{"id":9171,"date":"2026-01-03T16:59:10","date_gmt":"2026-01-03T13:29:10","guid":{"rendered":"https:\/\/klevers-aryana.com\/?p=9171"},"modified":"2026-02-04T15:19:06","modified_gmt":"2026-02-04T11:49:06","slug":"flange-leakage","status":"publish","type":"post","link":"https:\/\/klevers-aryana.com\/en\/articles-en\/flange-leakage\/","title":{"rendered":"Why does flange leakage persist even after gasket replacement? (Technical Review + Ultimate Solution)"},"content":{"rendered":"\n

Have you ever faced this engineering nightmare? You shut down the pipeline, replace the old gasket with a new and expensive one, tighten the bolts with a torque wrench, but as soon as the system pressure increases, the fluid starts dripping between the flanges again. This scenario (flange leakage) is one of the most common and yet most costly challenges in the petrochemical, oil, gas, and power plant industries. But why? Isn’t the gasket new?<\/p>\n\n\n\n

The truth is that the gasket is only part of the sealing equation.<\/strong> In many cases, replacing a gasket without paying attention to the condition of the “flange face” and the thermodynamic conditions of the system is like putting a band-aid on an infected wound; it covers the appearance but does not solve the problem.<\/p>\n\n\n\n

\"Chlorz
Chlorz Adhesive 101<\/figcaption><\/figure>\n\n\n\n

In this specialized article from Klevers Aryana<\/strong>, we examine 5 hidden reasons for flange leakage that are often overlooked and introduce a modern solution for damaged surfaces.<\/p>\n\n\n\n

1. Flange Face Damage<\/h2>\n\n\n\n

The most important reason why gasket replacement doesn’t work and causes flange leakage is the existence of defects on the surface where the gasket sits. The ASME PCC-1<\/a><\/strong> standard clearly states that the flange face must have a specific roughness so that the gasket can flow into its microscopic grooves and complete the sealing.<\/p>\n\n\n\n

However, over time, factors cause the degradation of this surface:<\/p>\n\n\n\n