Klamflex - The experts in pipe fitting manufacture for worldwide distribution
Technical Data
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Brass Ring
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NEWS FLASH
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Special Ended Fittings

KLAMFLEX Special Ended Steel Fittings are available in various fitting combinations, such as Bends, Tees, Reducers, and Crosses. These fittings are manufactured by welding a KLAMFLEX Half Coupling to the ends of a steel fitting. Bolts are used in the coupling joint; this ensures easy replacement of damaged fasteners. KLAMFLEX makes use of a profile plate that is welded to the steel fitting or lugs that are welded to the coupling sleeve to accommodate the tightening process. With either option only one weld is required to fit the half coupling to the fitting. We offer the dedicated sleeve type or ranger sleeve type arrangement. Installation is effected by simply inserting the plain ended pipe into the KLAMFLEX Half Coupling and tightening the studs. The use of these fittings will result in significant cost savings and ease of installation, as only one piece of equipment is being purchased, instead of separate fittings and coupling.

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High Pressure Couplings

KLAMFLEX is currently undertaking an exercise on the design of the existing dedicated product range of Couplings, Flange Adaptors and Dismantling Joints that will enable Klamflex to supply high pressure items, in excess of a rating of 40 bar. This would include pressure diameter ratios of 50 Bar up to 2000nb, 64 Bar up to 1600nb and 100 bar up to 1400nb. Where necessary component material will be upgraded with regards to the mechanical and chemical composition as well as thicker sections would be used, to achieve the above.

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Dedicated Step Couplings

KLAMFLEX Dedicated Step Couplings join pipes of the same outside diameter. Couplings up to 324mm OD are delivered pre-assembled. Larger sizes are delivered ready for site assembly on the pipe. KLAMFLEX Couplings can be manufactured to suit both metric and imperial dimensions for Steel, uPVC, Ductile Iron, G.R.P., Fibre Cement, Stainless Steel, Aluminium Alloys and virtually all other rigid pipe materials. KLAMFLEX Couplings can be manufactured with double sleeves to prevent end pull out on HDPE and GRP pipes. The sizes shown in the schedules of dimensions are for guide purposes. KLAMFLEX’S manufacturing methods enable us to supply any size, including non-standard sizes.
  KLAMFLEX Couplings are pressure rated to the appropriate pipe standards. Working pressure is generally two-thirds of maximum test pressure shown in the schedules of dimensions. These pressures apply to a buried line with adequate thrust blocks or to pipelines above ground anchored at ends and at all changes of direction also secured against side thrusts at each joint. KLAMFLEX Couplings, though capable of accommodating reasonable expansion and contraction, do not mechanically prevent separation of pipe ends subject to end thrust, and this must be prevented by other means. To prevent separation of pipe ends, harness assemblies consisting of lugs for welding to adjacent pipes, and connecting tie rods can be supplied. Pipes must be anchored against end load, particularly when the pipeline is laid above ground. A buried pipeline normally needs anchoring only at abrupt changes in direction and at junctions or stop ends. Gaskets are of a EPDM rubber and are suitable for water and sewerage services, chemicals and dilute acids in the emperature range –50°C to +90°C. Other sealing materials can be used, increasing temperature range to greater than 90°C. These materials are available on request. KLAMFLEX Gaskets and Epoxy coatings are certified non toxic for potable water in accordance with BS 6920.
HARNESSED COUPLINGS


One method of preventing pipe separation is the use of a harness assembly, consisting of lugs for welding to steel pipes and restraining tie rods. Cast iron pipes can sometimes be harnessed through the use of additional flanges cast onto the pipe ends.

In most cases we can also supply KLAMFLEX Flange Adaptors complete with harness assembly. Four or more flange bolts are replaced with long tie bolts.


NB: KLAMFLEX Pipe Couplings supply the lugs, nuts, bolts and the Couplings/ Adaptor between Coupling and plinth to permit full assembly of all bolts.
ANCHORED COUPLINGS

With brackets welded to the centre sleeve, Couplings can be bolted directly to the supporting structure. Brackets are designed to withstand the thrust produced by maximum angularity and will support a 10m long pipe full of water (up to DN 1 500mm).

