Large diameter flat welding flange has less high-pressure suitability compared to its weld neck counterpart. The basic ring style is suitable for the occasion of low pressure. The butt weld category of the flange is known as a weld neck flange. It suits the occasion of high temperature and pressure as defined in the ASME B16.47 code. Large diameter flanges are widely popularized and used in the sewage treatment industry, wind power industry, chemical industry, and machinery industry.
The versatility of large diameter flanges, alongside using it with larger pipes, has enabled their installation with applications including engineering units, food industries, gas and oil processing, power plants, construction, cement manufacturing, etc.
BENEFITS OF LARGE DIAMETER FLANGES
• Properly installed large diameter flanges are corrosion resistant and come with a wide variety of media uses.
• They are easy to fit in any climate, and the reason is their simple installation. They can be installed easily, even underwater, given the large sealing surface areas.
• Elastomeric sealing gaskets expand the life expectancy of these flanges to at least 50 years.
• They come with long-term protection against corrosion, abrasion, and impact to ensure continued reliable performance when properly manufactured.
Manufacturing of large diameter flanges is usually used in some tank equipment and large-scale furnace to strengthen and connect. The kind of equipment is not typically made as a commodity production run, but rather belongs to the small-batch or single-piece production. The conventional process is to cut the circular plate as per the size of the whole steel plate for plate flanges. After, it needs to be cut off the inner circle on the circular plate. The process method is simple but requires operation space, and large black size, so it is helpful to add a large diameter flange that will cause low economic benefit and low material utilization. Forgings are required for large diameter slip-ons with hubs and weld necks.
The flange must be drilled with bolt holes needed to match with a rubber sealing ring and another flange that is added in the middle. To make sure about the sealing effect, the flatness tolerance of the flange is usually required to be higher by end-user applications, and the overall thickness of the flange plays a supporting role. Therefore, dimensional tolerance and roundness of the outer and inner holes of the flange are not as high as smaller flanges.
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