1 Scope
This International Standard specifies requirements for two types, seven classes and
three grades of wire - or textile-reinforced dredging hoses with nominal sizes ranging
from 100 to 1 200. Within each class, all grades and sizes have the same maximum working
pressure. Such hoses are suitable for the delivery or suction of seawater or freshwater
mixed with silt, sand, coral and small stones with a specific gravity in the range
from 1,0 to 2,3 at ambient temperatures ranging from -10 °C to +40 °C.
This International Standard covers two types of hose, as follows:
-
— type 1: floating type, for delivery only, which includes flotation material to give
the hose buoyancy;
-
— type 2: submarine type for delivery and suction.
This International Standard does not specify requirements concerning the service life
of hoses or hose assemblies. Specifying such requirements is the responsibility of
the customer, in consultation with the hose manufacturer.