- \n
- scale formation:<\/strong>\u00a0calcium and magnesium ions deposit on heat exchange surfaces, reducing heat transfer and increasing energy consumption<\/li>\n
- corrosion:<\/strong>\u00a0dissolved oxygen and carbon dioxide initiate corrosive processes that weaken pipes and boiler shells<\/li>\n
- foaming:<\/strong>\u00a0dissolved solids and oil-based contaminants can lead to foam, which causes boiler water carryover into the steam system<\/li>\n
- boiler damage:<\/strong>\u00a0deposits and corrosion-related issues may result in cracks, leaks, or even boiler explosions<\/li>\n<\/ul>\n
![\"\"](\"https:\/\/www.euro-clear.eu\/wp-content\/uploads\/2025\/09\/rusty-metail-reinforcements-2024-10-18-05-15-09-utc-1024x681.jpg\")
<\/p>\nMain steps of water treatment for industrial boilers<\/strong><\/h3>\n
- \n
- Mechanical pre-filtration<\/strong>
\nremoval of suspended solids using mesh or automatic filters<\/li>\n- Softening \u2013 Bluesoft water softeners<\/strong>
\nremoval of calcium and magnesium ions via ion exchange (replaced by sodium) or chemical treatment to prevent scale<\/li>\n- Reverse osmosis (RO) \u2013 leading brands: ARCTON and BLUECLEAR RO systems<\/strong>
\nremoves dissolved salts, organics, and bacteria to produce high-quality boiler feedwater<\/li>\n- Deaeration<\/strong>
\nremoval of dissolved oxygen either mechanically (e.g. thermal deaerators) or chemically (oxygen scavengers) to prevent corrosion<\/li>\n- Chemical conditioning<\/strong>
\napplication of corrosion inhibitors, pH regulators, and phosphate-based stabilizers to maintain system stability<\/li>\n<\/ol>\n![\"\"](\"https:\/\/www.euro-clear.eu\/wp-content\/uploads\/2025\/09\/pure_Water-1024x1024.jpg\")
<\/h3>\nMonitoring water quality: the importance of the LSI index<\/strong><\/h3>\n
In industrial boiler systems, the scaling or corrosive tendency of water can be predicted using a key indicator: the Langelier Saturation Index (LSI).<\/p>\n
What is LSI?<\/strong>
\nThe LSI is a calculated value that indicates whether water tends to:<\/p>\n- \n
- deposit calcium carbonate (as scale), or<\/li>\n
- aggressively dissolve metals (causing corrosion)<\/li>\n<\/ul>\n
Formula:<\/strong>
\nLSI = pH \u2013 pHs, where pHs is the pH at which water is saturated with calcium carbonate.<\/p>\n\n\n
\n LSI value<\/strong><\/td>\n water behavior<\/strong><\/td>\n consequence<\/strong><\/td>\n<\/tr>\n<\/thead>\n\n \n > +0.5<\/td>\n strongly scaling<\/td>\n risk of scale \u2013 heat loss, clogging<\/td>\n<\/tr>\n \n +0.2 to +0.5<\/td>\n slightly scaling<\/td>\n acceptable, but requires monitoring<\/td>\n<\/tr>\n \n -0.2 to +0.2<\/td>\n balanced, neutral<\/td>\n ideal boiler water<\/td>\n<\/tr>\n \n -0.2 to -0.5<\/td>\n slightly corrosive<\/td>\n minor risk of metal damage<\/td>\n<\/tr>\n \n < -0.5<\/td>\n strongly corrosive<\/td>\n high risk of pipe failure, boiler corrosion<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n ![\"\"](\"https:\/\/www.euro-clear.eu\/wp-content\/uploads\/2025\/09\/inside-a-biology-laboratory-front-view-2025-02-10-12-14-28-utc-1024x684.jpg\")
<\/p>\nWhat affects the LSI?<\/strong><\/h4>\n
- \n
- water pH<\/li>\n
- calcium ion concentration<\/li>\n
- alkalinity (carbonates)<\/li>\n
- temperature<\/li>\n
- total dissolved solids (TDS)<\/li>\n<\/ul>\n
Important:<\/strong>\u00a0LSI is not a standalone metric, but a guide that helps fine-tune water treatment when combined with regular lab testing and monitoring.<\/p>\n
What are the benefits of proper boiler feedwater pretreatment?<\/strong><\/h3>\n
\u2714\ufe0f reduced scale and corrosion formation
\n\u2714\ufe0f less downtime and lower maintenance needs
\n\u2714\ufe0f higher efficiency and lower operating costs
\n\u2714\ufe0f extended lifespan of boilers and piping
\n\u2714\ufe0f compliance with industrial and environmental regulations<\/p>\nSummary<\/strong><\/h3>\n
Industrial boiler water treatment is not just a technical task \u2013 it is the foundation of cost-effective operation. By regularly monitoring the LSI index and using modern filtration, desalination, and chemical conditioning technologies, serious damage can be prevented and long-term, safe equipment performance ensured.<\/p>\n
Operating a boiler at your facility? entrust the water treatment to professionals \u2013 this is where efficiency begins.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"
The long-term, economical, and safe operation of industrial boilers is impossible without proper water treatment. Minerals, dissolved gases, and contaminants present in raw water can cause serious problems in the boiler system, including scale formation, corrosion, foaming, and reduced efficiency. That\u2019s why boiler feedwater treatment is not just recommended, but technically and economically mandatory. What […]<\/p>\n","protected":false},"author":1,"featured_media":17287,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[11],"tags":[],"class_list":["post-17318","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.euro-clear.eu\/en\/wp-json\/wp\/v2\/posts\/17318","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.euro-clear.eu\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.euro-clear.eu\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.euro-clear.eu\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.euro-clear.eu\/en\/wp-json\/wp\/v2\/comments?post=17318"}],"version-history":[{"count":3,"href":"https:\/\/www.euro-clear.eu\/en\/wp-json\/wp\/v2\/posts\/17318\/revisions"}],"predecessor-version":[{"id":17321,"href":"https:\/\/www.euro-clear.eu\/en\/wp-json\/wp\/v2\/posts\/17318\/revisions\/17321"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.euro-clear.eu\/en\/wp-json\/wp\/v2\/media\/17287"}],"wp:attachment":[{"href":"https:\/\/www.euro-clear.eu\/en\/wp-json\/wp\/v2\/media?parent=17318"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.euro-clear.eu\/en\/wp-json\/wp\/v2\/categories?post=17318"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.euro-clear.eu\/en\/wp-json\/wp\/v2\/tags?post=17318"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
- Softening \u2013 Bluesoft water softeners<\/strong>
- corrosion:<\/strong>\u00a0dissolved oxygen and carbon dioxide initiate corrosive processes that weaken pipes and boiler shells<\/li>\n