Cyffredin Ansawdd Problemau O Di-staen Dur Pibellau

Cyffredin ansawdd problemau o di-staen dur pibellau

Di-staen dur pibell, as hylif pibell gyda y manteision o cyrydu ymwrthedd a uchel pwysedd ymwrthedd, yw eang defnyddio yn llawer o feysydd o'r fath fel petrolewm, cemegol diwydiant, gwneud papur, a trydan pŵer. Fodd bynnag% 2c yn gwirioneddol cais, rhyw ansawdd problemau yn anochel yn digwydd. Mae hyn erthygl amcanion i dadansoddi rhain problemau ansawdd cyffredin a darparu cyfeirnod ar gyfer defnyddwyr pryd dewis a defnyddio di-staen dur pibellau. Defnydd amgylchedd a hylif math Yn gyntaf o holl, di-staen dur yn nid yn llwyr di-staen. Mae'r hyn a elwir yn rust-rhydd yn ystafell tymheredd a arferol amodau. Fodd bynnag% 2c mewn amgylcheddau arbennig neu pan arbennig hylifau yn yn llifo, mae'n rhaid yn wedi'i dargedu. yn unig gan defnyddio staen deunyddiau y y ymwrthwynebiad y gallu gwrthiant gwasanaeth bywyd di-staen dur yn sicrhau.

Generally used for the transmission of neutral fluids or ordinary non-corrosive liquids, 304 stainless steel is sufficient, but for the transmission of weak acids, it is best to use 304L or better materials. If the salt content is relatively heavy, such as seawater transmission, 316L material needs to be used. For strong acid transmission, super duplex stainless steel is required. Heat treatment (solid solution) Material selection is only the first step. In addition to ensuring the material (mainly nickel content and chromium content), the corrosion resistance of stainless steel is also more important than heat treatment. Solid solution (heat treatment) - After stainless steel butt welded pipe fittings are cold-pressed into pipe fittings, the product will undergo plastic deformation, the balance between molecules is destroyed, and a large internal stress accumulates, which must be eliminated through solid solution. Solid solution is a special process that rearranges the austenite molecular structure. Process parameters, temperature and time must be strictly controlled. Specialty stainless steels, such as 316Ti, also require stabilization to work best.

The influence of welding Another special link of stainless steel pipe fittings is welding. Large-sized butt-welded pipe fittings are pressed and formed from steel plates, and then welded to form elbows, tees, large and small ends, etc. Welding current is a key parameter, and worker skills are also crucial. RT testing is usually required to verify the welding effect. After welding, the treatment of the weld is also very important. In addition to solid solution, it also needs passivation to prevent intergranular corrosion. The corrosion of stainless steel usually includes the following types: intergranular corrosion, chloride corrosion, stress corrosion, electric corrosion, etc. (the main corrosion form of stainless steel elbows). The causes of each corrosion are different. In material selection, Special attention must be paid during production, installation and use. Only by operating in full compliance with standards can stainless steel exert its true effect. Otherwise, the rust of stainless steel will be worse than that of galvanized steel pipes.

Dewis o deunyddiau Yn Yn Ychwanegu, y dewis hen pibellau yw un o y prif prif rhesymau ar gyfer problemau gyda phibell ffitiadau. Rhai unscrupulous gweithgynhyrchwyr defnyddio hen pibellau yn arbed costau. Mae'r moleciwlaidd strwythur o y hen pibellau wedi wedi wedi blino. Mae'n efallai barely last a ychydig mlynedd pan defnyddio yn amgylcheddau arbennig o'r fath fel uchel pwysedd a uchel uchel cyrydol media, bydd bydd fod iawn anodd i defnydd. Gollyngiad yn prone i digwydd, achosi anadferadwy colledion i defnyddwyr. Hyd yn oed yn yn nifer gweithdai y trwch, uchder, deunydd, arwyneb a broses o y di-staen dur pibellau wedi'u cynhyrchu yn yn sylweddol is y safon paramedrau. O cwrs, y pris rhaid fod yn eithafol isel. cynhyrchion yn a elwir farchnad nwyddau.