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Seamless pipes API 5L grade x52 psl 2

Aisyah Widjaja
Aisyah Widjaja

This document specifies high yield seamless steel pipes that meet API 5L grade X52 PSL 2 for use in fixed offshore structures. The pipes are seamless and made of fine grain killed steel. They have enhanced yield strength of up to 360 MPa and impact values down to -50属C. The pipes undergo non-destructive testing, hydrostatic testing, and meet mechanical properties requirements including minimum yield strength, tensile strength ratio, and Charpy V-notch impact values. Dimensional and chemical composition requirements are also specified.

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Stock Specifications - Pipes High yield seamless Pipe API 5L grade X52 PSL 2 Suitable for weldable structural steels for fixed offshore structures X52 (enhanced) high yield seamless pipes, modified to suit offshore structural purposes. Intended for (but not limited to) use in fixed offshore structures, designed to operate in the offshore sector. Applicable codes and standards API 5L, 45th Edition / ISO 3183 Specification for line pipe - technical delivery conditions Grade X - The steel pipe mentioned herein is substantially modified from the API 5L, X52 standard. - Pipes are fully killed and fine grain steel material. - NACE MR0175:Satisfactory - This steel offers enhanced yield tensile ratio of 0.87 (max) and impact values verified from as low as -50属C. - This grade is also known as L360Q in USC Units. Chemical composition with thickness (t) 25mm Product analysis in % (All values are max. unless otherwise stated.) Minimum Yield X 52 Q PSL 2 C 0,16 Si 0,45 Mn 1,10 - 1,60 P 0,025 S 0,005 Cr 0,20 Mo 0,08 Ni 0,20 Al 0,020 - 0,060 CEV = C + + + Mn Cr+Mo+V Ni+Cu 6 5 15 Cu 0,20 N 0,014 Nb1 0,04 Ti 0,02 V 0,05 As 0,02 Sb 0,01 Sn 0,015 Pb - Pcm = C + + + + + + 5B Delivery condition PSL The X symbol followed by a two or three digit number equal to the specified minimum yield strength in 1000 psi rounded down to the near- est integer. + N Normalizing rolling + Q Quenched and tempered where Q refers to a heat treatment process consisting of quench hardening followed by tempering. Cr+Mo+Ni+Cu 0,5 Nb+V 0,1 Nb+V+Ti 0,12 CEV (IIW) see formula below 0,432 Pcm see formula below 0,232 Bi 0,010 Ca 0,005 B 0,0005 Si Mn+Cu+Cr Ni Mo V 30 20 60 15 10 1 All nitrogen shall be tied up as nitrides. Al (total) to N ratio shall be at least 2.2:1 2 CEV & Pcm may vary as wall thickness of pipe increases. PSL refers to the product specification level where PSL2 provides a more extensive chemical composition complete with a mandatory minimum fracture toughness. At pipe body 360 MPa (52,200 psi)
Surface (a) All surfaces have been 100% visually inspected. The surface condition complies with API 5L Annex E. (b) External surface of pipe shall be coated with a layer of varnish. NDT All pipes will be ultrasonic tested on pipe body and pipe end as per API 5L Annex E, Table E.2 and para E.3.3. Coverage: (a) longitudinal: 100% of the pipe surface (b) pipe ends not scanned by automatic ultrasonic system shall be inspected by manual UT or Magnetic Particle Examination. Hydrostatic test (a) Test pressure may not exceed 2970 psi in accordance to API 5L requirements (b) Holding time: minimum 5 seconds Certification and traceability All dimensions will be supplied with a 3.2 certificate according to EN 10204, endorsed by recognized and independent inspection agency. Marking shall be in SI units (X52) accordance with API requirements & mill standard. Dimensional control All dimensions will be supplied according to API 5L clause 9.11; In addition, the following tolerances apply: (a) Pipe body: +/- 0,75% (b) Pipe end: +/- 0,5% (c) Wall thickness: +15%, -12,5% (d) Length: -0 / +100mm Pipe Ends Pipe Ends are bevelled. End angle shall be 30属- 0属/+5属, root face shall be 1.6mm +/- 0.8mm and fitted with bevel protectors. Protection Pipes are varnished on the outside. Mechanical properties API 5L, enhanced grade X52Q, PSL 2 Thickness t Yield Reh Tensile Rm Reh / Rm CVN El mm MPa MPa - -50 属C % - min. 360 Min. 460 Max. 760 max. 0,87 min. 36J avg. 42J transverse min. 22 Rev 1 I September 2013

