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A flanged pipe joint looks simple: two raised faces, a gasket between them, a ring of bolts pulling them together. Yet the gasketed bolted flange is one of the most common sources of leaks in process plants, and the reason is almost always the same — the bolts were not tightened to the right load. Too little and the joint weeps; too much and the gasket is crushed. The number that sits between those failures is the bolt preload, and it is not the same as the pressure load. This article explains how a bolted flange actually carries internal pressure, why the bolts must be preloaded well above the pressure end force, works a concrete example, and lists the mistakes that turn a sound joint into a leaking one. Why this calculation matters Bolted flange joints appear wherever a pipe or vessel has to be opened for maintenance: pump connections, valve bodies, heat exchanger shells, instrument tappings, and reactor manways. Unlike a welded joint, a flange is meant to be taken apart and reassembled, and every reassembly depends on the fitter applying the correct bolt load. The stakes are real. A leaking flange on a hazardous service can release flammable or toxic fluid. Even a benign leak wastes product and forces an unplanned shutdown. Design codes such as ASME Section VIII Appendix 2 set out a full method for sizing flange bolts, and at its heart is a comparison: the load the bolts can supply versus the load the joint demands in two distinct conditions — seating the gasket, and holding pressure. Understand the pressure end force and you understand the floor that the bolt load must clear. The core method When the line is pressurised, internal pressure acts on the fluid inside the flange and pushes the two flanges apart. The total separating force is the hydrostatic end force , the pressure acting over the area enclosed by the gasket sealing circle: H = p * (pi / 4) * G^2 Here p is the internal pressure and G is the gasket reaction (sealing) diameter — the effective circle on

Claude Code — My daily dev tool Claude Code by Anthropic is the one I use the most for development, by far. What sets it apart from the others: it integrates directly into the terminal and editor, it can read and modify files, navigate an entire codebase, and understand the global context of the project. Not just responding to a copy-pasted snippet in a chat window. In practice, when I have an idea, I ask it to structure the project and challenge my choices. And to be clear: I challenge it too. 😄 I sometimes disagree with its suggestions, and that's often where the conversation becomes interesting. It's a tool, not an oracle. Perplexity — My reference for research Perplexity is my main tool when I need a reliable and verifiable answer. It's a response engine that systematically cites its sources — you ask a question, it answers with excerpts from real web pages and direct links. No more hallucinations without references. However, I use it almost exclusively on desktop. On smartphone, it's flooded with messages pushing the paid version. Understandable from their side, but frankly annoying when you just want to do a quick search. 🙄 Gemini — For those in the Google ecosystem Gemini is Google's AI, and its main advantage is integration with Gmail, Docs, Drive, Sheets, and Google Search. I have a Google Pixel, and on that side, it does integrate very well with its own ecosystem. It's practical for analyzing documents or getting a quick summary without leaving the interface. That said, in terms of responses, it sometimes falters. 😬 Not systematically, but regularly enough that I stay on guard. And if privacy is a priority for you, it's worth thinking twice before entrusting it with your documents — I talk about this in my article on securing yourself on the Internet . ChatGPT — The natural entry point ChatGPT by OpenAI is the most known and most versatile AI. Writing, code, analysis, translation, summary, creativity... it does a bit of everything, often very well. The fre

This is a submission for the Hermes Agent Challenge , under the Write About Hermes Agent prompt. I've spent the last week testing AI memory failure modes in a public evaluation harness. That work changed how I read agent memory systems. This is a writing submission, not a build submission. I did not build a Hermes Agent project for this challenge. I am writing from the perspective of someone testing how memory failures show up once agents can act. So when I look at Hermes Agent, the question I care about is not only: Can the agent remember useful things? The harder question is: When memory conflicts, which memory is allowed to govern the agent's action? That distinction matters. Hermes Agent is interesting because it is not just a chat interface. Its documentation describes an open-source agentic system with tool use, project context, persistent memory, skills, browser automation, checkpoints, delegation, scheduled tasks, and multiple memory providers. That is exactly the kind of system where memory stops being a convenience feature and starts becoming part of the agent's operating boundary. If an agent can run tools, edit files, browse, delegate work, schedule tasks, and remember across sessions, then memory is no longer just "context." Memory becomes governance. The Memory Problem I Would Watch For In a simple chatbot, bad memory is annoying. In an agent, bad memory can become operational. The failure mode is not only that the agent forgets something. Sometimes the more dangerous failure is that it remembers the wrong thing too confidently. A memory can be: relevant but stale, relevant but low-authority, relevant but superseded, relevant but only context, relevant but not allowed to determine the action. That is the distinction my own tests kept running into. Retrieval systems are usually good at answering: What memory is closest to the user's request? But safety often depends on a different question: What memory is allowed to decide what the agent should do? Thos

This is a submission for the Hermes Agent Challenge : Write About Hermes Agent Hello, DEV friends! 👋 If you have been exploring the world of Artificial Intelligence lately, you have probably heard a lot of buzz about "AI Agents." But what does it actually feel like to build with one? Today, I want to share my personal experience working with Hermes Agent . I used it to build a smart assistant called the Alpha-Dairy Quant Pipeline —a system that helps track and make sense of food market data. ( https://github.com/HopeBestWorld/alpha-dairy-pipeline ) Whether you are an expert coder or just curious about AI, I hope this friendly guide inspires you to try building an agent of your own! What is Hermes Agent, Anyway? Think of a standard AI as a helpful chatbot that answers questions when you ask them. An AI Agent , on the other hand, is more like a proactive assistant. You give it a big goal, and it sits down, makes a step-by-step plan, uses digital tools, runs code, and checks its own work until the job is done. For my project, I wanted to track market prices for three major dairy products: Cheddar Blocks, Butter, and Dry Whey. Instead of doing all the math and graphing by myself, I let Hermes Agent take the wheel. The Magic of Multi-Step Reasoning The coolest part of working with Hermes Agent is watching it "think". When I asked my agent to look at our data database ( market_intelligence_3.db ) and find the best trading strategy,it followed a beautiful planning loop: Checking the Files: It looked at our setup files ( tickers.yaml and requirements.txt ) to make sure all its tools were ready. Running the Math: It triggered a Python program ( backtest_engine.py ) to study weekly market history. Making Decisions: It realized that Dry Whey was way too wild and risky to trade right now, so it intelligently gave it a 0% safety rating and put the focus on Cheddar and Butter instead. Drawing and Sharing: It automatically drew a beautiful performance chart ( backtest_analysis.png