Connecting steel and aluminum pipe
Connecting steel and aluminum pipe
(OP)
Has anyone ever designed a connection between steel and aluminum pipe? I have an upcoming project where I will be designing a connection between a new steel pipeline and an existing aluminum pipeline (reclaimed water pipelines). Does anyone make couplings designed specifically for connecting these types of pipes together? Is there anything specific to look out for when designing this type of connection? Any help would be much appreciated. Thanks!





RE: Connecting steel and aluminum pipe
RE: Connecting steel and aluminum pipe
1. Check the OD's of the pipes. This could have a bearing on the method of connection.
2. Is the connection pressurized?
3. Is it buried or above grade?
4. Do you need to transfer any load across the joint such as pressure thrust or weight of one pipe to the other?
5. Is there any movement or vibration happening, including thermal expansion?
In order to totally avoid galvanic corrosion, there must be no metal to metal contact- not even bronze. There can be no conductivity across the joint.
Would there be a reason not to use PVC pipe as an intermediate?
The rate of corrosion on the steel would be amplified if there is a little steel connected to a lot of aluminum. Conversely if there is a little aluminum connected to a lot of steel, the corrosion would be reduced.
Is this municipal or industrial? Industry might be willing to replace a steel pipe every X number of years.
Check Fernco products for rubber, non pressure, non conductive, inexpensive couplings.
Check General Rubber for rubber joints that allow movement and will hold pressure.
Dresser or Romac hold pressure and allow a little movement. May not be able to completely insulate these. could be a good choice depending on the application.
You need to answer some of these questions before making a decision.
Call a pipe and fittings supply house. They can give a lot of advice.
Hope this helps.