20 # seamless steel yeeb nkab feem ntau siv 20 # cov pa roj carbon zoo li cov khoom siv raw, uas yog cov pa roj carbon cua sov-resistant seamless steel yeeb nkab feem ntau siv hauv cov tsev thiab cov khoom siv tshuab.

20 # steel muaj cov yam ntxwv hauv qab no: zoo plasticity thiab muaj zog weldability. Vim nws lub zog tsis tshua muaj zog, nws yog qhov tsim nyog rau kev ua haujlwm txias thiab tsis muaj zog txaus.

20 # seamless steel yeeb nkab tuaj yeem siv rau hauv kev lag luam hauv qab no:

1. Rau cov kav dej uas tsis tshua muaj siab thiab nruab nrab, cov qauv siv yogwb 3087, siv los tsim cov raj superheater thiab cov phab ntsa dej txias ntawm nruab nrab thiab tsis tshua muaj siab boilers (ua haujlwm siab ≤5.9 MPa), uas nyob rau hauv qhov kub thiab txias (≤480 ℃) + dej vapor oxidation ib puag ncig ntev

2. Petroleum fracturing kav, tus qauv siv yogwb 9948, siv rau reactors, tshav kub exchangers, thiab lwm yam ntawm roj av refining units, hu rau acidic media (H₂S, CO₂) thiab siab siab (txog 15 MPa)

3. Cov cuab yeej siv hluav taws xob siab, cov txheej txheem kev siv yogwb 6479, siv rau kev kub siab (10 ~ 32 MPa) cov khoom siv chiv xws li hluavtaws ammonia thiab urea, hu rau cov xov xwm corrosive heev (xws li kua ammonia, urea yaj)

Kub dov seamless steel kav rau hydraulic kev txhawb nqa, tus qauv siv yogGB / T17396, siv rau kev txhawb nqa hydraulic thiab cov jacks hauv cov mines thee, thiab tiv taus qhov sib txawv ntawm cov khoom siv siab (50 ~ 100 MPa) thiab cuam tshuam kev co