1. Kupanga mapaipi a nayitrojeni kuyenera kutsatira zomwe zafotokozedwa
"Mafotokozedwe aukadaulo wamapaipi azitsulo zamafakitale ndi kuvomereza"
"Mapangidwe a oxygen station"
"Malamulo oyendetsera chitetezo ndi kuyang'anira mapaipi opanikizika"
"Mafotokozedwe a degreasing engineering ndi kuvomereza"
"Mafotokozedwe omanga ndi kuvomereza uinjiniya wowotcherera wa zida zam'munda ndi mapaipi amakampani"
2. Zofunikira za mapaipi ndi zowonjezera
2.1 Mapaipi onse, zopangira mapaipi, ndi mavavu ayenera kukhala ndi ziphaso zakale za fakitale.Apo ayi, yang'anani zinthu zomwe zikusowa ndipo zizindikiro zawo ziyenera kugwirizana ndi zomwe zilipo panopa dziko kapena unduna.
2. 2 Mapaipi onse ndi zowonjezera ziyenera kuyang'aniridwa ndi maso, monga ngati pali zolakwika monga ming'alu, mabowo ophwanyika, ma slag inclusions ndi zikopa zolemera kuti zitsimikizire kuti pamwamba ndi zosalala;chifukwa mavavu, mphamvu ndi zothina mayesero ayenera kuchitidwa mmodzimmodzi (kukanika mayeso ndi kuthamanga mwadzina 1.5 nthawi yogwira kuthamanga si osachepera mphindi 5);valavu yachitetezo iyenera kusinthidwa nthawi zambiri kuposa 3 malinga ndi malamulo opangira.
3. Kuwotcherera chitoliro
3.1 Kuwonjezera pa kukwaniritsa zofunikira za zojambulazo, zochitika zamakono zowotcherera ziyenera kuchitidwa motsatira malamulo apadziko lonse.
3.2 The welds ayenera anayendera ndi radiographic kapena akupanga malinga ndi kutchulidwa kuchuluka ndi khalidwe mlingo.
3.3 Mapaipi azitsulo a welded ayenera kuthandizidwa ndi argon arc.
4. Kuchotsa payipi ndi kuchotsa dzimbiri
Gwiritsani ntchito sandblasting ndi pickling kuchotsa dzimbiri ndikutsitsa khoma lamkati la payipi.
5. Kusamala kwa unsembe chitoliro
5.1 Pamene payipi ilumikizidwa, sayenera kufananizidwa mwamphamvu.
5.2 Onani kuwongoka kwa cholumikizira matako cha nozzle.Kuyeza doko pa mtunda wa 200mm.Kupatuka kovomerezeka ndi 1mm/m, kupatuka kwautali wonse ndi kochepera 10mm, ndipo kulumikizana pakati pa flanges kuyenera kukhala kofanana.
5.3.Gwiritsani ntchito zolumikizira za ulusi kuti mugwiritse ntchito PTFE ndikulongedza, ndipo ndizoletsedwa kugwiritsa ntchito mafuta a sesame.
5.4.Chitoliro ndi chithandizo ziyenera kulekanitsidwa ndi pepala lapulasitiki la ion chloride;chitoliro pakhoma chiyenera kukhala ndi manja, ndipo kutalika kwa manja sikuyenera kukhala kochepa kuposa makulidwe a khoma, ndipo kusiyana kwake kumayenera kudzazidwa ndi zinthu zosayaka.
5.5.Paipi ya nayitrogeni iyenera kukhala ndi chitetezo cha mphezi ndi zida zoyatsira ma electrostatic discharge.
5.6.Kuzama kwa mapaipi okwiriridwa siosachepera 0.7m (pamwamba pa payipi ndi pamwamba pa nthaka), ndipo payipi yokwiriridwa iyenera kuthandizidwa ndi anticorrosion.
6. Kuyesedwa kwa mapaipi ndi kuyeretsa
Pambuyo poyika payipi, yesani kuyesa mphamvu ndi kulimba, ndipo malamulowo ndi awa:
| Kupanikizika kwa ntchito | Mayeso a Mphamvu | Leak Test | ||
| MPa | ||||
| Media | Pressure (MPa) | Media | pressure (MPa) | |
| <0.1 | Mpweya | 0.1 | Air kapena N2 | 1 |
| ≤3 | mpweya | 1.15 | Air kapena N2 | 1 |
| madzi | 1.25 | |||
| ≤10 | madzi | 1.25 | Air kapena N2 | 1 |
| 15 | madzi | 1.15 | Air kapena N2 | 1 |
Zindikirani:
①Mpweya ndi nayitrogeni ziyenera kukhala zouma komanso zopanda mafuta;
②Madzi oyera opanda mafuta, chloride ion zomwe zili m'madzi sizidutsa 2.5g/m3;
③Mayeso onse amphamvu akuyenera kuchitidwa pang'onopang'ono pang'onopang'ono.Ikakwera mpaka 5%, iyenera kufufuzidwa.Ngati palibe kutayikira kapena zochitika zachilendo, kukakamiza kuyenera kuchulukitsidwa pang'onopang'ono pa 10%, ndipo kukhazikika kwamagetsi pagawo lililonse kuyenera kukhala kosachepera mphindi zitatu.Pambuyo pofika kupanikizika, iyenera kusungidwa kwa mphindi 5, ndipo imakhala yoyenerera pamene palibe deformation.
④ Kuyesa kolimba kutha kwa maola 24 mutatha kupanikizika, ndipo pafupifupi ola limodzi lotayirira mapaipi amkati ndi ngalande ayenera kukhala ≤0.5% monga oyenerera.
⑤Mukapambana mayeso olimba, gwiritsani ntchito mpweya wouma wopanda mafuta kapena nayitrogeni kuti muyeretse, ndikuyenda kosachepera 20m/s, mpaka pasakhale dzimbiri, kuwotcherera slag ndi zinyalala zina mupaipi.
7. Kupenta mapaipi ndi ntchito musanapange:
7.1.Dzimbiri, kuwotcherera slag, burr ndi zonyansa zina pamtunda wopaka utoto ziyenera kuchotsedwa musanapente.
7.2.Bwezerani ndi nayitrogeni musanayambe kupanga mpaka chiyero chitatha.
Nthawi yotumiza: Jun-25-2021