Sample Transport Systems

Sample transport systems present tremendous opportunities for improved analyzer accuracy. Chemical and petrochemical industries around the world have clearly identified that yield, scrap and compliance improvements can be directly attributed to the effectiveness of the sample transport system. Analyzers will function only as well as the transport system yet this same system is often the most overlooked and misunderstood component. Electric and steam traced tubing provides process fluid freeze protection and temperature maintenance in a variety of analytical and process instrumentation applications including impulse, process, and sampling lines.

Selecting the right process tube for use in analyzer sample transport systems requires consideration of process and application conditions. There are a wide variety of metallic and non-metallic tubes available: welded and seamless 316 series stainless steel and more exotic alloys are also used. Common non-metallic tube materials are PFA, PFE, and PTFE fluoropolymers polyethylene and Halar (ECTFE). Some bundles may also contain coaxial tubing (tube-in-tube) or unheated tubes for calibration gas and blowback lines.

Improper tube selection may lead to a failed analyzer systems caused by adsorption, contaminants in the tube, corrosion stress cracking or gas permeation. Restricted sample flow, long sample lag times, and kinking are also problems often related to tube selection.

Tube Selection for Analyzer Sample Systems Selecting the right process tube for use in analyzer sample transport systems requires consideration of process and application conditions. There are a wide variety of metallic and non-metallic tubes available: welded and seamless 316 series stainless steel and more exotic alloys are also used.

Electric Traced Bundles Maintains freeze protection, close temperature tolerances or viscosity control. Excellent for maintaining long, continuous lengths of impulse lines and piping at consistent temperatures. Good for situations where steam is not available or steam supply could be interrupted, such as during shutdowns. Complete design package - we'll provide engineering support and failure mode analysis, plus we'll recommend accessories that may be required and whether a thermostat will be needed. Material

Steam Traced Bundles It is generally used to provide freeze protection for instrument impulse lines and process lines for analyzers. Light steam tracing provides protection over a longer length than than heavy traced designs.

Insulated Tubing Bundles S-LINE® is designed specifiically for liquid and gas transport lines where heat loss and personnel protection and heat loss are important. S-LINE offers an inexpensive alternative to field insulation and weatherproofing of small diameter lines.

Coated Tubing J-LINE® is used in applications where additional corrosion protection or mechanical protection is required. J Line is not insulated or heated. J-Line tubing is ideal for pneumatic and hydraulic applications in corrosive atmospheres. Industry standard tubing coated with O'Brien SV47 polymer provides increased protection against galvanic and atmospheric corrosion as well as cushioning the tube against wear from vibration.

Heated Enclosures HEATPAK is a partial enclosure system that provides freeze protection and high pour point temperature maintenance for the process wetted portions of transmitter installations.