-
Industries Overview
-
Products & Solutions
-
News & MediaStay informed on TSISCO’s latest developments, global project and industry contributions as we power the world’s infrastructure. -
Capabilities & SustainabilityWe combine advanced manufacturing capabilities with deep commitment to sustainability by delivering long-term value through responsible innovation. -
About UsWith years of experience and innovation, we strive to create value for our customers and build long-term partnerships.
Oil & Gas Line Pipe
Oil & Gas Line Pipe
Oil & Gas Line Pipe｜Global Sourcing for Engineering & Procurement
1. Product Positioning & Scope
• Positioning: Steel line pipe and systems for crude oil, refined products, natural gas, associated gas and CO₂ (CCUS) over onshore, offshore and subsea routes. Targets include strength and toughness (with fracture arrest), low-temperature and external-pressure resistance, weldability, and resistance to H₂S/CO₂/Cl⁻, aligned with lifecycle integrity management.
2. Standards Matrix (combine “design code + product standard + auxiliaries”)
• Product standards: API 5L (PSL1/PSL2), ISO 3183, GB/T 9711 (CN), CSA Z245.1 (CA), EN ISO 3183 (EU).
• Design codes: ASME B31.4 (liquids), ASME B31.8 (gas), DNV-ST-F101 (offshore/subsea), ISO 13623 (general).
• Coatings & internal lining: CSA Z245.20 (FBE), CSA Z245.21 (3LPE/3LPP), DIN 30670 (3LPE), DIN 30678 (3LPP); internal/flow coatings per project specs.
• Sour service: NACE MR0175/ISO 15156; HIC per TM0284 and SSC per TM0177 as required.
• Fittings: MSS SP-75 (WPHY), ASME B16.5/B16.47 (flanges), API 6D (pipeline valves).
• CO₂ pipelines: ISO 27913.
3. Scenario–Material–Standard–Size Mapping
• Sweet dry gas or dehydrated liquids: API 5L PSL2 X52–X70 (HFW/SAWL/seamless), 3LPE or 3LPP plus CP; optional internal flow coat. Typical ODs 1/2 in to 56 in; DRL 11–13 m; SAWL up to 18 m.
• Moderate sour (H₂S/CO₂ with moderate chlorides): PSL2 X52/X60 with HIC/SSC and hardness control (BM/WM/HAZ typically ≤ 250 HV10); internal coating or local CRA lining at hot spots.
• Severe sour/deepwater/high chlorides: CS substrate with CRA (316L/2205/625) lined/clad or full CRA; comply with DNV-ST-F101 for external pressure, stability and fracture control; 3LPP or insulation plus CWC.
• Long-distance high-pressure gas (fracture arrest): PSL2 X65–X80 with CVN/DWTT at service Tmin; crack arrestors/heavy-wall sections and full-scale validation as required.
• High-temperature station tie-ins: A335 P22/P91 or 625 overlay/liner; out of API 5L scope.
• Water injection/seawater/firewater: duplex 2205/2507 or Cu-Ni with B16.5/B16.47 and offshore specs; not API 5L scope.
• CO₂ (dry/wet, near-critical): PSL2 X65–X70 with ISO 27913; wet CO₂ tends to CRA lining/cladding; ensure brittle-fracture and crack-propagation control.
• Process selection note: HFW/SAWL/seamless commonly used for high-pressure/HCA; SAWH subject to Operator’s spec for moderate/low-pressure duties.
4. Dimensions & Tolerances (typical capability)
• OD: ~1/2 in to 56 in (some onshore/subsea mains to ~60 in). Lengths: SRL 5–7 m, DRL 11–13 m; SAWL UOE/JCOE up to 18 m.
• Wall thickness: governed by design and D/t; typical 3–40 mm; thicker for subsea external-pressure segments. Ends: bevel or plain; HFW/SAW may be mechanically expanded.
• Key tolerances: OD ≈ ±0.5%·D; minimum WT commonly ≥ 87.5%·t; ovality/straightness/end-squareness and weld hi-lo/reinforcement per API 5L/PO; maintain ID smoothness for piggability.
5. Manufacturing & Critical Controls
• Steelmaking & chemistry: BOF/EAF → LF/VD/VOD; low S/P, inclusion control (Ca treatment), micro-alloying (Nb/V/Ti).
• Rolling & base material: TMCP or Q+T; coils for HFW/SAWH; plates for SAWL.
