Hydrostatic testing pressurizes completed wellhead assemblies with water to 1.5 times rated working pressure, verifying structural integrity and seal performance before installation. Test pressure must be held for minimum durations specified by API 6A, typically fifteen to thirty minutes depending on equipment size and rating. Pressure decay exceeding allowable limits indicates leakag... https://globalsealstech.com/product-category/oil-gas-seals/api-6a-wellhead-equipment-seals/