1. Kuvakwa kwepombi yeNitrogen kunofanira kutevera zvakatemwa
"Specification yeindasitiri simbi pombi engineering uye kugamuchirwa"
"Oxygen station design tsanangudzo"
"Mitemo pamusoro pekuchengetedza kuchengetedza uye kutarisa kwemapaipi ekumanikidza"
"Specification ye degreasing engineering uye kugamuchirwa"
"Kutsanangurwa kwekuvaka uye kugamuchirwa kwewelding engineering yemidziyo yemumunda uye mapaipi emaindasitiri"
2. Pipeline uye accessories zvinodiwa
2.1 Mapombi ese, mapombi ekuisa, uye mavharuvhu anofanirwa kunge aine zvitupa zvekare zvefekitari.Zvikasadaro, tarisa zvinhu zvisipo uye zviratidzo zvazvo zvinofanirwa kusangana nemamiriro azvino enyika kana gurukota.
2. 2 Mapaipi ese uye zvishongedzo zvinofanirwa kutariswa nemaziso, sekunge pane kukanganisa kwakadai sekutsemuka, shrinkage maburi, slag inclusions uye inorema dehwe kuti ive nechokwadi chekuti kumusoro kwakachena uye kwakachena;kune mavharuvhu, simba uye kusimba bvunzo kunofanirwa kuitwa imwe neimwe (yeyedzo yekumanikidza ndeyezita rekumanikidza 1.5 Iyo yekumanikidza kubata nguva haisi pasi pe5 maminetsi);chivharo chekuchengetedza chinofanira kuderedzwa kanopfuura ka3 maererano nemitemo yekugadzira.
3. Welding yepombi
3.1 Pamusoro pekusangana nezvinodiwa zvekudhirowa, iwo welding tekinoroji mamiriro anofanirwa kuitwa zvinoenderana nemirairo yenyika.
3.2 Mawelds anofanirwa kuongororwa neradiographic kana ultrasonic zvichienderana nehuwandu hwakatarwa nehuwandu hwemhando.
3.3 Welded carbon steel pombi dzinofanira kutsigirwa ne argon arc.
4. Pipeline degreasing uye kubvisa ngura
Shandisa jecha uye pickling kubvisa ngura uye kuderedza mukati memadziro epombi.
5. Kuchengetedza kwekuisa pombi
5.1 Kana pombi yabatanidzwa, haifanirwe kusungirirwa zvine simba.
5.2 Tarisa kutwasuka kwebutt connector yemuromo.Kuyera chiteshi chiri chinhambwe che200mm.Kutsauka kunobvumirwa ndeye 1mm / m, kureba kwese kureba kuri pasi pe10mm, uye kuwirirana pakati pemaflange kunofanira kufanana.
5.3.Shandisa ma threaded connectors kuisa PTFE nekurongedza, uye zvinorambidzwa kushandisa sesame mafuta.
5.4.Iyo pombi uye chitsigiro chinofanira kuparadzaniswa ne-non-chloride ion plastiki sheet;iyo pombi kuburikidza nemadziro inofanira kuva nemaoko, uye kureba kwesleeve hakufaniri kuva pasi pemadziro emadziro, uye gomba rinofanira kuzadzwa nezvinhu zvisingabatiki.
5.5.Iyo pombi yenitrogen inofanirwa kuve nekudzivirira mheni uye electrostatic discharge grounding zvishandiso.
5.6.Kudzika kwepombi yakavigwa hakusi pasi pe 0.7m (kumusoro kwepombi iri pamusoro pevhu), uye pombi yakavigwa inofanira kurapwa ne anticorrosion.
6. Pipeline pressure test uye kuchenesa
Mushure mekunge pombi yaiswa, ita bvunzo yesimba uye kusimba, uye mirau yacho ndeiyi inotevera:
| Kumanikidza kushanda | Muedzo Wesimba | Leak Test | ||
| MPa | ||||
| Media | Pressure (MPa) | Media | pressure (MPa) | |
| <0.1 | Air | 0.1 | Mhepo kana N2 | 1 |
| ≤3 | mhepo | 1.15 | Mhepo kana N2 | 1 |
| mvura | 1.25 | |||
| ≤10 | mvura | 1.25 | Mhepo kana N2 | 1 |
| 15 | mvura | 1.15 | Mhepo kana N2 | 1 |
Cherechedza:
① Mhepo uye nitrogen inofanira kunge yakaoma uye isina mafuta;
②Mvura isina mafuta yakachena, iyo chloride ion yemukati yemvura haipfuure 2.5g/m3;
③Ese kusimba kwekumanikidza bvunzo kunofanirwa kuitwa zvishoma nezvishoma nhanho nhanho.Kana ichikwira kusvika ku5%, inofanira kuongororwa.Kana pasina kuvuza kana chiitiko chisina kujairika, kudzvanywa kunofanirwa kuwedzerwa nhanho nhanho pa10% kudzvanywa, uye kudzikamisa kwemagetsi kwedanho rega rega hakufanirwe kunge kuri pasi pemaminetsi matatu.Mushure mokusvika pakumanikidzwa, inofanira kuchengetwa kwemaminitsi mashanu, uye inokodzera kana pasina deformation.
④ Muedzo wekusimba uchagara kwemaawa makumi maviri nemana mushure mekusvika pakudzvanywa, uye avhareji yeawa yekudonha kweawa yemapaipi emukati uye emugero anofanira kunge ari ≤0.5% seanokwanisa.
⑤Mushure mekupfuura muyedzo wekusimba, shandisa mhepo yakaoma isina mafuta kana nitrogen kuchenesa, nekuyerera kusingasviki 20m/s, kusvika pasisina ngura, welding slag uye mamwe madota mupombi.
7. Pipeline kupenda uye kushanda isati yagadzirwa:
7.1.Iyo ngura, welding slag, burr uye kumwe kusvibiswa pane pendi pendi inofanira kubviswa pamberi pekupenda.
7.2.Dzorera nenitrogen usati waisa mukugadzirwa kusvikira kuchena kwave kwakakodzera.
Nguva yekutumira: Jun-25-2021