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Flow Level Pressure Newly Redesigned Tank Blanketing Valve
Shand & Jurs (USA) is proud to announce improvements to its hugely successful 94270 Tank Blanketing Valve. The 94270 Tank Blanketing Valve now incorporates a new internal Teflon®
time and costs. This new Teflon®
available with accessories including filters, check valves and pressure gauges.
“Tank Blanketing” is a process used to maintain a gas barrier in the vapor space of a pressure-tight storage tank. It prevents evaporation, reduces emissions, corrosion, contamination or oxidation and provides gas make-up when internal tank pressure drops. The S&J 94270 Tank Blanketing Valve provides primary vacuum relief by controlling the flow of blanketing gas into the tank during product movement out of the tank.
The 94270 has a balanced piston-operated main valve so that the set point pressure is virtually unchanged at any given inlet pressure within the specified operating
range. The “Vapor Guard” has a modulating type action valve that opens and closes automatically, maintaining a closely controlled blanket pressure and gas flow. The modulating action simplifies the valve design, thus increasing reliability and reducing maintenance costs. The “Vapor Guard” operates in the closed position whenever the tank pressure is satisfied or exceeds the set pressure. Whenever the sensed pressure decreases, the set pressure spring and diaphragm assembly causes a downward force such that the main valve will open proportionately to control pressure and limited capacity. The one and two inch models have a minimum inlet pressure of 30PSI, while the half inch model has a minimum inlet pressure of 20PSI.
Reader Reply Card No New Spiral Magnectic Flux Leakage Inspection Tool
US Manufacturers T.D. Williamson, Inc. (TDW) announced the debut of its patent pending Spiral Magnetic Flux Leakage (SMFL) inspection tool, the latest addition to its range of magnetic flux leakage inspection tools.
Whereas traditional axial MFL technology detects volumetric pipeline anomalies, general corrosion and wide circumferential flaws, the new SMFL tool makes it possible to detect long, narrow defects in a pipe body and in long seam welds. Transverse field inspection (TFI) tools are designed to detect general corrosion, as well as long and narrow metal loss features.
“By combining the capabilities of the standard TFI tool with those of a conventional axial MFL system, the new SMFL tool fills a niche in the market for a system that combines inspection technologies,” said Enzo Dellesite, General Manager - Middle East Operations for TDW. “By doing so, operators can detect and characterise a much wider range of pipeline defects that simply was not possible until now,” he added.
The high resolution SMFL tool offers a number of benefits. For example, while TFI technology relies upon two magnetisers, the SMFL tool requires only one. As a result, the SMFL tool can be paired with MFL technology without having to extend the length of the tool to accommodate it. The ability to pair tools means that multiple datasets are generated in a single run. TDW uses these datasets by overlaying them, which greatly enhances characterisation of anomalies that are revealed during an inspection run. For example, recently TDW ran separate runs with each system in a 16-inch pipe with a .250 wall thickness. While the axial MFL tool did not detect an external axial gouge, data generated by the SMFL tool revealed an external gouge measuring six inches long x .25-inch wide x 40% deep.
With a sampling frequency of up to 750 samples per second, the SMFL tool has an operating pressure range of 300 to 2,000 psi (21 to 137.8 bar) and an in-line temperature range of 14 to 131°F (-10° to 55°C.) It has a minimum bend radius of 1.5D and can travel at up to 8.3 ft/second, making it an extremely adaptable and efficient inspection system.
The addition of the SMFL tool further extends TDW’s comprehensive pipeline inspection services, which features the recently launched 48-inch Gas Magnetic Flux Leakage (GMFL) inspection tool. This tool operates at a steady speed in spite of variations in gas pressure that tend to cause other tools to stall and surge as they move through a gas line.
Reader Reply Card No Watchdog Works Well Under Pressure
Afriso’s (Germany) Watchdog low gas pressure alarm can be used together with an optional pressure gauge with contacts to monitor and display the pressure in gas-filled containers so that alarms can be generated if the container runs low on gas. A pressure gauge with contacts adapted to the application generates an alarm at the alarm unit via a switching contact if the pressure falls below a threshold (this can be set at the pressure gauge to a value between 5 and 95 % of the range). An alarm is also triggered in the case of a cable break.
