{"id":3829,"date":"2026-01-07T10:00:00","date_gmt":"2026-01-07T10:00:00","guid":{"rendered":"https:\/\/microductconnector.com\/blog\/the-difference-between-pu-air-hose-and-pa-air-hose\/"},"modified":"2026-10-12T03:01:54","modified_gmt":"2026-10-12T03:01:54","slug":"the-difference-between-pu-air-hose-and-pa-air-hose","status":"publish","type":"post","link":"https:\/\/microductconnector.com\/bs\/blog\/the-difference-between-pu-air-hose-and-pa-air-hose\/","title":{"rendered":"Razlika izme\u0111u PU zra\u010dne cijevi i PA zra\u010dne cijevi"},"content":{"rendered":"
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PU hose and PA hose are two popular types of hoses used for various applications. While both serve the purpose of fluid or air transfer, they have some distinct differences in terms of their properties and performance.<\/span><\/p>\n

Jedna primjetna razlika izme\u0111u PU crijeva i PA crijeva je njihova tvrdo\u0107a. PU crijeva su mek\u0161a u pore\u0111enju sa svojim PA pandanima. Ova meko\u0107a \u010dini PU crijeva fleksibilnijim i lak\u0161im za manevriranje, omogu\u0107avaju\u0107i jednostavnu instalaciju i upotrebu u uskim prostorima. S druge strane, PA crijeva imaju ve\u0107u tvrdo\u0107u, \u0161to ih \u010dini krutijim i manje fleksibilnim.<\/span><\/p>\n

\"Proizvod:<\/figure>\n

Another significant difference between PU hose and PA hose relates to their temperature and pressure resistance. PA hoses have better high temperature and pressure resistance compared to PU tubes. This makes them suitable for applications where the transfer of hot fluids or gases is involved, as well as for high-pressure systems. On the contrary, PU hoses are not as resistant to high temperatures and pressures, limiting their use in such conditions.<\/span><\/p>\n

PU crijeva su poznata po izvrsnoj otpornosti na habanje. Mogu izdr\u017eati tro\u0161enje, \u0161to ih \u010dini idealnim za primjene gdje crijevo dolazi u kontakt s grubim povr\u0161inama ili je izlo\u017eeno \u010destim pomjeranjima. Ova svojstva PU crijeva osiguravaju njihovu izdr\u017eljivost i du\u017ei vijek trajanja, daju\u0107i im prednost u odnosu na PA crijeva.<\/span><\/p>\n

\u0160to se ti\u010de hemijske otpornosti, i PU i PA crijeva pokazuju dobru otpornost na \u0161irok spektar hemikalija. Mogu izdr\u017eati izlaganje uljima, rastvara\u010dima, kiselinama i lu\u017einama, \u0161to ih \u010dini pogodnim za razne industrijske primjene. Me\u0111utim, va\u017eno je napomenuti da specifi\u010dna otpornost na odre\u0111ene hemikalije mo\u017ee varirati ovisno o formulaciji crijeva, stoga je klju\u010dno odabrati odgovaraju\u0107i tip crijeva za namijenjenu primjenu.<\/span><\/p>\n

Kada je rije\u010d o isplativosti, PU cijevi su obi\u010dno povoljnije u odnosu na PA cijevi. To ih \u010dini popularnim izborom za primjene gdje su bud\u017eetska ograni\u010denja va\u017ena. Osim toga, PU cijevi su relativno lagane, \u0161to olak\u0161ava rukovanje i transport.<\/span><\/p>\n

\"Vatrootporni<\/figure>\n

Ukratko, razlika izme\u0111u PU i PA crijeva le\u017ei u njihovoj tvrdo\u0107i, otpornosti na temperaturu i pritisak, otpornosti na habanje, hemijskoj otpornosti i isplativosti. PU crijeva su mek\u0161a, fleksibilnija i nude odli\u010dnu otpornost na habanje, dok PA crijeva imaju bolju otpornost na visoke temperature i pritisak. Izbor izme\u0111u njih ovisi o specifi\u010dnim zahtjevima primjene, kao \u0161to su temperatura, pritisak i priroda te\u010dnosti ili plina koji se prenosi.<\/span><\/p>\n

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2026 buyer update: compare the complete hose duty<\/h2>\n

PU hose<\/strong>, PA hose<\/strong> and the selected fitting system<\/strong> should be specified together. Current engineering guidance puts the emphasis on the actual duty cycle: tube OD and wall, bend radius, movement, temperature, medium and the pressure value at that temperature. PU and PA are useful candidates in different conditions, but neither material label is a universal rating.<\/p>\n\n\n\n\n\n\n\n
Check before approval<\/th>\nDokaze zatra\u017eiti<\/th>\n<\/tr>\n<\/thead>\n
Pressure and temperature<\/td>\nWorking rating for the exact size, with derating or temperature limits.<\/td>\n<\/tr>\n
Media exposure<\/td>\nCompatibility chart for the actual fluid, concentration and exposure time.<\/td>\n<\/tr>\n
Motion and assembly<\/td>\nBend radius, abrasion guidance, tube tolerance and approved connector series.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Record these fields in the RFQ and link the chosen tube to the site’s pneumatic parts<\/a> range. Avoid using burst or test pressure as a continuous operating value.<\/p>\n

Can a nominally matching fitting be used for either hose?<\/h3>\n

Only when the supplier approves the material, OD, wall and tolerance for the exact fitting. A matching nominal size is not enough.<\/p>\n

What is the safest way to compare price?<\/h3>\n

Compare the same duty cycle, replacement interval, fitting family and test requirement; a lower unit price can be offset by early leaks or rework.<\/p>\n

Which current source should a buyer keep with the order?<\/h3>\n

Keep the exact tube datasheet and compatibility chart, plus the fitting drawing and assembly instruction. Parker’s technical catalogue is useful context, but it does not rate every supplier’s tube.<\/p>\n

Frequently asked questions about PU and PA air hose<\/h2>\n

Which hose is more flexible, PU or PA?<\/h3>\n

PU is commonly chosen for flexibility, but the actual bend radius depends on tube size, reinforcement, temperature and the manufacturer’s data.<\/p>\n

Is PA always better for high pressure?<\/h3>\n

PA often has higher stiffness and may suit demanding pressure conditions, but only the exact size and rating can answer the question.<\/p>\n

Which hose resists abrasion better?<\/h3>\n

PU is frequently considered for moving or rubbing applications, yet verify the abrasion method and service conditions rather than relying on a generic material claim.<\/p>\n

Can PU and PA use the same push-in fitting?<\/h3>\n

Only when the fitting manufacturer approves the tube material, OD, wall and tolerance. A matching nominal size alone is not enough.<\/p>\n

How should chemical compatibility be checked?<\/h3>\n

Identify the actual fluid, concentration, temperature and exposure time, then consult the tube supplier’s compatibility chart.<\/p>\n

What should be recorded when ordering replacement hose?<\/h3>\n

Record material, OD, wall, colour, pressure and temperature conditions, medium, bend or motion requirement, length and fitting code.<\/p>\n

Reference<\/h2>\n