API 5CT se yon estanda entènasyonalman rekonèt devlope pa Enstiti Ameriken Petwòl (API) pou aman ak tib yo itilize nan perçage lwil oliv ak gaz. Dènye vèsyon an se API 5CT edisyon 10 (lage nan 2022).
Kondisyon debaz li yo enkli:
1. Klas materyèl: Divize an H40, J55, K55, N80, L80, C90, T95, P110, elatriye, chak klas koresponn ak yon fòs sede diferan (egzanp, J55 se 55-80 ksi, P110 pi gran pase oswa egal a 110 ksi).
2. Dimansyon: Dyamèt ekstèn varye ant 4.5 pous a 20 pous, epesè miray soti nan 2.5 mm a 25 mm, epi yo dwe konfòme yo ak estanda fil API SPEC 5B.
3. Tès Atik: Dwe pase tès idrostatik (valè presyon Pi gran pase oswa egal a 80% nan fòs la sede minimòm nan tiyo an asye), tès ki pa -destriktif (ultrason oswa Eddy aktyèl), analiz konpozisyon chimik, elatriye.
Estanda entènasyonal API 5CT aplike nan kat gwoup pwodwi sa yo:
Gwoup 1: Tout aman ak tib (estanda bwat ak tib) nan klas asye H, J, K, ak N
Gwoup 2: Tout bwat ak tib (rezistan korozyon) nan klas asye C, L, M, ak T
Gwoup 3: Tout aman ak tib (fòs segondè) nan klas asye P
Gwoup 4: Tout aman (fòs segondè) nan klas Q asye
konpozisyon chimik
| Estanda | Klas | C(%) | Si(%) | Mn(%) | P(%) | S(%) | Cr (%) | Ni (%) | Cu (%) | Mo (%) | V(%) | Als(%) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| API SPEC 5CT | J55 K55 (37MnVS) |
0.34-0.39 | 0.20-0.35 | 1.25-1.50 | Mwens pase oswa egal a 0.020 | Mwens pase oswa egal a 0.015 | Mwens pase oswa egal a 0.15 | Mwens pase oswa egal a 0.20 | Mwens pase oswa egal a 0.20 | / | / | Mwens pase oswa egal a 0.020 |
| N80 (36Mn2V) | 0.34-0.38 | 0.20-0.35 | 1.45-1.70 | Mwens pase oswa egal a 0.020 | Mwens pase oswa egal a 0.015 | / | / | / | / | 0.11-0.16 | Mwens pase oswa egal a 0.020 | |
| L80 (13Cr) | 0.15-0.22 | Mwens pase oswa egal a 1.00 | 0.25-1.00 | Mwens pase oswa egal a 0.020 | Mwens pase oswa egal a 0.010 | 12.0-14.0 | Mwens pase oswa egal a 0.20 | Mwens pase oswa egal a 0.20 | / | / | Mwens pase oswa egal a 0.020 | |
| P110 (30CrMo) | 0.26-0.35 | 0.17-0.37 | 0.40-0.70 | Mwens pase oswa egal a 0.020 | Mwens pase oswa egal a 0.010 | 0.80-1.10 | Mwens pase oswa egal a 0.20 | Mwens pase oswa egal a 0.20 | / | 0.15-0.25 | Mwens pase oswa egal a 0.08 |
Pwopriyete mekanik
| Standrd | Klas | Fòs rupture (MPa) | Fòs sede (MPa) | Dite |
|---|---|---|---|---|
| API SPEC 5CT | J55 | Pi gran pase oswa egal a 517 | 379-552 | - |
| K55 | Pi gran pase oswa egal a 517 | Pi gran pase oswa egal a 655 | - | |
| N80 | Pi gran pase oswa egal a 689 | 552-758 | - | |
| L80(13Cr) | Pi gran pase oswa egal a 655 | 552-689 | Mwens pase oswa egal a 241HB | |
| P110 | Pi gran pase oswa egal a 862 | 758-965 | - |
