According to API specifications there are two types of steels used in the construction of line pipes:
The
following table lists the current ASTM
and API standards.
ASTM Specifications | Manufacturing Process | Grade |
A53 (type F) | Continuous or face butt welded | |
A53 (type E) | Electric resistance welded | A-B |
A53 (type S) | Seamless | A-B |
A106 | Seamless | A-B-C |
A134 | Arc welded | |
A139 | Arc welded | A-B-C-D-E |
A211 | Spiral welded | |
A252 | Welded or seamless | |
A333 | Welded or seamless | 1,6 |
A381 | Submerged Arc welded | |
A523 | Electric resistance welded | A-B |
Seamless | A-B | |
A524 | Seamless | I,II |
A587 | Electric resistance welded | |
A589 | Welded (h) or seamless | |
A671 | Arc welded | |
A672 | Arc welded | |
A691 | Arc welded | |
A795 | Welded or seamless | A-B |
API Specifications | Manufacturing Process | Grade |
2B | Arc welded | H40, J55, K55, N80 |
5CT | Welded or seamless | C75 type2, P105, P110 |
5CT | Seamless | A25 class I |
5L | Electric welded | A25 class II, A-B |
Furnace butt welded | A25 class I, A-25 class II | |
Submerged Arc welded | A-B | |
Seamless | A25 class I, A25 class II, A-B | |
Spiral welded | A-B, X42,X46, X52 | |
Welded | X42 | |
Welded/cold expanded | X46, X52 | |
Welded, non expanded | X46, X52 | |
Seamless, cold expanded | X42, X46, X52 | |
Seamless, non expanded | X46, X52 |
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