https://mechcalc.net/blog/en/tags/lbb/ Recent content in LBB on MechCalc how-to Guide https://mechcalc.net/blog/og-default.png https://mechcalc.net/blog/og-default.png Hugo en Mon, 23 Feb 2026 00:00:00 +0000 https://mechcalc.net/blog/en/posts/asme-xi-app-y-crack-growth/ Mon, 23 Feb 2026 00:00:00 +0000 https://mechcalc.net/blog/en/posts/asme-xi-app-y-crack-growth/ A walkthrough of the latest ASME BPVC Section XI Appendix Y models for fatigue crack growth and stress-corrosion cracking in austenitic, ferritic and nickel-base alloys, with a code-based online calculation guide. https://mechcalc.net/blog/en/posts/08-fatigue-crack-growth/ Sat, 21 Feb 2026 12:00:00 +0100 https://mechcalc.net/blog/en/posts/08-fatigue-crack-growth/ <blockquote> <p>🧮 <strong>Go straight to the calculator</strong>: to skip the derivation and use the online tool with a built-in verification flow, open the <a href="https://mechcalc.net/blog/calculators">fatigue crack growth calculator</a> from the large category cards on the calculators home page.</p> </blockquote> <h2 id="1-where-fatigue-crack-growth-sits-in-an-lbb-analysis">1. Where fatigue crack growth sits in an LBB analysis</h2> <p>At the core of a Leak-Before-Break (LBB) argument: you must show that, over the service life, the time for an initial non-penetrating surface flaw to grow by <strong>subcritical crack growth</strong> through the wall and cause a leak — and the time from leak to growth to the critical fracture size — is long enough for the monitoring system to detect it and act.</p> https://mechcalc.net/blog/en/posts/kta3206-lbb-analysis-guide/ Thu, 19 Feb 2026 09:00:00 +0100 https://mechcalc.net/blog/en/posts/kta3206-lbb-analysis-guide/ <p>This article explains how to use the <strong>seven-step method</strong> of the <strong>KTA 3206</strong> standard for a <strong>Leak-Before-Break (LBB)</strong> analysis of nuclear piping. It pairs with the <strong>KTA 3206 LBB Pipe Analysis</strong> module of the online calculator, taking you from theory to practice.</p> <blockquote> <p>🧮 <strong>Try the calculator now</strong>: open the <a href="https://mechcalc.net/blog/calculators">KTA 3206 LBB pipe analysis calculator</a> , choose &ldquo;Fracture Mechanics → KTA 3206 LBB Pipe Analysis&rdquo;, and enter the parameters to get results with a detailed formula derivation and visual charts.</p>