Every calculator on this site so far checks one failure mode at a time: burst, or collapse, in isolation. Real strings don’t fail that way — pressure and axial load act together, and a pipe that comfortably passes a burst check and a collapse check separately can still yield when both loads are on at
Why Burst and Collapse Checks Alone Aren’t Enough: The Triaxial Envelope Read More »
Torque specs on a bolted flange look precise — “450 ft·lbf, three passes, star pattern” — but the number behind that spec is built from a chain of assumptions, and the weakest link in that chain is almost always friction, not the bolt itself. Our Flange Bolt Torque calculator walks through that chain explicitly so
Torque Is a Proxy for Tension: The Logic Behind Our Flange Bolt Torque Calculator Read More »
Ask five reservoir engineers to size a surface choke for the same well and you may get five different answers — not because anyone did the math wrong, but because there is no single, universally accepted formula for two-phase flow through a choke. Our Choke Bean Sizing calculator is built around that reality: it lets
Why Five Engineers Can Size the Same Choke Five Different Ways Read More »
Two codes get named on almost every pressure-equipment analysis scope in this industry — API 6X and ASME BPVC Section VIII Division 2 — and it’s a fair question why you’d need both, or which one actually governs a given job. The short answer: they’re not competitors. One is a general pressure-vessel design code; the
API 6A and API 6D both cover valves used in oil and gas service, and it’s a common point of confusion which one applies to a given piece of equipment. The short version: it comes down to where the valve sits. API 6A governs wellhead and tree equipment; API 6D governs pipeline valves. Same broad
API 6A vs. API 6D: What’s the Difference Between Wellhead and Pipeline Valve Standards? Read More »
API TR 5C3 and ISO/TR 10400 both show up as the cited basis for casing and tubing burst, collapse, and tension calculations, and it’s a fair question whether picking one over the other actually changes anything. The short answer: for the core equations, no — ISO/TR 10400 was developed specifically to be the internationally-recognized equivalent
API TR 5C3 vs. ISO/TR 10400: Are They Really the Same Standard? Read More »