Manufactured from seamless carbon steel and low-alloy steels using hot-rolled or cold-drawn processes, our seamless line pipes offer high strength excellent toughness, good weldability, and corrosion resistance. Widely used in oil & gas, petrochemical, power, shipbuilding, offshore engineering, and mechanical industries, these pipes are produced in strict compliance with international standards, ensuring safety and reliability under demanding service conditions.
Key Features
Standards:
International: API SPEC 5L (Line Pipe), API SPEC 5CT (Casing/Tubing), ASTM A106/A53, EN 10216-2, ISO 3183 ,Nace Mr 0175/Mr0313 (sour service)
Domestic: GB/T 9711 (Steel Pipes for Pipeline Transportation Systems), GB/T 8163 (Seamless Tubes for Fluid Transport), GB/T 5310 (Seamless Steel Tubes for High-Pressure Boilers).
Materials:
Seamless Carbon Steel: 20#, 45#, A106 Gr.B, A53 Gr.B, L245/L290/L360/L415/L450/L485 ,B-X100 (API 5L Series).
Low-Alloy Steel: 16Mn, 20MnMo, 12Cr1MoVG, 42CrMo, and other high-strength, corrosion-resistant grades.
Dimensions:
Outer Diameter (OD): 8 mm – 1240 mm
Wall Thickness (WT): 1 mm – 200 mm
Length: Fixed (e.g., 6m, 12m) or custom (up to 18m)
Applications:
Long-distance oil/gas pipelines (onshore & offshore), refinery process piping, gas gathering systems, offshore platform structures, boiler superheaters, hydraulic systems, high-pressure vessels.
Certifications:
Classification Society Certifications: Approved by ABS (USA), BV (France), DNV (Norway), LR (UK), NK (Japan), CCS (China), RINA (Italy) – suitable for marine and offshore projects.
End-User & Engineering Company Approvals: Qualified supplier for CNPC, Sinopec, CNOOC, Shell, BP, Chevron, Total, ExxonMobil, Fluor, Bechtel, and other major EPC contractors.
Quality System Certifications: ISO 9001, ISO 14001, ISO 45001, API Q1, API 5L Monogram, PED 2010/35/EU (CE Marking).
Common Customer Questions (Q&A Format)
Q: Which standards do your seamless line pipes comply with?
A: Mainly API SPEC 5L, ASTM A106, GB/T 9711. Custom production to EN, JIS, or ASME standards is also available.
Q: What materials can you supply? Can you customize special alloys?
A: Standard grades include A106 Gr.B, L245NB, X52-X80. We support custom alloys like 12Cr1MoVG and 15CrMo upon technical agreement.
Q: What are your minimum and maximum OD and wall thickness capabilities?
A: OD range: 8mm–1240mm; WT range: 1mm–200mm. Full range from instrumentation tubes to large-diameter transmission lines.
Q: Do you have classification society certifications? Can your pipes be used in offshore platforms?
A: Yes, we hold factory approval from ABS, DNV, BV, CCS, RINA, NK,etc., making our pipes suitable for offshore platforms, FPSOs, and subsea pipelines.
Q: Are you approved by international oil companies such as Shell or BP?
A: Yes, we have passed supplier qualification audits by major oil & gas companies and their EPC partners for project supply.
Q: What is the typical lead time? Can urgent orders be expedited?
A: Standard delivery: 25–45 days. Stock items can ship in 7–15 days. Urgent orders can be prioritized based on production capacity.
Q: Do you offer anti-corrosion coatings such as 3PE, FBE, or epoxy paint?
A: Yes, we provide internal/external epoxy coatings, FBE (Fusion Bonded Epoxy), 3PE/3PP, galvanizing, and passivation to meet various corrosion protection needs.
Q: How do you ensure product quality? Can third-party inspection reports be provided?
A: Each batch undergoes chemical analysis, tensile, impact, flattening/flaring tests, ultrasonic testing (UT), and hydrostatic testing. Reports from SGS, BV, TUV, or customer-designated labs are available.
Q: What packaging and shipping methods do you support? Do you export to Europe, Middle East, Africa?
A: Packaging: end caps, strapping, or wooden cases. Shipping: sea, land, rail. Products exported to USA, Canada, UAE, Saudi Arabia, Nigeria, Brazil, Australia, and over 50 countries.
Q: Do you accept OEM/ODM cooperation? Can we print our brand on the pipes?
A: Yes, OEM/ODM is supported. We can laser mark or paint your brand, size, batch number, and API logo, and provide full quality documentation.
Q: Do you supply Source Service pipe such as HIC, SSC test ?
A: Yes, HIC, SSC tested pipe (sour service) is rapidly used in Middle East country such Saudiarab, KOC, UAE .
Q: Lifespan of Anti-Corrosion Coatings?
A: Epoxy: 15 years (indoor)/10 years (outdoor); 3LPE: 30 years (buried conditions)
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