Friday, October 19, 2012
AEI Book
Dear All DITians
Please update your information in the below link for keep in touch togather.
if you face any issue please write to me or comment below.
(Please use preferably chrome for opening the link below)
Labels: AEI Book
Wednesday, October 17, 2012
Quick Facts About Control Valves
Pressure Drop for
Good Control
·
DP = 30
to 35% of total dynamic drop for equal percentage characteristic valves
·
DP = up
to 50% for linear characteristics
Labels: control valve, epc-school, instrumentation, valves
Instrumentation Earthing System
Instrument earthing system
shall consist of the following earth type:
-
Electrical earthing (also called dirty earthing or Protective Earthing (PE))
- Instrument
earthing (also called Reference Earth (RE))
-
Intrinsically safe earthing
Labels: cables, earthing, epc-school, Rahul Kapoor, safety
Fopebook
Monday, October 15, 2012
Safety Valve Handbook
TWO SOV SCHEME
TWO
SOV SCHEMATIC (See Scheme Below)
Two sov’s are used in order to have redundant air supply arrangement to
valve. Now consider following cases:
Labels: control, control system, EPC School, ESD, Rahul Kapoor, safety, SOLENOID, SOV
Saturday, October 13, 2012
HART Communication
HART - Highway Addressable Remote TransducerProtocol
is an early implementation of Fieldbus, a digital industrial automation protocol. Its most notable advantage is that it can communicate over legacy 4-20 mA analog instrumentation wiring, sharing the pair of wires used by the older system.
Read more »
is an early implementation of Fieldbus, a digital industrial automation protocol. Its most notable advantage is that it can communicate over legacy 4-20 mA analog instrumentation wiring, sharing the pair of wires used by the older system.
Important Points to Consider
- Regardless of the age or capability of your control, safety or asset management system, HART technology can provide additional information to help extend time between shutdowns, lower maintenance cost and improve process performance.
Labels: 4-20mA, communication, fieldbus, HART, protocol, Rahul Kapoor, signal
Friday, October 12, 2012
Integrated DCS and SIS or Isolated Systems
|| Found it worth Sharing ||
ISA- InTech Article
My Conclusion-
Which systems are better?
The original separate Safety
Instrumented Systems where the logic solver is totally different or the
integrated version, where the same system has two different kinds of
controllers/logic solvers-one type for the BPCS and another type for the SIS?
Note that the integrated SIS DCS does not imply that it is one
common system, it is just integrated for ease of use an convenience.
Thus the configuration software may
have different types of logic blocks, some meant exclusively for use in safety
functions, whereas other can be used in the normal BPCS functions. If the logic
solvers/ controllers need to communicate with other logic solvers, then it has
to be over a "safety bus".
Labels: control, control engineering, DCS, ESD, Rahul Kapoor
Thursday, October 11, 2012
Article - Wired vs. wireless in utility markets
|| I found it worth Sharing ||
My Conclusion-
In short, it is my personal opinion that wireless technology be used as a last resort. There is nothing more annoying than fighting with your wi-fi equipment because you suddenly lost your signal when you were trying to put in a last second bid on ebay, or check an important email before you walk out the door or lost communication due to bad weather etc.
Speed, Security and reliability will be never better with wireless signals that over the wire.
Source - ISA InTech
Addressing the ongoing debate of wired vs. wireless technologies for communication networks in the utility industry, while examining current market trends such as copper theft
Labels: article, cables, copper wire, HART, ISA, Rahul Kapoor, wireless
SELECTION OF FLOW METER AT LNG SERVICE
LNG Metering Skid
Natural gas (NG) has become an important part of the energy
mix, particularly in electric power generation, where it’s prized as an easily
handled, clean-burning liquid. Liquefied Natural Gas (LNG) is a more
cost-effective way to bring gas to market across oceans and continents.
Construction of many overland pipe-lines is underway, but gas companies are
also investing in LNG supply chains, building massive LNG tankers to convey gas
from port to port, and terminals to convert gas to its form for easy transport,
and back to gas for consumption. In this Paper, we’ll analyze the challenges of
Flow measurement at LNG service applications.
Labels: coriolis, flow control, flow measurement, flow meter, lng metering, ultrasonic flow meter
Wednesday, October 10, 2012
NEMA vs IP
NEMA defines standards for
various grades of electrical enclosures typically used in industrial
applications. Each is rated to protect against designated environmental
conditions. A typical NEMA enclosure might be rated to provide protection
against environmental hazards such aswater, dust, oil or coolant or
atmospheres containing corrosive agents such as acetylene or gasoline.
Labels: dustproof, international, IP vs NEMA, protection, Rahul Kapoor, standard, waterproof
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