Instrumentalia

INtools Tips & Trick: 2 Cases of Process Data

As you know, sometimes Process Engineer define several cases in the Material Balance.
For example Case 1 is used for Normal Condition and Case 2 is for Other Condition.

Intools has capability to record process data of this different cases very well.
It also can be calculated and create report separately for each cases.

How to do it?

Let's open the Process Data Module.
1. Open a required Tag. No.
2. Complete the process data as required.
3. After finish click Save.
4. Click Action>Enable Case...

Fig.3 Enable Case

Fig.4 Cases

Fig.5 Add Cases

posted by Freaky Valentine @ 8:45 AM Comments: 0

Cable Termination Numbering

Thanks to Iyus for giving me some references from the projects.
Even we took it as an examples from the projects, but we can use it as references in the future:

REKAYASA - MHI / TEC
Field Instrument (analog transmitter, SOV dll.) = Use plus (+) and minus (-)
Field Instrument ( limit switch, press switch dll) = Use COM, NC or NO
Junction Box = field instrument tag plus terminal number (e.g. 2-PT-001 / TB1-1)
Marshalling panel = Only terminal number (perhaps it would be better if we add tag, e.g. 2-PT-001 / DT1-1)

IKPT - CHIYODA (PPGS Project)
Field Instrument (analog transmitter, SOV dll.) = Use plus (+) and minus (-)
Field Instrument ( limit switch, press switch dll) = pake COM, NC or NO
Junction Box = field instrument tag number
Marshalling panel = field instrument tag number

I know it's to simple to raise this matter on the blog without comparing to International Standard. Iyus give me ANSI/ISA–S5.4–1991 standard of Instruments Loop Diagam for better references. I'll put the review of it on the blog later.

At least it is a good start...

have a nice day...

posted by Freaky Valentine @ 7:21 AM Comments: 0

Valve Leakage Classification

Leakage Classifications of Control Valves
Classification of seat leakage through control valves

Control valves are designed to throttle and not necessary to close 100%.
A control valve's ability to shut off has to do with many factors as the type of valves for instance. A double seated control valve have very poor shut off capability. The guiding, seat material, actuator thrust, pressure drop, and the type of fluid can all play a part in how well a particular control valve shuts off.

Seat Leakage Classifications

There are actually six different seat leakage classifications as defined by ANSI/FCI 70-2 1976(R1982) .
The most common used are
· CLASS IV
· CLASS Vl

CLASS IV is also known as metal to metal. It is the kind of leakage rate you can expect from a valve with a metal plug and metal seat.
CLASS Vl is known as a soft seat classification. Soft Seat Valves are those where either the plug or seat or both are made from some kind of composition material such as Teflon or similar.

Valve Leakage Classifications

Class I - Valve Leakage Classifications

Identical to Class II, III, and IV in construction and design intent, but no actual shop test is made. Cass I is also known as dust tight and can refer to metal or resilient seated valves.

Class II - Valve Leakage Classifications

Intended for double port or balanced singe port valves with a metal piston ring seal and metal to metal seats.
· 0.5% leakage of full open valve capacity.
· Service dP or 50 psid (3.4 bar differential), whichever is lower at 50 to 125 oF.
· Test medium air at 45 to 60 psig is the test fluid.
Typical constructions:
· Balanced, single port, single graphite piston ring, metal seat, low seat load
· Balanced, double port, metal seats, high seat load

Class III - Valve Leakage Classifications

Intended for the same types of valves as in Class II.
· 0.1% leakage of full open valve capacity.
· Service dP or 50 psid (3.4 bar differential), whichever is lower at 50 to 125 oF.
· Test medium air at 45 to 60 psig is the test fluid.
Typical constructions:
· Balanced, double port, soft seats, low seat load
· Balanced, single port, single graphite piston ring, lapped metal seats, medium seat load

