Flexibility Concerns when Connecting Watermains to Appurtenances
Flexibility Concerns when Connecting Watermains to Appurtenances
(OP)
Could someone also advise me on joint flexibility?
I understand a mechanical joint has some flexibility to it. So connecting an appurtenance such as a gate valve to a watermain using a mechanical joints is probably straightforward.
But a flanged joint is rigid, so if a gate valve is connected to a watermain using a flange, then some kind of flexible connection must exist immediately up and downstream of the valve, right? Could a push-on pipe joint be considered flexible enough? If so, how close would it have to be to the flange?
How about a hydrant lead connected to a main using a welded retainer gland. A rigid connection, but not a significant concern?
Thanks
I understand a mechanical joint has some flexibility to it. So connecting an appurtenance such as a gate valve to a watermain using a mechanical joints is probably straightforward.
But a flanged joint is rigid, so if a gate valve is connected to a watermain using a flange, then some kind of flexible connection must exist immediately up and downstream of the valve, right? Could a push-on pipe joint be considered flexible enough? If so, how close would it have to be to the flange?
How about a hydrant lead connected to a main using a welded retainer gland. A rigid connection, but not a significant concern?
Thanks





RE: Flexibility Concerns when Connecting Watermains to Appurtenances
For ductile iron pipe, push-on or mechanical joints are the most common joints used for buried water main service. These pipes allow some flexibility (2 to 5 Degrees depending on pipe size) at the joints. Except in certain soils, the joints are not required to support the weight of the pipe.
RE: Flexibility Concerns when Connecting Watermains to Appurtenances
RE: Flexibility Concerns when Connecting Watermains to Appurtenances