• Pipe making: seamless (pierce/extrusion + sizing), HFW, SAWL (UOE/JCOE), SAWH; consumables and heat input traceable.
• Heat treatment & sizing: N/N+T/Q+T; HFW seam normalizing; expansion/sizing/straightening to control roundness and residual stress.
• External coating & internal lining: FBE, 3LPE, 3LPP; field-joint coating compatibility; subsea ARO/CWC and thermal insulation; internal flow epoxy or CRA lined/clad/overlay per ITP.
6. Inspection & Documentation
• PSL2 verification: chemistry/mechanics/geometry, CVN and DWTT where specified; 100% weld UT (RT/DR/AUT as per spec); hydrotest each or per code.
• Sour-service set: HIC/SSC, hardness and metallography; batch traceability for welding consumables/flux. Offshore/HCA may require CTOD and full-scale collapse/buckle/burst tests.
• Deliverables: EN 10204 3.1/3.2 MTC; NDE/hydro/toughness/sour/coating reports; heat/weld traceability; 3rd-party or class witnessing as required.
7. Supply Forms & Packing
• Forms: seamless, HFW, SAWL, SAWH; CRA lined/clad; MSS SP-75 fittings; ASME B16.5/B16.47 flanges; induction bends, tees, reducers, insulating joints.
• Packing & marking: end caps; rust-preventive oil or factory coating; matched FJC kits for subsea; marking and barcode/QR with grade, PSL, size, length, heat/weld IDs, expansion rate, inspection status and coating system.
8. RFQ/PO Checklist (contract-ready)
1. Design code + product standard, e.g., “ASME B31.8 + API 5L/ISO 3183”; subsea: “DNV-ST-F101 + API 5L”.
2. Grade & PSL, e.g., “API 5L PSL2 X65 SAWL (UOE)”:; define CVN temp/targets and DWTT (temp, shear, energy).
3. Service & corrosion: H₂S/CO₂ partial pressures, Cl⁻, water content, pH, P/T, design life; sour requirement (MR0175/ISO 15156) and hardness limit.
4. Manufacture & geometry: process (seamless/HFW/SAWL/SAWH), expansion ratio, bevel, length (SRL/DRL/18 m), D/t & ovality.
5. Coating/lining: FBE/3LPE/3LPP (total/adhesive/top), ARO/CWC/insulation, FJC system & QC; CRA lining/cladding/overlay thickness and locations.
6. Testing: 100% weld UT (RT/DR/AUT as specified), geometry, hydro; sour HIC/SSC; subsea CTOD/full-scale/external pressure.
7. Fittings/valves: MSS SP-75 class, ASME B16.5/B16.47, API 6D valves.
8. Documentation & witness: MTC 3.1/3.2; NDE/hydro/toughness/sour/coating reports; 3rd-party/class witness.
9. Construction constraints: WPS/PQR, preheat/interpass, PWHT; field bend limit; pigging & drying (dew point); lifting/transport protection.
9. Quick Selection Guide
• Gas trunklines: PSL2 X65–X70 with CVN/DWTT at Tmin; process HFW/SAWL/seamless; 3LPE/3LPP external.
• Sour crude/wet gas: PSL2 X52/X60 with HIC/SSC; hardness ≤ ~250 HV10; internal coating or CRA lining at hot spots.
• Deepwater flowlines: CS + 316L/2205/625 lined/clad; DNV-ST-F101 checks for external pressure, buckle and fracture; 3LPP + ARO or CWC.
• CO₂ (CCUS): PSL2 X65–X70 per ISO 27913; wet CO₂ favors CRA lining/cladding; ensure brittle-fracture and crack-propagation control.
10. Procurement, Construction & O&M Risk Notes
• Using PSL1 for trunklines that require PSL2; applying lines without CVN/DWTT to high-pressure gas; skipping HIC/SSC or hardness control for sour service; incompatible FJC with factory coating; using A106/A333 as API 5L linepipe; adopting SAWH in HCA without dedicated compliance and fracture assessment. Treat these as “no-go” or warnings.
11. Example Spec Lines (copy-ready)
• Onshore gas trunkline:
“API 5L PSL2 X70 SAWL (UOE), OD 36 in × WT 0.750 in × L 12 m; CVN (BM/WM/HAZ) ≥ 60 J @ −20 °C; DWTT ≥ 85% shear @ −10 °C; 100% AUT; 3LPE total ≥ 2.5 mm; hydro each; MTC 3.2 (3rd-party).”