We recommend the use of locating centre registers with Anchored Couplings to help resist pipe movement. On steep slopes, special consideration should be given to anchorage.

  N.B.
  1. Harness rods are not normally used with Anchored Couplings
  2. Anchor brackets are not designed to withstand the full longitudinal or lateral forces produced by internal pressure
  3. Ensure that sufficient clearance is allowed between Coupling and plinth to permit full assembly of all bolts

The Centre Sleeve can be supplied with or without internal centre register studs. The registers provide a locating stop to centre the Coupling which facilitates the laying of long pipe runs. Centre Registers also prevent the possibility of the Coupling creeping at positions where there are continual axial movements. Couplings without Centre Register are unecessary for fitting closing lengths on a pipeline, or for withdrawing any particular length for cleaning or inspection. Locating plugs may be fitted to Couplings to act as removable Centre Registers, thus providing the advantage of both types.

Centre Registers are used in Couplings above ground where there may be a tendency for the Coupling to creep e.g. on an incline.

Centre Registers are of two types: (A) removable, used where the Coupling can be moved along the pipe to allow the pipe to be inspected, and (B) fixed, used where there is no need to remove Couplings.

Where locating plugs are used, the setting gap should be increased by 9,5mm for sizes up to 324mm and 12.5mm for sizes above 324mm OD to avoid contact with the plugs.
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Product Specification
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Dedicated Step Couplings
DUCTILE IRON PIPE ISO 2531:1991 BS 4772:1988
FOR 10 & 16 BAR WORKING PRESSURE
NOM BORE mm PIPE OD mm TOLERANCE
ON PIPE OD
FOR  PREPARED
END mm 		MINIMUM PIPE
END
PREPARED
LENGTH
 L mm 		OD OF ENDRING
A
mm		 COUPLING LENGTH
B
mm		 SLEEVE  WIDTH
D
mm		 STANDARD  TEST  PRESSURE
10 bar
working
pressure		 16 bar
working
pressure
APPROX. MASS
Kg
80 98 +1.0 -3.0 100 158 178 102 15
24
 3.6
100 118 +1.0 -3.0 100 200 178 102 15 
24
4.4
125 141 +1.0 -3.0 100 220 178 102 15 
24
6.1
150 170 +1.0 -3.0 100 260 178 102 15 
24
6
200 222 +1.0 -3.5 100 308 178 102 15 
24
7.9
250 247 +1.0 -3.5 100 364 178 102 15 
24
10.6
300 326 +1.0 -3.5 100 414 178 102 15 
24
 11.7
350 378 +1.0 -3.5 150 480 262 178 15 
24
29.4
400 429 +1.0 -4.0 150 531 262 178 15 
24
33.7
450 480 +1.0 -4.0 150 582 262 178 15 
24
37
500 532 1.0 -4.0 150 634 262 178 15 
24
41.3
600 635 +1.0 -4.5 150 737 262 178 15 
24
47.9
700 738 +1.0 -4.5 150 840 262 178 15 
24
56.4
800 842 +1.0 -4.5 150 944 262 178 15 
24
64
900 945 +1.0 -5.0 150 1047 262 178 15 
24
70.6
1000 1048 +1.0 -5.0 150 1150 262 178 15 
24
78.3
1100 1152 +1.0 -6.0 150 1268 262 178 15 
24
 115
1200 1255 +1.0 -6.0 150 1371 262 178 15 
24
124.9
1400 1462 +1.0 -6.0 150 1578 262 178 15 
24
144.2
1600 1668 +1.0 -6.0 150 1784 262 178 15 
24
164.3
1800 1875 +1.0 -6.0 150/300 1989 262/450 178/356 15 
24
TBA
2000 2082 +1.0 -6.0 150/300 2196 262/450 178/356 15
24
TBA
FOR COUPLINGS OF 25 & 40 BAR WORKING PRESSURE PLEASE CONTACT KLAMFLEX
THE ABOVE TABLE INCLUDES SAMPLES OF THE SIZES AVAILABLE, PLEASE CONTACT US FOR ANY OTHER SIZES.
 
