I have no plumbing background, but my guess would be that this pipe is a straight vertical pipe that has a maximum length and a minmum diameter.
What does a run-up pipe mean? Does it mean a vertical or straight pipe or something else?
Here is some context to help you find out.
Remove all packing material.
2.1. InstallationInstallation is accomplished by bolting the valve flange to the tank vent pipe's mating flange with a suitable gasket between. Check-lift to verify unobstructed movement of disc. Follow IMO MSC/Circ. 731 pressure drop calculation during system check to verify correct function.2.1.1 Service Restrictions:See CE certificate for:1. Maximum run-up pipe length.2. Minimum run-up pipe diameter.3. Minimum MESG of cargo vapour.4. Minimum pressure relief setting.5. Maximum outer ice-layer according to ISO 15364.6. Maximum fouling level: See the Product Review Document.Thank you.
The fragment is taken from operating/maintenance instructions for HS-ISO pressure valve.
I forwarded all the information you provided to an American friend who is a chemical engineer. Here's what he had to say:
It is not a term I have ever heard used before. That's pretty wierd.
I could likely figure out what they mean if I had further information. Sounds like a relief valve inlet line.
He's an engineer. Give him a break.
Last edited by probus; 05-Jun-2013 at 05:50.