ASTM A335 P12 (ASME SA335 P12) waa tuubbo bir ah oo aan kala go 'lahayn oo loogu talagalay adeegga heerkulka sare.
Walxaha ugu muhiimsan ee P12 ee isku-darka ah waa 0.08–1.25% chromium iyo 0.44–0.65% molybdenum, taasoo u kala saarta birta isku-darka ah ee Cr-Mo.
Maaddadani waxay bixisaa xoog heer-kul sare oo heer sare ah, iska caabin kulaylka, iyo iska caabin oksaydh, waxaana si caadi ah loogu isticmaalaa kuleyliyeyaasha, kuleyliyeyaasha sare, beddelayaasha kulaylka, iyo tuubooyinka xididdada cadaadiska.
Tuubooyinka P12 waxaa sidoo kale si caadi ah loogu isticmaalaa foorarsiga, flanging (vanstoneing), iyo hawlgallada sameynta ee la midka ah, iyo sidoo kale alxanka isku-dhafka.
Marka la sameynayo tijaabada halabuurka kiimikada ee P12, waa in loo sameeyaa si waafaqsan ASTM A999. Shuruudaha halabuurka kiimikada waa sidan soo socota:
| Fasal | Halabuurka, % | ||||||
| C | Mn | P | S | Si | Cr | Mo | |
| P12 | 0.05 - 0.15 | 0.30 - 0.61 | ugu badnaan 0.025 | ugu badnaan 0.025 | 0.50 ugu badnaan | 0.08 - 1.25 | 0.44 - 0.65 |
Chromium si weyn ayuu u xoojiyaa iska caabbinta heerkulka sare ee tuubooyinka birta ah wuxuuna hagaajiyaa xasilloonidooda inta lagu jiro adeegga heerkulka sare ee muddada dheer. Molybdenum wuxuu kordhiyaa xoogga heerkulka sare iyo iska caabbinta gurguurta.
| Fasal | ASTM A335 P12 | |
| Xoogga jiidista, ugu yaraan, ksi [MPa] | 60 [415] | |
| Xoogga wax soo saarka, ugu yaraan, ksi [MPa] | 32 [220] | |
| Kordhinta 2 inji ama 50 mm (ama 4D), ugu yaraan, % | Longitudinal | Kala-goysyada |
| Dheeraynta ugu yar ee aasaasiga ah ee darbiga 5/16 gudaha [8 mm] iyo wixii ka weyn dhumucdiisa, tijaabooyinka xariijimaha, iyo dhammaan cabbirrada yaryar ee lagu tijaabiyay qaybta oo dhan | 30 | 20 |
| Marka la isticmaalo dhererka cabbirka wareega 2 inji ama 50 mm ama muunad cabbirkeedu ka yar yahay saamiga oo leh dhererka cabbirka oo la mid ah 4D (4 jeer dhexroorka) | 22 | 14 |
| Tijaabooyinka xarigga ah, dhimis kasta oo ah 1/32 inji [0.8 mm] oo ah dhumucda derbiga oo ka hooseysa 5/16 inji [8 mm] laga bilaabo dhererka ugu yar ee aasaasiga ah ee dhibcaha boqolleyda soo socda waa in la sameeyaa | 1.50 | 1.00 |
Soo-saaraha iyo Xaaladda
Tuubooyinka birta ah ee ASTM A335 P12 waa in laga sameeyaageeddi-socod aan kala go 'lahaynwaana in lagu sameeyaa qaab kulul ama mid qabow, sida ku cad.
Daaweynta Kulaylka
Dhammaan tuubooyinka P12 waa in dib loo kululeeyaa si loogu daweeyo kulaylka loona daweeyo kulaylka si waafaqsan shuruudaha jadwalka.
| Fasal | Nooca Daaweynta Kulaylka | Heerkulka Qaboojinta Hoosaadka ah ama Heerkulka Qaboojinta |
| ASTM A335 P12 | annaalka buuxa ama isothermal-ka ah | — |
| caadi u noqo oo dabeecad samee | 1200 ℉ [650 ℃] | |
| sannad-guuro aan caadi ahayn | 1200 ~ 1300 ℉ [650 ~ 705 ℃] |
Dherer kasta oo tuubo ah oo dhexroorkeedu ka badan yahay 10 inji [250 mm] iyo dhumucda derbiga oo ka yar ama la mid ah 0.75 inji [19 mm] waa in lagu sameeyaa tijaabo hydrostatic ah.
