Weld neck flanges made of stainless steel are an indispensable part of acid-resistant pipework. Using this exceptional material gives high corrosion resistance, so installations can work even in unfavourable weather and in aggressive environments.
Which fittings you choose depends on temperature, pressure and working conditions. Weld neck flanges are one of many steel components on the market that improve the safety and performance of an installation. Stainless steel was patented a little over a hundred years ago, yet today it is an important ally of industry worldwide. Many regard it as a material of the future: easy to work, exceptionally durable and recyclable. All of that comes from the alloying mixtures that give the steel its distinctive properties.
What are weld neck flanges?
A weld neck flange introduces an additional neck where the pipeline meets the flange. For the joint to be sound, that neck has to be correctly dimensioned and precisely matched to the pipe. Stainless steel weld neck flanges stand out for their strength and their resistance to harsh external conditions. Welded and forged flange joints call for fittings of this kind. On equipment designed for heavy loads they are mandatory, because safety regulations are strict.
What sizes do weld neck flanges come in?
Stainless steel producers work hard to meet the enormous demand from their customers, which is why weld neck flanges are offered in a range of sizes. They are made to the highest DIN standard and come in many grades. The nominal diameter DN and the pressure rating PN determine, among other things, the number and size of the bolts used. As noted above, weld neck flanges have to be matched precisely to the installation – which is why it is worth consulting a customer service specialist for detailed technical advice and further information.
Where weld neck flanges are used
Weld neck flanges are used as components of process installations. They go into pipelines, particularly in refining, mining and gas. They can also form part of water, refrigeration and heating installations. This acid-resistant fitting is used in any equipment that demands high mechanical performance, at high and low temperatures alike. When choosing a stainless steel producer that makes weld neck flanges, it pays to look to companies with international standing and experience.
Safety is not something to gamble with. Quite apart from the financial penalties that follow from an installation failing to meet the regulations, flanges of inadequate quality can lead to a disaster in which human life is at risk. In the chemical or mining industries, contamination of the natural environment is a real possibility too. Good flanges are a basic part of any properly built installation. Economising on safety is a false saving that costs more in the long run.
