T91kwayeI-P91ziintsimbi ezimbini ezisetyenziswa kakhulu ze-martensitic stainless steels ezinobushushu obuphezulu, ezinamandla aphezulu ezithathwe kwinkqubo ye-alloy ye-9Cr-1Mo-V. Zihlelwe ngokwahlukeneyo ngenxa yokwahluka kwemigangatho yokuvelisa kunye neefom zemveliso, kodwa zombini zidlala indima ebalulekileyo kumashishini wamandla kunye neekhemikhali. Apha ngezantsi kukho uhlalutyo oluneenkcukacha lokwahluka kwazo kunye nokusetyenziswa kwazo.

1. Umahluko oPhambili phakathi kwe-T91 kunye ne-P91

•Ifomu neMigangatho yeMveliso:

I-T91: Ihlelwe njenge-"Tube" okanye "Tubing" phantsi kwemigangatho ye-ASME (American Society of Mechanical Engineers). Ihlala isetyenziselwa iityhubhu zebhoyila, iityhubhu ze-superheater, kunye neetyhubhu ze-reheater.

I-P91: Ihlelwe njenge-"Pipe" phantsi kwemigangatho ye-ASME. Isetyenziswa kakhulu kwimigca ephambili yomphunga, iipayipi zoxinzelelo oluphezulu ezinobukhulu obukhulu, kunye neentloko.

•Iimfuno zoMveliso:

I-T91 ifuna ukuchaneka okuphezulu, umgangatho womphezulu, kunye nokusebenza kokugoba ukuze ilungele amalungiselelo etyhubhu yebhoyila antsonkothileyo.

I-P91 igxile kakhulu kumandla okuthwala uxinzelelo eludongeni oluqinileyo kunye nokukwazi ukuwelda, nto leyo eyenza ukuba ifaneleke kwiindawo ezinkulu zesakhiwo.

•Ugxininiso lweNtsebenzo:

Nangona zombini ezi alloys zabelana ngendlela efanayo yeekhemikhali, izakhiwo zazo ezincinci kunye neenkqubo zonyango lobushushu zahlukile kancinci. I-T91 ibeka phambili amandla okuqhekeka kobushushu obuphezulu kunye nokumelana nokugqwala kwegesi yolwelo, ngelixa i-P91 igxininisa ukuqina ngokubanzi kunye nokuzinza kwenkonzo yexesha elide.

2. IiNdawo zoSicelo

•Ishishini Lokuvelisa Umbane:

I-T91 isetyenziswa kakhulu kwiindawo ezinobushushu obuphezulu zeebhoyila zezityalo zamandla ezibaluleke kakhulu nezibaluleke kakhulu, ezifana neetyhubhu ze-superheater kunye ne-reheater, ezikwaziyo ukusebenza ixesha elide kumaqondo obushushu afikelela kwi-620.°C.

I-P91 isetyenziswa kwiipayipi eziphambili zomphunga, ii-headers, kunye neevalvu zoxinzelelo oluphezulu ezishushu kakhulu, zibonelela ngomthamo obalaseleyo wokuthwala uxinzelelo kwiinkqubo zothumelo ezibalulekileyo kwizityalo zamandla.

•Ishishini lePetrochemical:

Zombini ezi alloys zisetyenziswa kwi reactors ezisebenzisa uxinzelelo oluphezulu, ii-heat exchangers, kunye neeyunithi zokuqhekeka, ezibonisa ukumelana neemeko ezirhabaxa ezifana ne-hydrogen sulfide.

•Amanye amacandelo oShishino:

Ezi ziquka iinkqubo ezincedisayo kwizikhululo zamandla enyukliya kunye nezixhobo zonyango lobushushu obuphezulu ezifuna ukumelana nobushushu kunye noxinzelelo.

3. Izinto ekufuneka ziqwalaselwe xa ukhetha

Ukukhetha phakathi kwe-T91 kunye ne-P91 kuxhomekeke kwiimeko ezithile zokusebenza: I-T91 ikhethwa kakhulu kwiipayipi ezincinci, ezinodonga oluncinci ezifuna ukugotywa, ngelixa i-P91 ifanelekile ngakumbi kwiipayipi ezinkulu, ezinodonga oluqinileyo okanye izinto zokwakha. Zombini ii-alloys zifuna ulawulo oluqinileyo kwiinkqubo zokuwelda kunye nonyango lobushushu ukuze ziphucule iingenelo zazo zokusebenza kubushushu obuphezulu.