TIG Root Pass Techniques: Keyhole, Lay-Wire, and Dab Methods Explained
A TIG root pass depends on penetration, fusion, heat, and filler control. This guide compares three common approaches for open-root pipe welding.
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220 articles
Walking the Cup vs Freehand TIG: Which Technique Is Better for Pipe?
Cup walking uses the ceramic cup for support; freehand relies on hand control. Both can produce sound pipe welds when applied well.
Read article →Flange Size, Class, Bolt Size & Bolt-Hole Reference Chart
Compare key Class 150 and 300 flange dimensions and bolt patterns. Verify final dimensions against the applicable standard and project specification.
Read article →Saddle Pipe Layout: Circumference and Degrees
Use actual pipe outside diameter to divide the branch circumference and calculate the saddle curve for a branch fitting to a header.
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How to Calculate Flange Bolt-Hole Rotation and Clocking
Flange clocking sets the rotational position of a bolt pattern. Use hole count and a clear reference to calculate spacing and straddle angle.
Read article →How to Lay Out Pipe Penetrations Through Walls and Floors: A Detailed Guide
Accurate penetration layout starts with trustworthy references. Check centerline, elevation, sleeve size, and nearby conflicts before cutting.
Read article →How to Calculate a 45° Pipe Run: 1.414 Magic Number Explained
For a true 45° offset, travel equals set × 1.414 and run equals set. Subtract fitting takeoffs to determine the straight pipe cut length.
Read article →How to Make a Homemade Flange Wrench: The Simple Two-Pin Tool for Threaded Flanges
A homemade flange wrench uses two pins and a handle to rotate threaded flanges. Use only approved materials, fabrication methods, and applications.
Read article →Why Pipe Spools Never Fit: 15 Things That Go Wrong Between the Fab Shop and the Field
A spool can match its drawing and still miss in the field when small deviations accumulate across equipment, steel, supports, and connected piping.
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What Happens Inside a Heat Exchanger?
A shell-and-tube exchanger transfers heat between separate process streams. Understanding each flow path helps explain maintenance and piping arrangements.
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Z87 vs. Z87+: What’s the Difference and Why Does It Matter?
Z87 and Z87+ are not interchangeable markings. This guide explains high-impact qualification, eyewear limitations, side protection, and selecting protection for industrial hazards.
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What Does Z87 Mean on Safety Glasses? What Every Industrial Worker Should Know
The Z87 marking connects safety eyewear to the ANSI/ISEA Z87.1 standard. Learn how markings, impact ratings, side protection, lens features, and job hazards affect proper selection.
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