API 5L X65 Carbon Steel Pipes Manufacturer in India

API 5L X65 Carbon Steel Pipes Specifications

API 5L X65 Carbon Steel Pipes Standards

Material and Grades of API 5L X65 Carbon Steel Pipes

X65 belongs to the API 5L X series, above X60 and below X70. Mills reach 450 MPa through micro-alloying with niobium, vanadium and titanium, together with controlled rolling or quench and temper. This keeps carbon low, so the steel stays tough at low temperatures and weldable in the field.

PSL 1 follows the basic requirements. PSL 2 adds a lower carbon cap, tighter sulphur and phosphorus, a carbon equivalent limit, a ceiling on strength and mandatory Charpy testing. For X65, PSL 2 is delivered quenched and tempered (Q, seamless) or thermomechanically rolled (M, mainly welded), so tell us which your specification names.

Sour Service and Offshore Requirements for API 5L X65 Carbon Steel Pipes

X65 is a regular choice for sour gas and offshore lines, but the grade name alone does not make it suitable. These services are added to PSL 2 pipe through annexes of the standard, and each adds a suffix letter to the grade.

An X65MS pipe, for example, is thermomechanically rolled, sour service pipe. An X65QO pipe is quenched and tempered offshore pipe. If your line carries H₂S or sits offshore, tell us the suffix, fluid conditions and design temperature at enquiry. We confirm the grade, process and testing for your project before quoting, and the certificate should show compliance with the annex.

API 5L X65 Carbon Steel Pipes Chemical Composition

Individual limits on micro-alloy and residual elements follow the standard. Sour service and offshore orders can carry tighter limits.

API 5L X65 Carbon Steel Pipes Mechanical Properties

API 5L X65 vs X60 vs X52 vs X70 Pipes: How Much Wall Does Each Grade Need?

The matrix shows the wall required for a design pressure of 100 bar at three common diameters, using t = P × D ÷ (2 × SMYS × F) with a design factor of 0.72 and no corrosion allowance.

Moving from X60 to X65 cuts the required wall by about 8%, and the saving grows in millimetres as diameter rises. A 48-inch line needs about 1.6 mm less wall in X65 than in X60. Whether that pays off depends on the extra price per tonne, the welding cost and your inspection regime, so compare installed cost, not just steel weight.

API 5L X65 Carbon Steel Pipes Size and Weight Chart

Weight per metre is (OD − Wall) × Wall × 0.02466, with dimensions in mm. Mill tolerances move the real weight slightly.

Sizes, Dimensions and Tolerances of API 5L X65 Carbon Steel Pipes

Line pipe is ordered by outside diameter and wall in millimetres or inches, not by schedule. API 5L allows pipe body diameter to vary by ±0.75% from 60.3 mm up to 610 mm and by ±0.5% above that. Seamless pipe wall up to 25 mm is held to +15% and −12.5%.

For field welding, ends are normally beveled at 30 degrees (with a tolerance of +5 and −0 degrees), leaving a root face of about 1.6 mm (±0.8 mm) on walls above 3.2 mm. If your welding procedure needs a different bevel, land or compound profile, give us the drawing and we will prepare the ends to match.

Because heavy walls and tight design margins are common on X65 lines, state on the order whether the wall is a nominal or a minimum, and what length range you need (R1, R2 or fixed).

Welding API 5L X65 Carbon Steel Pipes

X65 welds well when the procedure is controlled, and most pipelines are joined under API 1104 or a project-specific code. Weld metal should match or slightly overmatch the pipe strength, so the joint does not become the weak point, while heat input and interpass temperature are kept within the qualified range.

Many contractors use mechanised gas metal arc welding for large-diameter lines, with cellulosic or low-hydrogen processes for tie-ins and repairs. The low carbon equivalent of PSL 2 pipe helps keep heat-affected zone hardness down. For sour service, weld hardness must also stay below the project limit, so weld procedure qualification should include hardness traverses.

Tell us your welding process and consumables at enquiry. It lets us check that the pipe chemistry and delivery condition suit your procedure.

Testing and Inspection of API 5L X65 Carbon Steel Pipes

Coating and Cathodic Protection for API 5L X65 Carbon Steel Pipes

Buried and subsea X65 needs a coating, almost always paired with cathodic protection. Fusion-bonded epoxy (FBE) suits moderate temperatures, and three-layer polyethylene (3LPE) gives extra mechanical protection in rocky or rough backfill. Offshore lines may add a concrete weight coating for stability. Tell us the coating system, thickness and cutback length, and we will help coordinate the work and confirm the plan with your inspector.

