Q.How to find the maximum loading rate of the ship?

Answer 2 Answers

Where a number of tanks are loaded through a common manifold, the maximum loading rate may be determined by the flow rate through the manifold/drop lines.  Therefore you need to do an additional exercise basis the vetting arrangements + flow rates in order to find what is the max loading rate per manifold, for homogenous cargo (loading in all tanks or min 4 tanks).


As per ISGOTT :


* A loading rate based on a linear velocity of 12 metres/second for loading non-static accumulator cargoes and also for loading static accumulator cargoes into inerted tanks. This velocity is provided for guidance only and is generally considered as a rate above which pipeline erosion may occur at pipe joints and bends.


Considering that if yr vessel's size of manifold/drop lines is 16" or 406 mm as per the attached from ISGOTT yr ship can load 5600 m3 per hour with 1 manifold. Basis loading in 4 tanks the ship can declare max loading rate homogenous cargo for 1 manifold 5333 m3/hr. 

Stefan Krivokapic

Stefan Krivokapic

Jun 3, 2021

how did you got 5600, with formula Q- A x V Q- 406 x 12 - 4872 m3/hrs Im only getting 4872 .

Tolga Atabey

P&A Manual and check the drop calculation on VECS manual

Vitalii Starshov

Vitalii Starshov

Jun 9, 2019

For example found in VESC manuals that in each tanks max loading rate is 450m3/h, but if I will load one grade full cargo, it will be 1200m3/h (Cargo tanks inerted).This is information in cargo plan. Can you please explain where have been took this figures 1200m3/h.