ATEX Approved Pressure Transmitter Series for a Wide Range of Applications.
The ASENTEC PTEEXi series can be used as a calibration reference or in applications where high accuracy pressure measurement is required from safety valve checks to system pressure verification. The ATEX certificate will allow the PTEEXi series to be used in any industry where there is a risk of flammable gases. These include oil refineries, off-shore platforms, chemical plants, gas production plants, oil and gas shipping or pharmaceuticals. Various pressure ports and liquid filled capillary
systems open a large number of applications. Following ports are available G1/4”, G1/2”, 1/2” NPT, 1/4” AEHP, 1/2” 20UNF, M10x1, M18x1,5, PF3/4” other on request. The liquid filled capillary systems can be used in applications with elevated process temperatures as high as 400o
C the nominal pressure can be as high as
2000 bar. The ATEX approval for gas is II 2 G EEx ia IIC T5 or T4.
ASENTEC GmbH is a manufacturer of pressure and temperature transducers for special applications.
ASENTEC is known as a problem solver. You name the task - ASENTEC solves the problem.
ASENTEC GmbH Weipertstrasse 8-10 D-74076 Heilbronn Tel.: +49 (0) 7131 7 66 97 30 • Fax: +49 (0) 7131 7 66 97 39 Email:
info@asentec.de • Internet:
www.asentec.de
The alarm unit is supplied with a AC 230 V. supply. It features an alarm and an operation lamp, a reset and a test button as well as a relay for supplying the signal to additional alarm devices or to Afriso event reporting systems. In the case of an alarm, the person in charge can then be notified via e-mail, SMS or telephone. The low gas pressure device may not be operated in hazardous areas (EX zones); however, as a result of the intrinsically safe control circuit, the connected pressure gauge with contacts is approved for EX zones 1 and 2. (EC Type Examination Certificate no. TPS 03 ATEX 15639 6). For reliable monitoring of several gas containers, it is possible to connect the appropriate number of pressure gauges with contacts in series and use a single low gas pressure alarm to monitor all of them. Typical applications of the low gas pressure alarm comprise decompression stations, cylinder batteries or cylinder combinations.
Reader Reply Card No
Non-intrusive Ultrasonic Flow Measurement of Liquids and Gases
Unusual conditions demand unusual solutions; this is especially true for oil and gas offshore applications. Conventional flow meters often do not meet the requirements of harsh offshore conditions. This maybe because of short equipment life spans, high maintenance costs or unsatisfactory measurement performance.
Whether the fluids flowing through the pipes are liquids or gases, the Fluxus transmitter types ADM 8127 and
G 801from Flexim (Germany); along with their sophisticated clamp-on shear- and Lamb wave transducers, are ideally suited for reliable and accurate flow measurement in offshore ATEX Zone 1 areas.
The Fluxus ADM 8127 and G801, together with the Variofix transducer mounting fixture, are seawater resistant and exhibit an extreme mechanical durability.
Due to its advanced transducer and digital signal processing technology, the flow meter accurately measures very low flow velocities as well as high and pulsating flow rates over a wide range. Exotic pipe materials and thick pipe walls are neither a challenge as high or low temperature applications.
Due to the non-intrusive measurement principle, Flexim’s Fluxux ADM 8127 and G 801 can be installed without the need for process shut-downs. As there are no parts protruding into the pipe and the transducers are installed with permanent couplings pads, maintenance work is reduced to an absolute minimum.
Reader Reply Card No 182 Reader Reply Card No 183 181 180 179 O-ring coating which improves the performance of the unit and reduces maintenance coating is now part of Shand & Jurs’ standard offering for our ½ inch, one inch and two inch Tank Blanketing Valves. The 94270 is also
Annual Buyers’ Guide 2011
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