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[Bolted Fastening Specialty Magazine] BOLTED 2020, Issue No. 1

[Bolted Fastening Specialty Magazine] BOLTED 2020, Issue No. 1

How to make steel sustainable throughout the entire life cycle, from raw materials to product lifespan.

This document introduces challenges in the development of rocket engines for the upper atmosphere, lessons learned from the potential of floating offshore wind power generation and the development of high-speed railways running through deserts, and rethinking the use of manufacturing and steel for sustainable development. It presents methods to make steel sustainable throughout the entire life cycle, from raw materials to product lifespan. We encourage you to read it. [Contents (excerpt)] - Challenges in the development of rocket engines for the upper atmosphere - Potential of floating offshore wind power generation - Lessons learned from the development of high-speed railways running through deserts - Rethinking manufacturing and the use of steel for sustainable development - Super bolts solving maintenance challenges *For more details, please refer to the PDF document or feel free to contact us.

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【Bolt Tightening Troubles】Causes of Leaks at Flanges and Improvement Measures

【Bolt Tightening Troubles】Causes of Leaks at Flanges and Improvement Measures

We will introduce the phenomenon of fluid leaking from between the flanges due to internal pressure in the container.

This article introduces the troubles that occur at the bolt connections around heat exchangers and piping, specifically focusing on the causes and improvement measures for leaks at flanges. The causes include "insufficient management of axial force (surface pressure)," "displacement and damage of gaskets," and "reduction of axial force due to temperature cycles (essential factors)." There is a minimum surface pressure required to prevent leaks, but due to the above causes, it is not possible to secure and maintain the necessary surface pressure, leading to leaks between the flanges. As an improvement measure, there is the "tensioning method," which allows for management of bending stress and axial force. It can be tightened without rotation, thus avoiding the effects of friction, allowing for axial force management, and preventing displacement by pulling straight. 【Proposed Products】 ■ Superbolt ■ Boltight *For more details, please refer to the PDF materials or feel free to contact us.

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Nortlock X Series with Railway Vehicle Adoption Examples

Nortlock X Series with Railway Vehicle Adoption Examples

Simultaneously solve both "rotational looseness" caused by reverse rotation and "non-rotational looseness" that does not involve rotation!

The "Nortlock X Series" is a product that addresses both "rotational loosening" and "non-rotational loosening" with a single solution. By combining the spring effect (which compensates for the reduction in axial force due to non-rotational loosening) and the wedge locking function (which prevents rotational loosening), it eliminates the need to only address the higher-risk issues or to complicate the work process by combining multiple products. It is used in various bolt fastening applications across the global railway industry, including bogies, couplers, brake systems, outfitting, track maintenance, and sleepers. 【Features】 ■ A single product that addresses both rotational and non-rotational loosening ■ Multi-wedge lock mechanism ■ Numerous certifications, primarily in Europe ■ Size (steel): M6 to M20 *For more details, please refer to the PDF document or feel free to contact us.

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