What’s Your Temperature?

For decades, valve manufacturers have provided the maximum recommended working pressures and temperatures for their products, based on the materials used in the pressure-containing parts.


MSS Publishes Revised and New Industry Standards

The Manufacturers Standardization Society (MSS) of the Valve and Fittings Industry is excited to announce publication of the new Standard Practice SP-158-2021, Supplemental High-Pressure Gas Test Procedures for Valves.


Welding Specifications Issues

Q: I need to qualify a welding procedure specification per the ASME Boiler and Pressure Vessel Code.


Tariff Pressure Builds on Valve Industry

In the last year, one word has dominated U.S. trade policy: tariffs.


Monitoring Pressure Relief Devices

The purpose of a process plant control system is to keep process variables at the desired operating point and within safety limits.


VMA’s New Chair Cites Deep Need for Technical Know-How

Ask David Hughes, the new chairman of the Valve Manufacturers Association of America (VMA), what he sees as the most significant pressure the valve industry of today faces and he’ll point to the need to find new ways to offer and create expertise.


Creep Strength Enhanced Ferritic Materials in Thermal Power Applications

The designers of modern thermal power plants continue to work hard to improve plant efficiency by increasing the heat rate as a function of main-steam pressure and temperature.


Lifecycle Management of Pressure Relief Valves

Accurately specified and appropriately maintained pressure relief valves (PRVs) are critical to protect plant personnel and equipment against unexpected overpressure events.


From Cannon Balls to Pressure Seals: Graphite for Sealing

From time to time, we re-publish well-received or particularly valuable articles that have previously run on VALVEMagazine.com so that those who might have missed them will be able to catch up on the best of the best.


Process Instrumentation in Oil and Gas

Process instrumentation is an integral part of any process industry because it allows real time measurement and control of process variables such as levels, flow, pressure, temperature, pH and humidity.


Unique Operating Dynamics of Trunnion-Mounted Ball Valves

For a very long time, the idea has existed that a trunnion-mounted ball valve can be opened under full differential pressure if the piping system can withstand the rapid increase in pressure and the forces induced by it.


Low Cracking Pressure in Chemical Processing Condensate Lines

Steam condensate is the liquid by-product formed when steam goes from the vapor state to the liquid state; this process occurs in a wide range of applications, across virtually all industries.


Wireless Technology Optimizes Production in Mining Operation

Natural Soda operates seven production well pairs in Colorado to produce saturated nahcolite brine for manufacturing sodium bicarbonate (baking soda). Mining nahcolite requires very careful monitoring of temperature, pressure and flow to not only optimize production performance—but also to mine the product sustainably and protect the freshwater aquifer.


Design Considerations for High-Temperature Sealing

With growing pressure to combat fugitive emissions and meet strict industry regulations, understanding the latest sealing technologies and design considerations for component solutions in severe applications is becoming increasingly critical.


High-Pressure Test Enclosures for Valve Assemblies

As drilling operations explore ever greater depths and pressures, operating pressures for new valve assemblies are going beyond traditional limits.


Avoid Water Hammer Problems in High-Pressure Hydraulic Systems

Water hammer, high-velocity fluid flow and contaminated hydraulic media are among the worst enemies of high-pressure hydraulic systems.


The Dos and Don’ts of Isolating Pressure Relief Valves

Typically, isolation valves are used to block off a pressure safety valve (PSV) from system pressure, so that maintenance on the valve or related equipment can be conducted without a shut down.


New Test Stamp and More Updates on Pressure Vessel Codes

A new test organization program and stamp has been authorized by the National Board of Boiler and Pressure Vessel Inspectors (NBBI), effective February 2016.


Intermediate Class Valves, the Forgotten Classification

These days, piping designers use automated systems that default to standard classifications such as pressure classes of 150 to 2500 for valves and associated equipment.

Mistakes and Misconceptions in Valve Leak Testing

Normally, valves are pressure tested by the factory to check for leaks before they’re shipped.


Valve Positioners Offer Improved Control Valve Performance

By closely controlling the pressure and temperature of both heating and cooling mediums within heat exchange systems, the use of an automated control valve can help assure the efficient transfer of heat.


Introduction to Pressure Relief Devices - Part 1

When the pressure inside equipment such as boilers or pressure vessels increases beyond a specified value, the excess pressure may result in a catastrophic failure.


Back to Basics: Pressure Relief Devices, Part 2

In Part 1 of Pressure Relief Devices, which appears in VALVE Magazine’s Winter 2016 issue, the author stresses the vital role pressure relief devices play in keeping end-user industries that deal with pressurized equipment safe.


NAM Monday Economic Report - September 21, 2015

In deciding not to start raising short-term interest rates, the Federal Open Market Committee (FOMC) said, “Recent global economic and financial developments may restrain economic activity somewhat and are likely to put further downward pressure on inflation in the near term.” As such, the Federal Reserve has chosen to see how the next few months transpire before opting to begin the process of normalizing rates, likely at the December 15–16 meeting, depending on the strength of incoming data between now and then.

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