Class IV - Valve Leakage Classifications

Intended for single port and balanced single port valves with extra tight piston seals and metal to-metal seats.
· 0.01% leakage of full open valve capacity.
· Service dP or 50 psid (3.4 bar differential), whichever is lower at 50 to 125 oF.
· Test medium air at 45 to 60 psig is the test fluid.
Typical constructions:
· Balanced, single port, Teflon piston ring, lapped metal seats, medium seat load
· Balanced, single port, multiple graphite piston rings, lapped metal seats
· Unbalanced, single port, lapped metal seats, medium seat load
· Class IV is also known as metal to metal

Class V - Valve Leakage Classifications

Intended for the same types of valves as Class IV.
· The test fluid is water at 100 psig or operating pressure.
· Leakage allowed is limited to 5 x 10 ml per minute per inch of orifice diameter per psi differential.
· Service dP at 50 to 125 oF.
Typical constructions:
· Unbalanced, single port, lapped metal seats, high seat load
· Balanced, single port, Teflon piston rings, soft seats, low seat load
· Unbalanced, single port, soft metal seats, high seat load

Class Vl - Valve Leakage Classifications

Class Vl is known as a soft seat classification.
Soft Seat Valves are those where the seat or shut-off disc or both are made from some kind of resilient material such as Teflon. Intended for resilient seating valves.
· The test fluid is air or nitrogen.
· Pressure is the lesser of 50 psig or operating pressure.
· The leakage limit depends on valve size and ranges from 0.15 to 6.75 ml per minute for valve sizes 1 through 8 inches.

posted by Tukang Kesetrum @ 7:38 AM Comments: 0

INtools Tips 'n Tricks:

Thanks to Hilman for giving me these tips...^^

Create Enhanced Smart Loop wiring connection of FT with remote FI using INtools

Consider we have this kind of connection:

Notes: I was trying this tips using other unit number in INtools existing training project, so the tag number a litle bit different from the pic above. I used 03-FT-1006 and 03-FI-1006. I hope it won't confuse you.

After connect the cable of FT-1006 and FI-1006 on the left side, you must connect each wire of cable FT-1006 JB to the right side one by one, as you see belows:

As you see, the 2nd of C-03-FT-1006 JB wire will appear as SPARE because not connected to proper negative terminal port. That's is the basic idea to use this tips. If you generate the enhanced loop diagram, the loop will not connected properly. How to solve this problem?

1. Double click the screw symbol at terminal number 5, then Terminal Connection windows will appear.
2. Click the drop down menu at signal on the right column
3. Choose 03-FT-1006
4. save and close.

And you will see that the signal is connected...and you can generate enhanced smart loop properly.

have a try...^^

Jumpers J2/3 and J4/5

Panel Strip Report

Enhanced Smart Loop result

posted by Freaky Valentine @ 8:19 AM Comments: 0

Flowmeters

Flow Meter itu menurut www.omega.com, bisa dibagi empat:

1. D/P Flowmeter : Flowmeter yg prinsip kerjanya menggunakan perbedaan tekanan antara sisi upstream dan downstream, yg kemudian di konversi menjadi indikasi flow. Yg termasuk ke dalam D/P flowmeter antara lain:
a. Primary/Head Flow Element, contohnya: Orifice plate, venture/flow tube, flow nozzle, segmental wedge dan venture cone.
b. Pitot Tubes, contohnya: Annubar
c. Variable Area Flowmeter, contohnya: Rotameter

2. Mechanical Flowmeter
a. Positive Displacement Flowmeter, contohnya: Liquid PD Meter, Piston Meter, Gear & Lobe Meter, Helix Meter, Gas PD Meter dsb.
b. Turbine Flowmeter
c. Other Rotary Flowmeter, contohnya: propeller meter, paddlewheel flowmeter

3. Electronic Flowmeter
a. Magnetic Flowmeter
b. Vortex Flowmeter
c. Ultrasonic Flowmeter

4. Mass Flowmeter
a. Coriolis Flowmeter
b. Thermal Mass Flowmeter
c. Hot-Wire Anemometer

posted by Freaky Valentine @ 10:18 AM Comments: 2

Safety Valve

Frankly speaking, until now, sometimes I confused with so many terminologies about safety valve, relief valve, safety relief valve, pressure safety valve or pressure relief valve. But after searching some valid references such as international standards and www.spiraxsarco.com I think I can divide those terms clearly. well, I hope this article will be useful for you.