Dedicated Step Couplings
STEEL PIPES: SABS 719:1971 SABS 62:1989 BS
FOR 10 & 16 BAR WORKING PRESSURE
NOM BORE mm PIPE OD mm TOLERANCE
ON PIPE OD
FOR  PREPARED
END mm 		MINIMUM PIPE
END
PREPARED
LENGTH
 L mm 		OD OF ENDRING
A
mm		 COUPLING LENGTH
B
mm		 SLEEVE  WIDTH
D
mm		 STANDARD  TEST  PRESSURE
10 bar
working
pressure		 16 bar
working
pressure
APPROX. MASS
Kg
50 60.3 +0.8 -0.8 100 134 178 83 15
24
2.2
65 76.1 +0.8 -0.8 100 150 178 102 15  24 2.7
80 88.9 +0.8 -0.8 100 158 178 102 15  24 3.3
100 114.3 +0.8 -0.8 100 174 178 102 15  24 4
125 139.7 +1.6 -0.8 100 220 178 102 15  24 6.1
150 165.1 +1.6 -0.8 100 246 178 102 15  24 5.4
150 168.3 +1.6 -0.8 100 246 178 102 15  24 5.4
200 219.1 +1.6 -0.8 100 308 178 102 15  24 7.9
225 244.5 +1.6 -0.8 100 338 178 102 15  24 10.6
250 267 +1.6 -0.8 100 360 178 102 15  24 11.4
250 273 +1.6 -0.8 100 364 178 102 15  24 10.6
300 323.9 +1.6 -0.8 100 414 178 102 15  24 11.6
350 355.6 +1.6 -1.6 150 458 262 178 15  24 28
400 406.4 +1.6 -1.6 150 509 262 178 15  24 31.3
450 457 +1.6 -1.6 150 559 262 178 15  24 35.5
500 508 +1.6 -1.6 150 610 262 178 15  24 39.6
550 559 +1.6 -1.6 150 661 262 178 15  24 42.9
600 609.6 +1.6 -1.6 150 712 262 178 15  24 46.3
650 660 +1.6 -1.6 150 762 262 178 15  24 49.4
700 711.2 +1.6 -1.6 150 814 262 178 15  24 53.7
750 762 +1.6 -1.6 150 864 262 178 15  24 58
800 812.8 +1.6 -1.6 150 915 262 178 15  24 61.3
850 864 +1.6 -1.6 150 966 262 178 15  24 65.4
900 914.4 +1.6 -1.6 150 1017 262 178 15 24 68.6
950 965 +1.6 -1.6 150 1067 262 178 15 24 72.9
1000 1016 +1.6 -1.6 150 1118 262 178 15 24 76
1050 1067 +1.6 -1.6 150 1169 262 178 15 24 79.4
1100 1118 +1.6 -1.6 150 1220 262 178 15  24 83.6
1200 1219 +1.6 -1.6 150 1335 262 178 15  24 121.8
1200 1235 +1.6 -1.6 150 1351 262 178 15  24 123.2
1400 1420 +1.6 -3 150 1536 262 178 15  24 140.4
1400 1422 +1.6 -3 150 1538 262 178 15  24 140.7
1500 1520 +1.6 -3 150 1636 262 178 15  24 150.2
1600 1620 +3 -3 150 1736 262 178 15  24 160
1600 1626 +3 -3 150 1742 262 178 15  24 160.6
1800 1820 +3 -3 150 1936 262 178 15  24 178.7
1800 1829 +3 -3 150 1945 262 178 15  24 179.4
2000 2020 +3 -3 150/300 2134 262/450 178/356 15  24 TBA
2100 2120 +3 -3 150/300 2234 262/450 178/356 15 24 TBA
2200 2230 +3 -3 150/300 2344 262/450 178/356 15 24 TBA
2400 2440 +3 -3 150/300 2554 262/450 178/356 15 24 TBA
2700 2740 +3 -3 150/300 2854 262/450 178/356 15 24 TBA
FOR COUPLINGS OF 25 & 40 BAR WORKING PRESSURE PLEASE CONTACT KLAMFLEX
THE ABOVE TABLE INCLUDES SAMPLES OF THE SIZES AVAILABLE, PLEASE CONTACT US FOR ANY OTHER SIZES.
 
