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Industry Headlines

U.S. Second Quarter GDP Growth Revised Up

Friday, 30 September 2016  |  Chris Guy

Real GDP in the U.S. increased at an annual rate of 1.4% in the second quarter of 2016, up from 1.1% in the last estimate, according to the Department...

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Industry Headlines

Siemens Industry Partners for Self-Funded Efficiency Project

1 DAY AGO

Montgomery County, TN has partnered with Siemens Industry Inc. to begin a nearly $5 million, self-funded efficiency project. The project will begin in late October and will be completed by fall of 2017.

Siemens has guaranteed the savings – including 2,473,263 kWh of electricity per year; 34,154 c...

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Wolseley Reports 2016 Full Year Results

2 DAYS AGO

Wolseley plc delivered an improvement in overall results for the fiscal year ending July 31, 2016, up 8.5% from last year. Revenue of $18.7 billion was 4.2% ahead at constant exchange rates and 2.4% ahead on a like-for-like basis. Price deflation, particularly in the U.S., reduced revenue by 1.5%. Imp...

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Propane Drove 2016 U.S. Petroleum Product Export Growth

23 HOURS AGO

In the first half of 2016, the U.S. exported 4.7 million barrels per day (b/d) of petroleum products—almost 10 times the crude oil export volume—an increase of 500,000 b/d over the first half of 2015. While U.S. exports of distillate and gasoline increased by 50,000 b/d and nearly 140,00...

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$900 Million Natural Gas Power Plant Planned for Ohio

1 DAY AGO

EmberClear Corp. of Houston has announced plans for a new $900 million natural gas-fired electric power generation plant. The 1,000-MW Harrison Power Project will be built over 60-acres in Harrison County, OH. EmberClear said it will take 18 to 36 months to win approval of various state and federal ag...

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U.S. Second Quarter GDP Growth Revised Up

3 HOURS AGO

Real GDP in the U.S. increased at an annual rate of 1.4% in the second quarter of 2016, up from 1.1% in the last estimate, according to the Department of Commerce. In the first quarter, real GDP increased 0.8%.

The most notable change from the last estimate to this one is that nonresidential fixed inve...

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Durable Goods Orders Unchanged in August

1 DAY AGO

New orders for manufactured durable goods in August were little changed at $226.9 billion, the U.S. Department of Commerce announced, following a 3.6% July increase. Economists were predicting a 1.5% decrease in August. Excluding transportation, new orders decreased 0.4%. Excluding defense, new orders...

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Pipeline Valves—Always Ready

vmfall11_pipeline1

From time to time, we will re-post particularly well-received 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. This article on Pipeline Valves, initially ran on November 7, 2011.

This nation is crisscrossed by hundreds of thousands of miles of crucial pipelines that transport vital feedstock from sources to the places where it’s transformed into fuel and products. For the valve industry, that translates into millions of dollars of business.

According to Hart Data and Mapping Services, the United States has over 700,000 miles of crude oil and natural gas pipelines—about 100,000 miles of crude onshore pipelines and over 600,000 miles of onshore gas pipelines. This number stands to greatly increase as drilling in the various shale plays across the continent occurs. These seemingly endless strings of pipe have one thing in common: They all contain large numbers of valves optimized for pipeline operating conditions.

WHAT’S IN A PIPELINE?

Both quarter-turn and multi-turn block valves as well as check valves are used in pipeline service. Those built for gas or crude oil pipeline service are designed and tested in accordance with the American Petroleum Institute (API) specification 6D “Pipeline Valves.” The document, which is also published by the International Organization for Standardization as ISO 14313, includes requirements for gate, ball, check and plug type valves. Prior to the mid-1950s, the choice of valve for use in pipeline blocking applications was easy—gate valves were used because the pipeline ball valve had not been invented yet. Some plug valves also were used back then, but the majority of the designs for these valves were reduced-port type that were not piggable.

The term “piggable” has nothing to do with breakfast meat choices. Rather, it means being “pig-capable”—in other words, the devices designed to clean or inspect the interior of the pipeline (the “pigs”) also may be passed through the bore of the valve without catching on a reduced bore or other interior projection in the valve. A requirement in API 6D gate valves is that their inside bore dimensions are precisely specified to allow this passage of pigs.

vmfall11_pipeline_sidebarWith the advent of quality pipeline ball valves over the past few decades, sales of pipeline gate valves have fallen. Meanwhile, pipeline ball valves, which are trunnion style, are now making inroads in all types of pipeline service, particularly in natural gas. Still, holdouts exist.

“Some companies are staunchly entrenched in the gate valve,” according to David Fehrenkamp, a senior sales engineer with Cameron. He also adds that “in many natural gas pipeline operations, quarter-turn has taken over 100%.”

So why do many pipeline owners favor the gate valve for pipeline service? Product pipelines that carry fluids such as gasoline, distillates, diesel fuel and other finished petroleum products are a popular place for the rough and ready gate valve. “We use slab gate valves for most of our main line valves, but we do use expanding gate valves on our product line from Texas City to Pasadena,” says Billy Daigle, maintenance services specialist for Marathon Pipe Line LLC (MPL). “We use expanding gate valves for station isolation valves and pig launchers. Pig launcher and receiver service is harder on valves because of the debris from the pigging operation, so we choose expanding gates because of their toughness,” he adds.

vmfall11_pipeline2Ball, check and manifold valves are commonly used in pipeline service.

The quarter-turn vs. gate valve debate gets hotter when cost becomes the prime factor for selection. The quarter-turn trunnion pipeline ball valve is much cheaper to make than the jumbo-sized gate valves, with their large and expensive body castings. Another factor that tips the pendulum toward quarter-turn pipeline valves is the availability and delivery of quarter-turn products. Because drilling in the shale plays across the country is exploding in terms of how fast it’s occurring, Fehrenkamp says the requests from customers for delivery time is “rush, rush, rush, I need it now!” A domestically produced trunnion pipeline ball valve can be built in roughly four weeks, which is about the time needed to get a good gate valve casting under the luckiest of circumstances. An additional four to six weeks might then be required to complete the gate valve machining, assembly and testing.

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