Home || Diesel Engines
||Boilers||Feed Systems
||Steam Turbines ||Fuel Treatment ||Pumps ||Refrigeration ||
Piping systems for cargo ship's machinery spaces
A ship's machinery space contains hundreds of metres of piping and
fittings. The various systems are arranged to carry many different
liquids at various temperatures and pressures. The influences of
operational and safety requirements, as well as legislation, result in
somewhat complicated arrangements of what are a few basic fittings.
Valves, strainers, branch pipes, etc., are examples of fittings which are
found in a pipe system.
Pipes
Machinery space pipework is made up of assorted straight lengths and
bends joined by flanges with an appropriate gasket or joint between, or
very small-bore piping may use compression couplings. The piping
material will be chosen to suit the liquid carried and the system
conditions. Some examples are shown below .
Where piping is to be galvanised, the completed pipe with all joints
fully welded is to be hot dipped galvanised. The pipes are supported
and held in by hangers or pipe clips in such a way as to minimise
vibration. Steam pipes or pipes in systems with considerable temperature
variation may be supported on spring hangers which permit a
degree of movement. An alternative to spring hangers is the use of
expansion loops of piping or an expansion joint.
Machinery space pipework material
Waste steam :Carbon steel to BS 3601
SW circulating :Aluminium brass
Wash deck and firemain :Carbon steel to BS3601 — galvanised
Bilge and ballast :Carbon steel to BS3601 - galvanised
Control air :Copper
Starting air :Carbon steel to BS 3602
All system pipework throughout the vessel is to be periodically inspected for condition and security in a systematic manner and be reported upon in the PMS. It is of utmost importance to include in these inspections the pipework located in those spaces that are remote, poorly lit and may be difficult to access.
Particular attention should be paid to sea water pipework which may be subject to corrosion and wastage on both internal and external surfaces, and opportunity should be taken whenever possible, and certainly during drydocking periods, to establish pipewall condition by hammer testing and visual inspection of internal surfaces in locations where valves or pipe sections have been removed for routine maintenance, repair or replacement.
Defective pipework is to be replaced at the earliest convenient opportunity.
Related Info:
Various pipe fittings and their use in ships piping systems
Displacement pumps principles and working procedure
Centrifugal pump principles and working procedure
Machinery Spaces.com is about handling of cargo ships machinery, on board safety procedures, principles and operational guidance for engineers working on board and those who working ashore . For any remarks please
Contact us
Copyright © 2010 Machinery Spaces.com All rights reserved.
