Senin, 05 September 2011

[Update] Deatailed explanation of "How to read a Piping and Instrument Diagram(P&ID)?"

This topic is already(Piping and instrumentation diagram) discussed in instrumentpedia. But now I feel that more explanation is required on this topic.That is why I decided to write a detail post about it.
For reading a piping and instrumentation diagram someone should be very much familiar with the symbols.We can classify the instruments in to three large families.
1.Locally mounted instruments.
2.Instrument present in the front end.
3.Instrument present in the back end(Not accessible by operator. This class of instrument is located in the controller.

classification_of_instruments_in_piping_and_instrument_diagram

Each instrument is also identified by means of letters that describes its function as well as progressive numbers to ensure proper identification.

The first letter stands for the variable being measured.

T-Temperature
L-Level
P-Pressure
F-Flow
K-Time
S-Speed

Instrument function is represented by the second letter

I-Indicator
T-Transmiiter
R-Recorder
C-Control
D-Differential
S-Switch
E-Element
A-Alarm

Alarm function is represented by the third letter.

H-High
L-Low

Shutdown function is represented by the third and fourth letter.

H-Shut down due to a high value
L-Shut down due to a low value
HH-Shut down due to a high high value
LL- Shut down due to a low low value.

Letters used in Piping and instrumentation diagram

piping_and_instrumentation_digram_identification_letter_meaning

Some examples of instrument representation in piping and instrument diagram

Locally mounted temperature Indicator
p&id_representation_of_field_mounted_temperature_indicator
Panel mounted temperature Indicator.
p&id_representation_of_field_mounted_temperature_indicator
Temperature indicator in the DCS/PLC/Controller.
p&id_representation_of_controller_mounted_instrument
Locally mounted temperature transmitter.
p&id_representation_of_temperature_transmitter_field_mounted

Thermo element representation(Thermocouple/RTD)
p&id_representation_of_temperature_element


Representation of pipes and signal in P&ID:

Process lines
Pneumatic line
Capillary line
Electric line


piping_signal_represenatation

Control valves are representation in P&ID

LCV - Level control valve
PCV – Pressure control valve
TCV- Temperature control valve
FCV- Flow control valve
PSV- Pressure safety valve
ROV- Remote operated valve
MOV- Manually operated valve
FIC/V- Anti surge valve

Related post:
How to read a piping and instrument diagram?
Difference between p&id and pfd?

Kamis, 01 September 2011

Blog for Instrumentation, Electrical and Automation Engineers/Professionals

Hi Engineers/Professionals While starting this blog my intention was to share the knowledge with the others.. But now I decided to change the strategy.. Now I am planning to help the fresh engineers by giving some tips about interviews and giving some frequently asked interview questions.. Hey guys, what is your opinion?. Let me know?

Now onwards there will be a separate section for instrumentation and electrical interview questions. I have lot of instrumentation study materials. I am ready to share all those things. I need opinion of you guys.

Share this page with your friends and colleagues. This blog is exclusively for Instrumentation, Electrical and Automation Engineers/Professionals. Cheers!!!

Rabu, 31 Agustus 2011

About the DCU reboot.

If you're a fan of comics, and you're probably not, then you would know that DC comics are completely re-booting their stories. Plots, histories, characters and everything else is being re-done just so they can get some extra scratch.
Recently they released their first comic in their new universe; the new Justice League comic.

So. Here's basically how the first comic went.

Batman: "I am Batman."
Green Lantern: "I automatically think I am superior to you."
Batman: "I dislike your methods. Let's go visit Superman because of the plot."
Green Lantern: "I still think you are a wimp. Oh look, it's Superman."
Batman: "I am Batman."

Other things happened in between.

Jumat, 26 Agustus 2011

Youtubes.

So.
I don't really go here much.
Keep in touch with my thigns that I do:
Youtube: http://www.youtube.com/heiru3
Twitter: http://twitter.com/#!/HJT
Tumblr: http://heiru.tumblr.com/

A recent look at what I do:
I'm on a Sandstorm kick.


Jumat, 05 Agustus 2011

He does a few things similar to spiders.

Well, there you go. The first trailer for the new Spider-Man movie has gone live. I'm not too impressed by it, even though I love Spider-Man. Though, personally, I hardly ever read the comics. Maybe... twice. I've played the games, watched the cartoons, and saw the first three movies with Toby McGuire. Also, the toys. So many toys when I was a kid.

