*extrusions* eNewsletter article 3 - MAY 2017 - Issue Number 47
NewAge Industries Plastic Tubing and Hose Fluid Transfer Specialists


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JUNE 2017 - Issue Number 48 facebook   linkedin   twitter   google plus
tech talkTech Talk – Pressure Terminology

Pressure – the continuous physical force exerted on or against an object by something in contact with it – often dictates what tubing or hose style and material should be used in an application. Some uses call for reinforced hose to handle pressure, while others can be satisfied with unreinforced tubing in a strong and durable material.

pressure gaugeTypically, hoses are tested at ambient temperatures (68°F-70° F) in a controlled environment to the point of bursting – that determines their burst pressure. Working pressure is calculated using a safety factor related to the burst pressure (usually a ratio of 3:1, 4:1 or 5:1 for tubing and hose available from NewAge Industries). This means that it is generally considered safe to use the tubing/hose up to the given working pressure at room or ambient temperature; working pressures can increase or decrease with changes in temperature. Field testing should be performed to find the actual values for an application.

On to the definitions…

Absolute pressure – A quantity of pressure with respect to total vacuum; equal to the sum of a pressure gauge reading plus atmospheric pressure (14.69 psia at sea level)

Bar – A metric unit of pressure, often called an atmosphere; equal to 14.5 pounds per square inch (psi)

tube burstBurst pressure – The pressure point at which a tube or hose will suddenly and violently rupture (the video to the right shows testing to determine the burst point of welded TPE tubing)

Compressed gas – A gas or mixture of gases having, in a container, an absolute pressure exceeding 40 psi at 70°F or an absolute pressure exceeding 104 psi at 130°F, regardless of the pressure at 70°F

Pressure drop – The difference in pressure between any two points of a component or system

PSI (more commonly: psi) – Pounds per square inch; a typical method of measuring and expressing working and burst pressure

PSIA (more commonly: psia) – Pounds per square inch absolute; used to make clear that the pressure is relative to a vacuum rather than the ambient atmospheric pressure

Working pressure – The maximum recommended pressure at ambient temperature for continuous operation

When you have questions about pressures and your tubing choices, contact us at 800-506-2934, 215-526-2300 or info@newageindustries.com. Engineers are on staff to assist with your application specifics.

 

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NewAge offers Tubing and Hose in a wide variety of materials
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NewAge Industries' AdvantaPure products are manufactured to meet the strict sanitary requirements of the Pharmaceutical, Biomedical, Cosmetic, and Food Industries. Platinum-cured silicone tubing and silicone hose are manufactured in our state-of-the-art clean room and are ideal for applications that require cleanliness, non-toxicity, and resistance to extreme temperature variations. AdvantaPure also provides stainless-steel overbraided and rubber-covered fluoropolymer hose, sanitary fittings, and complete hose assemblies.

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We are your "Fluid Transfer Specialists®"
Contact Us For Experienced Technical Support:
Phone: 800-506-3924 or 215-526-2300
Fax: 800-837-1856 or 215-526-2190
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esales@newageindustries.com

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