API 5L ASTM A106 Gr.B Seamless Carbon Steel Pipe Sch40/Sch80 1/2"-24" Black

API 5L pipes serve as indispensable infrastructure across the entire oil and gas value chain. In upstream operations, they are used for high-pressure gas gathering between wellheads, water injection in enhanced recovery, and multiphase transportation of produced fluids. In midstream, they are the preferred material for national pipeline network trunks, inter-provincial connecting lines, subsea pipelines, and process piping within compressor stations, metering stations, and valve chambers. In downstream, they are widely employed in refineries, chemical plants, LNG receiving terminals for process media conveyance, and product distribution branches at oil depots. Beyond traditional oil and gas, these pipes are extensively applied in urban high-pressure gas distribution networks, large-scale inter-basin water diversion projects, district heating mains, and mine tailings and coal-slurry pipelines. In structural engineering, API 5L pipes are often utilized as jacket legs for offshore platforms, bridge piers, high-rise building steel frames, and load-bearing components for heavy machinery, fulfilling both conveyance and structural functions in a single material.

3. Product Advantages

• Optimal Strength–Toughness Balance: Through micro-alloying and thermo-mechanical controlled rolling, the pipes achieve simultaneous high strength and high toughness, capable of withstanding internal pressures of several tens of MPa while maintaining sufficient upper-shelf impact energy at low temperatures to effectively resist brittle initiation.

• Superior Field Weldability: PSL2 grades strictly control carbon equivalent (CEV) and cold-cracking sensitivity coefficient (Pcm), eliminating the need for costly preheating and post-weld slow cooling on site, thus shortening construction schedules and reducing installation costs.

• Full Lifecycle Traceability: Every production step, from continuous casting to finished pipe, is recorded in a quality management system. Traceability is ensured through permanent pipe marking and accompanying documentation, providing precise data support for maintenance and replacement during the operational phase.

• Tailored Sour Service Solutions: For H₂S-containing formations, pipes can be supplied in compliance with NACE MR0175, featuring ultra-low sulfur and phosphorus (S≤0.002%, P≤0.015%) and strict hardness control (≤250 HV10), supplemented by mandatory HIC and SSC tests, ensuring no stress cracking occurs in wet H₂S environments.

• High Dimensional Precision: Advanced forming and sizing techniques ensure ovality, wall thickness deviation, and straightness that are tighter than API minimum requirements, facilitating mechanized fitting and fully automatic welding on site, improving first-pass weld acceptance rates.

• Coating Compatibility and Extended Life: The pipe substrate is compatible with various external anti-corrosion coatings (FBE, 3LPE, 3LPP) and internal flow-efficiency coatings. When coupled with cathodic protection, the pipeline can achieve a design service life of over 50 years in buried conditions, significantly reducing lifetime maintenance costs.

​

4.​Key Product Parameters

FAQ

1. Are you trading company or manufacturer ? We are manufacturer ,You can see the certification.

2.How long is your delivery time? Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.

3. Do you provide samples ? is it free or extra ? Yes, we could offer the sample for free charge but need pay the cost of freight.

4. What is your terms of payment ? Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.