Stepped Coupling
Used in joining plain end pipes of different external diameter (limited to maximum 12mm difference).

Flange Adaptor
Custom made for joining and valves or other media.
Study on the pipes sizes will be conducted to ensure that the right adaptor beind produced.

*Important Note to Customers
To obtain the accurate fit insertion of the coupling and flange adaptor to the pipes, precise external diameter of the pipes to be connected are to be provided by users.

Attention should be on the accuracy of the external diameter of the pipes, espeacially existing old pipelines buried underground where historical information of such pipelines are unobtained and might not comply to any of the existing standard.

The specification of the Flange Adaptor in the pipes and valves is of great significant for the old pipelines.