1. Introduction

The primary function of safety valve is to protect LIFE and PROPERTY
How? by releasing a volume of fluid from within the plant when predetermined maximum pressure is reached.

Terminology

Presure Relief Valve is a spring loaded pressure relief device designed to open and relieve excess pressure and to re-close and prevent the further flow of fluid after normal conditions have been restored.

Safety Vavle is a pressure relief valve actuated by inlet static pressure and characterized by rapid opening or pop action. Normally used for compressible gases, steam or air services.

Relief Valve is a pressure reliev valve actuated by inlet static pressure and having a gradual lift generally proportional to the increase of overpressure. Primarily used with incompressible fluids.

Safety Relief Valve is a pressure relief valve that may be used for safety or relief valve depending on the application.

Ok, from above definitions, I hope you can clearly differ the terminology.


Discharge Capacity

Flow Area : The minimum cross sectional area between inlet and the seat, at its narrowest point.

Curtain Area : The area of cylindrical or conical discharge opening between the seating surfaces created by the lift of the disk above the seat.

Discharge Area: This is the lesser og the curtain area or flow area, which determines the flow thru the valve

Sorry, I can't continue the blog right now, I have to go...
to be continue...

posted by Freaky Valentine @ 8:26 AM Comments: 0

Reynolds Number

Re = (Velocity X Pipe Diameter X Density)/absolute Viscosity

Re < 2000 Laminar flow, 'coz viscous forces predominantly
2000 < Re < 4000 Transitional Flow
Re > 4000 Turbulent Flow, 'coz inertial forces predominantly

posted by Freaky Valentine @ 8:15 AM Comments: 0

INtools Overview

Intools merupakan sebuah software Integrated Instrumentation Engineering dan Design Maintenance System dengan basis windows dan menggunakan system database Oracle. Terdiri dari modul2 yg menunjukkan berbagai tahapan dari pekerjaan Instrument.

# Modul Administration, digunakan oleh administrator system dan administrator domain untuk set up project conventions dan mengatur akses engineer dan designer kedalam INtools. Kalau diperlukan tambahan fields untuk menginput data yg tidak di-cover oleh INtools, UDF (User Defined Field) bisa di utilisasi.

# Import Utility, memungkinkan import data dari file eksternal ke dalam INtools. Umumnya file dalam format Access dan Excel.

# Modul Instrument Index, tempat untuk ngentry semua tag dan loop juga data2 yg terkait dengan keduanya.

# Modul Browser, memungkinkan user untuk membuat berbagai view data-data dari semua modul engineering dimana datanya pun bisa di edit. UDF untuk modul diluar modul Index didefinisikan dalam modul Browser ini.

# Modul Process Data, digunakan untuk ngentry data proses, setting trip dan alarm, dll. data proses dapat di input sesuai dengan sebuah line atau tag number.

# Modul Calculation, terdapat kalkulasi untuk control valves, relief valves, flow devices dan thermowells. Data yg digunakan adalah data dari modul Process Data dan module Instrument Index. International Standards yg digunakan : ISA, ANSI, API, ISO dan IEC.

# Modul Specifications, digunakan untuk membuat data sheet instrument dalam format single atau multiple untuk semua tag. Intools memiliki satu set data sheet instrument standar dalam format ISA yg dapat di customize sesuai dengan kebutuhan project tertentu. Data Sheet disimpan didalam INtools sebagai forms.

# Modul Spec Binder, digunakan untuk mengalokasikan sekelompok data sheet untuk requisitions. Specifications dan notes dalam berbagai format, misal : Word, bisa ditambahkan ke <

posted by Freaky Valentine @ 9:34 AM Comments: 0