• Sour crude line:
“API 5L PSL2 X60 HFW, OD 20 in × WT 0.500 in; sour service: hardness ≤ 250 HV10 (BM/WM/HAZ); HIC/SSC per TM0284/TM0177; external FBE ≥ 400 μm; 100% UT + spot RT; MTC 3.2.”
• Deepwater flowline:
“CS + CRA lined (316L 2.5 mm), API 5L PSL2 X65 SAWL, OD 12.75 in × WT 1.0 in; DNV-ST-F101 MPS/CTOD; 3LPP + ARO, CWC where needed; qualified FJC; full-scale collapse/fracture tests; MTC 3.2 (DNV witnessed).”
• CO₂ pipeline (CCUS):
“API 5L PSL2 X65 SAWL, OD 24 in × WT 0.625 in; ISO 27913; CVN/DWTT as per RFQ; 3LPE; CP & insulating joints; MTC 3.1/3.2.”
12. Representative Global Producers (examples, A-Z)
• Europe: EUROPIPE, Salzgitter Mannesmann Line Pipe, Corinth Pipeworks, Borusan Mannesmann, Vallourec (seamless/OCTG/linepipe), EEW (large LSAW).
• North America: Tenaris, Berg Pipe (LSAW), Welspun USA (SAW).
• Japan: Nippon Steel, JFE Steel.
• Korea: POSCO, Hyundai Steel.
• China: TPCO (seamless/linepipe), Baowu/Baosteel (plate/SAW/stainless), Ansteel, PCK, Hengyang Valin, Shougang Jingtang.
• India: Jindal SAW, Welspun Corp, Maharashtra Seamless, ISMT, Man Industries.
Note: Ranges in manufacturing routes (seamless/HFW/SAWL/SAWH/CRA/clad), grade coverage, subsea qualifications and 3rd-party certifications vary by mill; request latest capability and approvals in the RFQ.
Oil & Gas Line Pipe｜Technical Specifications
1. Definition and scope
• Steel line pipe and systems for crude oil, products, natural gas, wet gas, CO₂ (CCUS), onshore and subsea long-distance transportation.
• Targets: strength and toughness (incl. fracture arrest), low-temperature/external-pressure resistance, weldability and corrosion resistance (H₂S/CO₂/Cl⁻) under lifecycle integrity.
2. Standards and codes matrix
• Product: API 5L PSL1/PSL2; ISO 3183; GB/T 9711 (CN); CSA Z245.1 (CA); EN ISO 3183 (EU).
• Design: ASME B31.4 (liquids), ASME B31.8 (gas), DNV-ST-F101 (offshore/subsea), ISO 13623 (generic).
• Coating: CSA Z245.20 (FBE), Z245.21 (3LPE/3LPP); DIN 30670/30678; project specs for internal/flow coatings.
• Sour: NACE MR0175/ISO 15156; HIC (TM0284)/SSC (TM0177) when required.
• Fittings/valves: MSS SP-75 (WPHY), ASME B16.5/B16.47 (flanges), API 6D (pipeline valves).
• CO₂ pipelines: ISO 27913 as applicable.
3. Materials and grades
• Carbon-manganese linepipe steels: API 5L/ISO 3183/GB/T 9711 B (L245), X42 (L290), X46 (L320), X52 (L360), X56 (L390), X60 (L415), X65 (L450), X70 (L485), X80 (L555). X100/X120 require specific qualification and fracture control.
• CRA family: 316L (A312), duplex 2205/2507 (A790/A789), Alloy 625 (B444), 825 (B423), C-276, titanium for special seawater/sour extremes or linings/overlays.
• Lined/clad/overlay: explosion/hot-roll clad plates, mechanically lined pipe (MLP), internal weld overlay (e.g., 625/825).
• High-temp station spools: A335 P11/P22/P91 for station/plant piping only.
4. Dimensions, ends and tolerances (typical capability)
• OD: 1/2″–56″ (to ~60″ for some subsea/onshore mains).
• WT: governed by design and D/t; typical 3–40 mm, thicker for subsea/ext. pressure.
• Lengths: SRL 5–7 m, DRL 11–13 m, LSAW/UOE up to 18 m.
