API 5L GR.Bpombi yesimbi isina musono ipombi inoshandiswa zvakanyanya muindasitiri yemafuta negesi, ichienderana nezvinodiwa neAPI 5Lmwero weAmerican Petroleum Institute. Magiredhi akajairika ekushandisa pasi pemwero uyu anosanganisira PSL1 levelGR.A, GR.B, GR.X42 kusvika GR.X52, uye PSL2 level GR.X56 kusvika GR.X80. Nhamba idzi dzinomiririra simba shoma remukoho, rinoyerwa mu ksi. GR.B isimbi ine simba repakati nepakati ine hunhu hwakanaka hwemakanika uye inokwanisa kusvetwa.
Kuumbwa kwemakemikari eGR.B kunosanganisira huwandu hwekabhoni husingapfuure 0.28%, huwandu hwemanganese husingapfuure 1.20%, uye kudzora kwakasimba pamusoro petsvina yakaita sephosphorus nesarufa. Simba rayo rekudhonza harisi pasi pe414 MPa, simba rayo rekugadzira harisi pasi pe241 MPa, uye kureba kwayo hakusi pasi pe21%. Inogona kusangana nezvinodiwa zvekufambisa kwepakati nepakati nekumanikidzwa kwakanyanya. Maitiro ekugadzira mapaipi esimbi asina musono anoita kuti ave nekukwanisa kwepamusoro kwekutakura kumanikidzwa uye kufanana, kwakakodzera nzvimbo dzine kumanikidzwa kwakanyanya. Pamusoro pezvo, zvinhu zveGR.B zvinogona kuchinjika kunzvimbo dzine tembiricha yakaderera kuburikidza nekuwedzerwa kwemiedzo yekukanganisa uye kuwedzera kudzivirira ngura kuburikidza nekuputira kwekudzivirira ngura.
Mapaipi esimbi asina musono eAPI 5L GR.B anonyanya kushandiswa pakutakura mafuta negasi, kusanganisira mapaipi epasi nekunze kwenyika, michina yekuchera matsime, uye mapaipi ekuboorera. Pamusoro pezvo, anoshandiswawo muindasitiri yemakemikari pakutakura zvinhu zvinoparadza, musimba nemagetsi emapombi ebhoyira ane simba rakawanda, muma network egesi nemvura muguta, pamwe nemuminda iri kubuda senge simba rehydrogen nekabhoni. Kana tichienzanisa nesimbi yakajairwa yekabhoni, GR.B ine simba guru uye inodzivirira kumanikidzwa, uye kana ichienzaniswa nesimbi isina ngura, inodhura zvishoma uye yakakodzera mapurojekiti makuru emapaipi.
Pakusarudza mapaipi esimbi eAPI 5L GR.B, zvinhu zvakaita sekushanda zvakanaka, tembiricha yekushanda uye zvinodiwa zvekudzivirira ngura zvinofanirwa kufungwa nezvazvo. Kune nharaunda dzakakosha senge mamiriro eacidic kana tembiricha yakaderera, zvinhu zvePSL2 zvepamusoro-soro kana mimwe miedzo inofanirwa kugamuchirwa. Chinhu ichi, nekushanda kwacho kwakaringana uye mashandisirwo akasiyana-siyana, chave sarudzo yakakodzera yekutakura mapaipi ane simba repamusoro-soro kure.