By: Chett Norton, C.E.T & Alison Brent

Thursday, September 10, 2015

In the gasket industry there are a multitude of tests performed on materials that will supposedly help the end user make an educated decision on which material to use based on specific application criteria. However due to the lack of gasket property knowledge, what often ends up happening is that the end user becomes more confused, running the risk of choosing an incorrect material and causing untimely leaks or even unsafe gasket blowouts.

This article is intended to shed some light on four commonly misinterpreted and misunderstood gasket material tests: Flexibility (ASTM F147); Tensile Strength (ASTM D4745, ASTM F152); Sealability (ASTM F2378); and Maximum Pressure.

ASTM F147 – Standard Test Method for Flexibility of Non-Metallic Gasket Materials

Durlon 9000 Flexibility Test

A sample of Durlon 9000 being checked for flexibility.

This test method measures the gasket material’s Flexibility both transverse and longitudinal to the grain orientation. This test can also determine quality of the gasket material by determining the product’s Flexibility factor.

In this test, several “dog bone” shaped samples (based on the ASTM F147 standard) are cut in both transverse and longitudinal orientations. These samples are are placed in a conditioning oven at 100˚C (212˚F) for an hour then cooled to room temperature in a desiccator. The test material’s thickness is determined with a micrometer and recorded. The test material is firmly held at one point on a circular mandrel (ranging in diameter from 4.8mm to 101.6mm, starting with the largest diameter) and forced slowly to contact 180˚ of the full diameter. This procedure is repeated using decreasing mandrel diameters on a new sample until a failure occurs. A failure is considered to be any cracks, breaks, or surface separations at the end of the Flexibility test. When a failure occurs the mandrel diameter is recorded.

A Flexibility factor can be calculated by taking the Minimum Diameter divided by the Original Thickness. It is important to understand that when looking at the Flexibility factor the lowest possible value is considered a positive result. For example, Flexibility values are a lot like golf scores, meaning the lower the score, the better. Therefore, with Flexibility a value of 4 would be more flexible than a value of 10.

Tensile Strength (ASTM D4745 & ASTM F152)

Durlon 9000 Tensile Test (ASTM F2378)

A sample of Durlon 9000 being pulled during the Tensile testing process.

 

At Triangle Fluid Controls we do 2 different types of Tensile testing using ASTM D4745 and F152 meaning we test both little “dog bones” and big “dog bones”. The test used is dependent on the type of material being tested, i.e. fiber, PTFE, and graphite. These “dog bones” are predetermined test specific shaped samples. Tensile testing is a quality control test by measuring the strength of the product, which in turn, determines the conformance of the manufacturing process. It should be noted that Tensile strength is not equivalent to the maximum pressure rating of the product, but more of a standard internal QA check.

ASTM D4745 – Standard Classification System and Basis for Specification for Filled PTFE Molding and Extrusion Materials

The ASTM D4745 Tensile test involves cutting material both transversely and longitudinally (conditioned based on sample type). These samples are then placed and clamped into our Tensile machine with an extensometer also attached to the sample. An extensometer is used to determine the strain measurement of the material under stress. The machine is then set up and parameters of the sample are imported. The machine is then started and runs until a failure occurs (any cracks, breaks, or surface separations at the end of the test). The results are recorded in psi and percent elongation.

ASTM F152 – Standard Test Methods for Tension Testing of Nonmetallic Gasket Materials

The ASTM F152 Tensile test is similar to the D4745 Tensile test except this test only involves samples to be cut transversely (conditioned based on sample type) and no extensometer is attached. These samples are then placed and clamped into the Tensile machine and the test is performed.

ASTM F2378 – Standard Test Method for Sealability of Sheet, Composite, and Solid Form-in-Place Gasket Materials

This test method is suitable for evaluating the leakage rate, sealing properties and characteristics of gasket materials under a load pressure at room temperature (21-30˚C/70-86˚F).

This testing process involves placing a cut sample (conditioned-based on sample type) using the ASTM F2378 specified die dimensions in between 2 flat steel platens. A seating load of 4,640 psi is applied and nitrogen is introduced into the center gasket cavity at a pressure of 580 psi. A timer is set for one hour, forty-five minutes. The evaluation stage occurs next as a manometer is connected to measure any leakage coming through or around the gasket. The leak rate is recorded at one minute, and again at fifteen minutes. The results are recoded and the average leak rate is calculated. The lower the average leak rate, the higher the gasket’s ability to seal. However there are many units used to measure Sealability (mL/min, cc/min or mL/hr) so you must make sure that you are comparing the correct test method and the reported units as well. Sealability is one of the most important characteristics in today’s sealing world, as even “small” leaks are frowned upon due to worker safety and environmental concerns.