• Ends: standard bevel (~30° with ~1.6 mm land) or plain ends; HFW/SAW pipes may be mechanically expanded.
• Key tolerances: OD ≈ ±0.5%·D typical; minimum WT commonly ≥ 87.5%·t; ovality/straightness/end-squareness, weld hi-lo/ reinforcement per API 5L/PO; ID smoothness for piggability.
5. Manufacturing routes and control
• Steelmaking: BOF/EAF → LF/VD/VOD; low S/P, inclusion control (Ca treatment), micro-alloying Nb/V/Ti.
• Rolling: TMCP/controlled rolling/cooling or Q+T; coils (HFW/SAWH) and plates (SAWL).
• Pipe making: seamless (pierce-roll/extrusion + cold sizing), HFW, SAWL (UOE/JCOE SAW), SAWH (helical SAW); consumables and heat input traceable.
• Heat treatment & sizing: N/N+T/Q+T; HFW seam normalizing; expansion/sizing/straightening.
• External coating: FBE, 3LPE, 3LPP; field joint coating compatible; subsea ARO/concrete weight coating (CWC) and thermal insulation as needed.
• Internal: flow epoxy/CRA lining/cladding/overlay per ITP.
6. Key properties and qualification
• Mechanical: SMYS/SMTS/elongation; flattening/bending; geometry.
• Toughness & fracture control: CVN at specified temperature (base/WM/HAZ); DWTT for large-diameter gas/low-temp lines; CTOD/full-scale as required (offshore/HCA).
• Sour: hardness limits (base/WM/HAZ typically ≤ ~250 HV10), HIC/SSC compliance; inclusion cleanness.
• Hydrotest/NDE: hydro per code/PO; 100% weld UT (RT/DR/AUT as specified); acceptance per API 5L/ISO 3183 and project.
7. Service–material–standard quick mapping (contract-ready)
• Sweet dry gas/dehydrated liquids: API 5L PSL2 X52–X70 (HFW/SAWL/seamless); external 3LPE/3LPP + CP; optional internal flow coat.
• Moderate sour (H₂S/CO₂ + moderate Cl⁻): PSL2 X52/X60 with HIC/SSC; hardness/inclusion control; local CRA lining/overlay or internal coating at hot spots.
• Severe sour / deepwater / high chlorides: CS substrate + CRA (316L/2205/625) lined/clad; DNV-ST-F101 external pressure/stability/fracture control; 3LPP or insulation + CWC.
• Long-distance high-pressure gas (fracture arrest): PSL2 X65–X80 with CVN/DWTT at service Tmin; crack arrestors/heavy-wall sections and full-scale validation as required.
• Station high-temp tie-ins: A335 P22/P91 or 625 overlay/liner; out of API 5L scope.
• Water injection/seawater/firewater: duplex 2205/2507 or Cu-Ni per service; not API 5L scope.
• CO₂ pipelines (dry/wet, near- or supercritical): PSL2 X65–X70 with ISO 27913; prefer CRA lining for wet CO₂; fracture and brittle-fracture control mandatory.
• Process selection: HFW/SAWL/seamless commonly used for high-pressure/HCA; SAWH subject to operator spec and commonly for moderate/low-pressure duties.
8. QA/QC & integrity
• PSL2 verification: chemistry/mechanics/CVN, DWTT where specified, geometry/appearance, 100% weld UT (RT/DR/AUT as specified), hydrotest.
• Sour: HIC/SSC, hardness, metallography; batch traceability of consumables/flux.
• Subsea/HCA: CTOD/full-scale tests, collapse/buckle/external-pressure, installation strain; qualified FJC; coating/insulation/CWC qualification.
• Deliverables: EN 10204 3.1/3.2 MTC; NDE/hydro/toughness/sour/coating reports; heat/batch traceability; 3rd-party witnessing where required.
9. Delivery, marking and packing
• Forms: seamless/HFW/SAWL/SAWH, CRA lined/clad, SP-75 fittings, B16.5/B16.47 flanges, induction bends, tees, reducers, insulating joints.
• Protection: end caps; rust-preventive oil or external coating; matched FJC kits for subsea.
• Marking: grade/PSL/size/length, heat & weld IDs, expansion rate, inspection status, coating system; barcode/QR for traceability.