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Seamless pipes API 5L grade x52 psl 2

  • 1. Stock Specifications - Pipes High yield seamless Pipe API 5L grade X52 PSL 2 Suitable for weldable structural steels for fixed offshore structures X52 (enhanced) high yield seamless pipes, modified to suit offshore structural purposes. Intended for (but not limited to) use in fixed offshore structures, designed to operate in the offshore sector. Applicable codes and standards API 5L, 45th Edition / ISO 3183 Specification for line pipe - technical delivery conditions Grade X - The steel pipe mentioned herein is substantially modified from the API 5L, X52 standard. - Pipes are fully killed and fine grain steel material. - NACE MR0175:Satisfactory - This steel offers enhanced yield tensile ratio of 0.87 (max) and impact values verified from as low as -50属C. - This grade is also known as L360Q in USC Units. Chemical composition with thickness (t) 25mm Product analysis in % (All values are max. unless otherwise stated.) Minimum Yield X 52 Q PSL 2 C 0,16 Si 0,45 Mn 1,10 - 1,60 P 0,025 S 0,005 Cr 0,20 Mo 0,08 Ni 0,20 Al 0,020 - 0,060 CEV = C + + + Mn Cr+Mo+V Ni+Cu 6 5 15 Cu 0,20 N 0,014 Nb1 0,04 Ti 0,02 V 0,05 As 0,02 Sb 0,01 Sn 0,015 Pb - Pcm = C + + + + + + 5B Delivery condition PSL The X symbol followed by a two or three digit number equal to the specified minimum yield strength in 1000 psi rounded down to the near- est integer. + N Normalizing rolling + Q Quenched and tempered where Q refers to a heat treatment process consisting of quench hardening followed by tempering. Cr+Mo+Ni+Cu 0,5 Nb+V 0,1 Nb+V+Ti 0,12 CEV (IIW) see formula below 0,432 Pcm see formula below 0,232 Bi 0,010 Ca 0,005 B 0,0005 Si Mn+Cu+Cr Ni Mo V 30 20 60 15 10 1 All nitrogen shall be tied up as nitrides. Al (total) to N ratio shall be at least 2.2:1 2 CEV & Pcm may vary as wall thickness of pipe increases. PSL refers to the product specification level where PSL2 provides a more extensive chemical composition complete with a mandatory minimum fracture toughness. At pipe body 360 MPa (52,200 psi)
  • 2. Surface (a) All surfaces have been 100% visually inspected. The surface condition complies with API 5L Annex E. (b) External surface of pipe shall be coated with a layer of varnish. NDT All pipes will be ultrasonic tested on pipe body and pipe end as per API 5L Annex E, Table E.2 and para E.3.3. Coverage: (a) longitudinal: 100% of the pipe surface (b) pipe ends not scanned by automatic ultrasonic system shall be inspected by manual UT or Magnetic Particle Examination. Hydrostatic test (a) Test pressure may not exceed 2970 psi in accordance to API 5L requirements (b) Holding time: minimum 5 seconds Certification and traceability All dimensions will be supplied with a 3.2 certificate according to EN 10204, endorsed by recognized and independent inspection agency. Marking shall be in SI units (X52) accordance with API requirements & mill standard. Dimensional control All dimensions will be supplied according to API 5L clause 9.11; In addition, the following tolerances apply: (a) Pipe body: +/- 0,75% (b) Pipe end: +/- 0,5% (c) Wall thickness: +15%, -12,5% (d) Length: -0 / +100mm Pipe Ends Pipe Ends are bevelled. End angle shall be 30属- 0属/+5属, root face shall be 1.6mm +/- 0.8mm and fitted with bevel protectors. Protection Pipes are varnished on the outside. Mechanical properties API 5L, enhanced grade X52Q, PSL 2 Thickness t Yield Reh Tensile Rm Reh / Rm CVN El mm MPa MPa - -50 属C % - min. 360 Min. 460 Max. 760 max. 0,87 min. 36J avg. 42J transverse min. 22 Rev 1 I September 2013