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.
Installation 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.
The fragment is taken from operating/maintenance instructions for HS-ISO pressure valve.