CHAPTER 1:- INTRODUCTION
1.1 (A) Problem Summary
The service environment of fossil-fired boilers along with human errors during engineering, fabrication, construction, operation, and maintenance will always result in occasional boiler tube failures (BTF). The industry goal is for a forced outage rate less than 1.5% with zero chemistry related failures. The frequency of these failures depends on the corrective actions taken to prevent or reduce boiler tube damage. Repeat BTF usually result in frequent forced outages, and ultimately in costly extended outages for major tubing replacement. It is estimated that the cost of water/steam-side boiler tube corrosion is over $1.1 billion per year.
A boiler tube is considered to have a failure when, its pressure boundary is broken by a leak or rupture, or prone to be broken due to wall thinning before the next scheduled boiler inspection
Boiler…show more content… • On the basis of RLA proper decision can be made about the plant’s safety and availability.
1.5 Plan of the Work
1.5.1. Flow of work:
Generation of idea of how boiler tube failure in coal based power plant occurred was coming from the summer training of 15days at Wanakbori thermal power station (WTPS). The section allotted boiler maintenance department (BMD1) frequently faced the issue related to boiler tube failure. so we decided to analyze and work on boiler tube failure.
2. Data collection
Throughout the whole semester we visited ‘Wanakbori’ thermal power station’ (WTPS) every Monday and collect the data related to boiler tube failure from efficiency department of WTPS.
Past data are as follows:-
(A) Table 1.1 Year wise boiler tube