Line pipe ( Sour Service)
Key Specifications / Features
Line pipe for sour service are produced with pure, fully killed, fine
grain steel.The content of sulphur, phosphor and other harmful
elements is strictly controlled. Meanwhile elements Nb, V, Al and
other alloy elements have been added. The pipe has not only high
resistance against H2S, but also have better performance of
mechanical properties, hardness, breaking toughness, fatigue
resistance and crack prevention ability. The test result of SSC (NACE
TM0177-2005) AND HIC(NACE TM0284-2003) have reached the
requirements of API 5L (44th edition) Annex H after the inspection of
competent authorities. This kind of pipe can fully meet the demand of
NACE MR0175 or ISO 15156.
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Detail Information
Line pipe for sour service are produced with pure, fully killed, fine
grain steel.The content of sulphur, phosphor and other harmful
elements is strictly controlled. Meanwhile elements Nb, V, Al and
other alloy elements have been added. The pipe has not only high
resistance against H2S, but also have better performance of
mechanical properties, hardness, breaking toughness, fatigue
resistance and crack prevention ability. The test result of SSC (NACE
TM0177-2005) AND HIC(NACE TM0284-2003) have reached the
requirements of API 5L (44th edition) Annex H after the inspection of
competent authorities. This kind of pipe can fully meet the demand of
NACE MR0175 or ISO 15156.
grain steel.The content of sulphur, phosphor and other harmful
elements is strictly controlled. Meanwhile elements Nb, V, Al and
other alloy elements have been added. The pipe has not only high
resistance against H2S, but also have better performance of
mechanical properties, hardness, breaking toughness, fatigue
resistance and crack prevention ability. The test result of SSC (NACE
TM0177-2005) AND HIC(NACE TM0284-2003) have reached the
requirements of API 5L (44th edition) Annex H after the inspection of
competent authorities. This kind of pipe can fully meet the demand of
NACE MR0175 or ISO 15156.
| DELIVERY CONDITION | |||||||
| Steel grade | Delivery condition | ||||||
| BNS(L245NS) | Normalizing rolled, normalizing formed, normalized, normalized and tempered | ||||||
| X42NS(L290NS) | Normalizing rolled, normalizing formed, normalized, normalized and tempered | ||||||
| X46NS(L320NS) | Normalizing rolled, normalizing formed, normalized, normalized and tempered | ||||||
| X52NS(L360NS) | Normalizing rolled, normalizing formed, normalized, normalized and tempered | ||||||
| BQS(L245QS) | Quenched and tempered | ||||||
| X42QS(L290QS) | Quenched and tempered | ||||||
| X46QS(L320QS) | Quenched and tempered | ||||||
| X52QS(L360QS) | Quenched and tempered | ||||||
| X56QS(L390QS) | Quenched and tempered | ||||||
| X60QS(L415QS) | Quenched and tempered | ||||||
|
MECHANICAL PROPERTIES |
|||||||
| Steel Grade | Strtch Performance |
Impact |
Hardness | ||||
| Yield strength | Tensile strength | Elongation | |||||
| Mpa | Mpa | % | Min | Max | |||
| Min | Max | Min | Max | ||||
|
BNS(L245NS) BQS |
245 | 450 | 415 | 760 | As per standard |
27 | 22HRC OR 250HV10 |
|
X42NS(L290NS) X42Q |
290 | 495 | 415 | 760 | 27 | ||
|
X46NS(L320NS) X46Q |
320 | 525 | 435 | 760 | 27 | ||
|
X52NS(L360NS) X52Q |
360 | 530 | 460 | 760 | 27 | ||
| X56QS(L390QS) | 390 | 545 | 490 | 760 | 27 | ||
| X60QS(L415QS) | 450 | 600 | 520 | 760 | 27 | ||
| CORROSION RESISTANCE TEST | |||||||
| Corrosion resistance test | Test method | Solution | Benchmark stress |
Test duration (hou) |
Test result | ||
| SSC test | NACE TM0177-2005 |
Solution A | SMYSx72% | 720 | No break | ||
| HIC test | NACE TM0284-2003 |
Solution A | - | 96 | CSR≦2.0% Qualified CTR≦5.0% Qualified CLR≦15.0% Qualified |
||
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