6 min read
Pipeline Safety in Seismic Zones and Gimbal Expansion Joints
What breaks a pipeline in an earthquake is not pressure but different parts of the structure moving in different directions. The c...
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Technical Articles
Engineering articles on industrial valve and expansion joint selection, applications, installation and maintenance.
Articles
6 min read
Spring-Loaded Lift Check Valves: Why Orientation Is Free
A spring check valve can be fitted horizontally or vertically; a swing type cannot. The difference lies in whether the closing for...
5 min read
Straight or Angle Pattern? How Body Geometry Shapes the Piping
When the same valve comes in two body forms, it is not a cosmetic choice. The angle pattern removes an elbow and a weld where the...
6 min read
Pressure Rating and Bolt Circle in PN Series Flanges
As the PN step rises, flange thickness, bolt count and bolt circle all change. Two flanges of the same size bolting together does...
6 min read
Sounding Plugs and Sounding Valves: The Safety Side of Tape Measurement
Measuring tank level with a tape is a simple job; the fitting that closes the sounding pipe is part of the tank’s safety boundary....
6 min read
End Connections on Axial Expansion Joints: Fixed Flange, Loose Flange, Weld Neck
Even with an identical bellows, the end connection changes installation time, future removability and the number of leak points on...
6 min read
Check Valve Types: A Map of Closing Mechanism and Face-to-Face Length
Swing, spring-loaded, dual-plate, disc and wafer check valves do the same job with different geometry. How the closing element mov...
5 min read
Bellows-Sealed Globe Valves: Lines Where Stem Leakage Is Not Acceptable
In an ordinary globe valve, sealing depends on the packing around the stem. The bellows type removes that dependency — but it is n...
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