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German customer audit

Sep 26, 2019

In August 2019, we received an inquiry from a German company about purchasing pipe fittings through the website. This inquiry puts high demands on the back arc of the elbow.

Everyone knows that both the pipeline and the seamless elbow are subjected to a lot of pressure during operation. In general, the safety factor of the thickness of the seamless elbow designed and installed is about six times. Taking a medium-pressure pipeline as an example, the maximum operating pressure of the elbow is PN6.4. Therefore, the elbow used in the medium-pressure pipeline is guaranteed to withstand at least the pressure above PN30. Of course, with the corrosion of the pipeline, the seamless elbow will also be corroded to varying degrees. In order to ensure its safe operation, the necessity of overhaul is also great.

The current process of making seamless elbows will lead to the phenomenon of back arc thinning. In general, the thickness of the back arc is about 2 mm thinner than other places. Of course, many projects have evaded many risks during the design phase, because the seamless pipe head has been replaced before the elbow has a dangerous accident. But because the thickness of the back arc has been used as a key point to determine the life of the seamless elbow, and even the safety of the entire piping system.

WH is a professional carbon steel tee manufacturer, focusing on pipeline equipment products for 20 years, and has accumulated a large amount of technology and production experience. For the key points affecting product quality and longevity, we will focus on controlling and guaranteeing the delivery of our products to our customers.


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