|
TESTING LAB Paulin Research Group verifies the accuracy of its software with real-world tests by routinely performing piping fatigue / acoustic / flange leakage tests, as well as cryogenic studies.
|
||
 |
 |
 |
|
The Ammonia Storage Vessel Above was strain-gaged during hydro for verification of "Zick" type stresses predicted using Nozzle/PRO. PRG also load-tested the manway located in the elliptical head. Other testing included axial loading of the support saddles to verify saddle stresses predicted in Nozzle/PRO. |
PRG lab generation of a load-deflection curve for use in "Markl" type fatigue testing. Loads and deflections were measured to generate a curve that describes the test components reaction to loading. During the fatigue test, a specified deflection was repeatedly applied. The actual load can then be estimated from the load-deflection curve. |
The "Markl" test rig with a horizontal vessel is in place for an axial fatigue test of the support saddle and shell. An axial load is applied to the vessel to simulate sloshing or other events that would generate axial forces on the support saddles. This test was used to verify the Nozzle/PRO approach to saddle design. |
|
RECENT / ONGOING TESTS RTJ Flange Joint Test Finite element models for groove distortion are checked using actual flanges and joints. The test relies on new models in Axi/PRO. Buried Soil Test PRG is running a series of lateral and axial load soil tests comparing the American Lifelines Alliance method against the Peng, CAESAR and B31.1 methods. Soils tested are sand, clay, and mixtures. Virgin soil from the Freeport LNG facility is also being tested for stiffness properties.
Axially Constrained Pipe Buckling Test Buckling due to internal pressure in an axially constrained tube is a phenomena that can effect long pipelines on the seabed and some long GRE/FRP pipelines. Tests using rubber, copper and GRE pipe from Future Pipe Inc are now underway, and are being conducted in cooperation with Dynaflow Engineering. Cryogenic Buckling Test Working with Mr. Bob Robleto from KBR, Paulin Research Group is preparing a paper that demonstrates certain cryogenic properties of carbon steel welds and plate. Fillet welds in flat plates, charpy specimens, core pipe jacket specimens (similar to LNG pipe-in-pipe systems), and 505 tensile specimens (notched and un-notched) are included in the test at the present time. The purpose of the test is to evaluate the level of containment offered by carbon steel in a cryogenic environment.
|
||
