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What exactly hides behind the standard IEC 61518?
Te dielectric isolation kit is an essential
Corrosion costs the industry enormously
Why? Te task seemed to be quite easy, but so often the devil is in the details. In this case, the requirements were: ● Pressure of 6,000 psi (414 bar) ● Rating: 2,500 VDC/Resistance: 5 Meg Ohms
● Temperature: 176°F (80°C)
THE DEVELOPING PROCESS For a leak-tight sealing system up to 6,000 psi (414 bar), it had to tighten the bolts with a defined torque. Te plastic also had to absorb the forces resulting from this torque. Additionally, the sleeves become very soft when heated to a temperature of 176°F (80°C) and tend to creep. Tis creeping causes the bolt tension and thus the compression of the seal ring to decrease. At this point, leakage can occur. To achieve the goal, the team conducted detailed investigations of the gasket geometry, extensive testing of the composition of different plastic materials. It even tested different contents of glass fibre for its reinforced plastics.
part of the company’s Direct Mount System, as it enables close coupling of electronic flow measurement devices to an orifice fitting. AS-Schneider designed these systems for close coupling in a safe, efficient manner. Tey cut or reduce the effects of gauge line error. Te Pipeline Gas Compressor Research Council and Southwest Research ran a recent study. It looked at pulsation created by regulators and flow control valves. Te team also researched compressors and some piping configurations. Tey found that pulsation may create undesirable levels of square root error. It also creates gauge line error. Pulsation at the orifice meter is a significant source of lost natural gas. Tese errors cause huge economic gains or losses. Tey affect both the buyer and seller in a natural gas pipeline system. Te research made some conclusions about transmitters and electronic flow measurement devices. It found they should use equal length, large orifice constant diameter gauge lines. Tey should also use multi-turn valves to protect electronics
from pressure spikes. Tese should be close coupled to the orifice taps. Te AS- Schneider system minimises or eliminates gauge line error, and it’s easy to install. Also, it’s available in both vertical and horizontal to vertical configurations.
LEAK-FREE MEASUREMENT INSTALLATION AS-Schneider has developed the so-called Schneider DirectMount System – SDMS for short. By using the SDMS, operators reduce the installation costs significantly. Tere’s no need to manufacture and install tube runs, fittings, and expensive pipe stands. Te SDMS reduces potential leak points associated with NPT connection. Te solution also provides a safe, compact, leak-free measurement installation. Te internal porting promotes self-draining of condensates and liquids to reduce freezing issues. It uses the IEC 61518 system, which meets the recommendations of the American Petroleum Institute. Te Gas Processors Association and the American Gas Association have also approved it.
Dielectric isolation kit used in many installations
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