GB/T5310-2017 tube e se nang seam bakeng sa boiler ea khatello e phahameng
Kopo
Haholo-holo e sebelisoa bakeng sa tšebeletso ea khatello e phahameng le mocheso o phahameng oa boiler (Superheater tube, reheater tube, air guide tube, main steam tube for high and Ultra high pressure boilers). Tlas'a ketso ea mocheso o phahameng oa mocheso oa mocheso le mouoane oa metsi, tube e tla oxidize le ho senya. Ho hlokahala hore phala ea tšepe e be le nako e telele ea nako e telele, e hanyetsanang haholo le oxidation le corrosion, le botsitso bo botle ba sebopeho.
Kereiti e ka Sehloohong
Kereiti ea boleng bo phahameng ba tšepe ea sebopeho sa carbon: 20g, 20mng, 25mng
Kereiti ea tšepe ea sebopeho sa motsoako: 15mog, 20mog, 12crmog, 15crmog, 12cr2mog, 12crmovg, 12cr3movsitib, joalo-joalo.
Maemong a fapaneng ho na le Kereiti e fapaneng
GB5310 : 20G = EN10216 P235GH
| Lintho tse bonahalang | C | Si | Mn | P | S | Cr | MO | NI | Al | Cu | Ti | V |
| P235GH | ≤0.16 | ≤0.35 | ≤1.20 | ≤0.025 | ≤0.025 | ≤0.3 | ≤0.08 | ≤0.3 | ≤0.02 | ≤0.3 | ≤0.04 | ≤0.02 |
| 20G | 0.17-0.24 | 0.17-0.37 | 0.35-0,65 | ≤0.03 | ≤0.03 | - | - | - | - | - | - | - |
| Lintho tse bonahalang | Matla a tšepe | Khefutsa | Katoloso |
| 20G | 410-550 | ≥245 | ≥24 |
| P235GH | 320-440 | 215-235 | 27 |
| 360-500 | 25 |
| Lintho tse bonahalang | Teko | ||||||
| 20G: | Ho batalatsa | Hydraulic | Teko ea Tšusumetso | NDT | Eddy | Boholo ba Grazin | Sebopeho sa microscopic |
| P235GH | Ho batalatsa | Hydraulic | Teko ea Tšusumetso | NDT | Motlakase | Ho atoloha hoa metsi | Leak tightness |
Mamello
Botenya ba Lebota le Bophara ba Kantle:
Haeba ho se na litlhoko tse khethehileng, phaephe e tla tsamaisoa e le bophara bo tloaelehileng ba kantle le botenya ba lebota bo tloaelehileng. Joalo ka leqephe la ho latela
| Tlhaloso ea lihlopha | Mokhoa oa ho etsa | Boholo ba phala | Mamello | |||
| Sekolo se tloaelehileng | Kereiti e phahameng | |||||
| WH | Peipi e kentsoeng e chesang (extrude) | Norminal outer Diameter (D) | <57 | Setšoantšo sa 0.40 | ±0,30 | |
| 57 〜325 | SW35 | ±0.75%D | ±0.5%D | |||
| S>35 | ±1%D | ±0.75%D | ||||
| >325 le 6. | + 1%D kapa + 5.Nka e nyenyane 一2 | |||||
| > 600 | + 1%D kapa + 7,Nka e nyenyane 一2 | |||||
| Tloaelehileng Lebota Botenya （S) | <4.0 | ±|・丨） | ±0.35 | |||
| >4.0-20 | + 12,5%S | ±10%S | ||||
| >20 | DV219 | ±10%S | ±7.5%S | |||
| 心219 | + 12,5%S -10%S | 土10%S | ||||
| WH | Pipe ea ho atolosa mocheso | Norminal outer Diameter (D) | kaofela | ±1%D | ± 0.75%. |
| Tloaelehileng Lebota Botenya (S) | kaofela | + 20%S -10%S | + 15%S -io%s | ||
| WC | E batang (e phuthoa) Ppipe | Norminal outer Diameter (D) | <25.4 | ±L1j | - |
| >25.4 〜4() | ±0.20 | ||||
| > 40 〜50 | |:0.25 | - | |||
| > 50 〜60 | ±0.30 | ||||
| > 60 | ±0.5%D | ||||
| Tloaelehileng Lebota Botenya (S) | <3.0 | ±0.3 | ±0.2 | ||
| >3.0 | S | ±7.5%S |
Bolelele:
Bolelele bo tloaelehileng ba lipeipi tsa tšepe ke 4 000 mm ~ 12 000 mm. Ka mor'a ho buisana pakeng tsa mofani oa thepa le moreki, 'me u tlatse konteraka, e ka tsamaisoa liphaephe tsa tšepe tse nang le bolelele bo fetang 12 000 mm kapa bokhutšoane ho feta I 000 mm empa e se khutšoanyane ho feta 3 000 mm; bolelele bo bokhuts'oanyane Palo ea lipeipi tsa tšepe tse ka tlase ho 4,000 mm empa e seng ka tlase ho 3,000 mm ha e na ho feta 5% ea palo eohle ea lipeipi tsa tšepe tse fanoeng.
