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Last updateWed, 19 Sep 2018 3pm

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Technical

In Line Weld Repairs of Valve Defects

Valve Repair Activities per ASME Section I & B31.1

Photo 1 WEBSIZEIf you have valves in your plant manufactured from F-91 or C12A material you may have problems and need repair services. In a 2-year period at our valve service company, a number of valuable observations were made about the cause of repairs necessitated by defects or operation, and the most effective solutions.


Offshore High Pressure Relief Valve

Riser PipesOil wells drilled in deep waters typically face many difficulties with pressure, especially as the wells are placed on the bottom of the ocean floor. Oil and gas recovered from this depth can see pressures ranging 5,000 PSIG to 30,000 PSIG and possibly higher when flowing out of the well into the riser pipes. This is where many of the problems begin, and is the inspiration for development of valve technology that can withstand these extremely high pressures.

Criticality of Torque and Load in Bolted Joints

bolting headline“No matter how big and complex the machinery gets," said John Gans during his presentation at the November 2012 Valve Repair Council Repair Meeting & Exhibition in Houston, "at its heart, holding everything together, is the humble little bolt."

Dr. Gans repeatedly stressed the importance of having well-trained personnel conducting the critical function of bolting, and provided a comprehensive overview of material normally provided in a full one-day course.

Installed Gain and Control Valve Selection

Monsen headshot 330pxJon F. Monsen, Ph.D., P.E., is a control valve technology specialist, with more than 30 years' experience. He has lectured nationally and internationally on the subjects of control valve application and sizing, and is the author of the chapter on "Computerized Control Valve Sizing" in the ISA Practical Guides book on Control Valves.

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