Inst ToolsInst ToolsInst Tools
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
  • Request
Search
  • Books
  • Software
  • Projects
  • Process
  • Tools
  • Basics
  • Formula
  • Power Plant
  • Root Cause Analysis
  • Electrical Basics
  • Animation
  • Standards
  • 4-20 mA Course
  • Siemens PLC Course
Reading: Stuck Segment Orifice Dimensions Calculations
Share
Font ResizerAa
Inst ToolsInst Tools
Font ResizerAa
  • Courses
  • Design
  • PLC
  • Interview
  • Control System
Search
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
  • Request
Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Inst Tools > Blog > Root Cause Analysis (RCA) > Stuck Segment Orifice Dimensions Calculations

Stuck Segment Orifice Dimensions Calculations

Instrumentation engineering root cause analysis of stuck segment orifice dimensions calculations.

Last updated: September 28, 2022 2:51 pm
S Raghava Chari
Root Cause Analysis (RCA)
No Comments
Share
3 Min Read
SHARE

Instrumentation engineering root cause analysis of stuck segment orifice dimensions calculations.

Contents
Segment Orifice Dimensions CalculationsBenefits
Article Type:Root Cause Analysis (RCA)
Category:Instrumentation
Equipment Type:Instruments
Author:S. Raghava Chari

Note: This root cause analysis (RCA) is from real-time scenarios that happened in industries during the tenure of two or three decades ago. These articles will help you to improve your troubleshooting skills and knowledge.

Segment Orifice Dimensions Calculations

Stuck Segment Orifice dimensions calculations might need Rs 20 million pump import.

Problem: Refer to Instrument problem discussed segment orifice plate (SOP).

Segment Orifice Sizing
S.No.Col ACol B
1.    Given m =0.57 the max orifice to pipe bore area for min pressure loss0.57
2.    Pipe bore area APB =PI()*500^2785398
3.    Orifice Plate Opening area AO = 0.57*APB 447677
4.    Arc ADB subtended Angle O (see fig) – θ
5.    Interior Angle AOB(360- θ)
6.    ▲AOB area =0.5*500^2*Sin(360- θ) 
7.    Sector ADB area As = APB*θ/360 
8.    Flow opening area AFO =447677=(θAPB/360+0.5*R2Sin(360-θ)/2))  
9.    Put θ in an excel sheet cell and  =(θAPB/360+0.5*R2Sin(360-θ)/2)) in another 
10.             Key in different θ values to get closest to AFO of 447677 calculated in cell B3 
11.             Chord distance d=500*COS(RADIANS((360-B4)/2))55.1
12.             In few key ins θ = 192.651O yields AFO=447676 – a surprisingly close value. And Chord distance =55.1 as above  
13Mark the Chord 55.1 mm away from plate CL towards the tag, the arc ADB and cut Segment opening. Orifice is ready 

Calculating the chord distance from the plate CL was necessary to make the segment orifice plate.

The table shows where the engineer was stuck and how the author unstuck him.

Innovative Segment Orifice

Thanks to unsticking enabled chord distance, he calculated, the workshop cut the orifice plate opening and delivered the orifice plate for use.

Benefits

The plant realized the previous problem explained the innovation of just welding a plate in the pipe cut slot with the sharp edge 55 mm away from the pipe horizontal diameter line. 

The plant realized all the Instrument Previous Problem discussed benefits

Author: S. Raghava Chari

Do you face any similar issues? Share with us through the below comments section.

If you liked this article, then please subscribe to our YouTube Channel for Instrumentation, Electrical, PLC, and SCADA video tutorials.

You can also follow us on Facebook and Twitter to receive daily updates.

Read Next:

  • Pressure Switch Screwed Cover
  • Too Low-Temperature Readings
  • Pressure Switch Screwed Cover
  • Thermowell Shank to Flange Leaks
  • Magnetic Flow Meter Liner Damaged
Don't Miss Our Updates
Be the first to get exclusive content straight to your email.
We promise not to spam you. You can unsubscribe at any time.
Invalid email address
You've successfully subscribed !

Continue Reading

Transformers Coolers Weld Joints Oil Oozes Were Eye Sores
Totally Enclosed Fan Cooled (TEFC) Motors Rampant Winding Burnouts
Heat Exchanger Root Cause Analysis (RCA)
Pulverizer Electrical Problem Solved
Root Cause Analysis – Burst Transformers and 11 kV Input Breakers
A Plant Bucket Elevators chains too short chain lives problem eliminated
Share This Article
Facebook Whatsapp Whatsapp LinkedIn Copy Link
Share
Leave a Comment

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Stay Connected

128.3kFollowersLike
69.1kFollowersFollow
210kSubscribersSubscribe
38kFollowersFollow

Categories

Explore More

Fired Boiler Induced Draft Fan (IDF) Failures Upset all Plants Operations
Thermocouple Wires and Extension Lead Issues
Many Bucket Elevator Wrecks rob crew morale
RCA – Compressor Did Not Trip on Suction Pressure Low Low
A Large Gate Valve’s Failed Motorized Operation
Lessons Learned from Actuator Passing Incidents
Solving Control Valve Hunting: Instrument Troubleshooting
Ammonia Feed Ball Valve to Ship Tank Closed

Keep Learning

CO2 Absorber Graphics in DCS

CO2 Absorber Corroded Wall Thickness & Weld Building

Steam Turbine Driven Centrifugal Compressors Leak due to Broken Instrument

Discharge Head 3‑monthly leaks of Steam Turbine Driven Centrifugal Compressors

Leaking Plug Valves pose Safety Hazards and Lead to Plant Shutdown

Leaking Plug Valves Pose Safety Hazards and Lead to Plant Shutdown

Target Flow Transmitter Problem

Target Flow Transmitters Failed the Very Midnight

Root Cause Analysis for Valve Problem

Root Cause Analysis for Tank Overflow due to Valve Problem

Compressor Cracked Shaft Spacers

Compressor Cracked Shaft Spacers

Rotary Drier Shell to Split Gear drive

Rotary Drier Shell to Split Gear drive eliminates too frequent drive failures

Questions and Answers on Motors and Generators

HT Motor Problem appears after Disassembly and Reassembly

Learn More

Voltmeter Calibration

Calibration Procedure of Voltmeter and Ammeter

Level Gauge Theory

Types of Level Gauges

Relay Principle

Relay Principle & its Types

Differential signals with RS485

RS485 Serial Communication

Difference Between PNP and NPN Sensors

Difference Between PNP and NPN Sensors

Offline UPS

UPS Working Principle and Types – Offline and Online UPS Systems

Instrumentation Role during Steam Blowing

Instrumentation Role during Steam Blowing

p-type-semiconductor

N Type and P Type Semiconductors

Menu

  • About
  • Privacy Policy
  • Copyright

Quick Links

  • Learn PLC
  • Helping Hand
  • Part Time Job

YouTube Subscribe

Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Welcome Back!

Sign in to your account

Username or Email Address
Password

Lost your password?