / 0.078"44.5 1.750 1 3/4"48.3 1.900 1 1/2"54.0 2.125 2 1/8" 2.3 mm / 0.090"57.0 2.245 2 1/4"60.3 2.375 2"73.0 2.875 2 1/2" 3.0 mm / 0.118"76.1 (3.000) 3"84.0 3.305 3.3"88.9 3.500 3" 3.5 mm / 0.138"100.6 3.960 3.96"101.6 (4.000) 3 1/2"104.0 4.095 4.1"104.8 4.125 4.13"108.0 4.250 4 1/4"114.3 4.500 4"127.0 5.000 5"129.0 5.080 5.1"130.2 5.125 5.13"133.0 5.235 5 1/4"139.7 (5.500) 5 1/2"141.3 5.565 5.56"154.0 6.065 6.1"159.0 6.260 6 1/4"168.3 6.625 6"193.7 6.732 7"219.1 8.625 8"


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3.12 STRAUB - Forces to avoid

LLoad

KKnee

Axial force FA

Weight FR

Axial buckling load FK

Not absorbed by STRAUB FLEX/REP- Sliding Support (M)

FForce

Not absorbed by STRAUB FLEX and GRIP- Anchor point (A)

Not absorbed by STRAUB FLEX and GRIP- Anchor point (A)


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Jam nut

Jam nut

Type

3.13 Products and Features

Features Portrayal

STRAUB-FLEX Coupling without axial restraint

STRAUB-GRIP Couplingaxial restraint withanchoring ring

Support / Hanger free on all sides

Sliding Support axial free, guided

Fix pointto absorb the reactionforces of STRAUB-FLEXCouplings

Anchor point

to absorb thereaction forces ofFLEX Couplings andthe forces due tointernal pressure

Fricionallynot engaged

Counter nut

Fricionallyengaged

Fricionallyengaged

3. properties - straub 3-e.pdf · technical manual 3/03 page 13 properties 3.5 material...

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