Common Materials Supplied with API 5L X65 Carbon Steel Pipes

We offer a wide range of carbon steel pipes and pipeline fittings for oil and gas, petrochemical, and industrial applications. Our product range includes different grades and accessories to meet specific project requirements, making us a reliable choice for API 5L X65 Carbon Steel Pipe Suppliers in India.

API 5L X52, X56, X60, and X70 Pipes: Available for pipeline projects requiring different strength levels.

API 5L Grade B and X42 Pipes: Suitable for oil and gas transportation and general pipeline applications.

ASTM A106 Grade B and C Pipes: Seamless carbon steel pipes designed for high-temperature service.

ASTM A333 Grade 6 Pipes: Suitable for low-temperature pipeline applications.

Carbon Steel Pipe Bends, Tees, and Reducers: Supplied for pipeline connections, direction changes, and size transitions.

Weld Neck Flanges: Available for connecting pipes to valves, pumps, and industrial equipment.

We manufacture and supply API 5L X65 Carbon Steel Pipes in various sizes and specifications to meet customer needs. Contact us with your required grade, pipe dimensions, wall thickness, and quantity for a quotation.

Applications of API 5L X65 Carbon Steel Pipes

• Offshore Pipelines: Subsea flowlines, export lines and platform-to-shore pipelines.
• High-Pressure Gas Transmission: Onshore trunk lines carrying natural gas over long distances.
• Sour Gas Gathering: Lines carrying H₂S-bearing gas from wells to treatment plants.
• Crude Oil Trunk Lines: Large-diameter lines between fields, terminals and refineries.
• Offshore Risers and Landfalls: Heavy-wall sections where strength saves weight.
• Pipeline Uprates and Loops: Sections that carry more flow at higher pressure.
• Compressor and Pump Stations: Station piping, headers and manifolds.
• LNG and Energy Infrastructure: Feed gas and transfer lines to terminals and plants.

Why Choose Us as Your API 5L X65 Carbon Steel Pipes Manufacturer in India?

With over two decades of experience, we manufacture and supply API 5L X65 Carbon Steel Pipes in India for oil and gas pipelines, offshore projects, and industrial applications. Our ISO 9001:2015 and TÜV certifications reflect our commitment to quality and manufacturing standards. With a production and supply capacity of up to 100 tons per month, we serve customers across 85+ countries, offering reliable supply, competitive pricing, and timely delivery.

We manufacture and supply API 5L X65 seamless and welded pipes in various sizes, diameters, wall thicknesses, and grades to meet specific project requirements. Our range includes PSL 1 and PSL 2 pipes, with relevant testing and documentation, including EN 10204 3.1 certificates. We carefully review specifications such as delivery condition, chemical composition, mechanical properties, Charpy impact testing, DWTT, and sour service requirements to ensure the supplied pipes match the intended application.

From standard pipe dimensions to project-specific requirements, we provide API 5L X65 Carbon Steel Pipes with the required grades, sizes, testing, and certifications. Our product range also includes other API 5L grades and complementary pipeline products to support diverse industrial needs. With established export experience across 85+ countries, we manage documentation, quality checks, and shipping requirements to ensure a smooth supply process from enquiry to delivery.

Choose us for dependable manufacturing, flexible specifications, consistent quality, and a supply network built on more than 20 years of industry experience. Contact us with your required grade, size, wall thickness, PSL level, and quantity for a quotation.

Countries We Export API 5L X65 Carbon Steel Pipes To

We manufacture and export API 5L X65 Carbon Steel Pipes to 85+ countries worldwide, supplying seamless and welded pipes in different sizes, wall thicknesses, and PSL 1 and PSL 2 grades. With over two decades of experience and a supply capacity of up to 100 tons per month, we serve oil and gas, pipeline, offshore, and industrial projects across international markets.

Europe: Germany, Italy, United Kingdom, Netherlands, France, Spain, Belgium and Poland.

Middle East: UAE, Saudi Arabia, Qatar, Oman, Kuwait and Bahrain.

Africa: South Africa, Nigeria, Egypt, Kenya and Angola.

Asia-Pacific: Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan and Australia.

Americas: USA, Canada, Mexico, Brazil and Chile.

South Asia: Nepal, Bangladesh and Sri Lanka.

We supply API 5L X65 pipes with the required grades, dimensions, testing, and certifications according to project specifications. Our export services include quality documentation and shipping coordination to support smooth deliveries across global markets.