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Subject: isolation and spading of equipment Здравствуйте,
помогите, пожалуйста с фразой "isolation and spading of equipment".
Контекст - технические условия на проектирование электростанции. Раздел "Final Documentation".3.3.3 Piping & Instrument Diagrams (P&ID)
P&IDs must be prepared for all process and utility systems in accordance with
ISO 10628 and ISO 3511/1 & 2. They shall contain the following details prior
to detailed design (and the information underlined must be included already
with P&IDs included as contract basis):
Basic Information
a) Type of all equipment
b) Equipment tag numbers
c) Equipment data
d) All piping characteristics
e) Pipe fittings etc.
f) All measurement and control functions
g) Instrument tag numbers
h) Drive data
Additional Information
(........................)
In some more details, the following information must be shown:
All and any process and utility equipment (functions) shall be shown and
tagged.
• Drip trays.
• All instrumentation locations with tag numbers reflecting the control functions
such as control loops, logic functions, pre-alarms, trips, signal types,
shut down levels, tag numbers, local instruments, connections to local control,
central control room, emergency shutdown system, process shutdown
system, pressure safety valve and blow-down valve systems and the system
control and data acquisition system when provided.
• All valves such as isolation valves, control valves, check valves, relief
valves, shut-down valves, blow-down valves, block valves, bleed valves.
Size and type shall be indicated and completed with tag numbers.
• Mechanical locks and interlocks.
• All process and utility lines including equipment connections, and interconnecting
pipework with direction of flow.
• Inline equipment and piping items such as straightening vanes, spool
pieces expanders, maintenance spools, reducers and temporary strainers.
• Clean-out and sample connections.
• Piping class breaks.
• Labels on entering and leaving lines giving medium and source/destination
• All lines shall be sized and numbered. Material and insulation specification
shall be included.
• All line number and/or specification changes shall be identified.
• All manual valves with size and specification added, correctly shown as
normally open/closed.
• Fail/open/fail closed position of actuated valves.
• Information on lines such as line slope requirements, symmetrical piping
requirements etc.
• Packages shall be identified with limit of responsibility between contractor
and others.
• Connections to other systems
• Connections to other equipment and packages e.g. steam out, vent, manholes,
drains etc.
• ISOLATION AND SPADING OF EQUIPMENT.
• All flanges and drains in lines.
• Heat tracing.
• Area changes shall be shown on lines.
• Utility stations.
• Piping special items.
• Significant equipment internals, such as vortex breakers, mist extractors
etc. Спасибо.
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