Dedicated Step Couplings
uPVC PIPES:SABS 966:1976 ISO 161:1978
FOR 10 & 16 BAR WORKING PRESSURE
NOM BORE mm PIPE OD mm TOLERANCE
ON PIPE OD
FOR  PREPARED
END mm 		MINIMUM PIPE
END
PREPARED
LENGTH
 L mm 		OD OF ENDRING
A
mm		 COUPLING LENGTH
B
mm		 SLEEVE  WIDTH
D
mm		 STANDARD  TEST  PRESSURE
10 bar
working
pressure		 16 bar
working
pressure
APPROX. MASS
Kg
100 110 +1.0 -0.1 100 163 178 102 15  24 4.2
140 140 +1.0 -0.1 100 220 178 102 15  24 6.1
160 160 +1.0 -0.1 100 242 178 102 15  24 5.9
175 177.8 +1.0 -0.1 100 267 178 102 15  24 7.5
180 180 +1.0 -0.1 100 267 178 102 15  24 9.6
200 200 +1.0 -0.1 100 289 178 102 15  24 10
225 225 +1.0 -0.1 100 318 178 102 15  24 10.4
250 250 +1.0 -0.1 100 343 178 102 15  24 10.9
280 280 +1.0 -0.1 100 373 178 102 15  24 11.1
325 315 +1.0 -0.1 100 408 178 102 15  24 11.9
400 400 +1.0 -0.1 150 502 262 178 15  24 31
500 500 +1.0 -0.1 150 602 262 178 15  24 39.2
FOR COUPLINGS OF 25 & 40 BAR WORKING PRESSURE PLEASE CONTACT KLAMFLEX
THE ABOVE TABLE INCLUDES SAMPLES OF THE SIZES AVAILABLE, PLEASE CONTACT US FOR ANY OTHER SIZES.
 
Dedicated Step Couplings
FIBRE CEMENT PIPE FOR COD AND CID PIPE: SABS 1223:1985 ISO 160:1980
FOR 10 & 16 BAR WORKING PRESSURE
NOM BORE mm PIPE OD mm TOLERANCE
ON PIPE OD
FOR  PREPARED
END mm 		MINIMUM PIPE
END
PREPARED
LENGTH
 L mm 		OD OF ENDRING
A
mm		 COUPLING LENGTH
B
mm		 SLEEVE  WIDTH
D
mm		 STANDARD  TEST  PRESSURE
10 bar
working
pressure		 16 bar
working
pressure
APPROX. MASS
Kg
50 96 +0.6 -0.0 100 158 178 102 15 24 3.6
100 122 +0.6 -0.0 100 200 178 102 15  24 4.4
150 168 +0.6 -0.0 100 246 178 102 15  24 5.4
150 177 +0.6 -0.0 100 267 178 102 15  24 6.1
250 286 +0.6 -0.0 100 379 178 102 15  24 12
300 328 +0.6 -0.0 100 421 178 102 15  24 13.9
300 340 +0.6 -0.0 150 442 262 178 15  24 27.1
300 345 +0.6 -0.0 150 447 262 178 15  24 27.5
600 667 +1.0 -0.0 150 769 262 178 15  24 50
600 699 +1.0 -0.0 150 801 262 178 15  24 52.9
600 727 +1.0 -0.0 150 829 262 178 15  24 55.7
600 755 +1.0 -0.0 150 857 262 178 15  24 57.5
1100 1188 +1.2 -0.0 150 1304 262 178 15  24 118.1
FOR COUPLINGS OF 25 & 40 BAR WORKING PRESSURE PLEASE CONTACT KLAMFLEX
THE ABOVE TABLE INCLUDES SAMPLES OF THE SIZES AVAILABLE, PLEASE CONTACT US FOR ANY OTHER SIZES.
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