What is API 5L X56 equivalent to?
API 5L X56 also called L390 Pipe named by yield strength 390 Mpa, it covers manufacturing types in seamless and welded (ERW, EFW, SAW) types. L390 pipe contains two product specification levels PSL1, PSL2. And for different services like sour, onshore, offshore services.
Chemical Composition for API 5L X56 PSL 1 pipe
| Steel Grade | Mass fraction, % based on heat and product analyses a,g | ||||||
|---|---|---|---|---|---|---|---|
| C | Mn | P | S | V | Nb | Ti | |
| max b | max b | max | max | max | max | max | |
| Seamless Pipe | |||||||
| X56 | 0.28 e | 1.40 e | 0.3 | 0.3 | d | d | d |
| Welded Pipe | |||||||
| X56 | 0.26 | 1.4 | 0.3 | 0.3 | d | d | d |
| a. Cu ≤ = 0.50% Ni; ≤ 0.50%; Cr ≤ 0.50%; and Mo ≤ 0.15%, b. For each reduction of 0.01% below the specified maximum concentration for carbon, an increase of 0.05% above the specified maximum concentration for Mn is permissible, up to a maximum of 1.65% for grades ≥ L245 or B, but ≤ L360 or X52; up to a maximum of 1.75% for grades > L360 or X52, but < L485 or X70; and up to a maximum of 2.00% for grade L485 or X70., c. Unless otherwise agreed NB + V ≤ 0.06%, d. Nb + V + TI ≤ 0.15%, e. Unless otherwise agreed., f. Unless otherwise agreed, NB + V = Ti ≤ 0.15%, g. No deliberate addition of B is permitted and the residual B ≤ 0.001% |
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