Process Design Engineering Package Continued.....
8.0 UTILITIES:
Utility summary shall be provided to cover normal and maximum utility demands. Apart from continuous utility requirements,
complete data must be given on intermittent utility requirements during start-up and shutdowns and emergencies. Some items of a
utility summary require vendor design information such as steam for turbines or power for pumps: in such cases licensor shall use
good engineering judgement or in-house data in arriving at the summaries It is understood that final utility summaries are
responsibility of detailed engineering contractor. Utility summary shall be provided for each of the units separately.
Following utilities must be included in utility summary:
a) Steam and condensate, for each level of steam.
b) Power.
c) Cooling water.
d) Boiler Feed Water and Demineralized Water.
e) Inert Gas.
f) Instrument Air.
g) Fuel Gas / Fuel Oil.
9.0 CATALYST & CHEMICALS:
Information required are:
a) Catalyst name, characteristics (sufficient for procurement), initial loads, expected life, list of vendors.
b) Chemicals name, characteristics, function, annual consumptions, handling precautions. For specialty chemicals, list of
vendors has to be included.
For, catalyst procurement, Licensor shall also suggest the guarantees to be taken from catalyst supplier in addition to catalyst life.
10.0 EQUIPMENT LIST:
a) Equipment name.
b) Equipment service.
c) Special requirements such as critical or proprietary items, vendor list, etc.
11.0 EQUIPMENT PROCESS DATA SHEETS:
Each equipment service, major as well as minor, proprietary or otherwise, shall
be specified on individual equipment process data sheets. Data sheets shall
carry a document number and include equipment name service and identify
the case to which the data correspond. Process information shall include
information on process fluid, relevant physical property data, operating
conditions and mechanical design conditions. Information in the data sheet
shall be sufficient and incorporate adequate engineering judgement as
required, to carry out mechanical design of equipment at the very outset of
release of BDEP, with minimum rework during detailed engineering. The
following information will be provided for the specific types of equipment.
11.1 Heat Exchangers
a) Fluid flow rates of vapor / liquid / steam / water / non-condensable, density, viscosity, thermal conductivity, surface
tension (for two-phase conditions), critical temperature and pressure (for reboiled streams).
b) Operating temperature, pressure, heat duty considering limitation of fluid velocity, heat flux etc.
c) Fouling factor or cleanliness factor (to be reviewed with OWNER).
d) Allowable pressure drop. Thermal design of low pressure Heat exchanger is not included in licensor scope. However
Licensor shall indicate allowable pressure drop in Heat exchangers process data sheet.
e) Suggested heat exchanger type such as fixed head or floating head, channel type.
f) Mechanical design pressure and temperature and insulation requirements. Licensor shall follow good engineering practice in
evaluating system hydraulics and accordingly fix mechanical design conditions. It will be reasonably ensured that such design
conditions will not require to be raised upwards in the course of detailed engineering, with only the occasional exception.
g) Material of construction and corrosion allowance for shell and tube sides.
h) Expected number of fans and sections, in the case of air-cooled exchangers. In the case of other exchangers expected number of
shells have to be indicated. Such estimates shall be arrived at by conventional chemical engineering practice, rather than
detailed exchanger design.
i) For heat exchangers included in licensor scope for thermal / mechanical design, as per agreed scope of engineering
services, the details shall be complete to the extent relevant and necessary as per industry practice.
j) Possibility of considering' pitch controlled air fin condensers.