Haddii kale, tijaabin aan wax burburin ah lahayn oo waafaqsan ASTM E213, E309, iyo E570 ayaa la isticmaali karaa.
Iyadoo aan loo eegin habka tijaabada ee la doortay, waa in lagu muujiyaa calaamadaynta tuubada, iyadoo shuruudaha calaamadaynta ay yihiin sidan soo socota:
| Ultrasonic-ka | Daadinta Daadashada | Eddy Current | Hydrostatic | Calaamadaynta |
| No | No | No | Haa | Cadaadis Tijaabo ah |
| Haa | No | No | No | UT |
| No | Haa | No | No | FL |
| No | No | Haa | No | EC |
| Haa | Haa | No | No | UT / FL |
| Haa | No | Haa | No | UT / EC |
| No | No | No | No | NH |
| Haa | No | No | Haa | Cadaadis UT / Tijaabo |
| No | Haa | No | Haa | Cadaadis Tijaabo ah oo FL / ah |
| No | No | Haa | Haa | Cadaadis EC / Tijaabo |
Dulqaadka Cabbirka
Tuubooyinka loo dalbaday NPS [DN] amadhexroorka dibadda, kala duwanaanshaha dhexroorka dibadda waa inaysan dhaafin kuwa lagu qeexay jadwalka afuufidda.
| NPS [DN] Naqshadeeye | Kala Duwanaanta La Ogol Yahay | |
| gudaha. | mm | |
| 1/8 ilaa 1 1/2 [6 ilaa 40], inji. | ±1/64 [0.015] | ±0.40 |
| In ka badan 1 1/2 ilaa 4 [40 ilaa 100], inji. | ±1/32 [0.031] | ±0.79 |
| In ka badan 4 ilaa 8 [100 ilaa 200], inji. | -1/32 - +1/16 [-0.031 - +0.062] | -0.79 - +1.59 |
| In ka badan 8 ilaa 12 [200 ilaa 300], inji. | -1/32 - +3/32 [-0.031 - 0.093] | -0.79 - +2.38 |
| In ka badan 12 [300] | ±1% dhexroorka dibadda ee la cayimay | |
Tuubooyinka loo dalbadaydhexroorka gudaha, dhexroorka gudaha waa inaanu ka badnayn ±1% marka loo eego dhexroorka gudaha ee la cayimay.
Dulqaadka Dhumucda Darbiga
Marka laga soo tago xaddidaadda aan tooska ahayn ee dhumucda derbiga ee tuubooyinka oo lagu soo rogay xaddidaadda miisaanka ee ASTM A999, dhumucda derbiga ee tuubooyinka marka la eego waa inay ku jirtaa dulqaadka miiska afuufaya.
| NPS [DN] Naqshadeeye | Dulqaad, % foomka la cayimay |
| 1/8 ilaa 2 1/2 [6 ilaa 65] oo ay ku jiraan dhammaan saamiyada t/D | -12.5 - +20.0 |
| Ka sarreeya 2 1/2 [65], t/D ≤ 5% | -12.5 - +22.5 |
| Ka sarreeya 2 1/2, t/D ＞ 5% | -12.5 - +15.0 |
t = Dhumucda Darbiga ee la cayimay; D = Dhexroorka Dibadda ee la cayimay.
| ASME | ASTM | EN | GB | JIS |
| ASME SA335 P12 | ASTM A213 T12 | EN 10216-2 13CrMo4-5 | GB/T 5310 15CrMoG | JIS G 3462 STBA22 |
Qalabka:Tuubooyinka iyo qalabka birta ah ee aan kala go 'lahayn ee ASTM A335 P12;
Cabbirka:1/8" ilaa 24", ama loo habeeyey iyadoo loo eegayo shuruudahaaga;
Dhererka:Dherer aan kala sooc lahayn ama la jaray si loo dalbado;
Baakadaha:Dahaadh madow, darafyo godan, ilaaliyayaal dhammaadka tuubooyinka, sanduuqyo alwaax ah, iwm.
Taageerada:Shahaadada IBR, kormeerka TPI, MTC, jarista, farsamaynta, iyo habaynta;
MOQ:1 m;
Shuruudaha Lacag-bixinta:T/T ama L/C;
Qiimaha:Nala soo xiriir si aad u hesho qiimaha ugu dambeeyay ee tuubooyinka birta ah ee P12.
