91麻豆精品久久毛片一级,人妻VA精品VA欧美VA,欧美精品 亚洲日韩,国产日产美国国产一区,亚洲高清无码一二三四五区,亚洲AⅤ一区二区三兔费看性色,一区二区日本免费中文字幕精品

  1. Inner cleanliness requirements: the weight of removable insoluble impurities ≤ 0.27g/m2；maximum size ≤ 200um.
  2. Tension test: more than 2500N
  3. Burst test：high-pressure cooling pipe burst pressure ＞ 14.7Mpa；Low-pressure cooling pipe burst pressure＞9.8Mpa.
  4. Hose vacuum resistance characteristic: OD change cannot be more than 20% camparing with nature condition. 
  5. Hose length variation：Under certain pressure, length variation is between -4% to +2% after test.
  6. O-zone resistance:：Under 8X magnification glass, no visible cracking on hose surface.
  7. Hose Volume variation ratio：rubber material hose volume variation ratio is between -5% and +35%;
?  8. hose tightness：Allowed max tolerance of R134a, nominal bore diameter≤2.0g/md，nominal bore diameter>3.0g/md

Auto conditioning pipeline can be devided into high-pressure pipe and low-pressure by pressure level, and devided into gaseous pipe and hydraulic pipe according to cooling condition. Auto conditioning pipe is consist of aluminum tube, joint, conditioner rubber hose, conditioner bellows, aluminum bushing, filling nozzle, pressure switch, O-ring, plastic fitting.