10. RFQ/PO checklist (ready-to-use)
11. Design code + product standard: e.g., “ASME B31.8 + API 5L/ISO 3183”; subsea: “DNV-ST-F101 + API 5L”.
12. Grade & PSL: e.g., “API 5L PSL2 X65 SAWL (UOE)”; CVN temperature/targets; DWTT (temp/shear/energy).
13. Service & corrosion: H₂S/CO₂ partial pressures, Cl⁻, water, pH, P/T, design life; sour (MR0175/ISO 15156) and hardness limit.
14. Manufacture & geometry: process (seamless/HFW/SAWL/SAWH), expansion ratio, bevel details, length (SRL/DRL/18 m), D/t & ovality.
15. Coating/lining: FBE/3LPE/3LPP (total/adhesive/top), ARO/CWC/insulation, FJC system & QC; CRA lining/cladding/overlay thickness and locations.
16. Testing: 100% weld UT (RT/DR/AUT per spec), geometry, hydro; sour HIC/SSC; subsea CTOD/full-scale/external pressure.
17. Fittings/valves: MSS SP-75 class, B16.5/B16.47 pressure class, API 6D valves.
18. Documentation & witness: MTC 3.1/3.2, NDE/hydro/toughness/sour/coating reports; 3rd-party/class witness.
19. Construction constraints: WPS/PQR, preheat/interpass, PWHT; field bend limits; pigging & drying (dew point); lifting/transport protection.
20. Construction & installation risk control
• Welding: low-hydrogen, interpass/heat-input control; hardness for sour; AUT/RT/UT coverage by class/spec.
• Geometry & cleanliness: hi-lo/internal bead, ovality; pigging; debris control.
• FJC/coatings: parameters/heat cycles/holiday tests; CWC end handling.
• Hydrotest & drying: hold-time/criteria; dry-out to specified dew point; intelligent pig runs before commissioning.
• Integrity: fracture arrest (thick-wall/arrestors), CP and insulating joints, strain monitoring in geohazard/ seismic sections.
12. “No-go” list
• PSL1 used where PSL2 is mandatory.
• No CVN/DWTT at service Tmin for high-pressure gas.
• Sour lines without HIC/SSC or hardness control.
• Unqualified SAWH in HCA high-pressure gas.
• Incompatible FJC with parent coating.
• Substituting A106/A333 for API 5L mainline.
13. Global clusters and indicative mills (alphabetical; verify approvals)
• Europe: EUROPIPE (DE), Salzgitter Mannesmann Line Pipe (DE), Corinth Pipeworks (GR), Borusan Mannesmann (TR), Vallourec (FR/BR), EEW Group (DE, large LSAW).
• North America: Tenaris (US/MX/AR), Berg Pipe (US, LSAW), Welspun USA (US, SAW).
• Japan: Nippon Steel, JFE Steel.
• Korea: POSCO, Hyundai Steel.
• China: TPCO (seamless), Baowu/Baosteel (plate/SAW/stainless), Ansteel, PCK, Hengyang Valin, Shougang Jingtang.
• India: Jindal SAW, Welspun Corp, Maharashtra Seamless, ISMT, Man Industries.
14. Example spec lines
• Onshore gas trunkline:
“API 5L PSL2 X70 SAWL (UOE), OD 36 in × WT 0.750 in × L 12 m; CVN (BM/WM/HAZ) ≥ 60 J @ −20 °C; DWTT ≥ 85% shear @ −10 °C; 100% AUT; 3LPE total ≥ 2.5 mm; hydro each; MTC 3.2 (3rd-party).”
• Sour crude line:
“API 5L PSL2 X60 HFW, OD 20 in × WT 0.500 in; Sour service: hardness ≤ 250 HV10 (BM/WM/HAZ); HIC/SSC per TM0284/TM0177; external FBE ≥ 400 μm; 100% UT + spot RT; MTC 3.2.”
• Deepwater flowline:
“CS + CRA lined (316L 2.5 mm), API 5L PSL2 X65 SAWL, OD 12.75 in × WT 1.0 in; DNV-ST-F101 MPS/CTOD; 3LPP + ARO, CWC where needed; qualified FJC; full-scale collapse/fracture tests; MTC 3.2 (DNV witnessed).”
• CO₂ pipeline (CCUS):
“API 5L PSL2 X65 SAWL, OD 24 in × WT 0.625 in; ISO 27913; CVN/DWTT as per RFQ; 3LPE; CP & insulating joints; MTC 3.1/3.2.”
Tags:
