Yintoni i-NACE MR0175?

I-NACE MR0175, eyaziwa ngokuba yi "Standard Material Requirements for Resistance to Sulfide Stress Cracking in Corrosive Petroleum Refining Environments," ngumgangatho ophuhliswe nguMbutho weSizwe weeNjineli zeCorrosion (NACE) ukujongana nomba we-sulfide stress cracking kwioli kunye ishishini legesi. Lo mgangatho ubonelela ngezikhokelo zokhetho kunye nesiqinisekiso semathiriyeli esetyenziswa kwisixhobo kunye namacandelo aya kubonakaliswa kwindawo enobungozi kwimisebenzi yokucoca i-petroleum.

I-Sulfide stress cracking (SSC) luhlobo lwe-hydrogen-induced cracking eyenzeka kwintsimbi kunye nezinye i-alloys xa zibonakaliswe kwi-hydrogen sulfide (H2S) kunye noxinzelelo. Olu hlobo lokuqhekeka lunokukhokelela ekungaphumeleli kwentlekele kwezixhobo kwaye lubeke ukhuseleko olunzima kunye nemingcipheko yokusingqongileyo kwimisebenzi yokucoca i-petroleum. I-NACE MR0175 yaphuhliswa ukunciphisa umngcipheko we-SSC ngokubonelela ngeemfuno zokukhethwa kunye nesiqinisekiso sezinto eziphathekayo ezichasene ne-sulfide stress cracking.

Umgangatho ugubungela uluhlu olubanzi lwezixhobo, kubandakanywa i-carbon kunye ne-low-alloy steels, i-stainless steels, i-alloys ye-nickel, kunye nezinye i-alloys-resistant corrosion. Inika izikhokelo zokukhethwa kwezinto, ukunyangwa kobushushu, imida yobunzima, kunye neemfuno zokuvavanya ukuqinisekisa ukuba izinto ezisetyenziselwa ukucocwa kwepetroleum zixhathisa ukuqhekeka koxinzelelo lwe-sulfide.

Enye yeenkalo eziphambili ze-NACE MR0175 yisiqinisekiso sezinto eziphathekayo ngokuvavanya kunye namaxwebhu. Umgangatho uchaza iimfuno ezithile zovavanyo, ezifana novavanyo lobulukhuni, uvavanyo lwe-tensile, kunye novavanyo lwe-sulfide yoxinzelelo lwe-stress, ukubonisa ukuxhathisa kwezixhobo zokuqhekeka koxinzelelo lwe-sulfide. Ukongeza, umgangatho ufuna abavelisi babonelele ngamaxwebhu, anje ngeengxelo zovavanyo lwemathiriyeli kunye nezatifikethi zokuthotyelwa, ukuqinisekisa ukuba izixhobo ziyahlangabezana neemfuno ze-NACE MR0175.

I-NACE MR0175 ikwabonelela ngezikhokelo zoyilo kunye nokwenziwa kwezixhobo kunye namacandelo okunciphisa umngcipheko wokuqhekeka koxinzelelo lwe-sulfide. Oku kubandakanya iingcebiso zeenkqubo ze-welding, unyango lwe-surface, kunye namanye amanyathelo okuthintela ukuqhekeka kwe-hydrogen-induced kwintsimi.

Ukuthotyelwa kwe-NACE MR0175 kubalulekile ekuqinisekiseni ukuthembeka kunye nokuthembeka kwezixhobo kunye namacandelo kwimisebenzi yokucoca i-petroleum. Ngokukhetha kunye nezinto ezifanelekileyo ngokuhambelana nomgangatho, abaqhubi banokunciphisa umngcipheko we-sulfide stress cracking kunye nokuqinisekisa ukhuseleko kunye nokusebenza kakuhle kwezibonelelo zabo.

Ukuqukumbela, i-NACE MR0175 ngumgangatho obalulekileyo kwishishini leoli kunye negesi, ukubonelela ngezikhokelo zokukhethwa kunye nesiqinisekiso sezinto eziphathekayo ezichasene noxinzelelo lwe-sulfide yokuqhekeka kwiindawo ezihlambulukileyo zokucoca i-petroleum. Ngokulandela iimfuno zalo mgangatho, abaqhubi banokunciphisa umngcipheko wokuqhekeka kwe-sulfide kunye nokuqinisekisa ukuthembeka kunye nokuthembeka kwezixhobo zabo kunye namacandelo. Ukuthotyelwa kwe-NACE MR0175 kubalulekile ekugcineni ukhuseleko kunye nokusebenza kakuhle kwemisebenzi yokucoca i-petroleum.

I-Hikelok inokubonelela ngeemveliso ezahlukeneyo ezithobela umgangatho we-NACE MR0175, njengeIzifakelo zeTubhu, Ukufakwa kwemibhobho, Iivalvu zeBhola, Iivalvu zeenaliti, Jonga iiValves, Iivalve zoNcedo, Iisilinda zeesampuli.