What Is a Forged Ball Valve 丨 Why Grain Structure Matters, When to Choose Forged Over Cast, and How to Verify You Got One
A few years ago I was called in to investigate a Class 900 10-inch ball valve that had cracked at the body during a hydro test. The valve was supposed to be forged A105 steel. The test pressure was 3,330 psi – standard 1.5 times the Class 900 rated pressure of 2,220 psi. The crack […]
What Is a Floating Ball Valve 丨 How It Works, Where It Excels, and When to Upgrade to Trunnion
I once had a plant manager call me about a 3-inch floating ball valve on a steam condensate return line. The valve was PTFE-seated, Class 300, had been in service for about four years, and was leaking steam from the stem at maybe 20 drips per minute. He wanted to know if he should replace […]
What Is a Flanged Ball Valve 丨 Flange Types, Gasket Selection, and Bolt Torquing That Prevents Leaks
A contractor once called me from a site in Saudi Arabia where they’d just received twenty-four 10-inch Class 600 flanged ball valves for a gas processing plant. The valves were installed, the flanges were torqued, and the system was pressurized to 800 psi for hydro testing. Within two hours, six flange joints were weeping. Not […]
What Is a Casting Ball Valve 丨 How Castings Are Made, Inspected, and When They Are the Right Choice
A valve distributor once sent me photos of a 12-inch Class 600 ball valve body that had cracked during a hydrostatic test at 2,220 psi. The body was a WCB carbon steel casting. When we sectioned it, the fracture surface showed a shrinkage cavity about 8mm in diameter, roughly 15mm below the inner surface of […]
Industrial Ball Valve Standards and Testing 丨 API 6D, API 598, Fire-Safe, and Material Certification Explained
A quality manager at a valve distribution company once told me something that stuck: “We don’t sell valves. We sell the confidence that when you close the valve, the flow stops.” An industrial ball valve that doesn’t seal is not a valve. It’s a very expensive pipe fitting. The confidence that a ball valve will […]
How to Choose an Industrial Valve Manufacturer 丨 What Separates a Supplier From a Partner
In 2017, a petrochemical plant in the Middle East ordered 300 valves for a new process unit. Gate, globe, check, and ball valves. Classes 150 through 900. Carbon steel and stainless. The procurement team sent the same RFQ to seven manufacturers, evaluated the quotes on price and lead time, and awarded to the lowest bidder. […]
How to Choose an Industrial Ball Valve 丨 What Actually Matters and What Nobody Tells You
About eight years ago, a procurement manager at a refinery in Southeast Asia called me in a panic. They’d ordered twenty-four 8-inch Class 300 ball valves for a crude oil transfer line. The valves arrived on site, passed visual inspection, got bolted in, and the system was pressurized to 600 psi. Within 48 hours, three […]
