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Last updateFri, 23 Jun 2017 4pm

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Why Air Valves are Needed in Water Applications

Why Air Valves are Needed in Water Applications

Air valves are hydromechanical devices d...

Achieving Profitability Through Maintenance Management

Achieving Profitability Through Maintenance Management

One of the distinctions between maintena...

Control Valve Positioner Performance Diagnostics

Control Valve Positioner Performance Diagnostics

There has been discussion for some years...

Are Your Safety Instrumented Systems Proof Tests Effective?

Are Your Safety Instrumented Systems Proof Tests Effective?

Many people assume that a proof test of ...

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Industry Headlines

ITT Announces President of Industrial Process Business

1 DAY AGO

ITT Inc. has appointed David J. Malinas as president of its Industrial Process business, reporting to Luca Savi, ITT's COO. In this role, Malinas will be responsible for delivering the strategic and operating plans of ITT's Industrial Process business, which employs about 2,500 people globally and h...

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Chesterton Expands Environmental Consulting Expertise

3 DAYS AGO

A.W. Chesterton Company  is expanding its global environmental solutions expertise with the addition of two highly experienced industrial emissions specialists, Bronson Pate and Beau Stander. Both will be joining FluidEfficiency, a Chesterton business group. Pate and Stander will serve in the ro...

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Smart Technology Transforming Oil & Gas Industry

2 DAYS AGO

“A new cadre of services companies, trying to sell the energy industry on the promise of a more efficient digital age, is fighting to get smart technology onto pipes, tanks, platforms and drills, in some cases deeply discounting prices to gain market share,” the Houston Chronicle reports .

C...

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U.S. Refineries Running at Peak Levels

3 DAYS AGO

Gross inputs to U.S. petroleum refineries, also referred to as refinery runs, averaged a record high 17.7 million barrels per day (b/d) for the week ending May 26, before dropping slightly to 17.5 million b/d for the week ending June 2 and 17.6 million b/d for the week ending June 9. According to th...

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Economic Indicators Index Rises for Fifth Straight Month

18 HOURS AGO

The Conference Board Leading Economic Index (LEI) for the U.S. increased 0.3% in May to 127.0, following a 0.2% increase in April, and a 0.4% increase in March.

“The U.S. LEI continued on its upward trend in May, suggesting the economy is likely to remain on, or perhaps even moderately above, its...

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U.S. Manufacturing Technology Orders Continue Strong Recovery

1 DAY AGO

Manufacturing technology orders made year-over-year gains in April according to the latest U.S. Manufacturing Technology Orders report from The Association For Manufacturing Technology (AMT). It was also the first month that orders showed gains year to date for 2017.

Monthly orders were up 12.3% compar...

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Playing the Valve Standards Game

Although efforts have been made to coordinate U.S. standards with those of foreign standards-making bodies, surprisingly few standards have crossed borders intact. Still, it pays to know what choices there are, especially in light of the fact that the U.S. no longer overwhelmingly dominates the standards creation scene.

Imagine driving down the highway and seeing two different speed limit signs side by side. Which do you adhere to, especially in light of the fact that ignorance of the law is no excuse! This analogy is similar to what the PVF industry faces today: Which standard do you pick when multiple standards exist for the same product or procedure?

Twenty-five years ago, the valve world was regulated by the many American-produced valve standards. Although other national standards organizations in countries such as Great Britain, Germany and Japan existed, their influence was nowhere near that of the American Petroleum Institute (API), American Society of Mechanical Engineers (ASME), Manufacturers Standardization Society of the Valve & Fitting Industry (MSS), and other red, white and blue standards development groups.

However, as the scope of domestic U.S. manufacturing has narrowed, the influence of non-U.S. standards development organizations has broadened, most notably in the form of the International Organization for Standardization (ISO). Today, somewhat of a clash exists between the traditional U.S. standards and the emerging strength of ISO’s valve standards. The result is an uneasy truce as the world’s process industries and valve manufacturers sort out which valve standards they want to follow.

BACKGROUND OF U.S. VALVE STANDARDS

United States valve standards have a long history, dating back to the first quarter of the 20th century. The first standard to make reference to valves was the Boiler and Pressure Vessel Code, published by ASME in 1915. Although it did not go into detail on design, this boiler document referenced safety relief valves. The creation of MSS in 1924 opened the door for a number of additional valve-related standards, beginning with the organization’s first document on radiator valves in 1925. In fact, MSS created most valve-related standards from the 1920s until WWII.

In 1939, the American Standards Association (ASA) published the first edition of B16e, a document that would later morph into ASME’s B16.34, Valves, Flanged, Threaded and Welding End, which is the still the most popular valve design standard in use today. API published its first refinery valve standard in 1949, with the initial edition of API 600, API Standard on Flanged and Welding End Steel Wedge-Gate and Plug Valves for Refinery Use. This standard has been revised many times and is still very much in use, although its title has changed to Bolted Bonnet Steel Gate Valves for Petroleum and Natural Gas Industries.

Since the 1940s, U.S. valve standards activity has boomed with dozens of documents created by all the major standards-making bodies, plus additional offerings by relative newcomers to the valve standard scene—The Instrument Society of America (ISA) and the American Water Works Association (AWWA).

Until about 1990, American valve standards were the unchallenged leader worldwide. But as the domestic American valve manufacturing base began to erode, the previously unopposed dominance of American valve standards was challenged. The emergence of huge new markets in the Far East, as well as new manufacturers springing up worldwide, resulted in a cry for valve standards that were more international in flavor, which meant primarily ISO-created documents.

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