Process Design Engineering Package Continued.....
12.0 SAFETY & ENVIRONMENT RELATED INFORMATION:
a) Hazardous Chemicals:
Physical and chemical properties of hazardous streams and chemicals present in the unit to be defined in completeness.
Chemicals/ Materials Safety Data sheets to be included.
b) Safety Requirement:
Special safety requirement such as hydrogen/ H2S/ HC leak detectors and snuffing steam rings around leak prone flanges etc.
to be indicated wherever necessary. The number required along with the location to be identified. Guidelines for any specialized
fire protection and gas detection system for protection of equipment and personnel shall be provided conceptual layout & design of
fire-fighting system and personnel protective facilities to be provided by Licensor, showing recommended sensory instruments protective
apparatus etc. P&lD furnished in the Process Package would incorporate preventative measures for the identified hazards based on
HAZOP studies conducted by the Licensor. Process Package shall contain a description of the major potential hazards and safety system
employed to control those potential hazards.
c) Plant Waste Effluents:
All unit process waste effluents and by-products (gaseous* liquid and solid), produced continuously or intermittently,
to be identified with estimated quantities, physical and chemical characteristics (format shall be provided by Owner to
selected Licensor) and recommended treatment methods when expected to be different from that typically encountered in
conventional waste water treatment plant. Effluent summary shall be provided for each unit separately.
d) Flare Load Summary:
For gaseous effluents connected to flare, flare load summary document shall be prepared which will summarize the unit flare load
for all relevant cases such as cooling water failure, general power failure, fire case, blocked discharge, any operational failure
etc Flare load summary shall be provided for each unit separately.
13.0 PIPING & INSTRUMENTATION DIAGRAMS (P&lD):
P&lDs shall depict complete piping and instrumentation requirement of all the units, corresponding to the Process Flow Diagram and
including alt process lines, utility lines to individual process consumer’s start-up lines, instrumentation for control,
monitoring and interlocks. P&lDs must be including, as a minimum, the extent of details outlined below:
a) All process lines for operating modes of the unit including start-up, shutdown and emergency situations. Lines traversing between
P&lDs as well as lines at unit battery limits will bear flagged connecting arrow-boxes.
b) Line size, line number, piping class designation and insulation type for all process and utility lines defined above.
Line numbering philosophy shall be as per OWNER.
c) Specialty piping items like valves, spool pieces, spectacle blinds, process drains and vents, etc., will all be indicated.
OWNER shall furnish his own standard details for selected licensor to review and follow as agreed upon.
d) Requirements for sampling, special arrangement of lines such as relative elevation difference, relative pipe spacing, hot or cold
flushing, two-phase flow regimes, etc., will all be clearly identified wherever relevant.
13.1 Instruments:
a) All Instruments for all operating modes of the unit including start-up end shut-down permissive and emergency situations.
Signals traversing between P&lDs as well as at unit battery limits with bear flagged connecting arrow-boxes.
b) All instruments required from a process standpoint on utility lines to Individual process consumers. Definition of a process
service is as defined above for piping.
c) Instrument number instrument designation as per ISA, insulation I tracing requirement type for all instruments shown as defined above.
Instrument numbering philosophy shall be as per OWNER.
d) Air failure position of control valves. Type of control valve manifold either in the P&lD itself or as a legend referring to a
specific table of valve size vis-a-vis manifold valve sizes have to be followed.
e) Set pressure of pressure relief valves.
f) Clear identification of all hardware and software instruments both in field and in control room, philosophy of automated trips
and start-ups, alarms, etc.
g) OWNER's philosophy towards use of single tapping points for multiple instruments, permitted use of a transmitter signal
for both monitoring and interlocking, etc., will be provided to selected licensor for review and adoption in design.
13.2 EQUIPMENT:
P&lDs shall be numbered as per OWNER's system and show all equipment required in the unit, major as well as minor, normal as well as
spare:
a) Equipment number (as per OWNER's system), equipment name and the following respective equipment data.
A. For Vessels: diameter, length and height, mechanical design pressure and temperature (or temperature profile).
B. For heat exchangers & fired heaters: rated heat duty, mechanical design pressure and temperature.
C. For pumps & compressors: rated volumetric flowrate, differential pressure head, mechanical design pressure and temperature.
b) Functional outline sketch using DEC's symbology of depicting equipment but showing all connected process and process-related
utility piping and nozzles.
c) Vessel elevations suggested for vessels with connected pumps, this elevation will correspond to pump NPSHA specified.
d) Indication of vessel internals showing all nozzles and man internals such as trays, demisters, packed sections, collector tray;
gravity or spray distributors, etc,
e) Insulation / tracing requirement.