Birta dhismaha maraakiibta guud ahaan waxaa loola jeedaa birta loogu talagalay qaab-dhismeedka qolofka, taas oo loola jeedo birta loo isticmaalo in lagu sameeyo qaab-dhismeedka qolofka ee la soo saaro iyadoo la raacayo shuruudaha qeexitaannada dhismaha bulshada ee kala-soocidda. Badanaa waa la dalbadaa, la qorsheeyaa oo loo iibiyaa sidii bir gaar ah. Hal markab waxaa ku jira taarikada maraakiibta, birta qaabaysan, iwm.
Waqtigan xaadirka ah, dhowr shirkadood oo waaweyn oo birta ah oo ku yaal dalkayga ayaa leh wax soo saar, waxayna soo saari karaan badeecadaha birta badda iyadoo loo eegayo baahiyaha isticmaalaha ee dalal kala duwan, sida Mareykanka, Norway, Japan, Jarmalka, Faransiiska, iwm. Tilmaamaha waa sida soo socota:
| Waddan | Heerka Caadiga ah | Waddan | Heerka Caadiga ah |
| Mareykanka | ABS | Shiinaha | CCS |
| Jarmalka | GL | Noorway | DNV |
| Faransiiska | BV | Jabaan | KDK |
| UK | LR |
(1) Qeexitaannada kala duwan
Birta qaab-dhismeedka ee qolofta waxaa loo qaybiyaa heerarka xoogga iyadoo loo eegayo heerka ugu yar ee wax soo saarkooda: birta qaab-dhismeedka xoogga guud iyo birta qaab-dhismeedka xoogga sare leh.
Birta dhismaha ee xoogga guud ee ay qeexday Bulshada Kala-soocidda Shiinaha waxay u qaybsan tahay afar heer oo tayo leh: A, B, D, iyo E; birta dhismaha ee xoogga badan ee ay qeexday Bulshada Kala-soocidda Shiinaha waxay u qaybsan tahay saddex heer oo xoog leh iyo afar heer oo tayo leh:
| A32 | A36 | A40 |
| D32 | D36 | D40 |
| E32 | E36 | E40 |
| F32 | F36 | F40 |
(2) Sifooyinka farsamada iyo halabuurka kiimikada
Guryaha farsamada iyo halabuurka kiimikada ee qolofta xoogga guud ee birta qaab-dhismeedka
| Heerka Birta | Qodobka Wax-soo-saarkaσs(MPa) Min | Xoogga Tijaabadaσb(MPa) | Kordhintaσ%Ugu yaraan | C | 锰Mn | Si | 硫S | 磷P |
| A | 235 | 400-520 | 22 | ≤0.21 | ≥2.5 | ≤0.5 | ≤0.035 | ≤0.035 |
| B | ≤0.21 | ≥0.80 | ≤0.35 | |||||
| D | ≤0.21 | ≥0.60 | ≤0.35 | |||||
| E | ≤0.18 | ≥0.70 | ≤0.35 |
Sifooyinka farsamada iyo halabuurka kiimikada ee birta qaab-dhismeedka qolofka xoogga sare leh
| Heerka Birta | Qodobka Wax-soo-saarkaσs(MPa) Min | Xoogga Tijaabadaσb(MPa) | Kordhintaσ%Ugu yaraan | C | 锰Mn | Si | 硫S | 磷P |
| A32 | 315 | 440-570 | 22 | ≤0.18 | ≥0.9-1.60 | ≤0.50 | ≤0.035 | ≤0.035 |
| D32 | ||||||||
| E32 | ||||||||
| F32 | ≤0.16 | ≤0.025 | ≤0.025 | |||||
| A36 | 355 | 490-630 | 21 | ≤0.18 | ≤0.035 | ≤0.035 | ||
| D36 | ||||||||
| E36 | ||||||||
| F36 | ≤0.16 | ≤0.025 | ≤0.025 | |||||
| A40 | 390 | 510-660 | 20 | ≤0.18 | ≤0.035 | ≤0.035 | ||
| D40 | ||||||||
| E40 | ||||||||
| F40 | ≤0.16 | ≤0.025 | ≤0.025 |
(3) Taxaddarrada keenista iyo aqbalaadda alaabada birta badda:
1. Dib u eegista shahaadada tayada:
Warshadda birta ah waa inay alaabta u keentaa sida waafaqsan shuruudaha isticmaalaha iyo qeexitaannada lagu heshiiyay qandaraaska, isla markaana ay bixisaa shahaadada tayada asalka ah. Shahaadadu waa inay ka kooban tahay waxyaabaha soo socda:
(1) Shuruudaha qeexidda;
(2) Lambarka diiwaanka tayada iyo lambarka shahaadada;
(3) Tirada dufcadda foornada, heerka farsamada;
(4) Halabuurka kiimikada iyo sifooyinka farsamada;
(5) Shahaadada oggolaanshaha ee ka timid bulshada kala-soocidda iyo saxiixa sahamiyaha.
2. Dib u eegis jireed:
Si loo keeno birta badda, shayga jireed waa inuu lahaadaa astaanta soo saaraha, iwm. Gaar ahaan:
(1) Calaamadda oggolaanshaha bulshada kala-soocidda;
(2) Isticmaal rinji si aad u sawirto ama u dhejiso calaamadda, oo ay ku jiraan xuduudaha farsamada sida: tirada dufcadda foornada, heerka caadiga ah ee qeexitaanka, cabbirka dhererka iyo ballaca, iwm.;
(3) Muuqaalku waa siman yahay oo siman yahay, oo aan lahayn cillado.
Waqtiga boostada: Maarso-16-2024
