L485Q - API 5L X70Q Seamless Steel Line Pipe
Products Description
|
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
·Hydraulic pressure test per pipe
·Full‑body ultrasonic inspection
·PMI positive material identification
·Mechanical tensile test, Charpy V‑notch impact test
·DWTT drop‑weight tear test
·Dimensional & visual inspection
Packing
·Bundled by steel straps; plastic end caps for both pipe ends
·Waterproof packing; sea‑worthy export packing or as per customer's special requirements
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 25‑40 working days based on order quantity. Small quantity partial delivery can be negotiated.
