5 Things to Know Before Buying grooved couplings manufacturer

We previously have introduced different types and combinations of threaded fittings - which have been around for more than a century.

Here we're introducing another common way to join pipe; using grooved fittings. 
An attic sprinkler system using a grooved elbow with couplings.  Use of "mechanical" couplings that could allow faster joining of pipe came to life in by Lieutenant Ernest Tribe. Just a few years later the Victory Pipe Joint Company renamed itself to Victaulic (a combination of "victory" and "hydraulic"), and grew to expand the technology worldwide. 

Today, Victaulic and other manufacturing leaders provide grooved fittings that are often used for pipes in fire sprinkler systems. It is not uncommon for both mains and branch lines to be grooved today.

What are common grooved fittings, and how do they work? Let's introduce them.  An in-rack sprinkler with a branch line using (starting with the sprinkler) a groove x thread reducing elbow
​with a grooved coupling, a grooved piece of pipe, and a grooved tee (connection not shown). PIPE
Let's start with the pipe. In order to give grooved fittings an opportunity to "grip" the pipe and remain in place, they need an opportunity to resist the pressure of the water that is trying to "pull away" the pipe from the fittings which join them together. A grooved coupling about to connect two grooved-end pipes. Note the loose nut and bolt on the right-hand side, allowing the coupling to be expanded and "slip" over the pipe on the left. In order to create a groove in the pipe, steel can either be "roll groove" or "cut groove". Roll groove pipe involves pressing an indentation into the pipe near the end of the pipe. This allows a grooved fitting to slip over the end of the pipe and fit into the groove. Roll groove pipe has the advantage of not reducing the pipe thickness, so it can have more tolerance for corrosion than thinner pipe, similar pipe with threads, or pipe with cut grooves.

Pipe which is cut groove involves cutting into the pipe rather than pressing it. This cutting removes a portion of the pipe wall, making a thinner but smooth interior pipe wall. This thinner wall makes it more susceptible to corrosion, however, for pipe systems with a minor slope, the smooth inside of the pipe does not create a ridge where water can sit and corrode the pipe. Roll Grooved Pipe (top) and Cut Grooved Pipe (bottom). Note the ridge on the inside of the pipe wall for roll groove pipe, and the thinner pipe wall along the cut groove pipe. A tape measure with a "go" or "no-go" measurement to determine if the groove is within manufacturer tolerances. ELBOWS & TEES
Let's start with the basics. Elbows allow bends of 90-degrees (most common), 45-degrees, 22-1/2 degrees, and 11-1/4 degrees.

Why not every possible angle? What if I need to have a 60-degree bend because of my building?

First, it wouldn't be economical to make a fitting of every bend. Second, is that using just two 90-degree elbows back-to-back we're able to create a "swing joint" and make any angle we could want, just by changing the elevation of the pipe that's being joined. Victaulic "FireLock" Grooved Fittings; 
90-Degree Elbow #001 (left), 45-Degree Elbow #003 (center), and Standard Tee #002 (right) One notable specialty with the grooved elbow is a "Drain Elbow", which has the elbow except it includes a drain outlet at the bend of the elbow. This is used all the time with fire department connections which come down a wall and need to be capable of being drained (to avoid having water-charged pipe freeze and burst). This is also called a "Drain-El" or is a Victaulic #10-DR. A wall-mounted fire department connection that is away from the riser, here showing the "Drain Elbow" with a ball drip below. The portion upstream of the check valve is intended to be dry unless the FDC is actively being used in order to avoid freezing water inside. COUPLINGS
Nice sketches, Joe, but that's not how things look in the field!

That's because unlike threaded fittings, the actual pipe joining is by a grooved coupling. The coupling has malleable iron bumps that grip the indent of one groove (pipe/fitting) and connect it to the second groove (the other pipe/fitting).  A grooved coupling (here a Victaulic #009N shown). OTHER FITTINGS
There are a host of other fitting types. Grooved Reducing Tees? Yep. Less common. Less common can equate to more expensive, or at least that's what I hear from contractors familiar with all the pricing nuances.

What other grooved fittings do I often see? 

Reducing fittings, which is a concentric, single-cast piece of metal that has a large groove on one end and tapers down to a smaller groove on another end. One note of caution is using these in the vertical orientation; I've heard it is much better, more stable, and stronger to use a reducing-fitting as opposed to a reducing-coupling when in a vertical orientation. One of my clients goes so far to say to not use reducing couplings at all (where the coupling itself has two different groove sizes). I wouldn't have the expertise to gauge that myself. A flange x groove reducer (left) and a grooved cap (right). There are also reducing adapters, than can accept a flange connection and convert it to a reduced groove connection. 

Crosses are also available, as are caps (like the Victaulic #006 shown above on the right) which can terminate the end of a branch line. These caps even have 1-inch threaded opening options for easy auxiliary drains. 
Many manufacturers have equipment and components with grooved ends that can readily attach to pipe and fittings.

