L485Q - API 5L X70Q Seamless Steel Line Pipe
API 5L X70Q / L485Q seamless steel pipe is a high-strength pipeline steel, widely used for long-distance onshore and offshore oil & gas transmission projects.
It meets API 5L PSL2 requirements, with good low-temperature toughness and stable mechanical properties.
Hongqixiang Metal Products can supply complete OD and wall thickness sizes.
Custom fixed-length cutting, marking and export packing are available.
All pipes are tested and supplied with official Mill Test Certificate before shipment.
Send us your required specifications for the best factory price.
|
Item |
Specification |
|---|---|
|
Product Name |
L485Q / X70Q Seamless Steel Line Pipe |
|
Applicable Standard |
API Spec 5L (PSL‑2), GB/T 9711‑2011, ISO 3183 |
|
Delivery Condition |
Quenched & Tempered (Q) |
|
Outside Diameter |
60 mm ~ 426 mm (customized available) |
|
Wall Thickness |
6 mm ~ 40 mm |
|
Length |
5.8 m ~ 12 m, fixed‑length on request |
|
Pipe End |
Beveled end (standard), plain end; plastic end caps protection |
|
Surface Condition |
Bare black,‑rust oil, 3LPE / FBE epoxy coating upon request |
|
Document |
Mill Test Certificate EN 10204 3.1, PMI report, NDT report, third‑party inspection (SGS / BV / CCIC) |
"Mechanical Properties (API 5L PSL‑2 Requirement):
|
Property |
Value |
|---|---|
|
Yield Strength |
485 ~ 635 MPa |
|
Tensile Strength |
570 ~ 760 MPa |
|
Yield‑‑Tensile Ratio |
≤ No. 0.93 |
|
Elongation (50 mm gauge) |
≥ 10% |
|
Transverse Impact Energy (-20 ℃) |
≥ 68 J |
|
DWTT Drop‑Weight Tear Test |
Complied with API 5L requirement |
Typical Chemical Composition (Weight %, Max)
|
C |
Si |
Mn |
P |
S |
Nb |
V |
Ti |
|---|---|---|---|---|---|---|---|
|
0.16 |
0.45 |
1.65 |
0.020 |
0.003 |
0.05 |
0.09 |
0.06 |
Production & Test Items
·
Application Fields
1.Offshore oil & gas pipelines: subsea pipelines, offshore platform process piping, riser auxiliary piping for low‑temperature marine environmentAlibaba.co...
2.Long‑distance high‑pressure onshore trunk lines: natural gas & crude oil transmission pipelines in cold regions
3.Cold‑climate energy projects: pipeline construction for low‑temperature, frigid geographical zones
4.Petrochemical industry: high‑pressure process pipelines for refinery and petrochemical plants
5.Shale gas & tight gas gathering pipelines: high‑pressure gathering‑transmission pipelines under complex geological conditions
FAQ
Q1: What is the difference between L485 and L485Q?
A: L485 (X70) is normal thermo‑mechanically rolled grade.L485Q (X70Q)is quenched‑and‑tempered heat‑treated grade. L485Q provides much better low‑temperature toughness and DWTT performance, mainly used for offshore, deep‑cold area critical pipelines where‑brittle fracture is required.
Q2: Can L485Q be used for sour H₂S service?
A: Standard L485Q is for general low‑temperature/off‑shore service. For sour service with hydrogen sulfide, please selectL485QS / X70QSgrade with strict low‑sulfur control and HIC test requirement. Please advise medium composition and working environment for correct grade selection.
Q3: What size range can you supply for L485Q seamless pipe?
A: OD 60 mm‑426 mm seamless pipe, wall thickness from 6 mm to 40 mm. We support custom fixed‑length cutting. Large OD above 426 mm normally applies welded line pipe.
Q4: What certificates can you provide?
A: Original mill test certificateEN 10204 3.1is supplied. 3.2 certificate with third‑party witness inspection (BV / SGS / CCIC) is available upon customer order. PMI, UT, hydro‑test documents are included in test package.
Q5: What surface coating options are available?
A: Bare black pipe with‑rust oil as default.‑corrosion coating options: 3LPE, 3LPP, FBE fusion bonded epoxy, coal‑tar epoxy. Coating thickness can follow customer specification.
Q6: Is field welding feasible for L485Q?
A: Yes, L485Q owns good weldability. Welding procedure specification (WPS) shall be qualified in advance according to API 5L project requirements.
Q7: What is your lead‑time?
A: Production lead‑time normally 7-10 working days based on order quantity. Small quantity partial delivery can be negotiated.
