The Largest Manufacturer of Pipe couplings, Flange Adaptors, Stepped Couplings, Dismantling Joints and related products in the Southern Hemisphere
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NEWS FLASH
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Launch of our all New SHOULDERED COUPLING
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Launch of our all New
REPAIR CLAMPS
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STEPPED COUPLINGS

Where pipe ends of different outside diameters have to be connected, Stepped Couplings can be provided. These normally cover the difference between the outside diameters of pipes of different materials of construction with a common nominal bore, or pipes of the same materials having different nominal bores.

It is advisable to mark the pipe a known distance from the end when fitting a Stepped Coupling to enable inspection of movement. This will allow the inspector to ensure that no telescoping along the smaller diameter pipe has occurred.
 

When this fitting is used as a Coupling between two pipes with diameter differences exceeding 25mm it is essential to ensure that the Stepped Coupling cannot be forced along the smaller diameter pipe. Scheduled sizes will not normally require such precautions, but others may. Regular inspection of a pipe previously marked, is normally all that is required. Alternatively, where this cannot be arranged, a mechanical means should be employed.

Pressure rating for Stepped Couplings are equivalent to the rating specified in the Straight Coupling schedules, for the larger of the two OD's. In the case of ductile iron, AC and uPVC pipes, the pressure rating will match the pipe rating.

KLAMFLEX Stepped Couplings can be manufactured with full sleeves to prevent end pullout on PE, HDPE and GRP pipes.
 


Where pipe OD sizes are negligible
 
KLAMFLEX STEPPED COUPLIINGS
NOM
BORE
Pipe 1
mm 		NOM
BORE
Pipe
2 mm		 PIPE
Od1
mm 		PIPE
Od1 mm 		Description
L
MIN
mm
A1
mm
A2
mm
B
mm
D
mm
MAX TEST
PRESSURE BAR
50 65 60.3 76.1 STEEL/STEEL 100 133 148 172 102 x 6.4 24
140 160 140 160 uPVC/uPVC 100 224 246 172 102 x 7.2 24
200 200 200 219 uPVC/STEEL 100 292 311 172 102 x 8.7 24
315 300 315 324 uPVC/STEEL 100 407 419 172 102 x 8.7 24
300 300 353 365 FC30/FC24 120 458 470 260 178 x 8.7 24
600 600 651 672 FC18/FC12 140 756 777 260 178 x 8.7 24
700 700 760 784 FC18/FC12 140 875 889 260 178 x 11.1 24
1000 1000 1062 1084 FC12/FC06 160 1177 1199 260 178 x 11.1 24

 


Where the pipe OD differs to a greater extent a profile plate is used
 
KLAMFLEX STEPPED COUPLIINGS
NOM
BORE
Pipe 1
mm 		NOM
BORE
Pipe
2 mm		 PIPE
Od1
mm 		PIPE
Od1 mm 		Description
L
MIN
mm
A1
mm
A2
mm
B
mm
D
mm
MAX TEST
PRESSURE BAR
65 80 76.1 96 STEEL/FC 100 148 148 170 188 24
160 150 160 174 uPVC/FC18 100 246 266 190 112 24
150 200 177 232 FC/FC 100 270 324 190 112 24
250 250 273 273 STEEL/FC36 100 367 410 190 112 24
355 350 355 355 uPVC/DI 120 460 483 270 188 24
600 600 610 610 STEEL/FC18 150 714 776 270 188 24
700 750 711 762 STEEL/DI 150 815 877 270 188 24
1100 1100 1118 1188 FC/STEEL 160 1233 1303 276 194 24
FOR COUPLINGS OF 25 AND 40 BAR WORKING PRESSURE PLEASE CONTACT KLAMFLEX
THE ABOVE TABLE INCLUDES SAMPLES OF THE SIZES AVAILABLE, PLEASE CONTACT KLAMFLEX FOR ANY OTHER SIZES.
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