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Dɛn ne sanitary stainless steel pipe?

Hwɛ: 0 Ɔkyerɛwfo: Site Editor Publish Time: 2022-03-15 Mfiase: Beaeɛ

Wɔde dadeɛ a ɛnyɛ den (aduane grade) a ɛnyɛ den a wɔde fa nsuo mu no di dwuma kɛseɛ wɔ mfuo ne nnwuma pii te sɛ nnuru, video, beer, nsuo a wɔnom, abɔdeɛ a nkwa wom ho mfiridwuma, nnuru a wɔde yɛ adwuma, mframa a wɔde tew ho, wimhyɛn nuklea adwumayɛ ne ɔman no sikasɛm mu adansiɛ foforɔ. Nneɛma pii wɔ hɔ a wɔde fi amannɔne ba afe biara.

1. Nhwehwɛmu a ɛfa dade a ɛnyɛ den ho .

Wobetumi de AES kwan no ne SPS kwan no nyinaa adi dwuma de ahwehwɛ dade a ɛnyɛ den no ani de ahu sɛnea dade a ɛnyɛ den no mu ne akyi no tumi nsɛe. Analysis diameter a AES de ma no sua koraa, a ebetumi ayɛ nea ennu 20nm. Ne dwumadi a edi kan ne sɛ ɛbɛkyerɛ nneɛma a ɛwɔ mu. Nhwehwɛmu bo a ɛwɔ XPS kwan so no bɛyɛ 10μm, a wɔde di dwuma titiriw de kyerɛ nneɛma a ɛwɔ hɔ a ɛbɛn asase ani no.

Scanning a wɔde mfiri ayɛ no fɛfɛɛfɛ a ɛyɛ 316 dade a ɛnyɛ den a wɔde AES ne XPS detectors ahyɛ mu no kyerɛ sɛ nhwehwɛmu a ɛyɛ den sen biara a ɛyɛ dade a ɛnyɛ den a ɛwɔ dade a ɛnyɛ den so no yɛ 15nm, na ɛma wonya nsɛm a ɛfa sɛnea wɔde passivation layer no yɛ ne ne kɛse ho. corrosion resistance ne nea ɛkeka ho.

Sɛnea nkyerɛase no kyerɛ no, chromium ne nickel a ɛwɔ austenitic stainless steel no mu, na ebi wɔ molybdenum, titanium, ne nea ɛkeka ho, a mpɛn pii no chromium 10.5% anaa nea ɛboro saa wom na ɛwɔ corrosion resistance pa. Nneɛma a ɛko tia corrosion no yɛ nea efi ahobammɔ su a ɛwɔ chromium-rich passivation layer no mu ba. Passivation layer no taa yɛ 3-5nm thick, anaasɛ ɛne atom 15 yɛ pɛ. Passivation layer no yɛ bere a oxidation-reduction reaction adeyɛ a chromium ne iron yɛ oxidized no. Sɛ passivation layer no sɛe a, passivation layer foforo bɛba ntɛmntɛm na electrochemical corrosion bɛba ntɛm ara, na deep spots of stainless steel bɛda adi. Nkyene ne ntini a ɛwɔ ntam a ɛyɛ mmerɛw. Passivation corrosion resistance no fa nnuru a ɛwɔ stainless steel mu a ɛwɔ mu, te sɛ chromium a ɛkorɔn, nickel ne molybdenum, ne nea ɛkeka ho no betumi ama ahoɔden a ɛwɔ passivation layer no mu no ayɛ kɛse, na ama corrosion resistance a ɛwɔ passivation layer no mu no ayɛ kɛse na fa di dwuma wɔ dade a ɛnyɛ den paipu no mu. Nsu a ɛwɔ mu no ne no wɔ abusuabɔ.

2. Dade a ɛnyɛ den paipu no ani nsɛe .

(1) Ɛnyɛ den sɛ ɛsɛe passivation layer a ɛwɔ stainless steel no ani no wɔ CI-containing medium no mu, efisɛ CI-oxidation tumi no yɛ kɛse. Sɛ passivation layer no wɔ dadeɛ no so nko ara a, printed layer no bɛkɔ so asɛe. Mpɛn pii no, passivation layer no sɛe wɔ mpɔtam hɔ beae bi a ɛwɔ dade no ani nkutoo. Nsunsuanso a efi nsɛe mu ba ne sɛ ɛbɛyɛ ntokuru nketenkete anaa amena. Wɔfrɛ amena nketewa a wɔkyekyɛ no kwa wɔ nneɛma no ani no sɛ amena a ɛyɛ mmerɛw. Pitting corrosion rate no kɔ soro bere a ɔhyew no kɔ soro na ɛkɔ soro bere a dodow kɔ soro no. Ano aduru ne sɛ wode ultra-low anaa low-carbon stainless steel (te sɛ 316L anaa 304L) bedi dwuma.

