NACE MR 0175 require the pipe material anti sour service for LSAW steel pipe.Such as H2S gas transportation. Special Test for NACE: Chemical Component Analysis especially for S,P content.
NACE MR 0175 require the pipe material anti sour service for LSAW steel pipe.Such as H2S gas transportation. Special Test for NACE: Chemical Component Analysis especially for S,P content.Hardness Vicker test usually performed.HIC/SWC test will be carried out according to NACE TM0284.Or if agreed in an alternative test.refer to ISO15156 Table B.3.SSC test will be carried out according to NACE TM0177,Solution A.A four-point bend test piece in accordance with ISO7539-2 or ASTM G39 shall be used and test duration shall be 720 hours. If agreed an alternative test accept refer to ISO15156.
Qualification validity
Test type ab
Applied stresscd
Environment
H2S partial pressure
Acceptance criteria
Remarks
Specific application or SSC region 1 or region 2 of Figure 1
UT
≥90% AYS
5% mass fraction NaCl + 0,4% mass fraction CH3COONa, h adjusted to required value using HCl or NaOH0
Appropriate to intended application or SSC region
No SSC cracks in accordance with NACE TM0177 assessment method
Specific application or less service environments. Region qualification subject to adequate coverage g
FPB or CR
DCB h
Notapplicable
Assessment shall be in accordance with NACE TM0177. Acceptance criteria shall be by documentedagreement
Use as qualification at equipment user’s discretion and with documented justification
All SSC region of Figure 1
UT
≥80% AYS
NACE TM0177-05 Environment A (5% mass fraction NaCl + 0,5% mass fraction CH3COOH)
100 kPa (15 psi) in accordance with NACE TM0177
No SSC cracks in accordance with NACE TM0177 assessment method
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FPB or CR
DCB h
Notapplicable
Assessment shall be in accordance with NACE TM0177. Acceptance criteria shall be by documented agreementk
Use as qualification at equipment user’s discretion and with documented justification
Our company also keep improving our production ability, we have brought in new equipment to make more sizes, now we could supply the heavy wall thickness 60mm.
Our LSAW steel pipes are good at producing the heavy wall thickness and large diameter LSAW /DSAW pipes,it is our advantage of LSAW technology,other pipes could not reach this point.