Maximum Pressure

Maximum Pressure is used to determine a value where the material can be used safely (at room temperature). The material samples are pressurized until the gasket “blows” out and then using a FOS (Factor of Safety) a number can be determined, however it should be noted that in most cases, gasket materials are not used at room temperature. What we mean by this is that as gasket material is exposed to elevated temperatures the properties of the gasket change, so it is very important to check a PxT (Pressure x Temperature) chart for the material selected and your specific application (pressure, temperature, and media).

For instance, Durlon 9000 is rated for 1500psi, however as you can see in the below PxT chart at 400°F the maximum pressure would be 1000 psi. The Green area = safe to use; Yellow area = Do not use in these conditions or contact TFC applications engineering.

Durlon 9000 Pressure times Temperature chart

Final Thoughts

Hopefully this gives you a little more understanding and information on these four commonly misinterpreted and misunderstood gasket material tests, so that you can select a quality gasket material or at least be able to compare gasket materials on an “apples to apples” basis. If you are still unsure about gasket material selection, you can download our handy iGasket App, visit our website at www.trianglefluid.com or contact TFC application engineering (tech@trianglefluid.com). Chett Norton can also be reached via Twitter at @TFCgasketguru.



August 13, 2015

Triangle Fluid Controls Ltd.® Set to Release New Blog Covering Hot Industry Topics.

 

Triangle Fluid Controls Ltd. ®, the global Durlon® sealing solutions company, is set to launch their new blog September 2015 in order to provide a valuable resource for engineers, end-users and channel partners who may not have the specialized knowledge of a fluid sealing applications engineer.

“Providing excellent customer service for gasket users is tricky because we serve such a wide range of industries and end-users. We feel everyone should be able to find a reliable and accessible information source for their needs,” says Mike Shorts, Vice President and General Manager of Triangle Fluid Controls Ltd. ® “Not only will we be able to educate users on industry changes and standards, but by providing this resource we will be able to answer the questions we see as ‘hot topics’ on our customers’ and users’ minds. Some of these ‘hot topics’ just aren’t being addressed by others in the market, and that’s where we are prepared to step in.”

Some of the topics TFC plans on tackling are emissions, maintenance, leakage, safety, product lifecycles, and system failures in both gaskets and check valves. The new resource will be updated monthly by a team of contributors with extensive backgrounds in gasket and check valve application in order to help users determine their individual needs.

TFC is currently in the final stages of this new project after a very successful release of their new website late last year. Triangle Fluid Controls Ltd. ® has seen a flurry of web traffic and has noticed a need for this type of specialized technical information. Visit http://trianglefluid.com/category/gasket_blog/ for more details.

Established in 2007 in Belleville, Ontario, Canada, Triangle Fluid Controls Ltd. ® is globally known as the Durlon® sealing solutions company with innovative gasketing products for all major industrial sectors including oil and gas, petrochemical, mining, food and pharmaceuticals, and pulp and paper. Don’t miss a blog update by following Triangle Fluid Controls Ltd. on LinkedIn.
 

 



Triangle Fluid Controls Ltd.® is pleased to announce that they will be a supporting partner of SecureTrack™, a new program designed by Gasket Resources Inc (GRI®) that standardizes gasket materials, equipment, and installation procedures to eliminate bolted joint related non-accident releases (NARs) on railroad tank cars. Durlon® filled-PTFE sealing products, manufactured by TFC, are highly reliable, standardized gasket materials that are compatible with virtually any shipping commodity. TFC is excited to offer the SecureTrack™ technical support, training and customer service to our Canadian end-users.

Maureen Boyle, Rail Equipment Coordinator at Sunoco Inc. had this to say about the SecureTrack™ Program:

“Sunoco has over 3,000 tank cars in our fleet carrying various hazardous commodities. We were pleased to learn through testing by our laboratory that [the] Durlon® 9000 material is acceptable for use in all commodities we ship. Simplifying to one gasket material has helped Sunoco with compatibility, performance and standardization. We have confidence in the suitability and traceability of the branded Durlon® 9000 gasket material and have received excellent technical support, training and customer service.”

In coordination with GRI, TFC is proud to offer these improvements to railway safety in Canada. For more information on the SecureTrack™ program and to learn more about how Durlon® sealing products are compatible for your product shipments, please contact Triangle Fluid Controls Ltd.® at 1-866-537-1133, info@trianglefluid.com or by visiting www.SecureTrackProgram.com.

The Nozzle-Style BNC™ Check Valve Is Long Lasting and Low Maintenance

 

BNC

 

Exton, PA—DFT Inc., an industry leader in the manufacture of valves for more than 70 years, proudly announces the release of its new BNC™ Check Valve, a nozzle-style, axial-flow check valve specifically designed to excel in high-pressure applications.

Many natural gas companies and other power industries are now placing their pipelines below ground and are looking for a one-piece valve they can weld in and bury. The BNC™ Check Valve answers that demand with a precision nozzle-style valve that uses axial-flow technology to eliminate turbulence and prevent erosion and vibration. This design reduces downtime and maintenance costs and boosts capacity and accuracy.