Now, back to the preview. Hmm... well, there is more focus on his past. The whole Parker-parents thing doesn't seem very suitable for the origin story. Although, I guess it will be necessary for him to develop his web fluid. The fluid is based off a scientific design Parker is able to complete after he gets his spider-powers. Probably because spiders have a natural instinct for creating their own web. Though, the more you think about it, the less sense it makes.

Then Gwen Stacy. Hot. Approved.

Then comes the parkour thing. It looks a lot like the Mirror's Edge game. The special effects producer must have played it recently with his kids.

The Peter Parker character seems a bit too cliche'- nerdy, though maybe he is where the cliche' comes from.
Bla bla bla.
I need more beer. Peace.

Jumat, 22 Juli 2011

Captain America: The First Badass.

Well, the next Summer blockbuster is up.
God, how does that not look awesome?

Short version of the review: I recommend it. Long version of the review: Below.

If you saw Ironman 1&2 and Thor, I would recommend you see this. If you plan on seeing the Avengers film next year, you have no goddamn reason to skip this movie. Otherwise you are missing the point itself. In fact, a piece of the major plot revolves around the very-shiny-and-mysterious cuboid seen in the post-credits scene of Thor. 
Yeah, that thing. The Cosmic Cube. Have they flat-out said what this thing can do? I don't think the Captain America movie even knew what it was all about. 

Now, time to prod this movie with a mocking stick. Also, look out for some spoilers below. I won't be descrete about this. The movie starts with Steve Rogers doing his thing; trying to fight for his US of the America. Some character exposition happens, some more things, and then we are introduced to his best-friend-and-eventually-sidekickish friend Bucky. Sorry girls, he doesn't wear a domino mask in this movie and he isn't 14. More character exposition happens, bla bla bla, just sit back and enjoy.

Then comes the super soldier treatment. In every commercial I have seen for this movie up until it's opening, we see Rogers actually grow inside the giant metal taning bed, which was a really nice touch. It showed progression into the man he would become. Instead, we get blinding light and then he steps out all big-blonge-and-beautiful. Mm. 

Small thing that bothered me: they said that they were going to apply some serum to all of his major muscle groups. Then they only apply it to his biceps. Why didn't he walk out looking like a Tank from Left 4 Dead? A major hulk above the waist, and a tiny scarecrow of a man below. 

After all of this, other things happen. A nice chase scene with only one car involved, Nazi submarines and more. The good stuff. A little humor in there too; which I love. There was a nice little bit where Rogers was chasing down a car using his Adonis-body-from-five-minutes-ago, and he is so unfamiliar with his new form he accidentally turns too hard and crashes into a building. Brilliant. 

Bla bla bla. More stuff happens. Captain America gets three costumes in this movie, all of which are either ridiculously hilarious or down-right badass. Though, to be fair, the second is really a composite of the first and some stolen military gear. 

Then some shields happen, and the rest of the movie spends 40% of the screen time with that damn thing in the screen. 

Then he gets a badass motorcycle that does some tricky-awesome things straight out of Twisted Metal.

Damn, I need to wrap this up. Uh.

Hydra was awesome. Instead of just being a straight parallel to the Nazi army, they are the super devious research and development branch of the Nazi regime that eventually spirals out of control. Their weapons are devastating  and everything has a nice blue neon trim. Though their salute is downright humorous. 

Then Captain America and his rag-tag group of mercinary-soldiers of fortune crash the party and look damn good doing it. However, this is all in montage. I guess the videogames can pick up that slack, but damn, I would have loved to see them crush even more Nazi heads. 
Also more shield. 

Then more character development, some credits roll, and you see pure Marvel magik.
I misspelled that correctly, yes. 

Here is my theory for why everyone loves this: Steve Rogers represents the typical, under-physically-developed fan who wishes they were as big and strong as their favorite heroes. Instead of going to the gym and working up to that stature, Rogers gets it within a span of five minutes. Who wouldn't want that? What a slacker. 

Here is a link to my quick and thorough review of the movie on youtube.
Hm, I probably should have posted this first.
Like, comment and subscribe. It grows the brand. http://www.youtube.com/Heiru3
Also check out the twitterpage: http://twitter.com/#!/HJT





Oh, also. Best character in the movie: A young and suave Howard Stark.
What a majestic stache.