精品久久久久国产免费,亚洲国产精品久久网午夜,被强到爽的邻居人妻完整版,免费无码的AV片在线观看

常熟國強和茂管材有限公司

Sinupower Heat Transfer Tubes Changshu Ltd.
CN EN

400-100-7068

+ 微信號:WEIXINHAOMA

Your location : Home > News > Company Dynamics

Classification and application scope of precision aluminum tubes

Source:en      Release date: 2022-05-17
Information summary:Precision aluminum tube is a kind of high-precision aluminum tube material processed by cold drawing or hot rolling. Knowing the product variety is more conducive to your choice, the variety of aluminum pipes is completely comparable to the diversity of biological species in small areas
Precision aluminum tube is a kind of high-precision aluminum tube material processed by cold drawing or hot rolling. Knowing the product variety is more conducive to your choice, the variety of aluminum pipes is completely comparable to the diversity of biological species in small areas. Now let me introduce to you.
  First, the classification of precision aluminum tubes: precision aluminum tubes are divided into two categories: precision aluminum tubes and welded precision aluminum tubes (seamed tubes). According to the cross-sectional shape, it can be divided into round tube and special-shaped tube. The widely used is the round precision aluminum tube, but there are also some square, rectangular, semicircular, hexagonal, equilateral triangle, octagonal and other special-shaped precision aluminum tubes. For precision aluminum tubes that are under fluid pressure, hydraulic tests must be carried out to check their pressure resistance and quality. It is qualified if no leakage, wetting or expansion occurs under the specified pressure. Carry out curling test, flaring test, flattening test, etc.
  Second, precision aluminum tubes: precision aluminum tubes are made of aluminum ingots or solid tube blanks through perforation to make capillaries, and then hot-rolled, cold-rolled or cold-drawn. The specification of precision aluminum tube is expressed by outer diameter * wall thickness mm. Precision tubes are divided into two categories: hot-rolled and cold-rolled (dial) precision tubes. Hot-rolled precision tubes are divided into general precision tubes, low and medium pressure boiler precision tubes, high pressure boiler precision tubes, alloy precision tubes, stainless precision tubes, petroleum cracking tubes, geological precision tubes and other precision tubes. In addition to general precision tubes, low and medium pressure boiler precision tubes, high pressure boiler precision tubes, alloy precision tubes, stainless precision tubes, petroleum cracking tubes, and other precision tubes, cold-rolled (dial) precision tubes also include carbon thin-walled precision tubes. Tube, alloy thin-walled precision tube, stainless thin-walled precision tube, special-shaped precision tube. The outer diameter of hot-rolled seamless tubes is generally greater than 32mm, and the wall thickness is 2.5-75mm. The diameter of cold-rolled precision tubes can reach 6mm and the wall thickness can reach 0.25mm. Higher dimensional accuracy than hot rolling.
  Third, the general use of precision tubes to ensure the strength and flattening test. Hot-rolled precision tubes are delivered in a hot-rolled state or heat-treated state; cold-rolled precision tubes are delivered in a heat-treated state.
  Due to the advantages of no oxide layer on the inner and outer walls of the precision seamless aluminum tube, no leakage under high pressure, high precision, high finish, no deformation in cold bending, no flaring, no cracks in flattening, etc., it is mainly used to produce products for pneumatic or hydraulic components, such as Cylinders or cylinders can be seamless pipes or welded pipes. Precision tubes are widely used in automobiles, motorcycles, electric vehicles, petrochemicals, electric power, ships, aerospace, bearings, pneumatic components, seamless aluminum tubes for medium and low pressure boilers, etc., and can also be used in bearings, hydraulics, machining and other fields!
亚洲av无码专区在线播放| 欧美成人少妇人妻精品视频| 国产精品毛片av999999| 狠狠做五月四房深爱婷婷| 久久人妻av中文字幕| 久久婷婷激情综合色综合俺也去| 又大又粗又爽又黄的少妇| 少妇愉情理伦片丰满丰满午夜| 久久人人爽爽人人爽人人片AV| 久久99精品久久久久久9蜜桃| 亚洲国产综合精品一区| 私人毛片免费高清影视院| 亚洲久热无码av中文字幕| 国产SUV精品一区二区四| 年轻内射无码视频| 性色av一二三天美传媒| 最新中文字幕av无码不卡| yyyy111111少妇影院| 国产又色又爽又刺激在线观看 | 亚洲av不卡无码国产| 久久午夜神器| 日本无人区码卡1卡2卡免费| 韩国乱码卡一卡二4399| 人人爽人人爽人人片av| 无套内谢老熟女| 天天天欲色欲色www免费| 日韩AV无码成人无码免费| 国产自国产在线无毒不卡| 精品久久欧美熟妇www| 国产婷婷色综合av蜜臀av| 久久99精品国产麻豆不卡| 国产在线无码视频一区| 中文字幕丰满伦子无码| 扒开腿狂躁女人爽出白浆| 色噜噜av亚洲色一区二区| 内射人妻少妇无码一本一道| 18禁黄网站禁片免费观看女女 | 日日摸夜夜摸狠狠摸婷婷| 日韩人妻无码中文字幕视频| 国精品人妻无码一区二区三区性色| 国产精品无码久久久久久|