2026/03/18
How can surface defects in screw fasteners be quickly identified?
The quality of screw fasteners has always been a top priority for Xin Chun and its customers. While there are specific standards for inspecting fasteners, some aspects can be somewhat cumbersome to implement. So how can we conduct a preliminary inspection of fasteners in a more straightforward manner? To address this, we will take surface defects as our starting point and briefly describe several common types of such defects. With a thorough understanding and practical application, we believe that you will be able to quickly identify substandard fasteners simply by examining their appearance. The following outlines various surface defects and their corresponding visual characteristics: 1. Cracks—quenching cracks typically exhibit irregular, intersecting patterns with no discernible orientation.
2026/03/18
Introduction to Insulating Boards
Insulating boards, also known as insulating rubber mats, insulating pads, insulating shims, and insulating blankets, are widely used in substations, power plants, distribution rooms, laboratories, and on-site live-line operations. The structure of an insulating board requires that both the top and bottom surfaces be made of rubber insulating material free from harmful irregularities. Harmful irregularities refer to defects that disrupt the uniformity and smooth surface profile, such as small holes, cracks, localized protrusions, cuts, inclusions of conductive foreign matter, creases, gaps, uneven corrugations, and casting marks. In contrast, harmless irregularities are surface imperfections that arise during the manufacturing process.
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Contact: General Manager Wu
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Address: No. 1, Xinning West Road, Group 6, Ningtong Residence, Jiang’an Town, Rugao City, Jiangsu Province
Nantong Longyu Rail Equipment Co., Ltd.
Contact: General Manager Wu
Address: No. 1, Xinning West Road, Group 6, Ningtong Residence, Jiang’an Town, Rugao City, Jiangsu Province
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