The most important thing when buying malleable pipe fittings or grooved pipe fittings is the quality. If the quality is not up to standard, it will not only affect the construction period and bring economic losses, but also cause pipeline leakage and catastrophic consequences.

Goto CNG to know more.

Therefore, when you buy fire-fighting pipe fittings such as malleable or grooves, you must confirm whether the products produced by this manufacturer have relevant product quality certification. Certified products generally have undergone strict third-party product quality tests, and have certain guarantees in terms of safety in use.

The malleable pipe fittings produced by Jianzhi Group passed the FM certification of grooved products in , and passed the FM certification of malleable steel products in . These two certifications demonstrate the high quality and reliability of Jianzhi Group’s products. Internationally, FM is one of the most important certifications in the field of malleable products. The following article will explain in detail why FM certification is important and what this certification means for a product.

What is FM certification

FM Global Insurance was founded in . Currently, more than one-third of the world’s top 500 companies are FM insurance customers, including well-known industry giants, such as Airbus, Boeing, Intel and FedEx, etc. The vast majority of these corporate giants’ production sites around the world are underwritten by FM Global Insurance.

As the bearer of claims liability, FM naturally does not want the client’s property to be in danger. To this end, FM has established a unique insurance operation mechanism in the world – “based on engineering technology”. From the design and site selection stage of the insurance customer’s new production base/plant, to the actual construction and final acceptance, FM’s on-site engineering and technical personnel will participate in and always provide advice and guidance on aspects involving property safety. With more than 1,800 field engineers worldwide, FM conducts more than 62,000 field visits each year and provides insurance services for more than 130,000 production sites in 132 countries.

In order to ensure that customers can choose products of excellent quality, FM Approvals—FM Approved Company was established under FM Global Insurance Company. It can be said that the birth, development and growth of FM certification company is for a clear purpose: “certify truly excellent products and help customers protect property safety”. Because of this, FM certified products are not all-encompassing, but are clearly aimed at building materials, fire protection products, and electrical products that are closely related to property safety.

Value of FM certification

The FM standard is not well known due to its unique underwriter background. When building contractors in developed countries such as the United States choose fire protection products, whether the target product has obtained FM certification is the first question they must consider. In the construction of various large-scale fire protection projects in China, the certification requirements for FM certification are also very common.

FM certification is generally recognized around the world, and obtaining this certification is a symbol of product quality, indicating that the product or service has passed the highest international standard testing. On a global scale, only fire protection products that have obtained FM certification can be insured for related property insurance or fire insurance, otherwise the insurance company refuses the insurer to insure.

At present, more than 45,000 products worldwide have passed FM certification. FM certification standards can not only meet the requirements of consumers for product quality, but also the status of products in the market will be greatly improved. The FM test report of industrial and commercial products is generally recognized around the world, and the “FM” certification mark is also a symbol of the highest quality in the minds of consumers.

At the same time, the FM Approval mark somehow transcends the value of the certification itself. Customers of FM Global Insurance also tend to use FM Approved products to protect their property. Because FM certified products represent reliable performance and can effectively reduce the risk of assets. At the same time, products that have obtained FM certification can also be recognized by the global market and have great commercial value.

Contact us to discuss your requirements of grooved couplings manufacturer. Our experienced sales team can help you identify the options that best suit your needs.

Products that have obtained FM certification are equivalent to entering the North American market, not only can they be recognized by a large number of FM customer groups, but also can obtain installation licenses from fire authorities in various regions of North America.

In addition, FM certified products can also enter the countries and regions where the laboratories mutually recognized by the FM certification body are located. If the region has a mutual recognition agreement with FM, products will no longer require local re-testing when entering these markets, and can also obtain the logo of the country and region’s certification testing agency.

FM certification of Jianzhi Group

The malleable or grooved products produced by Jianzhi Group have always been known for their high quality. In order to further demonstrate the product quality of Jianzhi Group to customers, the company has always attached importance to various authoritative third-party inspections. The malleable pipe fittings produced by Jianzhi Group passed the FM certification of grooved products in and the malleable in . So far, all products of Jianzhi Group have passed FM certification.

Products with FM certification will have the FM logo printed on the surface of the product. I hope you must pay attention to this when inspecting the supplier’s products. Jianzhi Group owns the largest professional malleable manufacturing plant in China, and has the strongest malleable fitting production capacity in China. You can also click the link below to watch the product demonstration video of Jianzhi Group. Through the video, I believe you will feel more intuitively how exquisite these pipe fittings are.

The products of Jianzhi Group have also passed many product certifications, and we intend to introduce these certifications one by one in a series of articles. These certifications are the recognition of the quality of Jianzhi Group’s products. We are very willing to convey the high quality of Jianzhi Group’s products through the explanation of these certifications. Of course, you are welcome to follow us, and you are also welcome to inquire with us.

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