If there is no flow then pipe size doesn't matter and pressure will be equal throughout. If there is flow then there will always be some pressure loss regardless of the size of the pipe, so you'd never be able to get 100psi at the end of the pipe. The pressure drop is dependent on flow rate. This is analogous to voltage drop across a resistor through which current is flowing. Bob Ammerman RAm Systems ----- Original Message ----- From: "Micro Eng" To: Sent: Friday, May 30, 2003 10:38 AM Subject: [OT]: website for sizing pipe for airlines? > Anyone ever come across a website that will help calculate the size of pipe > required for airlines in order to have a given pressure on the other end? > > For example, I have a 400' run of pipe, tied to a compressor tank, > pressurized to 100psi, and I want to be able to have the 100psi at the end > of the pipe run, so what size pipe do I need in order to obtain this?. The > values are just for example, but gives the general idea of what I am after. > > _________________________________________________________________ > Tired of spam? Get advanced junk mail protection with MSN 8. > http://join.msn.com/?page=features/junkmail > > -- > http://www.piclist.com#nomail Going offline? Don't AutoReply us! > email listserv@mitvma.mit.edu with SET PICList DIGEST in the body > -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body