Ihe nchara nchara na-enweghị ntụpọASTM A335 P91, enweghị nkebi ígwè ọkpọkọ eji ji esi mmiri ọkụ tubes, okpomọkụ Exchanger tubes na ndị ọzọ ọrụ, nwere ike iji dị ka ígwè ọkpọkọ maka elu okpomọkụ superheaters na reheaters na subcritical na supercritical boilers na mgbidi okpomọkụ ≤625 ° C, yana mgbidi High-okpomọkụ nkụ nkụnye eji isi mee. na uzuoku ọkpọkọ na okpomọkụ ≤600℃ nwekwara ike-eji dị ka nuklia ike okpomọkụ Exchangers na mmanụ ala cracking unit ọkụ tubes.
ASTM A335 P91 bụ igwe na-ekpo ọkụ na-ekpo ọkụ nke bụ ọla chromium-molybdenum dị ala. A na-eji ya na pipeline na akụrụngwa n'okpuru oke okpomọkụ na gburugburu nrụgide dị elu, dị ka petrochemical, ọkụ eletrik, ụlọ ọrụ nuklia na mpaghara ndị ọzọ. Akụkụ bụ isi nke ihe a bụ chromium, molybdenum, ọla kọpa, manganese, silicon, phosphorus, sọlfọ na ihe ndị ọzọ. Ọdịnaya nke chromium na molybdenum dị oke elu, nke nwere ike imeziwanye nguzogide okpomọkụ dị elu na nguzogide oxidation nke ihe.
ASTM A335 P91 ihe nwere ihe eji arụ ọrụ nke ọma ma ka nwere ike idowe ike na ike dị mma n'okpuru oke okpomọkụ na gburugburu nrụgide dị elu. Ihe ahụ na-eguzogidekwa oxidation, nke nwere ike ịgbatị ndụ ọrụ nke ọkpọkọ na akụrụngwa n'ụzọ dị irè. Na mgbakwunye, ihe ahụ nwekwara arụmọrụ ịgbado ọkụ dị mma, na-eme ka owuwu na ndozi dị mma.
N'ihi na ihe ASTM A335 P91 nwere ihe ndị a magburu onwe ya, a na-ejikarị ya eme ihe na ụfọdụ okpomọkụ dị elu na gburugburu nrụgide dị elu. Dịka ọmụmaatụ, n'ime ụlọ ọrụ petrochemical, ọkpọkọ na akụrụngwa nke ASTM A335 P91 nwere ike iguzogide mbibi kemịkalụ na corrosion n'okpuru oke okpomọkụ na nrụgide, na-ahụ maka ọrụ nchekwa nke akụrụngwa. N'ihe gbasara ọkụ eletrik na ụlọ ọrụ nuklia, ọkpọkọ na ngwá ọrụ nke ASTM A335 P91 nwere ike iguzogide corrosion na nkwụsị nke uzuoku na mmiri mmiri na mgbasa ozi ndị ọzọ n'okpuru nnukwu okpomọkụ na nrụgide, na-eme ka ọrụ ahụ dị mma.