Stepped Coupling



Stepped Coupling

Stepped coupling is a “problem-solver” on any site with the ability to join pipes of different ODs and different materials.

Typical applications:

  • refurbishments (where the contractor is connecting a piping system back into the original layout)
  • repairs to old water mains (where the pipe is so corroded it needs to be replaced with a new material in metric size)
  • chamber connections
  • pipe material transitions
  • joining metallic pipe to plastic pipe


Material Selection

Type 1

Casing : AISI 304/DIN 1.4301
Fasteners : Alloy Steel, PTFE Coated
Gasked :EPOM/NBR/HNBR/Voton

Type 2

Casing : AISI 304/ DIN 1.4301
Fasteners : AISI 316/316L
Gasked : EPDM/NBR/HNBR/Viton

Type 3

Casing : AISI 316L/DIN 1.4404
Fasteners : AISI 316/ 316L
Gasked : EPDM/NBR/HNBR/Viton

Type 4

Casing : High Strenght Steel
Fasteners : Rilsan/PVC/Epoxy/Galvanized
Fasteners : Alloy Steel, PTFE Coated
Gasked : EPDM/NBR/HNBR/Viton

Type 5

Casing : High Strenght Steel
Fasteners : Rilsan/PVC/Epoxy/Galvanized
Fasteners : AISI 316/316L
Gasked : EPDM/NBR/HNBR/Viton

Sizes: 21.3mm to 711.0mm
Temperature: EPDM -40℃ to +100℃, NBR -20℃ to +80℃, HNBR -20℃ to +150℃, Viton -20℃ to +250℃
Pipe Materials: Carbon steel, stainless steel, copper, cunifer, cast and ductile iron, GRP, most plastics & other materials.