What is the compressive failure of a joint sheet?
There are several issues with joint sheets, but I will explain the most common case, which is compression failure. ◆Details of the problem 〇Cracks occurred around the gasket, making it extremely thin. ◆Possible causes 〇Compression failure due to excessive tightening. 〇Excessive load applied to a part of the gasket due to lack of parallelism of the flange or deformation. 〇Localized slippage of the joint sheet due to uneven application of paste. ◆Countermeasures 〇Tighten without exceeding the allowable tightening surface pressure of the gasket. 〇Problems caused by improper construction such as single-sided tightening, insufficient tightening, or excessive tightening. 〇Correct the parallelism and deformation of the flange. 〇When applying paste, apply it thinly and evenly.
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■Things to be cautious about with non-asbestos joint sheets 〇 Tighten with sufficient force from the beginning 〇 Do not retighten after a period of time following temperature rise → The gasket hardens due to heat, and retightening after hardening may lead to gasket breakage which is a concern 〇 When used for steam seals, special care is needed as hardening is more likely to occur → Compared to asbestos joint sheets, higher tightening force is required, and the lifespan is also shorter
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What causes leaks when using gaskets? - Surface leak edition -
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Daiko is a manufacturer specialized in processing various industrial products, including gaskets and packing. With industry-leading processing equipment, including one of Japan's largest water jet cutting machines, and a wide range of materials such as joint sheets, rubber, resin, and metal, we meet our customers' diverse needs. Leveraging the technology and experience we have cultivated over 50 years, we provide high-quality, short-lead-time, and low-cost products to contribute to solving our customers' challenges. To respond to our customers' varied needs, Daiko's production bases are equipped with various processing facilities. Among them, the water jet cutting machines, with a total of four installed at our Osaka headquarters and Tokyo branch, boast one of the largest scales in the country. The maximum processing range is W4,000 × L5,800 mm, allowing for the high-precision manufacturing of large-diameter gaskets and packing. By maximizing material efficiency, we achieve the provision of 'high quality at low cost.'