How the API 6A hydrostatic shell test works: test pressure at 2x or 1.5x working pressure, the 3 and 15 minute holds, and the acceptance criteria.
API 6A Hydrostatic Body Test: Test Pressures and Hold Times Explained Read More »
What API 6A PR1 and PR2 mean, what a PR2 validation test involves, and why most operators now specify PR2.
API 6A PR1 vs PR2: What the Performance Requirement Means Read More »
SSV and SCSSV compared: where each sits, how they fail safe, the standards that cover them, and how they work together in a well shutdown.
Surface Safety Valve vs Subsurface Safety Valve: How Wells Shut Themselves In Read More »
Gate valves and ball valves compared for wellhead and pipeline service: how each seals, strengths, limits, and why trees still use gate valves.
Gate Valve vs Ball Valve in Oil and Gas: Which Is Better for Your Service? Read More »
How a tubing hanger works: carrying the tubing weight, sealing the annulus, the BPV profile and control line ports, and how it fits with the tubing head adapter.
What Is a Tubing Hanger? How It Suspends and Seals the Production Tubing Read More »
API 6A temperature classes K, L, N, P, R, S, T, U, V, X and Y with their °F ranges, how combined classes like P+U work, and when derating applies.
API 6A Temperature Classes K to Y: What the Letters Mean Read More »
API 6A material classes AA, BB, CC, DD, EE, FF and HH explained: body and trim materials, general vs sour service, and how to choose.
API 6A Material Classes AA to HH: How to Pick the Right One Read More »
What API 6A PSL 1, 2, 3, 3G and 4 mean, what each level adds in testing and traceability, and how operators choose one.
API 6A PSL 1 to PSL 4 Explained: Which Product Specification Level Do You Need? Read More »
Slip-type and mandrel-type casing hangers compared: how each one hangs and seals the casing, the pros and cons, and how to choose.
Slip-Type vs Mandrel-Type Casing Hangers: How They Work and When to Use Each Read More »
How R, RX and BX ring joint gaskets differ, which flanges each one fits, and why they are never reused. With a 6B and 6BX selection guide.
R vs RX vs BX Ring Gaskets: Which One Goes Where? Read More »