红桃影视成人免费_中国按摩xxxx做受a_377人体裸体露私图片_久久亚洲AV永久无码精品_亚洲成国产人片在线观看_国产一a在一片一级在一片

How to Test the Stiffness of Bellows Ring

2025-03-31

Ring stiffness is a key indicator to measure the compression resistance of HDPE double-wall corrugated pipes. The test process needs to simulate the actual stress scene through professional equipment. The following is the popular version of the guide for ring stiffness testing of double-wall corrugated pipes: 1. Test principle Core logic: By slowly compressing the pipe, measure its pressure value when it is deformed by 3%, and then convert it to the pressure per square meter (kN/m 2). Key formula: Ring stiffness (SN) = pressure value (N) Pipe length (m)/deformation amount (m) 2 2. Test steps (super easy-to-understand version) Cut pipe Take a sample with a length of 300mm from the whole corrugated pipe (both ends need to be cut flat). Example: If the total length of the pipe is 6 meters, saw off 30cm for inspection. The device places the sample horizontally between the two flat clamps of the electronic universal testing machine. Make sure that the axis of the pipe is aligned with the center of the fixture (clamp the pipe like a hamburger). Press the pipe to start the testing machine, and let the upper pressure plate slowly press down at a speed of 10mm/min (slower than a turtle crawl). Observe the deformation of the pipe. When the diameter is compressed by ** 3% ** (such as the original diameter of 200mm, pressed to 194mm), stop immediately. The screen of the reading data testing machine shows the pressure value at this time (unit: N). Example: The pressure shows 5000N. The calculation result is substituted into the formula to calculate the ring stiffness: plaintextSN = 5000N 0.3m/(0.03200mm) 2 = 50000.3/(6mm) 2 = 1500/0.000036 = 41666667N/m 2 41.67kN/m 2 (ie SN41.67) Practical application: According to the industry standard rounding, SN41.67 may be marked as SN40 or SN42.5. 3. Precautions (the secret of accurate measurement) Samples should be "regular" The cutting surface must be perpendicular to the axis, otherwise it will lead to uneven force. There can be no scratches or depressions on the inner and outer walls of the pipe (pick smooth ones like selecting watermelons). Environmental stability testing The room temperature needs to be controlled at 232 ° C (too cold or too hot will affect the performance of plastics). Avoid people walking or vibrating equipment during the test (like being quiet when measuring blood pressure). The operation should be "Buddhist". The pressure speed must be strictly carried out according to the standard. If it is fast, the result will be high, and if it is slow, the result will be low. 4. Test Standards and Qualifications National Standard: GB/T 9647-2015 "Thermoplastic Pipes, Determination of Ring Stiffness" Authoritative Certification: The pipes of regular manufacturers (such as Hubei AD Building Materials) will be accompanied by a third-party test report, which can be scanned to verify the authenticity. 5. Why choose AD HDPE double-wall corrugated pipes? Precise Quality Control: Random sampling and testing of each batch of pipes, the qualified rate of ring stiffness is 99.8%. Scene Adaptation: Provide a full range of SN4 to SN16 products to meet the different needs of municipal, industrial, agricultural, etc. Professional services: free to provide ring stiffness testing guidance to assist customers to complete the acceptance.

Immediate consultation: Hubei AD Building Materials Co., Ltd. Service hotline: 173-9998-9993 Official website: www.gaoliangjun.com

One-sentence summary: Measuring ring stiffness is like giving a pipe a "physical examination", when pressed to 3% deformation to see how much force it can bear, the larger the value, the more pressure!

How to Test the Stiffness of Bellows Ringthe1page


主站蜘蛛池模板: 国产真实露脸乱子伦 | 国内精品久久久久久久久齐齐 | "欧美日韩一区 二区 三区 久久精品" | 神马午夜91 | 蜜臀av在线一区 | 中文字字幕在线中文乱码 | 中文字幕 亚洲精品 | 长江现货有色金属 | 长江金属有色金属网现货交易 | 永久在线视频 | 长江金属有长江有色金属网 | 日本天天射| www.中文| 老司机精品视频免费 | 黄色av免费网址 | 另类欧美日韩国产在线 | 91视频免费版黄 | "天天操 狠狠操" | 成年女人永久免费观看视频 | 虐足vk | 国语自产拍91在线a拍拍 | 韩产日产国产欧产 | 女同久久另类99精品国产 | 绝色神偷未删减 | 狠狠操狠狠色 | 香蕉视频在线观看视频 | 国产精品va尤物在观看2021 | 日本成人在线看 | 久久精品久久精品国产大片 | 亚洲欧洲日韩精品 中文字幕 | japan白嫩丰满ⅴideos | 在线不卡国产 | 日本黄色毛片 | 成人动漫h在线观看 | 亚洲AV一二三区成人影片 | free白嫩16sex性hd处 | 一级特黄在线 | 久久久久久综合岛国免费观看 | 国产一区二三 | 香蕉视频xxx| 14日xxxxxxxxx19|