Nace TM0177 High Collapse Sour Service Casing
Applicable standards and technical requirements
API SPEC 5CT Specification for casing and tubing
API TR 5C3 Calculated performance properties of pipe used as casing or tubing
API BULL 5C2 Performance of casing, tubing and drill pipe
Applicable standards and technical requirements
API SPEC 5CT Specification for casing and tubing
API TR 5C3 Calculated performance properties of pipe used as casing or tubing
API BULL 5C2 Performance of casing, tubing and drill pipe
ANSI/NACE MR0175 Petroleum and natural gas industries-materials used in hydrogen sulfide(H2S)environment for petroleum products
ANSI/NACE TM0177 Stress corrosion cracking test of metals in hydrogen sulfide environment
ISO15156 Petroleum and natural gas industries -material for use in oil and gas exploration
ISO 13680 Petroleum and natural gas industries-Technical delivery conditions for corrosion -resistant seamless alloy tubing, casing and coupling
Mechanical Property
Grade | Yield strength/Mpa | Tensiile strength/Mpa | Hardness(HRC) |
BL80TS/BL80TSS | 552~655 | ≥655 | ≤21 |
BL90TS/BL90TSS | 621~724 | ≥689 | ≤22 |
BL95TS/BL95TSS | 655~758 | ≥724 | ≤23 |
BL110TS/BL110TSS | 758~862 | ≥792 | ≤30 |
High collapse sour service casing
Type | Grade | SCC test,Method A | Collapse performance |
High collapse + sour service | BL80TS | 0.8Ys min, 720 h | More than API standard 25% |
BL90TS | |||
BL95TS | |||
BL110TS | |||
High collapse + sour service | BL80TSS | 0.9Ys min,720 h | |
BL90TSS | |||
BL95TSS | |||
BL110TSS | 0.85Ys min,720 h |
