ASTM A350 LF1, LF2 NDI LF3 CARBON/ALLOY STEELS
MAKHALIDWE ACHIKHALIDWE
Mitundu iyi ya chitsulo imagwiritsidwa ntchito ngati zitsulo zamapaipi komanso popanga ma flange opangidwa ndi chitsulo. Ndi yoyenera kugwiritsidwa ntchito mpaka -20ºF (LF1,) -50ºF (LF2) ndi -150ºF (LF3.)
Kusankhidwa ndi Miyezo
Nambala ya mphasa. | KUCHOKERA | MU | AISI |
1.5622 | 14Ni6 | - | A350 |
KUSANTHULA KWA MANKHWALA
LF1:
C% | Mn% | Ndipo% | S% | P% | Cr% | Mu% |
0.30 payokha | 0.6/1.35 | .15/.30 | .040 max | .035 max | 0.30 payokha | 0.40 pasadakhale |
LF2:
C% | Mn% | Ndipo% | S% | P% | Cr% | Mu% |
0.30 payokha | 0.6/1.35 | .15/.30 | .040 max | .035 max | 0.30 payokha | 0.40 pasadakhale |
LF3:
C% | Mn% | Ndipo% | S% | P% | Cr% | Mu% |
0.20 payokha | 0.90 | .20/.35 | .040 max | .035 max | 0.30 payokha | 3.3/3.7 |
NTCHITO
Zitsulo zimenezi zimagwiritsidwa ntchito makamaka pa mapaipi ndi ma flange opangidwa.
KUPANGA
Magiredi a LF1 ndi LF2 ayenera kukhala opangidwa pa kutentha kwa pafupifupi 2250-2300ºF (1230-1260ºC) ndipo sizingatheke yopangidwa pansi pa 1650-1700ºF (900-925ºC.) The Gulu la LF3 lidzapangidwa pa kutentha kwa pafupifupi 2150-2200ºF (1175-1205ºC) ndipo sizingathekeyopangidwa pansi pa 1700ºF (925ºC.)
KUWOTCHULA/KUTENTHA KWA MATENDA
Kukonza kutentha kwa zitsulo za mapaipi mosakayikira kudzachitika mosalekeza pambuyo pokonza. Kapangidwe ka zitsulozi kadzatsimikiziridwa poyamba ndi njira yozungulira/yopangira. Paipi yokha idzaperekedwa kuchokera ku zitsulo zotenthedwa, ma flanges ndi zina zotero kuchokera ku zopangira. Njira yeniyeni yokonza kutentha idzakhala yofunika kwambiri pakuonetsetsa kuti payipiyo ndi yoyenera komanso yotetezeka komanso momwe ikuyendera pambuyo pake. Kukonza kutentha ndi kutentha pambuyo pokonza ndikofunikira.
Magiredi atatu omwe atchulidwa pano ndi osavuta kuwalumikiza ndi njira zonse zoyesedwa komanso zoyesedwa.
KUGWIRITSA NTCHITO NTCHITO
Pankhani ya zolumikizira zopangidwira ndi ma flange, magiredi awa chitsulokupangidwa ngati pakufunika kutero, ndipo chidziwitso chopitilira chidzatsimikizira ngati kukonza ndi bwino kuchita pa kapangidwe komangidwa kale, kapangidwe kabwinobwino kapena kapangidwe kolumikizidwa. Mulimonsemo, poganizira kufunika kwa kugwiritsa ntchito komaliza, upangiri uyenera kutengedwa kuchokera ku kampani yodziwika bwino yochiza kutentha..