Industrial Hose

Chemical Hoses

Setting Safety Guidelines for Hose Assemblies

NAHAD first recognized there was a need for hose fabrication guidelines in the early 1990’s. While many hose distributors were utilizing the RMA Hose Handbook for some guidance with their fabrication, there was no specific information available that defined the basic elements of safe and reliable, application-specific hose assembly fabrication, and that needed to change. 

In this article, we’re going to discuss NAHAD’s Hose Safety Institute and why it’s important to work with a hose fabricator that’s affiliated with the program.

  • What is the Hose Safety Institute?
  • Why should I work with a member of the Hose Safety Institute?

What is the Hose Safety Institute?

Back in 1995, NAHAD started assembling committees of engineers from hose and fitting manufacturing companies in order to develop and define specific hose safety recommendations and best practices for the industry.

These guidelines were developed to assist hose assembly distributors, manufacturers and end-users by providing a basic set of performance factors related to the proper selection of components and recommendations for the design, fabrication, and specification of hose assemblies.

Since then, NAHAD has continued to improve upon these specifications and make more recommendations for changes and developments as time goes on.

Introduced in 2011, NAHAD’s Hose Safety Institute was designed to oversee these ongoing changes to their Hose Assembly Guidelines along with the hope of keeping the industry interested in their ongoing support for hose assembly safety, quality and reliability. 

Fast forward to today and the Hose Safety Institute’s (HSI) resources are now serving as the basis for educating all NAHAD members and end-users on industry-leading performance standards and top-tier hose assembly specification, design, fabrication, handling, and management.  

Why should I work with a member of the HSI?

One of the main concerns for a customer with industrial hose assemblies is that they want to make sure that their products, especially those going into particularly hazardous environments; meet certain industry quality, safety and performance standards.

Having the ability to distinguish hose distributors who have a commitment to safety from those who don’t is extremely valuable to the customer.

The last thing a customer wants is a hose assembly to fail needlessly, resulting in downtime, spills, fines or personal injury.

Working with a HSI member ensures the customer that their product has meet quality standards and that the equipment they are using has been methodically and carefully assembled and tested.

It also means they have committed to using HSI safety guidelines and to meeting other qualifications, giving customers peace of mind and confidence in their hose assembly.

If you have any questions on hose assemblies or safety guidelines, feel free to send us an inquiry online or call us at 1-800-234-3033 and we will make sure to get back to you as soon as possible.

*REF: NAHAD The Association for Hose and Accessories Distribution website.

pressure-treated

6 Things to ask for when Traceability Matters

There are many factors to consider when selecting hose and connections for critical process applications but one that’s often overlooked or misunderstood is traceability.  In the case that safety is a primary factor in your application, consider demanding one or more of the following traceability options.

1. Permanent Marking or Engraving – A qualified manufacturer will be able to provide a variety of options for permanently marking an assembly with your unique information.  You might consider marking assemblies with your specific order information or individual application information that can help operators identify if a hose is suitable for their application.  Whatever your needs, be sure your supplier is capable of providing this important option.

2. Proof Test Records – Whether your application requires customized proof testing criteria or you want it completed to default NAHAD test standards, make sure that the manufacturer is able to supply detailed test records upon request.  The test document should be directly tied to your purchase order and should include a record of the qualified operator who performed the testing as well as a notation of the certs for any calibrated instrumentation used during the test.

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3. Lot Tracking – A manufacturer of a hose assembly is often said to be building a “hose system” that includes elements from various sources.  For the most demanding applications, consider requesting lot traceability for the sub-components of your system.

4. Certified Material Test Reports – CMTR’s are often available for high alloys including stainless steel.  If your end connections or hose are metallic and compatibility is critical, request CMTR’s at time of quote.  While sometimes available after the fact, this documentation is always easier to obtain if you request it ahead of time.

5. Serialization – If you’d like to identify the origin of each individual hose “system” you put in service, ask for serialization.  The best manufacturers will be able to permanently mark each assembly with a unique serial number that is traceable back to the part’s origin.  A serialization system can tie all of the traceable elements of your hose “system” back to the start, ensuring you’ve received accurate components that were fabricated by qualified technicians.

serial-number

6. Forensics – In the case that you ever have an issue with an assembly you’ve put in to service, ask your supplier if they will be able to provide a detailed failure analysis in writing.  The best can provide test data as well as x-ray and other forms of forensic data.

forensics-pipe

Vacuum Hoses for Fall Clean up

October is here and football season’s in full effect (Go Bills)!  Which means just one thing. It’s not long until the ground is covered in leaves and debris.

Are your town and municipal trucks ready for the fall? Get your vacuum hoses soon before the leaves have fallen.

Peerless offers a wide variety of flexible vacuum hoses for residential, commercial, landscaping and municipal requirements.

In fact we partner with over twenty different major hose companies, so we can always provide the best fit and solution for your specific applications. Give us a call today!

Vacuum hose

5 things to consider when selecting connections for liquid cooling servers

When it comes to selecting components for liquid cooling, there are a lot of materials out there to choose from and it can seem a little overwhelming.

Not to worry… the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) has made some wonderful recommendations for what supply lines, connectors, pumps, manifolds and hardware materials we should be using for closed loop systems.

Here are 5 things to consider when you are selecting connections to build a liquid (water) cooling server/supercomputer.

1. Wetted Materials

The types of materials you choose are very important. ASHRAE recommends the following materials for supply lines, connectors, pumps, manifolds and hardware that make up the closed loop.

  • Copper
  • Brass with less than 15% zinc content and without lead content
  • Stainless steel – 304L or 316L –
    It is common for stainless steel manufacturers to provide Certified Material Test Reports (CMTRs) for their components. Request the CMTR at time of purchase.
  • EPDM rubber – peroxide cured –
    Ask for a certificate of conformance related to the peroxide curing process.

2. Wetted Materials to Avoid

According to ASHRAE, you should never use any of the following materials as part of your closed loop water cooled system:

  • Aluminum
  • Brass with greater than 15% zinc (unless corrosion inhibitor is added to protect high zinc brass) or brass containing lead
  • Irons (non-stainless steel)

3. Proof Pressure Testing

Your closed loop systems may include items such as flexible hoses. If this is the case, a test certificate from the manufacturer of these items should be requested. The test certificate should specify the media used to test the component, the pressure the item was tested to and the length of time the pressure was held.

While pressure testing hose assemblies, it is common for water to be used as a test media. You should insist that your component be delivered completely dry and free of residue.

During the hose assembly fabrication process, it is possible for debris to be left in the component. Specify the level of cleanliness you require, from dust free to high purity.

4. Keep your system free of debris

The nature of a closed loop system creates the potential for entrapped debris to break free and restrict the flow rate of your cooling media.

Strainers or side-stream filters may sometimes be needed to remove debris from the line.

Items such as hose assemblies may become sources of entrapment, depending on the style of hose used and the way it was installed.

ASHRAE 6.1.4.2 explains in detail some of the various design and operating criteria to consider when layout out your TCS.

5. The Velocity of Liquid in your TCS

The velocity of the water in the rack’s liquid cooling loop piping must be controlled to ensure that mechanical integrity is maintained over the life of the system.

Velocities that are too high can lead to erosion, vibration, and water hammer, while other velocities that are too low can lead to lower pressure drop and lower pumping power required to transport the liquid.

If there is any flexible tubing required, it should be maintained below 5 ft/s (1.5 m/s).

That’s our list of top 5 things to consider, but of course there may be other things  to consider  depending on the complexity of the system.

*REF: Liquid Cooling Guidelines for Datacom Equipment Centers, 2nd Edition.

How It’s Made, Peerless Fabricated Hose Edition

Our new video gives you a behind the scenes look into how one of our Peerless PROCESS hoses are fabricated.  Our ferrules, fittings, and hose itself all come together to form a PROCESS hose which is hydrotested and has mechanically etched serial numbers.