express boiler

engineering

Written by

The Information Architects of Encyclopaedia Britannica

Last updated

June 26, 2026

Quick Summary

A boiler is an apparatus designed to convert a liquid into vapor, typically for generating steam. In a conventional steam power plant, a boiler includes a furnace for burning fuel, surfaces to transfer heat to water, and a space for steam to form and collect.1

The express boiler is a type of boiler designed with small water tubes to quickly generate steam. A flash boiler, on the other hand, has strong tubes with minimal water space that are kept very hot. Water entering in small amounts is instantly turned into steam and superheated.12

Summary created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

2 Britannica Sources

Ask Britannica AI about this topic

Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.

boiler
The express boiler is designed with small water tubes for quick generation of steam. The flash boiler may not require a steam drum, because the tubes operate at such high temperatures that the feed water flashes into steam and superheats before leaving the tubes. The largest…
Read More
The express boiler is designed with small water tubes for quick generation of steam. The flash boiler may not require a steam drum, because the tubes operate at such high temperatures that the feed water flashes into steam and superheats before leaving the tubes. The largest…
Read More