A335 seamless chromium-molybdenum yeeb nkabyog ib hom seamless alloy steel yeeb nkab rau kub kub. Vim nws qhov zoo oxidation tsis kam, kub siab zog thiab sulfide corrosion kuj, nws yog dav siv nyob rau hauv kub kub, siab siab, flammable thiab explosive roj av refining khoom. Cov kav dej, tshwj xeeb tshaj yog cov kav dej ncaj qha ntawm lub qhov cub cua sov, tuaj yeem ncav cuag qhov kub nruab nrab ntawm 550 ~ 600 degree.
A335 seamless chromium-molybdenum yeeb nkab yog tsim raws li American ASTM A335 tus qauv. Nws cov ntaub ntawv feem ntau suav nrog P5, P9, P11, P22, P91, thiab lwm yam. Cov qib zoo sib xws hauv tsev steel yog 1Cr9Mo, 15CrMo, 12Cr1MoV, 12Cr2Mo, thiab lwm yam, uas sib haum rau P9, P11, P22, P91 thiab lwm yam ntaub ntawv ntawm A335. .
| Specification | ASTM A335 Cov Lus Qhia Tshwj Xeeb |
|---|---|
| Khoom Qib | P5, P9, P11, P22, P91, thiab lwm yam. |
| Cov khoom siv hauv tsev sib npaug | 1Cr9Mo, 15CrMo, 12Cr1MoV, 12Cr2Mo, thiab lwm yam. |
| Daim ntawv thov | Boiler, Superheater, Reheater, Dej Phab Ntsa Header, Economizer, Low-Temperature Superheater thiab Reheater, Condenser Tubes, thiab lwm yam. |
| Ntsiab nta | Zoo creep kuj, siab tensile zog, oxidation kuj, corrosion kuj |
| Cov txheej txheem tsim khoom | Hlau ua, dov, kho cua sov, tsis muaj kev puas tsuaj, thiab lwm yam. |
| Quality Assurance | Kev soj ntsuam nruj thiab kuaj xyuas kom ua tau raws li cov qauv thiab cov kev qhia tshwj xeeb |
ASTM A335 Chrome Moly pipes Permissible Variations in Outside Diameter
| NPS [DN] Tus tsim | Tshaj | Hauv qab | ||
| hauv. | mm | hauv. | mm | |
| 1/8 rau 1 1/2 [6 rau 40], incl. | 1/64 (0.015) | 0.40 | 1/64 (0.015) | 0.40 |
| Tshaj 1 1/2 txog 4 [40 txog 100], incl. | 1/32 (0.031) | 0.79 | 1/32 (0.031) | 0.79 |
| Tshaj 4 txog 8 [100 txog 200], incl. | 1/16 (0.062) | 1.59 | 1/32 (0.031) | 0.79 |
| Tshaj 8 txog 12 [200 txog 300], incl. | 3/32 (0.093) | 2.38 | 1/32 (0.031) | 0.79 |
| Ntau tshaj 12 [300] | +/- 1% ntawm qhov teev sab nraud | |||