Boima ba thomello:
Ha phala ea tšepe e fanoa ho ea ka bophara bo ka ntle ba lebitso le botenya ba lebota la lebitso kapa bophara bo ka hare bo ka hare le botenya ba lerako, phala ea tšepe e fanoa ho latela boima ba 'nete. E ka boela ea fanoa ho ea ka boima ba theory.
Ha phala ea tšepe e fanoa ho ea ka bophara bo ka ntle ba lebitso le bonyane botenya ba lerako, phala ea tšepe e fanoa ho latela boima ba 'nete; mekhatlo ea phepelo le tlhokahalo e buisana. 'Me e bontšitsoe konteraka. Pipe ea tšepe e ka boela ea fanoa ho ea ka boima ba theory.
Boima ba 'mele:
Ho ea ka litlhoko tsa moreki, ka mor'a ho buisana pakeng tsa mofani oa thepa le moreki, 'me tumellanong, ho kheloha pakeng tsa boima ba' mele le boima ba khopolo ea pipe ea tšepe ea pelehi ho tla finyella litlhoko tse latelang:
a) Pipe ea tšepe e le 'ngoe: ± 10%;
b) Sehlopha se seng le se seng sa liphaephe tsa tšepe tse nang le bonyane ba boholo ba 10 t: ± 7.5%.
Tlhokahalo ea Teko
Teko ea Hydraustatic:
Pipe ea tšepe e lokela ho lekoa ka hydraulically ka bonngoe. Khatello e phahameng ea teko ke 20 MPa. Tlas'a khatello ea teko, nako ea botsitso ha ea lokela ho ba ka tlase ho 10 s, 'me pipe ea tšepe ha ea lokela ho tsoa.
Kamora hore mosebelisi a lumele, tlhahlobo ea hydraulic e ka nkeloa sebaka ke tlhahlobo ea eddy ea hajoale kapa tlhahlobo ea ho lutla ha magnetic flux.
Teko e sa Senyeheng:
Liphaephe tse hlokang tlhahlobo e eketsehileng li lokela ho hlahlojoa ka ultrasonically ka bonngoe. Ka mor'a hore puisano e hloke tumello ea mokga mme e hlalositsoe konteraka, liteko tse ling tse sa senyeheng li ka eketsoa.
Teko ea ho batalatsa:
Li-tubes tse nang le bophara ba ka ntle ho feta 22 mm li tla etsoa teko ea ho batalla. Ha ho na delamination e bonahalang, matheba a masoeu, kapa litšila tse lokelang ho etsahala nakong ea teko eohle.
Flaring Test:
Ho ea ka litlhoko tsa moreki le tse boletsoeng ka konteraka, phala ea tšepe e nang le bophara bo ka ntle ≤76mm le botenya ba lerako ≤8mm e ka etsoa tlhahlobo ea mollo . Teko e ne e etsoa ka mocheso oa kamore ka taper ea 60 °. Kamora ho phatloha, sekhahla sa ho phatloha ha bophara ba ka ntle se lokela ho fihlela litlhoko tsa tafole e latelang, 'me lisebelisoa tsa tlhahlobo ha lia lokela ho bonts'a mapheo kapa mapheo.
| Mofuta oa tšepe
| Sekhahla sa ho phatloha ka ntle sa phala ea tšepe /% | ||
| Diameter ka hare / Kantle Diameter | |||
| <0.6 | >0.6 〜0.8 | >0.8 | |
| Litšepe tsa boleng bo phahameng ba carbon structural | 10 | 12 | 17 |
| Mohaho alloy tšepe | 8 | 10 | 15 |
| • Bophara bo ka hare bo baloa bakeng sa sampuli. | |||
