A cikin ASTM A213, ban da buƙatun ƙa'idodin taurin kai da tauri, ana kuma buƙatar gwaje-gwaje masu zuwa: Gwajin Lanƙwasa da Gwajin Lanƙwasa.
ASTM A335 P22(ASME SA335 P22) bututu ne mai ƙarfe mai ƙarfe mai kama da chromium-molybdenum wanda ba shi da matsala sosai, ana amfani da shi sosai a cikintukunyar ruwa, masu dumama ruwa, da zafimasu musayar kuɗi.
Ya ƙunshi 1.90%zuwa kashi 2.60% na chromium da kuma kashi 0.87% zuwa 1.13% na molybdenum, yana da kyakkyawan juriya ga zafi, kuma ya dace da lanƙwasawa, lanƙwasawa, ko ayyukan samar da makamancin haka.
Lambar UNS: K21590.
ASTM A335 shine daidaitaccen tsari na bututun ƙarfe mai kama da ferritic wanda ba shi da matsala wanda aka yi niyya don hidimar zafi mai zafi. Ana amfani da shi sosai a cikin boilers, superheaters, hot exchangers, da sauran aikace-aikace waɗanda ke aiki a ƙarƙashin yanayin zafi mai yawa da matsin lamba. Baya ga Grade P22, sauran matakan ƙarfe na gama gari sun haɗa daP5 (UNS K41545), P9 (UNS K90941), P11 (UNS K11597), kumaP91 (UNS P90901).
Mai ƙera da Yanayi
Za a yi bututun ƙarfe na ASTM A335 P22 ta hanyar tsari mara matsala kuma za a yi su da zafi ko kuma a yi musu fenti da sanyi tare da gyaran ƙarshe.
Bututun ƙarfe marasa sumulbututu ne marasa walda, wanda ke ba da bututun ƙarfe na P22 tare da kwanciyar hankali da aminci mafi girma a cikin yanayin zafi mai yawa da matsin lamba mai yawa.
Maganin Zafi
Za a sake dumama bututun ƙarfe na P22 kuma a yi masa magani da zafi ta hanyar ko dai cikakken annealing, isothermal annealing, ko kuma daidaita da kuma daidaita yanayin zafi.
| Matsayi | Nau'in maganin zafi | Ƙaramin Sauyawa ko Zafin Jiki |
| ASTM A335 P22 | cikakken ko isothermal annea | — |
| normalize da kuma daidaita yanayin | 1250 ℉ [675 ℃] minti |
Chromium (Cr) da molybdenum (Mo) sune muhimman abubuwan da ke haɗa ƙarfe na P22, suna inganta ƙarfin zafin jiki mai yawa, juriya ga iskar shaka, da kuma dorewa. An nuna takamaiman abubuwan da ke cikin sinadarai a ƙasa:
| Matsayi | Abun da aka haɗa, % | ||||||
| C | Mn | P | S | Si | Cr | Mo | |
| P22 | 0.05 ~ 0.15 | 0.30 ~ 0.60 | matsakaicin 0.025 | matsakaicin 0.025 | matsakaicin 0.50 | 1.90 ~ 2.60 | 0.87 ~ 1.13 |
Za a gudanar da gwaje-gwajen mallakar injina na P22 bisa ga buƙatun ASTM A999 masu dacewa.
Halayen Tashin Hankali
| Matsayi | ASTM A335 P22 | |
| Ƙarfin tauri, min | 60 ksi [415 MPa] | |
| Ƙarfin bayarwa, min | 30 ksi [205 MPa] | |
| Tsawaita a cikin inci 2 ko 50 mm (ko 4D), min | Tsawon lokaci | Mai wucewa |
| Mafi ƙarancin tsawaitawa na asali don kauri na bango 5/16 a cikin [8 mm] ko sama da haka, gwaje-gwajen tsiri, da kuma ga duk ƙananan girma dabam-dabam da aka gwada a cikakken sashe | Kashi 30% | kashi 20% |
| Lokacin da aka yi amfani da daidaitaccen tsawon ma'aunin zagaye na inci 2 ko mm 50 ko kuma ƙaramin samfurin girman da ya yi daidai da 4D (sau 4 diamita) | kashi 22% | 14% |
| Ga gwaje-gwajen tsiri, za a yi ragi ga kowane 1/32 a cikin [0.8 mm] raguwar kauri na bango ƙasa da inci 1/32 [8 mm] daga mafi ƙarancin tsawaitawa na maki masu zuwa. | 1.50% | 1.00% |
Taurin Halaye
Ma'aunin ASTM A335 bai ƙayyade takamaiman buƙatun tauri ga bututun ƙarfe na P22 ba.
Sauran Abubuwan Gwaji
Juriyar Diamita
Ga bututun da NPS [DN] ta tsara ko diamita na waje, bambance-bambancen diamita na waje ba zai wuce buƙatun da aka nuna a cikin teburin da ke ƙasa ba:
| Mai Zaɓen NPS [DN] | Bambancin da aka Yarda | |
| a cikin. | mm | |
| 1/8 zuwa 1 1/2 [6 zuwa 40], inci. | ±1/64 [0.015] | ±0.40 |
| Sama da inci 1 1/2 zuwa 4 [40 zuwa 100], inci. | ±1/32 [0.031] | ±0.79 |
| Sama da 4 zuwa 8 [100 zuwa 200], inci. | -1/32 - +1/16 [-0.031 - +0.062] | -0.79 - +1.59 |
| Sama da 8 zuwa 12 [200 zuwa 300], inci. | -1/32 - +3/32 [-0.031 - 0.093] | -0.79 - +2.38 |
| Sama da 12 [300] | ±1% na diamita na waje da aka ƙayyade | |
Don bututun da aka yi wa oda zuwa diamita na ciki, diamita na ciki bai kamata ya bambanta fiye da 1% daga diamita na ciki da aka ƙayyade ba.
Juriyar Kauri a Bango
Baya ga iyakancewar kauri na bango ga bututu wanda aka sanya ta hanyar iyakance nauyi a cikin ASTM A999, kauri na bango na bututu a kowane lokaci zai kasance cikin jurewar da aka ƙayyade a cikin teburin da ke ƙasa:
| Mai Zaɓen NPS [DN] | Haƙuri |
| 1/8 zuwa 2 1/2 [6 zuwa 65] ya haɗa da duk rabon t/D | -12.5% ~ +20.0% |
| Sama da 2 1/2 [65], t/D ≤ 5% | -12.5% ~ +22.5% |
| Sama da 2 1/2, t/D ＞ 5% | -12.5% ~ +15.0% |
| ASME | ASTM | EN | DIN | JIS |
| ASME SA335 P22 | ASTM A213 T22 | DIN 10216-2 10CrMo9-10 | DIN 17175 10CrMo9-10 | JIS G 3458 STPA25 |
Kayan aiki:bututun ƙarfe marasa tsari da kayan aiki na ASTM A335 P22;
Girman:1/8" zuwa 24", ko kuma an keɓance shi bisa ga buƙatunku;
Tsawon:Tsawon bazata ko yankewa bisa ga oda;
Marufi:Baƙin shafi, ƙarshen da aka yanke, kariyar ƙarshen bututu, akwatunan katako, da sauransu.
Tallafi:Takaddun shaida na IBR, duba TPI, MTC, yankewa, sarrafawa, da kuma keɓancewa;
Moq:mita 1;
Sharuɗɗan Biyan Kuɗi:T/T ko L/C;
Farashi:Tuntube mu don samun sabbin farashin bututun ƙarfe na T11;