(2) Passive warp layer a ɛwɔ austenitic stainless steel no ani no yɛ mmerɛw sɛe bere a wɔreyɛ ne welding no. Sɛ ɔhyew ne ɔhyew ahoɔhare bere a wɔreyɛ ne welding no wɔ stainless steel sensitization temperature region (bɛyɛ 425-815°C) mu a, carbon a ɛyɛ supersaturated a ɛwɔ ade no mu no bedi kan ayɛ nsu wɔ aburow hye so na ɛne chromium ayɛ biako ma ayɛ chromium carbide na ayera chromium. Nea efi mu ba ne sɛ, chromium a ɛwɔ aburow hye no mu no so tew bere nyinaa bere a chromium carbide no kɔ so tɔ no, na ɛyɛ nea wɔfrɛ no chromium-depleted zone, a ɛma ahoɔden a ebetumi aba no yɛ mmerɛw na ɛtew corrosion resistance a ɛwɔ passivation layer no mu no so. Sɛ ɛne corrosive media te sɛ CI- wɔ medium no mu di nkitaho a, ɛbɛma micro-current corrosion aba. Ɛwom sɛ nsɛe no wɔ aburow no ani nkutoo de, nanso ɛhyɛn mu ntɛmntɛm ma ɛyɛ intergranular corrosion. Titiriw no, dade a ɛnyɛ den paipu no da adi kɛse wɔ welding ayaresa fã no mu.

(3) Adwennwene a ɛpaapae: Ɛyɛ nhyɛso a ɛnyɛ hwee ne nsɛe a wɔaka abom no na ɛde mpaapaemu ne dade a ɛyɛ mmerɛw ba. Mpɛn pii no, nneɛma a atwa yɛn ho ahyia a ɛma adwennwen no paapae no yɛ nea ɛyɛ den yiye. Ɛnyɛ tensile stress nko, na mmom saa adwennwen yi a wɔaka abom ne adwennwen a aka wɔ dade no mu esiane fabrication, welding, anaa ɔhyew a wɔde yɛ ade nti.

3. Nneɛma a wɔyɛ de yɛ sanitary welded stainless steel pipe .

uncoiling-deburring-forming-welding (gas ahobammɔ adaka)-mfinimfini leveling-welding seam grinding-pipe ahotew-hyerɛn annealing-nsiesie

Wɔkamfo kyerɛ sɛ wɔmfa precision stainless steel sanitary fluid pipe production line a ɛyɛ . Hangao Tech (seko mfiri) . Esiane sɛ wɔde dade a wɔde ayɛ no di dwuma tẽẽ de yɛ welding bere a wɔayɛ akyi nti, wobetumi adi nsu afiri no ho abodwokyɛre ne sɛnea ɛyɛ ellipticity no so yiye, na wobetumi ayi mfonini a ɛyɛ nwini no afi mu.

Nnwinnade atitiriw pii wɔ hɔ a wɔde yɛ:

(1) . Nneɛma a ɛwɔ mu a ɛwɔ mu : Wobetumi de ahyɛ rola no mu ne mandrel a wɔde ahyɛ mu no mu mpɛn pii akɔ anim ne akyi a ɛbɛma welding seam no sorokɔ a aka no ayɛ petee, sɛnea ɛbɛyɛ a welding seam ne base material no bɛyɛ nea ɛne ne ho hyia kɛse na ɛyɛ abɔde mu nsakrae, na ɛma inner tube wall no yɛ mmerɛw na ɛtew nsu afiri no nkae a ɛwɔ mu no so. Bere a wɔreyɛ mu polishing ne akyi polishing, ebetumi nso atew dodow ne ahoɔden a polishing na tew loss.

(2) Mframa a ɛbɔ ho ban a ɛbɔ ho ban fi fononoo a ɛyɛ hyew ho: ɛwɔ afã abien, fononoo a ɛyɛ hyew a ɛma nsu yɛ hyew ne nsu a ɛyɛ nwini a wɔde hyɛ nsu mu.

Furnace nipadua a ɛyɛ hyew a ɛyɛ hyew: Nneɛma titiriw no yɛ ɔfã a ɛyɛ kurukuruwa . Induction heating furnace , a ɛfa ɔhyew kwan a wɔfa so de induction heating coils di dwuma no, sɛnea ɛbɛyɛ a wobetumi de paipu fã no nyinaa ayɛ hyew wɔ akwan nyinaa so. Ɛnyɛ sɛ mframa a ɛbɔ ho ban no yɛ akwanside ma mframa nko, na mmom ɛyɛ mframa a ɛma onwini a ɛkyinkyini nso. Compact nhyehyɛe, ahobammɔ adwumayɛ, ahotoso control ne mmerɛw nsiesie. Wɔhwɛ ɔhyew mu nsonsonoe a ɛwɔ fononoo no mu no so wɔ ±1-2°C mu.

Wɔn a wɔyɛ nneɛma no betumi apaw sɛ wɔde ammonia mfiri a ɛporɔw bedi dwuma de ayɛ mframa a ɛbɔ ho ban anaasɛ wɔde mframa a wɔde ahyɛ ahina mu bedi dwuma tẽẽ sɛnea wɔn tebea te ankasa.