Additionally, the BNC™ Check Valve provides a critical service to the power industry because the valve’s enhanced leak proofing under high pressure virtually eliminates acid and chemical leakage.

The BNC™ Check Valve is a spring-assisted, center-guided, non-slam check valve. It has an in-line globe-style body with butt weld ends, with the seat integral to the valve body.

The one-piece valve is designed for long life and low maintenance. Because it is welded into piping for service, the valve does not have any in-line maintenance capabilities.

The BNC™ Check Valve’s design meets API 6D and ASME B16.34, and its testing meets MSS SP-61 and API 598 (shell and seat). The valve is available in 10″ to 24″ line sizes, and it is constructed of A216-grade WCB carbon steel and other alloys per ASME 16.34 by request.

Trim materials are carbon steel and stainless steel with a hard-faced seat and disc. The valve can be installed either horizontally or vertically and is compatible with steam, water, and gaseous media. Custom sizing is available.

ABOUT DFT INC.

DFT Inc. manufactures severe service control valves and in-line check valves in its Exton, Pennsylvania, facility. DFT takes pride in working closely with end users to solve problems. The results are valves that provide superior performance, long service life, and low maintenance costs. Triangle Fluid Controls Ltd. is the Canadian channel partner for DFT. Our valves are available nationally through our qualified distribution network.

Durlong Sealing Products Logo

Triangle Fluid Controls Ltd. is excited to announce the release of our new DURLON® logo and tagline Durlon Sealing Solutions™. The new logo will become a global symbol of premium quality and superior performing sealing products continuing on the well-established Durlon® brand.

No matter where you are in the world, Durlon Sealing Solutions™ is your trusted partner for industrial sealing applications.

Sealing Devices in the
Environmental Goods Agreement

On April 9th, FSA President Mike Shorts met with senior trade officials from the Canadian Department of Foreign Affairs to discuss the sealing device market in Canada, and the positive and important role that these devices play in environmental protection efforts.

Unlike the USA and Europe, Canada has not fully supported the inclusion of sealing devices in the Environmental Goods Agreement which reduces or removes trade tariffs on environmental goods. Mr. Shorts traveled to Ottawa to educate the Foreign Affairs officials on the necessity of sealing devices so that they may be added to the program. The elimination or reduction of trade tariffs on sealing devices would allow access to better existing technologies at cost competitive prices and provide process industries with products that will exceed existing global emissions regulations.

“Reducing tariffs is a great step towards establishing market access to Canadian sealing device manufacturers and other FSA member companies,” he says.

“The sealing device manufacturing industry in Canada is relatively small compared to the USA, Europe and China but it has a long established history here and continues to be competitive in the global marketplace. Our company, Triangle Fluid Controls Ltd., through affiliated companies in its history, has been in the Canadian sealing products arena since 1922.”

 

Read Empowering Pumps blog here.

 

The Producers of Net Worth with Terry Bradshaw are pleased to announce that Triangle Fluid Controls, Ltd. will be featured in an upcoming segment on topics, trends, and issues related to “Critical Technology Driving Industry in the 21st Century” as part of the show’s “American Industry” series.

Serving as the Canadian source for  DFT In-Line Check Valves, Triangle Fluid Controls will help Terry take viewers along for an inside look into the inner workings of the company and industry.  For more information on this media release, please visit www.networthtelevision.com

NEWS RELEASE
21 November 2014

Belleville, Ontario Canada

Triangle Fluid Controls Ltd. Celebrates the Release of Their New Website

Triangle Fluid Controls Ltd., the Durlon® sealing products company, has released its completely new website offering a single online point of reference for all Durlon® gasketing clients outside of the USA.

Mike Shorts, Vice President and General Manager, development lead of the website commented:

“Considerable thought has gone into the design of our web presence, such that our customers and prospective customers can research our gasketing product and find and contact our regional sales professionals and authorized distributors quickly. Our online product directory, gasket selection tool, media compatibility, and distributor finder can be conveniently accessed on any digital platform in a very straight forward manner.

“Although a great modern website and one with which we are very excited about, webpages alone will never deliver the level of professional service that customers rightly expect from Triangle Fluid Controls. It is essential for the manufacturer and customer to share a comprehensive understanding of the nature of the Durlon® sealing products at the outset of their gasketing needs and this new website allows easy and quick access to our most important product and technical resources for sound engineering design.”

Established in 2007 in Belleville, Ontario Canada, Triangle Fluid Controls Ltd. is globally known as the Durlon® sealing products company with innovative gasketing products for all major industrial sectors including oil and gas, petrochemical, mining, food and pharmaceuticals, and pulp and paper. For more information on Triangle Fluid Controls and our products please visit our website at www.TriangleFluid.com